Silicon

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Silicon

Silicon Properties
Silicon is frequently used in semiconductor applications. Single crystal silicon is anisotropic in nature. Dopants, crystallographic direction, purity.

Silicon Properties

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 ceramic.

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 (Young's Mod.)	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.)	ºC	No load cond.	1350
Thermal Shock Resistance	DT (ºC)	Quenching	--
Thermal Conductivity	W/m-K @ R.T.	ASTM C408	125
Coefficient of Linear Thermal Expansion, al	mm/m-ºC (~25ºC through ±1000ºC)	ASTM C372	2.49 - 4.44
Specific Heat, cp	cal/g-ºC @ 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