China clay powder
Used in Paints, Rubber, Detergents and Polymer Industries.
China clay basically is kaolinised feldspar. China clay is highly valued for their whiteness. China Clay is used in manufacturing of porcelain, crockery and paint industry. It is used as filter in paper and textile industry.China clay comes in powder and sand form. It is highly valuable for industrial use.
Physical Properties
China clay is Primary clay and generally found in white colour.
- Casting Rate: High casting rate in slip casting compared to ball clay.
- Particle size: Large particles when compared to Ball clay.
- Green MOR: Modulus of rupture is low compared to ball clay.
- Plasticity: Low plasticity compared to ball clay.
- Refractoriness: High Refractoriness.
Chemical Properties
|
Chemical Formula |
Al2Si2O5(OH)4 |
|
Other Names |
Kaolinite |
|
Color |
White or yellowish-white, earhty mass or white powder |
|
Structure |
Dry powder, semi-dry noodle, or liquid slurry |
|
Hardness (On Moh’s Scale) |
2-2.5 |
|
Specific Gravity |
2.7 - 2.8 |
|
Bulk Density(tapped) gms/cc |
0.65 - 0.75 |
|
pH Balance |
5.5 - 6.5 |
|
Refractive Index |
1.565 |
|
Mesh |
300/400/500 |
|
Relative Density |
1.8 - 2.6 |
|
Water Absorption (% by mass) |
38 -45% |
|
Oil Absorption ml/100 gm |
25-30 |
|
Brightness |
77- 83% |
Chemical Analysis
MgO - 0.50%, Fe2O2 -2.50%, Al2O3 - 37.00% ,SiO2- 44%,Na2O - 0.50%, K2O-1.00% ,L.O.I-12-14%
Uses of China Clay
China clay used in all Kind of ceramic product production and other products for its properties. Following are the primary uses of the china clay :
- China clay is used as filter in paper and textile industry.
- Used as a coating pigment
- China clay is used in manufacturing of porcelain, crockery and paint industry.
- China clay used in Pharmaceuticals and cosmetic industry.
- It is used in varieties of papers, card boards and hard boards.
- China clay (must be free from silica and feldspar) is used for electrical insulators.
- China Clay is used in toothpaste, cosmetic and soap industry.
