ã€China Aluminum Network】 Introduction Alumina hollow spheres are made of alumina hollow spheres and alumina powder, combined with other binders, and fired at 1750 degrees Celsius. It is a kind of ultra-high temperature material energy-saving insulation material.
Performance Al2O3 alumina hollow ball content is not less than 98%, SiO2 content is not more than 0.5%, Fe2O3 content is not more than easy 0.2%, bulk density 1.3 ~ 1.4g/cm3, apparent porosity 60% ~ 80%, compressive strength of not less than 9.8MPa, load (0.2MPa) soft helium temperature of not less than 1700 °C, thermal conductivity of 0.7 ~ 0.8W / (m? K).
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