China Wearproof High Temperature Resistance Alumina Ceramic Thermal Insulation Spacer, Find details about China Alumina Ceramic, Alumina Ceramic Spacer from Wearproof High Temperature Resistance Alumina Ceramic Thermal Insulation Spacer
Test Item | Unit | Numerical Value | ||
Product Material | ---- | Alumina | Zirconia | |
Component Content | % | >=99% | >=96% | 90% |
Sintering Temp | ºC | 1780~1800 | 1650~1680 | 1550~1600 |
Specific Gravity | G/cm^3 | >=3.6 | >=3.8 | >=6.0 |
Breakdown Voltage Strength | KV/mm | 15 | 15 | 15 |
Bibulous Rate | % | <0.01 | <0.01 | <0.01 |
Anti Pressure | Mpa | 3700 | 2400 | 5000 |
Hardness | Hra | >=88 | >=82 | >=85 |
Volume Resistance | Cm | >1012 | >1012 | >1012 |
Bending Resistance | Mpa | 400 | 320 | 700 |
Thermal Expansion Coefficient | ---- | 6.8~8 | 6.2~8.5 | 6.9~10 |
Dielectric Constant | MHz | 9.8 | 8.5 | 10 |
Roughness | Ra | <=0.8 | <=0.8 | <=0.8 |
Mirror Polished | ---- | <=0.05 | <=0.1 | <=0.05 |
Thermal Conductivity | W/m-k | 25 | 20 | 25 |
Temprature Resistance | ºC | 1700 | 1600 | 1800 |
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