What is the hardness of corundum refractory bricks?
Corundum refractory brick has good stability against acid and alkaline slag, metal and glass solution. It can be used in oxidizing atmosphere at high temperature or in a reductive atmosphere. The basic material of corundum refractory brick is fused alumina or sintered corundum.
Al2O3 containing more than 90% greater than the refractory brick called corundum refractory brick, also known as pure alumina refractory products. Corundum has a high hardness (9 Mohs hardness) and a high melting point. These are closely related to the firmness of the Al - 0 bond in the structure. Therefore, a-Al2O3 is the main phase of making high temperature refractory bricks and high temperature electrical insulating materials.
Such as zirconium corundum refractory brick, chrome corundum refractory titanium corundum refractory brick.
