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Name | Unit | Steatite | Alumina | Alumina | Zirconia |
Content | % | 95% | 99% | Zirconia | |
Density | g/cm3 | 2.7 | 3.65 | 3.8 | 6 |
Max Tem | °C≥ | 1500 | 1750 | 1050 | |
Hardness (HRA) | 75 | 82 | 88 | 85 | |
Flexural strength | MPa≥ | 200 | 350 | 500 | 1000 |
Elasticity | MPa | 900 | 3400 | 3600 | 5000 |
Water absorption | % | 0 | 0 | 0 | 0 |
Heat expansion | ×10-6/°C(40-800°C) | 6-7.5 | 7.8 | 8 | 11 |
Thermo conductivity | W/m·K( 20°C) | 17 | 18 | 22 | 2.6 |
Thermal Resistance | °C | 200 | 200 | 300 | |
Volume Resistivity | Ω·cm (100°C) | 10¹² | 10¹² | 10¹² | 10¹² |
Dielectric strength | V/m | 10×10^6 | 15×10^6 | 15×10^6 | 11×10^6 |
Dielectric constant | (1MHz) | 6 | 9 | 9.8 | 33 |





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