electronic Silicon Nitride ceramic threaded pitch bush sleeve
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Silicon Nitride Ceramic:
The molecular formula of calcium hexaboride is CaB6. It is a black-gray powder with a melting point of 2235°C, a relative density (15°C) of 2.33g/cm3, and a hardness (Mohs) of 9. It is insoluble in hydrochloric acid, hydrofluoric acid, and dilute sulfuric acid. It is insoluble in water and can be corroded by oxidants such as chlorine, fluorine, nitric acid and hydrogen peroxide, and reacts very slowly with alkali. At room temperature, it is stable and non-flammable in the air. It has semiconductor properties and neutron absorption properties, and is non-toxic. Boride has the characteristics of high conductivity, high melting point, high hardness and high stability: Boride has relatively high thermal conductivity and strength, so its thermal stability is relatively good. The oxidation resistance of boride at high temperature is based on group IVB metals. Boride is the best. Borides are soluble in molten alkali. Borides of rare earth and alkaline earth metals are not corroded by humid air or dilute hydrochloric acid, but are soluble in nitric acid. Almost all borides have the appearance and properties of metals, high conductivity and positive temperature coefficient of resistance. The borides of Ti, Zr, and Hf have better conductivity than their metals. The creep resistance of borides is very good, which is very important for gas turbines and rockets that require materials to work at high temperatures for a long time, and can maintain strength, resist deformation, resist corrosion, and heat shock. Various alloys or cermets based on borides, carbides, and nitrides can be used to manufacture rocket structural components, aviation equipment components, turbine components, sample holders for high-temperature material testing machines, parts of instruments, bearings, and measurement of high temperature Cone for hardness and some structural parts of nuclear energy device.
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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