Kaolin is a clay mineral, part of the group of industrial minerals with the chemical composition Al2Si2O5(OH)4. It is a layered silicate mineral, with one tetrahedral sheet of silica (SiO4) linked through oxygen atoms to one octahedral sheet of alumina (AlO6) octahedra. Rocks that are rich in kaolinite are known as kaolin or china clay.
Many people are under the mistaken impression that the only use for kaolin is in the manufacture of china. This is not true, and its use by the paper industry far exceeds its other uses. However, kaolin still serves as a valuable component in china and other tablewares. Its color, gloss and hardness are ideal characteristics for such products.
Kaolin Powder for Ceramic Industry Standard(GB/T14563-2008)
|1280℃ Burnt Whiteness||≥ 90%||≥ 88%||-||-|
|Residue Rate||≤1% (45μm)||≤1% (45μm)||≤1% (63μm)||≤1% (63μm)|
|Al2O3||≥ 35%||≥ 33%||≥ 32%||≥ 28%|