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Calcined kaolin is a white, powdery mineral produced by the calcination of kaolin clay at high temperatures. This process removes water and impurities, resulting in a fine, high-purity product. Calcined kaolin is known for its excellent brightness, low oil absorption, and high chemical stability, making it a valuable additive in various industrial applications.
| Chemical composition | Al2Si2O5(OH)4 |
| Brightness | Typically above 90% reflectance |
| Particle size | D50 ranging from 1 to 10 microns |
| Moisture content | Less than 1% |
| pH level | Typically between 4.5 and 6.5 |
When selecting calcined kaolin, buyers should consider the intended application and required specifications such as brightness, particle size, and moisture content. It is also important to specify any certifications or grades needed for compliance in specific industries. Quantities should be discussed to ensure supply meets production demands.
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It is primarily used as an additive in ceramics, paints, plastics, and paper.
It is produced by heating kaolin clay to high temperatures to remove moisture and impurities.
It offers high brightness, low oil absorption, and excellent chemical stability.
It is not typically used in food products; check for food-grade certifications if needed.
The D50 particle size usually ranges from 1 to 10 microns.
Yes, it is generally considered environmentally friendly due to its natural origin and non-toxic properties.