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Ceramic Properties - Steatite L-5
This material has applications where insulating and temperature resistance are a concern. Many insulators and other standoffs are made of Steatite. The cost of this material is relatively low when compared with other ceramic materials.
Properties Units Test Value Physical Chemical Formula H2Mg3(SiO3)4 Density, r g/cm3 ASTM C20 2.71 Color buff Crystal Structure hexagonal Water Absorption % @R.T. ASTM C373 0.0 - 0.02 Hardness Moh's 7.5 Hardness knoop (kg/mm2) Knoop 100g -- Mechanical Compressive Strength MPa @ R.T. ASTM C773 621 Tensile Strength MPa @ R.T. ACMA Test #4 62 Modulus of Elasticity
(Young's Mod.)GPa ASTM C848 138 Flexural Strength (MOR) MPa @ R.T. ASTM F417 140 Poisson's Ratio, u ASTM C818 -- Fracture Toughness, KIc MPa x m1/2 Notched Beam Test -- Thermal Max. Use Temperature
(* denotes inert atm.)C No load cond. 1425 Thermal Shock Resistance DT (C) Quenching 190 Thermal Conductivity W/m-K @ R.T. ASTM C408 2.9 Coefficient of Linear Thermal Expansion, al mm/m-C (~25C through 1000C) ASTM C372 7.0 Specific Heat, cp cal/g-C @ R.T. ASTM C351 0.22 Electrical Dielectric Constant 1MHz @ R.T. ASTM D150 6.3 Dielectric Strength kV/mm ASTM D116 9.3 Electrical Resistivity Wcm @ R.T. ASTM D1829 104
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