Potassium Bromide vs. Forsterite

Potassium bromide belongs to the non-glass optical ceramics classification, while forsterite belongs to the oxide-based engineering ceramics. There are 7 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is potassium bromide and the bottom bar is forsterite.

Potassium Bromide (KBr) Optical Material Forsterite (Mg₂SiO₄)

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Material Properties

Density, g/cm³		2.8
Density, g/cm³		2.1 to 3.1

Dielectric Constant (Relative Permittivity) At 1 MHz		4.9
Dielectric Constant (Relative Permittivity) At 1 MHz		6.2

Electrical Dissipation At 1 MHz		0.00020
Electrical Dissipation At 1 MHz		0.00030

Specific Heat Capacity, J/kg-K		450
Specific Heat Capacity, J/kg-K		850

Thermal Conductivity, W/m-K		4.8
Thermal Conductivity, W/m-K		1.7 to 3.5

Thermal Diffusivity, mm²/s		3.9
Thermal Diffusivity, mm²/s		0.94 to 1.3

Thermal Expansion, µm/m-K		39
Thermal Expansion, µm/m-K		9.0 to 10

Potassium Bromide vs. Forsterite

Material Properties

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