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Physico-Mechanical Characteristics |
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| Grade | SPI-Glas™ 10 | SPI-Glas™ 25 | |
| Density, g/cm3 | 1.49 - 1.52 | 1.44 - 1.50 | |
| Open porosity, % | 0.2 - 1 | 1.5 - 2.5 | |
Uptimate strength, MPa: |
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| Bending | 107 - 127 | - | |
| Tensile | 33 - 60 | - | |
| Modulus of elasticity, MPa | 2.53 x104- 2.88x106 | - | |
| Electrical resistivity n-rnrn2/rn | 45 - 50 | 38 - 41 | |
| Thermal conductivity, at 20°C,W/(mîÑ) | 3.7 - 4.1 | 6.4 - 7.8 | |
| Coefficient of thermal expansion at 20-1500 °C,1/°C |
4.4x10-6- 5.1x10-6 | 4.4x10-6- 5.1x10-6 | |
| Gas permeability, cm2/s | 10-12-10-11 | 10-10-10-9 | |
Maximum working temperature, °C: |
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| Inert medium and vacuum | 1300 | 2500 | |
| Air | 400 | 500 | |
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