precision tolerance Silicon Nitride Si3N4 ceramic bearing sleeve bush
Reputation depends on quality, quality comes from Hard!
Silicon Nitride Ceramic:
Ceramic materials are not easy to oxidize at high temperatures and have good corrosion resistance to acids, alkalis and salts. Ceramic materials also have unique optical properties and can be used as solid-state laser materials, optical fiber materials, optical storage, etc., and transparent ceramics can be used in high-pressure sodium lamps. Magnetic ceramics (ferrites such as MgFe2O4, CuFe2O4, Fe3O4) have a broad future in the application of audio tapes, records, transformer cores, and large computer memory components. The basic ways of heat exchange are: conduction, convection and radiation. In order to effectively dissipate heat, people often achieve this by reducing the thermal resistance of the heat flow path and enhancing the convection coefficient, often neglecting heat radiation. LED lamps generally use natural convection to dissipate heat. The radiator quickly transfers the heat generated by the LED to the surface of the radiator. Due to the low convection coefficient, the heat cannot be dissipated to the surrounding air in time, causing the surface temperature to rise and the working environment of the LED to deteriorate . Increasing the emissivity can effectively take away the heat from the surface of the radiator in the form of heat radiation. Generally, aluminum radiators use anodizing to increase the emissivity of the surface. The ceramic material itself can have high emissivity characteristics without the need for complicated subsequent processing. .
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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FAQ
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A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
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A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.