Alumina ceramic is a type of ceramic material mainly composed of aluminum oxide (AI2O3), used as an insulating material for electrical components. Alumina ceramic has good conductivity, mechanical strength, and high-temperature resistance. Its characteristics make it one of the most widely used ceramics in structural, wear, and corrosive environments.
1. High hardness
Rockwell hardness is HRA80-90, the hardness is lower than diamond, far more than the wear resistance of wear-resistant steel and stainless steel.
2. Excellent wear resistance
Measured by professional research institutions, its wear resistance is equivalent to 266 times of manganese steel. Gaoming cast iron 171.5 times, according to our more than ten years of customer tracking survey, under the same working conditions, can extend the service life of the equipment at least ten times more.
3. Light weight
Its density of 3.5g/cm3 is only half that of steel, which can greatly reduce equipment load.
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技术参数(Technical Parameters) |
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项目(Project) |
单位(Unit) |
数值(Numerical value) |
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材料(Material) |
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Al2O3>99.5% |
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颜色(Colour) |
|
白色,象牙色(White,Ivory) |
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密度(Density) |
g/cm3 |
3.92 |
|
抗弯强度(Flexural Strength) |
MPa |
350 |
|
抗压强度(Compressive Strength) |
MPa |
2,450 |
|
杨氏模量(Young's Modulus) |
GPa |
360 |
|
抗冲击强度(Impact Strength) |
MPa m1/2 |
4-5 |
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维泊尔系数(Weibull Coefficient) |
m |
10 |
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维氏硬度(Vickers Hardness) |
HV 0.5 |
1,800 |
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热膨胀系数(Thermal Expansion Coefficient) |
10-6K-1 |
8.2 |
|
导热系数(Thermal Conductivity) |
W/mk |
30 |
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热震稳定性(Thermal Shock Stability) |
∆T °C |
220 |
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最高使用温度(Maximum Use Temperature) |
°C |
1,600 |
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20°C体积电阻(20°C Volume Resistivity) |
Ωcm |
>1015 |
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电介质强度(Dielectric Strength) |
kV/mm |
17 |
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介电常数(Dielectric Constant) |
εr |
9.8 |
