| Alumina |
Designation |
Dense AL-95 |
Dense AL-96 |
Dense AL-97 |
Dense AL99.5 |
Dense AL99.8 |
 |
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| % Alumina | % Al2O3 | 95 | 96 | 97 | 99.5 | 99.8 |
| Color | Cream | White or Pink | White or Pink | White | Cream - White | |
| Hardness | Mohs | 9 | 9 | 9 | 9 | 9 |
| Water Absorption | % | Imperv | Imperv | Imperv | Imperv | Imperv |
| Specific Gravity | 3.65 | 3.65 | 3.75 | 3.85 | 3.92 | |
| Crystal Spec | Micron | 5-40 | 5-30 | 5-20 | 5-25 | 5-25 |
| Tensile Strength | PSI | 20,000 | 19,000 | 22,000 | 25,000 | 25,000 |
| Compressive Strength | PSI | 320,000 | 300,000 | 350,000 | 375,000 | 375,000 |
| Flexural Strength | PSI | 41,000 | 45,000 | 43,000 | 45,000 | 45,000 |
| Maximum Operating Temperature Under Non Loading Conditions | °C | 1,650 | 1,700 | 1,700 | 1,675 | 1,675 |
| °F | 3,000 | 3,100 | 3,100 | 3,050 | 3,050 | |
| Linear Coefficient of Thermal Expansion: | (@ 25 °C - 100 °C) x 10-6/°C | 5.8 | 6.4 | 6.4 | 6.4 | 6.4 |
| (@ 25°C - 600 °C) x 10-6/°C | 7.4 | 7.5 | 7.4 | 7.8 | 8.0 | |
| Dielectric Strength (1/4" thick) | VOLTS/MIL | 210 | 220 | 230 | 230 | 230 |
| Dielectric Constant | At 25 °C & 1 mhz | 9.2 | 9.3 | 9.3 | 9.7 | 9.8 |
| Loss Factor | At 25 °C & 1 mhz | .004 | .006 | .004 | .003 | .003 |
| Te Value | Temp °C @ which one cm3 of material has a mega ohm of resistance | 840 | 840 | 940 | 1000 | 1050 |
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