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Item | Unit | 95 Al2O3 | 99 Al2O3 | ZrO2 |
Heat Resistance | ℃ | 1500 | 1700 | 1400 |
Bulk Density | g/cm3 | 3.6 | 3.9 | 6.05 |
Water Absorption | % | 0 | 0 | 0 |
Flexural Strength | Mpa | 300 | 400 | 1100 |
Compressive Strength | Mpa | 2500 | 2800 | 3600 |
Vickers Hardness | - | 1500 | 1700 | 1300 |
Rockwell Hardness | - | ≥85 | ≥89 | ≥83 |
Elastic Modulus | Gpa | 280 | 370 | 200 |
Poisson’s Ratio | - | 0.22 | 0.23 | 0.31 |
Linear Expansion Coefficient | (20-5000℃) 10-6/℃ | 7.1 | 8 | 10 |
Thermal Conductivity | W/(M.K) | 16 | 32 | 2.5 |
Specific Heat | ×10-3J/(KG.K) | 0.78 | 0.9 | 0.5 |
Dielectric Constant(1MHZ) | - | 9 | 9.9 | N.A. |
Dielectric Loss Angle | ×10-4 | 15 | 1 | N.A. |
Dielectric Strength | ×106V/m | 12 | 15 | N.A. |








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