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Limestone vs. High-alumina Refractory

Limestone belongs to the natural stone classification, while high-alumina refractory belongs to the oxide-based engineering ceramics. There are 6 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

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

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 2.6
2.1
Maximum Temperature: Mechanical, °C 360
1200
Specific Heat Capacity, J/kg-K 920
800
Thermal Conductivity, W/m-K 2.1
1.5
Thermal Diffusivity, mm2/s 0.88
0.87
Thermal Expansion, µm/m-K 8.0
4.3