Ceramic Properties - Silicon
Silicon is frequently used in semiconductor applications. Single crystal silicon is anisotropic in nature. Dopants, crystallographic direction, purity (and resistance) make this a highly versatile design for ceramic parts.
Properties Units Test Value Physical Chemical Formula Si Density, r g/cm3 ASTM C20 2.33 Color gray Crystal Structure cubic Water Absorption % @R.T. ASTM C373 0.0 Hardness Moh's 7 Hardness knoop (kg/mm2) Knoop 100g 1150 Mechanical Compressive Strength MPa @ R.T. ASTM C773 120 Tensile Strength MPa @ R.T. ACMA Test #4 113 Modulus of Elasticity
GPa ASTM C848 112 Flexural Strength (MOR) MPa @ R.T. ASTM F417 ~ 300 Poisson's Ratio, u ASTM C818 0.28 Fracture Toughness, KIc MPa x m1/2 Notched Beam Test 3.0 - 6.0 Thermal Max. Use Temperature
(* denotes inert atm.)
C No load cond. 1350 Thermal Shock Resistance DT (C) Quenching -- Thermal Conductivity W/m-K @ R.T. ASTM C408 125 Coefficient of Linear Thermal Expansion, al mm/m-C (~25C through 1000C) ASTM C372 2.49 - 4.44 Specific Heat, cp cal/g-C @ R.T. ASTM C351 0.18 Electrical Dielectric Constant 1MHz @ R.T. ASTM D150 11.8 Dielectric Strength kV/mm ASTM D116 -- Electrical Resistivity Wcm @ R.T. ASTM D1829 10-3
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