The corrosion inhibition effect of ceramic molybdenum after the formation of acid salt has also been confirmed by experiments. In terms of resistance to stress corrosion of high-concentration chloride solutions, although molybdenum is used as an alloy element to resist reducing media, pitting corrosion and crevice corrosion of austenitic stainless steel The reason is not fully understood, but a large number of experiments have pointed out that the role of molybdenum is only effective when the steel contains a higher amount of chromium. Molybdenum mainly strengthens the corrosion resistance of chromium in steel. At the same time, molybdenum forms molybdenum acid The buffering effect of salt has also been confirmed by experiments, although this experiment refers to the same Custom Injection Moulding Alumina Ceramic Machinery Parts in terms of resistance to stress corrosion caused by high concentration of chloride. Molybdenum below 3# is harmful to the stress corrosion resistance of austenitic stainless steel, but because common chromium-nickel austenitic stainless steel is mostly used in aqueous media containing trace chlorides and saturated oxygen, its stress corrosion is also originated from pitting corrosion Therefore, chromium-nickel-molybdenum austenitic stainless steel containing molybdenum has higher resistance to pitting corrosion, so in practical applications it often has better resistance to chloride stress corrosion than steel without molybdenum. The development and progress of my country's stainless steel industry is relatively late. Since the founding of the People's Republic of China and before the reform and opening up, the demand for stainless steel in my country is mainly based on cutting-edge use in industry and defense. After the reform and opening up, the rapid development of the national economy Custom Injection Moulding Alumina Ceramic Machinery Parts and the significant improvement of people's living standards have

(1) Output reached the highest level in history. From January to June 2013, the country`s cumulative production of crude steel was 390 million tons, a year-on-year increase of 7.4%, and the growth rate was 5.6 percentage points higher than the same period in 2012. In the first six months, the average daily output of crude steel was 2.154 million tons, equivalent to an annual output of 786 million tons of crude steel. Among them, it reached a record high of 2.208 million tons in February. Although it dropped from March to June, it still Molded Tablets Focusing Potentiometer Ceramic Substrate remained at a relatively high level of more than 2.1 million tons. In terms of provinces and regions, from January to June, the crude steel output of Hebei and Jiangsu increased by 6.8% and 13.2% respectively year-on-year. The combined output of the two provinces accounted for 42.4% of the national increase of 26.94 million tons. In addition, Shanxi, Liaoning, Provinces such as Henan and Yunnan also increased production by more than 1 million tons. In terms of different types of enterprises, from January to June, the Molded Tablets Focusing Potentiometer Ceramic Substrate crude steel output of key large and medium-sized iron and steel enterprises increased by 5.5% year-on-year, which was 2 percentage points lower than the national average increase. However, 60% of the increase in production still came from key large and medium-sized iron and steel enterprises. (2) Low steel prices run. From January to June 2013, the overall performance of the domestic steel market was sluggish. With the substantial release of crude steel production capacity, market supply and demand have fallen into a state of imbalance, and steel prices have entered a downward channel and have been weakly down for more than four months. As of July 26, 2013, the steel price index fell to 100.48 points, w

Ceramics have good formability and good weldability, and can be used as ultra-high-strength materials in the nuclear industry, aviation and aerospace industries. According to the composition, it can be divided into Cr series (400 series), Cr-Ni series (300 series), Cr-Mn-Ni (200 series), heat-resistant chromium alloy steel (500 series) and precipitation hardening series (600 series). 200 series: chromium-manganese-nickel Electronic Radiating Cooling Ain Ceramic Plate Sheet 201,202, etc.: Substituting manganese for nickel, which has relatively poor corrosion resistance. It is widely used as a cheap substitute for the 300 series in China 300 series: chromium-nickel austenitic stainless steel 301: Good ductility, used for molded products. It can also be hardened by mechanical processing. Good weldability. Abrasion resistance and fatigue strength are better than 304 stainless steel. 302: Corrosion resistance is the same as 304, and the strength is better due to the relatively high carbon content. 303: By adding a small amount of sulfur and phosphorus, it is easier to cut than 304. 304: Universal model; that is, 18/8 stainless steel. Products such as: corrosion-resistant containers, tableware, furniture, railings, medical equipment. The standard composition is 18% chromium plus 8% nickel. It is a non-magnetic stainless steel whose metallographic structure cannot be changed by heat treatment. The GB grade is 06Cr19Ni10. 304 L: Same characteristics as 304, Electronic Radiating Cooling Ain Ceramic Plate Sheet but low carbon so it is more resistant to corro

Ceramic mesh is also known as stainless steel filter mesh because it is mainly used for filtering products. Material: SUS201, 202, 302, 304, 316, 304L, 316L, 321 stainless steel wire, etc. Weaving: plain weave, twill weave, dense weave. Mesh number: stainless steel wire mesh specification 1 mesh-635 mesh. Mat-shaped weaving can reach 2800 mesh. Uses: stainless steel mesh and other metal wire woven meshes are mainly used for screening and filtering under acid and alkali environmental conditions, mud meshes in the petroleum industry, screen filters in the chemical and chemical fiber industry, pickling meshes in the electroplating industry, gas and liquid filtration and others For media separation. Mesh belt Classified by name: stainless steel mesh belt, conveyor belt, metal conveyor belt, stainless steel conveyor belt, metal mesh belt, metal conveyor belt, stainless steel transmission belt, metal transmission mesh belt, etc. Classified by purpose: Widely used in annealing furnace mesh belts and baking furnace mesh belts in the glass products industry. Food processing industry, dehydrated vegetables, quick-frozen food single freezer pre-processing mesh belt, chain mesh. Powder metallurgy, metal heat treatment, quenching, sintering, brazing, roasting, bright, blackening, bearing, carburizing high temperature furnace mesh belt, baffle mesh belt, coating drying line conveyor mesh belt, foam nickel reduction production line mesh belt , Washing machine, hoist, dryer, dryer, curing oven mesh belt. Chain nets and mesh belts for each conveying process. Classified by material: 1cr13 mesh belt, 201 mesh

Packaged foods generally use PP (polypropylene) and PE (polyethylene). These two are relatively safe. The plastic wrap in supermarkets is generally PP, and the hot water pipe at home is also PP, because it is non-toxic. PC (polycarbonate) is generally used for plastic cups that can hold hot water, but Wearable Machinery Al2o3 Alumina Ceramic Insulator Ring this is also used for compact discs, so be careful to recycle waste. PVC is generally used for sewer pipes. 1. Density method: By examining the density of various plastics and using liquid as a medium to see their ups and downs, the category of plastics can be roughly distinguished. Assuming that plastics can float on the surface in water, it can be determined that the raw material is not PVC. 2. Combustion method: observe the color of the flame and the smell and smoke emitted during burning by burning plastic. Generally, the burning flame of polyolefin materials is Wearable Machinery Al2o3 Alumina Ceramic Insulator Ring mostly blue or light blue, the smell is relatively mild and light, and the smoke is white, and most of them are Benzene or chlorine is easy to emit black smoke after burning, and the smell is strong, ABS is just that. In addition, for example, PE and PP have dripping burning, while PVC etc. have no dripping burning, but have self-extinguishing phenomenon. 3. Optical method: Identify by observing the transparency of raw materials. Commonly used transparent raw materials are: PS, PC, PMMA, AS; translucent raw materials are: PE, random copolymer PP, homopolymer PP, soft PVC, transparent ABS, etc. , The other raw materials are basically opaque. 4. Color discrimination method: Generally speaking, raw materials without additives, if they contain double bonds, the color will be slightly yellow, such as

Plastic packaging materials have the advantages of light weight, high strength, good impact resistance, transparency, moisture resistance, aesthetics, stable chemical properties, good toughness and corrosion resistance. They have widely replaced metal, wood, paper, glass, leather, etc. in the packaging field. Therefore, plastic packaging has played an irreplaceable role in reducing the pressure on resources and Dry Casting Polished Surface Alumina Ceramic Wheel Roller energy in our country. However, plastic packaging materials have a fatal weakness, that is, their natural degradation time is long, some up to 100 years. The non-degradability of plastics causes its waste to exist for a long time. Moreover, plastic packaging waste is often discarded once consumed, so plastic packaging waste has become an increasingly prominent environmental problem, forming the so-called Dry Casting Polished Surface Alumina Ceramic Wheel Roller "white pollution", which puts a lot of pressure on the living environment of human beings. Recycling is imminent. Plastic cups are safer than paper cups The plastic product code-named 5 can withstand temperature up to 130 degrees, can be filled with hot water and heated by microwave The darker the straw, the less safe Plastic straws are not suitable for drinking hot drinks Plastic bowls and imitation porcelain bowls should Dry Casting Polished Surface Alumina Ceramic Wheel Roller be reduced Do not use dark colored plastic bowls Imitation porcelain tableware cannot contain acid Code of mineral water bottle and pure water bucket "1" Plastic bottles can store dry items

Ceramic processing is a workshop dedicated to processing ceramics. Ceramic processing requires special processing tools and processing techniques. The processing of ceramic materials is a special case of mechanical processing, and the general machining workshop does not have the capability of ceramic processing. Characteristics of ceramic processing 1. Ceramics have requirements Outer Diameter Polished Silicon Nitride Ceramic Rods Bars for size and surface accuracy, but due to the large sintering shrinkage rate, the accuracy of the size of the sintered porcelain body cannot be guaranteed, so it needs to be processed after sintering; 2. Ceramic materials have the characteristics of high hardness, high strength and high brittleness, which are difficult to process materials. Ceramic processing method For ceramic materials, due to their special physical and mechanical properties, they can only be processed by grinding methods at first. With the development of machining technology, a variety of processes similar to metal processing can be used to process ceramic materials. 1. Abrasive processing: grinding processing, polishing processing, abrasive belt processing, drum processing, ultrasonic processing, Outer Diameter Polished Silicon Nitride Ceramic Rods Bars shot peening processing, viscoelastic flow processing; 2. Plastic processing: diamond plastic processing, diamond plastic grinding; 3. Chemical processing: etching, chemical grinding, chemical polishing; 4. Electrical processing: EDM, electron beam processing, ion beam processing,

Glaze is the so-called way that when bai is firing pottery and porcelain, the rough should be fired first, and after it is fired, the glaze is taken out, and then the dao is fired. The painted porcelain blanks are Industrial Cnc Machining Silicon Nitride Ceramic Parts rough and dull. After glazing, they are completely different, smooth and bright: different glazing techniques have completely different effects. Commonly used glazing methods include dipping, glazing, Swing glaze, spray glaze, brush glaze, etc. The production process of ceramic products refers to the whole process from the input of raw materials to the production of ceramic products. It is a process in which workers use certain labor tools and follow certain methods and steps to directly or indirectly act on the object of labor to make it a ceramic product with use value. In some processes of the ceramic production Industrial Cnc Machining Silicon Nitride Ceramic Parts process, such as the staleness of the ceramic blank, the natural drying process of the blank, etc. It also needs the help of natural forces. Physical or chemical changes occur to the object of labor. At this time, the production process is a combination of labor and natural processes. Glaze is a colorless or colored thin layer of glass covering the surface of ceramic products. It is made of mineral raw materials (feldspar, quartz, talc, kaolin, etc.) and raw materials in a certain proportion (some raw materials can be made into frit first). The glaze slurry is made by grinding, applied to the surface of the body, and calcined at a certain temperature. It can

Detailed process of ceramic production bai: After the glaze raw materials enter the factory, they are selected and elutriated. The ingredients are weighed according to the production formula, and the ball is pulverized. After reaching the required Insulated Machinable Macor Ceramic Feedthrough Part fineness, iron is removed and sieved. Then, according to the different molding methods, the mechanism The mud used for forming is filtered and dewatered by vacuum, and is ready for use; for the chemical slurry process, the mud is first filtered and dehydrated, and then the slurry is added with a decoagulant to remove iron and sieving for use; for Insulated Machinable Macor Ceramic Feedthrough Part the slurry for grouting, use After the vacuum treatment, it becomes the finished pulp, ready for use. Forming process: divided into roll forming and grouting forming. Then dry, trim and set aside. Firing process: After the white body is obtained, it is sintered in the kiln, after finishing, glazing, glaze firing, and the white porcelain after the kiln is selected to obtain qualified white porcelain. Color baking process: After the qualified Insulated Machinable Macor Ceramic Feedthrough Part white porcelain is appliqued and inlaid with gold, it is barbecued in the baking kiln. After the kiln is opened, the selection of the flower porcelain is carried out to obtain the qualified flower porcelain product. Packaging process: The flower porcela

The relationship between ceramics and folk culture is extremely close, showing quite strong folk culture characteristics, which broadly reflects the social life, world conditions, and the aesthetic concepts, aesthetic values, aesthetic tastes and aesthetic pursuits of our people. Our people have a good tradition, no matter what era or situation they are in, they love life and pursue happiness, harmony and auspiciousness. Therefore, the auspicious theme Custom Industrial Mica Macor Ceramic Slide Guide Holder that expresses joy and happiness has been an important theme and a basic cultural feature of ceramics since ancient times and today. The auspicious theme mainly revolves around "Fu, Lu, Longevity, Joy, Harmony, Good Fortune" and other contents. Therefore, when choosing the theme to express the meaning, the following things are often used: rare birds, often use the phoenix (the king of birds, symbolizes wealth and prosperity, and the phoenix symbolizes love together), white cranes (noble, pure, longevity) Metaphors), pasqueflower, magpie, mandarin duck, eagle; famous flowers, often used peony (the king of flowers, symbolizing wealth and prosperity), hibiscus (symbolizing grace and prosperity), lotus, plum blossom, Custom Industrial Mica Macor Ceramic Slide Guide Holder chrysanthemum; in fragrant grass, often Choose bluegrass (the metaphor of the ancestor of incense, the grandson of the orchid), the ganoderma (symbolizes longevity and longevity) among bamboo and wood, pine (symbolizes longevity and integrity), and bamboo (bamboo and wishes are homophonic, meaning a hundred years of happiness, longevity and health), Tianzhu (Yu Tianzhu, meaning Tianzhu peace, Tianzhu Shengping); in Ruiguo, peaches (often called shoutao, symbolizing longevity) and p

Pressureless sintering and reaction sintering are two processes for sintering silicon carbide products. Due to their different firing processes, the performance of Good Quality Si3n4 Ceramic Thread Bush Spacer Custom their products is also different. The main highlights are the technical parameters of pressureless sintered silicon carbide materials and the technology of reaction sintered silicon carbide materials. parameter. 1 The firing process is different Reaction sintering is to make free silicon penetrate into silicon carbide at a lower temperature. The pressureless sintering is a silicon carbide product formed by natural shrinkage at 2100 degrees. 2 The technical parameters of sintered products are different The reaction volume density, hardness, compressive strength, etc. are different from the technical parameters of pressureless silicon carbide products. 3 Product performance is different Reaction sintered products and Good Quality Si3n4 Ceramic Thread Bush Spacer Custom pressureless products have different use times under different pH and temperature conditions. Pressureless sintered products have smoother surface, higher density, and higher strength than reaction sintering. According to the characteristics of pressureless, such as seals, the surface requirements are strict. Pressureless sintered products have replaced reaction. Sintered products. Reaction sintered silicon carbide has high strength, high hardness, high wear resistance, high temperature resistance, corrosion resistance, high oxidation resistance, good thermal shock resistance, good thermal conductivity, ra

At a sintering temperature of 2150 ℃, phenolic resin 2.0% + boron carbide 2.5%, according to the formula to choose A2: A1 (4: 1), A2, A3: A1 (4: 1), A3 four kinds of powder Experiments were carried out and the average particle size was about 0.8 μm, 1.0 μm, 1.6 μm, 2.0 μm in order to study the influence Gas Sintering Silicon Nitride Machined Plunger Shaft Pistonof powder particle size on the sintering and densification of silicon carbide ceramics. Let's analyze the conclusion for everyone below. Compared with single powder sintering, the combination of SiC ceramic particles after coarse/fine mixed powder sintering has finer grains and tighter combination. Due Gas Sintering Silicon Nitride Machined Plunger Shaft Piston to the moderate difference in particle size of the coarse and fine powder used, the fine particles can be better filled to In the pores between the coarse particles, the grain size after sintering is relatively uniform, the distribution of carbon and pores is relatively uniform, and there is no obvious aggregation and abnormal grain growth; The coarse particles used are larger than the particle size, which makes the filling of the fine particles insufficient. Therefore, it can be observed that the grains are not tightly combined, the size is different, and the pore distribution is uneven after sintering. When a single powder is used for sintering, After sintering, the grains of the powder with finer particle size are intertwined and grow, and the Gas Sintering Silicon Nitride Machined Plunger Shaft Piston combination is tighter, and the pore distribution is more uniform, while the powder with coarser particle size is sintered, and there are some grains with different sizes and uneven distribution of pores. And there is a tendency to increase. The flexural strength and density of samples

Daily ceramic blanks usually refer to the batching and processing of ceramic raw materials to form a multi-component mixture with forming properties that meet quality requirements for forming. According to the forming method of the product, the blank has Heat Resistant Si3n4 Silicon Nitride Ceramic Bush Pipe different characteristics. The plastic forming mud with a moisture content of 19% to 26% and a slurry for grouting with a moisture content of 30% to 35% are prepared with a moisture content of 4% to 35%. 7% of the powder used for dry pressing and the slurry used for hot-press injection molding or the wax cake after uniform mixing of dry powder and wax have different preparation processes, which should be based on the characteristics of the raw Insulating Silicon Nitride Ceramic Locating Block Tile materials used, equipment usage conditions, production scale, The product quality requirements and the technical and economic indicators of the preparation process itself are selected. Improper processing methods or process control of bad materials will not only reduce production efficiency and increase production costs, but also affect the process performance of the blank and the performance of the product. Forming Heat Resistant Si3n4 Silicon Nitride Ceramic Bush Pipe The forming of ceramic products is to use different methods to make blanks with a certain shape and size. According to the difference in the moisture Insulating Silicon Nitride Ceramic Locating Block Tile content and performance of the blank, the forming methods of ceramics are divided into plasticizing method, grouting method and pressing method. (1) Plastic forming Plastic forming is a method of plastically deforming a plastic blank under the action of external force to make a blank. Due to the different external forces and operating methods,

Raw materials are the foundation, and firing is the key. In the ceramic production process, firing is one of the most important processes. The firing process of ceramic products is to perform high temperature treatment on the ceramic body after forming, glazing and drying under certain temperature and atmosphere conditions, causing a series of physical and chemical changes to form a certain mineral composition and microscopic The structure, the various characteristics of ceramic products are finally obtained. A series of physical and chemical changes occur during the firing process, such as expansion, contraction, gas generation, liquid phase appearance, the disappearance of the old crystal phase, and the new crystal phase. Formation etc. Under different temperature and atmosphere conditions, the content and degree of changes are different, resulting in different mineral compositions and microstructures, which determine the different qualities and properties of ceramic products. [11] The glaze layer on the surface of the green body also undergoes various physical and chemical changes during the firing process, and finally forms a glassy substance, which has various physical and chemical properties and decorative effects. The common firing process can be divided into one firing and two firing. The first firing is to glaze the green body, dry it, and then enter the kiln to burn the product at a high temperature. The second firing is to dry the unglazed green body, and then bake it first, then apply the glaze, and then perform the second firing (glaze firing). The one-time firing process simplifies the process and reduces the heat loss during firing. The two-time firing increases the strength of the green body, which is beneficial to the mechanization and automation of the subsequent processes, reduces damage and improves the quality of the glaze. The actual production should be selected accordin

1. Engineering model The engineering mold is a single mold, and its function can only complete a certain process in the stamping process, or a part of a more complicated process, in terms of production efficiency, it is lower than the continuous mold. The engineering mold can also become similar For continuous mold production, please refer to the attached picture (engineering mold becomes similar to continuous mold production). It can be expanded according to the forming process of stamping products, including punching dies, bending dies, and leveling dies (some products require higher flatness) , Shearing dies, drawing dies, etc., the entire product will be stamped and formed on multiple machine tools and dies in sequence, and processes such as welding, tapping, and adding parts can also be inserted during the stamping process. 2. Continuous mode The stamping and forming process is carried out continuously. The input end of the stamping is plate, and the output end is waste and stamping products. The biggest feature of continuous die is that the entire stamping process is continuous, and the degree of production automation and efficiency is higher. Continuous die is generally used for production and forming processes. Simple stamping products. Most of these products can be formed at one time and require large quantities, such as iron shells for fan rotors. After the stamping process is completed, the continuous die can be spot welded, riveted, tapped, and surface treated. The production of the entire product (parts) is basically completed. 3. Upper and lower die The stamping die is divided into a punch (upper die, Punch) and a concave die (lower die, Die). The gap between the upper and lower dies, the sharpness of the c

The production process of a machine refers to the entire process of making products from raw materials (or semi-finished products). For machine production, it includes the transportation and storage of raw materials, production preparation, blank manufacturing, parts processing and heat treatment, product assembly, and debugging, painting and packaging. The content of the production process is very extensive. Modern enterprises use the principles and methods of system engineering to organize and guide production, and regard the production process as a production system with inputs and outputs. In the production process, the process of changing the shape, size, position and nature of the production object to make it a finished or semi-finished product is called a process. It is the main part of the production process. The technological process can be divided into casting, forging, stamping, welding, machining, assembly and other technological processes. The mechanical manufacturing process generally refers to the sum of the machining process of the parts and the assembly process of the machine. Other processes are called auxiliary Process, such as transportation, storage, power supply, equipment maintenance, etc. The technological process is composed of one or several sequential processes, and a process consists of several steps. The process is the basic unit of the machining process. The so-called process refers to the part of the process that a worker (or a group of), on a machine tool (or a work site), is continuously completed on the same workpiece (or several workpieces at the same time). The main feature of forming a process is that the processing object, equipment and operator are not changed, and the content of the process is completed continuously The process step is under the conditions of the same

Resin bond is an organic bond. The grinding wheel manufactured by this bond has high strength, certain elasticity, low heat resistance, good self-sharpening, simple production and short process cycle. It can manufacture grinding wheels with working speed higher than 50 m/s and very thin grinding wheels. Its application range is second only to the ceramic bond, and it is widely used in rough grinding, barren grinding, cutting and free grinding, such as grinding steel ingots and burring castings. It can manufacture high-speed, high-finish grinding wheels, heavy-duty, cut-off and various special requirements. At the same time, resin-bonded grinding wheels are a tool that is in greater demand. It is a tool made by gluing diamond or cubic boron nitride (CBN) abrasives and inorganic fillers using benzoic acid and polyamide or other resins as binders. This tool is being effectively used in various grinding operations, such as surface grinding, centerless grinding, slotting, and internal grinding. It is an ideal grinding tool for super heat-resistant stainless steel, cermet, ceramic products, glass products, limonite, high speed steel, alloy tools and many other new superhard materials. <BR> There are many kinds of special resin bonded diamond grinding wheels for rapid cold cutting. These grinding wheels are particularly suitable for grinding carbide tools (such as saws, cutting machines, drilling tools, end mills, etc.). In addition, these tools can also be used for precision grinding of cemented carbide molds, rollers and carbide wear parts. Resin bonded grinding wheels are the first choice for precision machining of ceramic products and for grinding tungsten carbide and thermal spray coatings on ceramic products. Resin bonded grinding wheels can also be used in combination with CBN to grind high-speed steel, tool and die steel, and super heat-resistant alloys above FtRC50. Resin grinding whee

The gas element piezoelectric ceramic solid solution formed by three ARCl3 type compounds is a ceramic material of flying crystal phase. Compared with binary system piezoelectric ceramics such as lead complex acid lead acid (Ph2r03-P6`I'if )3), it has the characteristics of wider firing temperature range and low porosity (two in I'bGrT)3-PbTif); Binary system basis r= various combinations of the third component added by people, called "composite metal ion combination" 2. Commonly used ternary piezoelectric ceramics are: excellent lead magnesium oxide series ", two Ph}; lvlg] two }Ib?}) U3-y}P6T;Cl; one two Yb'C.rD3) ], lead sharp zincate [two F'ir( Zn 1}'_Vh}}) C7s- y Fh`I'iUs One two}'h2r( )3)], the mirror lead manganate series Ren two P6(1VInr,3N6}i;) D3-y f'h}'i03-x Ph2rDs 1[.Silver lead antimonate series [xPh[ 5hlra}6, two)f}3-v P6Gr03)" lead manganese antimonate l}r.[xFb( Mn: two Sb2 move 03-y Y6TiD3 one two F62rD3 ); etc. In addition to using lead-containing compounds as the third component, there are also non-lead compounds. There are many types of two- and ternary piezoelectric ceramics such as A+'B-5 or A"B"Cl Jing-. On the basis of the three components, the fourth or more APf l3} compounds are added to form quaternary or multi-component piezoelectric ceramics. Its use is very general. It can be used to make loudspeakers, filters, transformers, ultrasonic delay lines, high-power underwater acoustic emission and reception, high-voltage generating components, etc.

Structural ceramics Powder molding has relatively high hardness. The molds are divided into upper molds, lower molds, and concave molds. Some products with holes require mandrels. In order to improve the service life and product consistency, tungsten steel should be used as much as possible for the working parts of the concave mold and the core rod. The upper and lower molds are simple in shape and can also be used for products with large output. If the shape is too complicated, especially on the end of the mold Complex, try to choose mold steel for easy processing. Electronic ceramics Powder molding, according to different products, the compaction density will be different, most of the small products are solid small discs, and most of the 20-station rotary presses are used. The mold structure is: upper mold, lower mold, and concave mold; Pay attention to the fit clearance when making, if the clearance is not suitable, it will cause delamination and missing corners. Large ring-shaped electronic ceramics will be pressed by a nine-station rotary press. The mold structure is: upper mold, lower mold, core rod, and concave mold. When making, pay attention to the contour and matching gap of the mold. Purposeedit Ceramic molds are made of plaster, which can be divided into high-strength plaster and ordinary plaster. High-strength gypsum is mainly used in machine press production. Because the machine press has a certain pressure, the plaster mold must be able to withstand a certain impact. Ordinary gypsum is mainly used for grouting and printing blank production, and grouting and printing blanks do

Scientists and technicians have conducted research from many aspects. Among them, the performance of low-temperature ceramic bond is a key factor that affects the memory quality and development of ceramic bond diamond grinding wheels. Therefore, research on low-temperature ceramic bonding agents with excellent properties such as high strength, low temperature, and low expansion coefficient is the focus of research on superhard material ceramic grinding wheels at home and abroad. Tanaka T, Esaki S, Nishida K, etc., by selectively increasing the number and size of pores in the grinding wheel, the self-sharpening properties of the superhard material set grinding wheel can be further improved. Jackson MJ, Barlow N, Mills B control the pore structure in the superhard material ceramic grinding wheel, so that the produced grinding wheel has high bond strength, good grinding efficiency and cooling performance during grinding. Through thermomechanical analysis, Raman spectroscopy and other means, Kuan-Hong Lin, Shih-Feng Peng, Shun-Tiab Lin measured the sintering temperature, sintering atmosphere, and sintering time on the sintering shrinkage rate of superhard ceramic grinding wheels and the burning loss of diamonds. The sintering parameters and grinding characteristics of the vitrified bond diamond grinding wheel are studied. The superhard material ceramic bond formula selected by Russian scholars is mainly based on chemical composition, and boron glass or boron-lead glass system is selected as the theoretical research object. In-depth research has also been conducted on lead-glass bonding agents, but lead is a toxic substance and is easily decomposed at high temperatures. As early as the 1990s, Japanese researchers studied the selection requirements of the grinding wheel concentration and abrasive grain requiremen

The obvious chemical inertness at high temperature makes the boron nitride coating can be used to protect aluminum, magnesium, zinc alloy and other materials from high temperature oxidation. When the boron nitride coating is coated with refractory Diverse Pcb Ceramic Heat Sink Radiating Substrate Slice materials or ceramic utensils, even when the temperature is as high as 1273K, the boron nitride coating can effectively protect the anti-oxidation. Figure 6 shows a tool coated with boron nitride. The high thermal conductivity of BN has always been keen by scientific researchers, mainly using the high thermal conductivity of nano-h-BN and c-BN to prepare composite materials to accelerate heat dissipation and heat conduction effects. Figure 7 shows the thermal conduction mechanism of boron nitride nanosheet composites. At the same time, it can solve the problem of high resistivity materials needed to avoid short circuits when the thermal conductive material is in contact with the electrical components in operation. BN is more suitable as a thermal conductive material than carbon nanotubes. By blending ultrasonically stripped two-dimensional boron nitride nanosheets and one-dimensional cellulose nanofibers, the thermal conductivity of the prepared composite material is as high as 180W/(m·K), which is the nanocomposite material with the highest thermal conductivity so far. Effective removal of oil, organic solvents and dyes in water is a global water resource protection issue. It is urgent to develop advanced adsorbent materials with excellent adsorption capacity. Using boron trioxide and guanidine hydrochloride as raw materials, heating at 1100°C under N2/H2 mixed carrier gas for 2 hours. The specific surface area of the synthesized boron nitride nanosheets is as high as 1427m2/g. As shown in Figure 8, its ability to adsorb ethanol, toluene, oil and other pollutants in water significantly exceeds that of commonly used adsorption materials