CALCINED KAOLIN
We offer Calcined Kaolin, which is a hydrous, thermally structured aluminium silicate produced by heating ultrafine natural kaolin at a very high temperature. The calcination process changes the shape of kaolin particles and increases its hardness. During the calcination process of Kaolin, dehydroxylation occurs and leads to the formation of METAKAOLIN, a highly reactive substance.
When Kaolin is completely calcined, it leads to forming an amorphous defect spinal structure, which helps contribute opacity to end-product application. It is used to replace and substitute TiO2 from 15 to 25% in several applications. In addition, it has a low surface hydroxyl content which leads to low moisture pick up. Therefore, it performs excellently in water-sensitive applications.
Whitegold Minerals offer Calcined Kaolin, a hydrous, thermally structured Aluminium Silicate produced by heating ultrafine natural Kaolin at very high temperatures.
Packing Size: 25kg
Calcination alters the color of the powder, making it more chemically inert. It is used in many products and industries. However, it is often underutilized in traditional pottery. Kaolin, a pure clay mineral, contains 1 part Al2O3 & 2 SiO2 in the burned chemistry. The hydrated raw clay crystals are 12 per cent crystal-bound with water, which is how they are so flexible. As a result, Kaolin is an excellent source of Al2O3, which helps to chemistry the vast majority of glazes.
Calcined Kaolin can be used in a wide variety of ceramics applications. It is brittle and softens around cone 35. As a result, it is an excellent choice for investment casting, refractory castings, furnishings, thermal insulation, low expansion bodies, permeable compositions of ceramics, and investment castables.
Calcined Kaolins can also adjust the shrinkage or plasticity of slips used on wet, leather-hard, or dry ware. Engobes are more clay-rich than glazes, so it is essential to control drying shrinkage. They are used to replace raw Kaolin to maintain burned characteristics and fine-tune drying.
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RUBBER
| PARTICULARS | UNITS | RESULTS |
|---|---|---|
| BaSO4 | % | 98.5 + |
| Dry Whiteness (ISO.7724) | % | 98.5 + |
| Specific Gravity | g/m³ | 4.2 |
| Oil Absorbtion | gm/ml | 15 |
| Moisture | % | < 0.15 |
| pH | 7-8 |