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Property Content
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Property Values
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SiO2
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99.99%
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Density
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2.2×103 kg/cm³
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Hardness
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5.5 - 6.5 Mohs' Scale 570 KHN 100
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Tensile Strength
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4.8x107 Pa (N/mm2) (7000 psi)
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Compression Strength
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>1.1×109 Pa (160,000 psi)
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Coefficient of Thermal Expansion
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5.5x10-7 cm/cm·°C (20°C-320°C)
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Thermal Conductivity
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1.4 W/m·°C
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Specific Heat
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670 J/kg·°C
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Softening Point
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1730°C (3146°F)
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Annealing Point
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1180°C (2156°F)
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Strain Point
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1075°C (1967°F)
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Electrical Resistivity
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7x107 ohm cm (350°C)
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