Fused Silica vs. High-alumina Refractory

Fused silica belongs to the glass and glass-ceramics classification, while high-alumina refractory belongs to the oxide-based engineering ceramics. There are 7 material properties with values for both materials. Properties with values for just one material (20, in this case) are not shown.

For each property being compared, the top bar is fused silica and the bottom bar is high-alumina refractory.

Fused Silica (Fused Quartz)High-Alumina Refractory (IEC 60672 Type C-510)

Metric UnitsUS Customary Units

Material Properties

Density, g/cm³		2.2
Density, g/cm³		2.1

Flexural Strength, MPa		67
Flexural Strength, MPa		28

Maximum Temperature: Mechanical, °C		1080
Maximum Temperature: Mechanical, °C		1200

Specific Heat Capacity, J/kg-K		720
Specific Heat Capacity, J/kg-K		800

Thermal Conductivity, W/m-K		1.4
Thermal Conductivity, W/m-K		1.5

Thermal Diffusivity, mm²/s		0.85
Thermal Diffusivity, mm²/s		0.87

Thermal Expansion, µm/m-K		0.5
Thermal Expansion, µm/m-K		4.3

Fused Silica vs. High-alumina Refractory

Material Properties

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