Silicon Nitride

Electrically insulating, relatively good corrosion resistance, medium operating temperature (1300 C), structural ceramics, good mechanical characteristics, low thermal expansion, high thermal conductivity, very good thermal shock resistance, low specific weight.

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Technical Parameters

Description	Unit	Value
Material		Si₃N₄
Colour		grey, black
Density	g/cm³	3.2
Flexural Strength	MPa	750
Compressive Strength	MPa	2,500
Modulus of Elasticity (young)	GPa	320
Impact Resistance	MPa m^1/2	6.7
Weibull Modulus	m	15
Vickers Hardness	HV 0.5	1,650
Thermal Expansion Coefficient	10^-6 K^-1	3.4
Thermal Conductivity	W/mK	22
Thermal Shock Resistance	∆T °C	750
Maximum Use Temperature	°C	1,300
Volume Resistivity at 20°C	Ωcm	>10¹¹
Dielectric Strength	kV/mm	20
Dielectric Constant	ε_r	-
Dielectric Loss Angle at 20°C, 1MHz	tanδ	-

These properties were measured on test samples. The values are typical material properties and may vary according to product configuration, geometry and manufacturing process.