Calcined Kaolin Powder 1250/4000/6250 mesh
description1
1250 Mesh
Item |
Specification |
Silicon Dioxide (SiO₂), % |
52.0±2.0 |
Aluminum Oxide (Al₂O₃), % |
44.0±2.0 |
Iron Oxide (Fe₂O₃), % |
≤0.39 |
Titanium Dioxide (TiO₂), % |
≤0.2 |
Calcium Oxide (CaO), % |
≤0.3 |
Magnesium Oxide (MgO), % |
≤0.15 |
Refractive Index |
1.56 |
Oil Absorption (g/100g) |
68-72 |
pH Value |
4.5~5.5 |
Thermal Expansion Coefficient (%), |
8.5×10⁻⁶ |
Whiteness, % |
≥95 |
Residue on 45μm Sieve, % |
≤0.02 |
Fineness (Mesh) |
1250 |
4000Mesh
Item |
4000-mesh Calcined Kaolin |
Whiteness (%) |
≥93.5 |
Particle Size (-2μm %) |
≥78 |
Refractive Index |
1.62 |
Oil Absorption (g/100g) |
60±5 |
Dispersion (μm) |
≤50 |
pH |
6-8 |
Moisture (%) |
≤0.5 |
325-mesh Residue (%) |
≤0.002 |
Average Particle Size (μm) |
≤0.8 |
Silicon Dioxide (SiO₂), % |
52.0±2.0 |
Aluminum Oxide (Al₂O₃), % |
45.0±2.0 |
Iron Oxide (Fe₂O₃), % |
≤0.4 |
Titanium Dioxide (TiO₂), % |
≤1.5 |
Calcium Oxide (CaO), % |
≤0.3 |
Magnesium Oxide (MgO), % |
≤0.2 |
6250 Mesh
Product |
6250 Mesh Calcined Kaolin |
Whiteness (%) |
≥93.5 |
Particle Size (-2um %) |
≥86±2 |
Refractive Index |
1.6 |
Oil Absorption (g/100g) |
60±5 |
Dispersion (um) |
≤55 |
pH |
6-8 |
Moisture |
≤0.5 |
325 Mesh Residue (%) |
≤0.005 |
Silicon Dioxide (SiO₂), % |
52.0±2.0 |
Aluminum Oxide (Al₂O₃), % |
45.0±2.0 |
Iron Oxide (Fe₂O₃), % |
≤0.5 |
Titanium Dioxide (TiO₂), % |
≤1.1 |
Calcium Oxide (CaO), % |
≤0.3 |
Magnesium Oxide (MgO), % |
≤0.2 |
Application
1. Application in Coatings
In architectural coatings, especially latex paints, Yuantai's calcined kaolin products serve as functional additives that can partially replace titanium dioxide, reducing production costs while maintaining excellent coverage. They also help regulate gloss and enhance the mechanical properties of the paint film.
2. Paint Filler
Kaolin is primarily used in paints as a filler and pigment substitute due to its excellent chemical inertness, high coverage, good flowability, and strong suspension properties. It is white in color, has outstanding optical properties, a high oil absorption rate, and a high pigment volume concentration. Additionally, it resists aging and abrasion, offering strong opacity, making it a recommended filler and pigment in the paint industry. It can effectively replace white pigments, particularly titanium dioxide, in paint formulations.
Packaging: 25kg per bag, packed in woven bags with inner plastic lining. Custom packaging is available upon request.