Ceramic Properties - Quartz (GE124)
The applications for quartz are endless where optical clarity, chemical and thermal resistance and insulation, and hardness are required. Quartz ceramic parts are commonly used in the semiconductor world and the lighting industry.
Properties Units Test Value Physical Chemical Formula SiO2 Density, r g/cm3 ASTM C20 2.21 Color white/ transparent Crystal Structure hexagonal Water Absorption % @R.T. ASTM C373 0.0 Hardness Moh's 7 Hardness knoop (kg/mm2) Knoop 100g > 600 Mechanical Compressive Strength MPa @ R.T. ASTM C773 650 - 1100 Tensile Strength MPa @ R.T. ACMA Test #4 48 Modulus of Elasticity
GPa ASTM C848 70 Flexural Strength (MOR) MPa @ R.T. ASTM F417 80 Poisson's Ratio, u ASTM C818 0.17 Fracture Toughness, KIc MPa x m1/2 Notched Beam Test -- Thermal Max. Use Temperature
(* denotes inert atm.)
C No load cond. 1200 Thermal Shock Resistance DT (C) Quenching > 1400 Thermal Conductivity W/m-K @ R.T. ASTM C408 1.4 Coefficient of Linear Thermal Expansion, al mm/m-C (~25C through 1000C) ASTM C372 0.45 Specific Heat, cp cal/g-C @ R.T. ASTM C351 0.16 Electrical Dielectric Constant 1MHz @ R.T. ASTM D150 3.8 Dielectric Strength kV/mm ASTM D116 25 - 40 Electrical Resistivity Wcm @ R.T. ASTM D1829 6 x 1010
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