wear resistant spinning textile ceramic yarn roller guide
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Alumina Ceramics:
Alumina castables are widely used in abrasives, heating elements, structural ceramics and refractory materials because of their high hardness, non-conductivity, high temperature resistance and high strength. The Mohs hardness of silicon carbide is 9.5, and the grinding ability of silicon carbide is 0.25~0.28, which is much higher than the grinding ability of corundum (about 0.01). Among them, black silicon carbide has Vickers hardness and Hv=30380~32340MPa, which is brittle and sharp. It is used for materials with low tensile strength, such as gray cast iron, non-ferrous metals, non-metals, and silicon, ceramics, glass, etc. Acid salt material. The silicon carbide castable has higher hardness, HV=31360~33320MPa, strong cutting force, good self-sharpness, but more brittleness. It is used to grind high hardness and brittle materials such as cemented carbide and optical glass. Wait. Silicon carbide is highly conductive and belongs to semiconductors. When the temperature reaches 2000 °C, the conductivity of silicon carbide is comparable to that of graphite. Silicon carbide is often used to make heating elements such as silicon carbon rods and silicon carbon tubes. Silicon carbide has good high temperature resistance. Under normal pressure, the inconsistent melting temperature of silicon carbide is 2760 °C. Up to 625MPa. Silicon carbide has good thermal shock resistance due to its moderately low coefficient of thermal expansion and high thermal conductivity. Therefore, alumina castables are widely used in the manufacture of various ceramic and refractory materials.
properties: High hardness, high strength, wear resistance, corrosion resistance, high temperacture (1600°), good thermal diffusivity, good insulativity, low cost etc.
Data Sheet↓
Color: White/Ivory Density: 3.9g/cm3 Alumina Content: 96% 99% 99.5% Gas permeability: 0 Water Absorption: 0 MONS' Hardness: 82 Vickers Hardness (Hv50): 15.7(1600) Gpa(Kg/mm²) Flexural Strength(20°C): 330Mpa Compressive Strength(20°C): 2000Mpa Fracture Toughness (20°C): 4 MPam1/2 Thermal Conductivity(20°C): 27.5W(m.K) Thermal Expansion Coefficient: 7.6 10-6/°C Thermal Shock Resistance: 200 △T°C
Maximum use temperature 1650°C
Dielectric Strength: ＞10 KV/mm
Dielectric Constant: 9.1er
Dielectric Loss Angle(1MHz): 0.0002-0.0003
Volume Resistivity(20°C): ＞1014Ω.cm
Application industry: Machinery, electronic, chemical, petroleum etc. Specific application: Electrical ceramic substrate, plunger, sealing ring etc.
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