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Place of Origin
HS-CODE
25-
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Detailed Description
The manufacture of ceramics is the oldest, and probably best known, application for kaolin. China clay has been used to produce ceramics for at least four thousand years. Kaolin is used in a very wide range of ceramics including traditional ceramics (whiteware, sanitaryware and tiles), structural clay products, advanced ceramics and catalyst supports.
Kaolin used in ceramics must have a consistent chemical composition so that there are no variations in the firing and vitrifying characteristics of the ceramic body.
One of the most important specifications is the level and type of impuritied present, which can afftct the color of the fired ceramic body. The main impurity often present that can cause this problem is iron oxide but significant contents of copper, chrome and manganese are also undesirable
Calcined kaolin is mainly used as material of body and glaze for household china pottery and porcelain for daily use, architectural ceramics, chemical industrial anticorrosion ceramics, arts and handicrafts ceramics, pottery and porcelain ware for toilet sanitary ceramics, high and low tension ceramics and all kinds of glazed tile. It have high fire-resistance rating, strong plasticity and good bonding property. Besides, it has good whiteness, compactness, good surface smoothness, high mechanical strength, high rate of finished products.
GB-CK80 kaolin is produced through grind, calcination and classification. The well controlled processes ensure the product have no coarse particles, so the end user can achieve a high Hegman grind. The product also have high brightness, good hiding power and superior dispersibility, and it is widely applied in ceramice, rubber, and plastic.
Typical Physical Properties:
Brightness(T457): 90-92% min
Particle Size (-325mesh): 0-45micron 90%min
Refractivity: 1.62
Oil Absorbency (g/100g): 20-30
PH: 5.5-7.0
Density (kg/m3): 2600
Bulk Density (kg/m3): 1000
Moisure (%): 0.8 max
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