| Alumina Content | 80-85% | 90-96% | > 99.5% | 99% | |
| General Application | Lower Cost Electrical & Mechanical | High Strength, Wear Resistant, Electronic, Insulating, Mechanical, Structural & Metalizing | Extremely High Purity, Temperature & Strength; Excellent Corrosion & Wear Resistance | Porous, Easily Degassed & Machinable | |
| Porosity | % | 0-.05 | 0-.05 | 0-.05 | Variable |
| Density | gm/cm 3 | 3.45-3.50 | 3.55-3.75 | 3.75-3.95 | 2.4 |
| Flexural Strength | kpsi | 35.0-40.0 | 40.0-50.0 | 50.0-55.0 | - |
| Comprehensive Strength | kpsi | 260.0 | > 300.0 | > 300.0 | - |
| Tensile Strength | kpsi | 15.0-20.0 | 20.0-28.0 | 20.0-28.0 | - |
| Linear Coefficient of Thermal Expansion |
(cm/cm/°C) 25-300°C 25-700°C |
5.9X10 -6 6.5X10 -6 |
6.3X10 -6 7.0X10 -6 |
6.5X10 -6 7.5X10 -6 |
6.5X10 -6 7.5X10 -6 |
| Dielecctric Constant at 25°C |
1 MH 10 MH |
8.5-8.9 8.4-8.8 |
9.2-9.8 9.0-9.6 |
9.5-9.9 9.3-9.7 |
- |
| Dielectric Strength | Volt/mil | 200 | 225 | 225 | - |
| Te Value |
°F °C |
1472 800 |
> 1832 > 1000 |
> 1832 > 1000 |
> 1832 > 1000 |
| Thermal Conductivity at 25°C | cal/sec/cm 2 /cm/°C | .03-.04 | .04-.06 | .07-.08 | - |
| Thermal Shock | Good | Good | Good | Good | |
|
Safe Use Temperature |
°F °C |
2550 1400 |
3000-3100 1650-1700 |
3275 1800 |
3275 1800 |
| Markets: | North America,South America,Eastern Europe,Southeast Asia,Africa,Oceania,Mid East,Eastern Asia,Western Europe |
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