They have stable chemical features and a low rate of water absorption, resist high temperatures and high pressure, and also resist the corrosion of acid, alkali and some other organic solvents. They can stand the change in temperature during the manufacturing process.
|Popular size :|
|Heat resistance up to||1500 ℃|
|Partical density||3.3~3.65 g/cm3|
|Moh’s Hardness (Scale)||7-9|