wearable Silicon Nitride Si3N4 ceramic round rod roller
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Silicon Nitride Ceramic:
The main raw material of graphite crucible is crystalline natural graphite. Therefore, it retains the original physical and chemical properties of natural graphite. Graphite crucible has good thermal conductivity and high temperature resistance. In the process of high temperature use, the thermal expansion coefficient is small, and it has certain strain resistance to rapid heating and rapid cooling. It has strong corrosion resistance to acids and alkaline solutions, and has excellent chemical stability. Graphite crucibles are widely used in the smelting of alloy tool steels and the smelting of non-ferrous metals and their alloys in metallurgy, casting, machinery, chemical and other industrial sectors due to the above-mentioned excellent properties. And has a good technical and economic effect. The silicon carbide crucible is a bowl-shaped container with a ceramic deep bottom. When there is a solid to be heated by a high fire, a crucible must be used. Because it can withstand high temperatures better than glassware. When the crucible is used, it is usually not filled with the molten material to prevent the heated material from jumping out, and to allow the air to enter and exit freely for possible oxidation reactions. Because the bottom of the crucible is very small, it generally needs to be placed on a mud triangle to be directly heated by fire. The crucible can be placed upright or inclined on the iron triangle stand, and it can be placed by itself depending on the needs of the experiment. After the crucible is heated, it should not be placed on a cold metal table immediately to prevent it from cracking due to rapid cooling. Do not put it on the wooden table immediately to avoid scalding the tabletop or causing a fire. The correct method is to leave it on an iron tripod for natural cooling, or place it on an asbestos net to let it cool slowly. Please refer to the crucible tongs for access to the crucible.
properties:
High hardness, high strength, wear resistance, corrosion resistance, high temperature(1200°), good thermal diffusivity, good thermal shock resistance(avoid the temperature changing rapidly), good insulativity, low density. The comprehensive properties are best in most of structure ceramic.
Data Sheet↓
Color: Black Grey
Density: ＞3.2g/cm3
Hardness: HRA90
Vickers Hardness (Hv50): ＞1550 HV0.5
Modulus of Elasticity: 290Gpa
Flexural Strength: ＞600Mpa
Compressive Strength: 2500Mpa
Modulus of Elasticity(25°C): 65Gpa
Fracture toughness:＞6.0 Mpam1/2
Maximum Use Temperature: 1200°C
Thermal Conductivity:15-20 W(m.K)
Thermal Expansion Coefficient: ＞3.1 10-6/°C
Thermal Shock Resistance: 500 △T°C
Special Heat Capacity: 700 KJ/kg.K
Dielectric Strength: 1 KV/mm
Dielectric Constant: er
Volume Resistivity(20°C): 1.0*10(12)Ω.cm
Application industry:
Machinery, electronic, semiconductor, chemical, petroleum, smelt.
Specific application:
Welding shaft, electronic substrate, plunger, nozzle, slide guide, diesel parts, metal molding, shaft wheels etc.
Why Choose Us? 1.12 years of professional production industrial ceramics factory 2.High quality products with low price 3.High precision parts with lowest tolerance 4.Short time for production 5.Has a group of experienced, professional and efficient R&D team 6.Has a good reputation in China and abroad. 7.MOQ is not limited, small quantity is welcome.
8.Vigorous team and good after-sales service
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