| 摘要 |
A composition including an aluminosilicate and a flux, where the alumlnosilicate and the flux are calcined to form calcined granules is disclosed. A method including adding a flux to an aluminosilicate to form a mixture and calcining the mixture to form calcined granules is also disclosed. The aluminosilicate may include kaolin and/or chamotte. The flux may include a salt, sodium silicate, or potassium feldspar. The composition may be calcined at a temperature less than about 1300°C. The calcined granules may be coated with a hydrophobic coating. The hydrophobic coating may include a silane or siloxane. The calcined granules may have a hardness greater than 4.5 Mohs. |
