Synthetic aluminum silicate powder is manufactured through chemical processes. The sol – gel method, for instance, involves reacting aluminum salts (e.g., aluminum nitrate) with silicon – containing precursors (such as tetraethyl orthosilicate) in an aqueous solution. This reaction forms a gel, which is then dried and calcined at high temperatures (800 – 1200°C) to produce fine – grained powder. Hydrothermal synthesis is another approach, where raw materials react under high pressure and temperature in water, enabling precise control over particle size and morphology.

Aluminum silicate powder exhibits exceptional thermal stability, with a melting point exceeding 1600°C, making it suitable for high – temperature applications. Its high chemical resistance resists corrosion from most acids and alkalis, while its low thermal conductivity provides excellent insulation. The powder’s particle size, ranging from sub – micrometer to several micrometers, influences its reactivity and dispersibility. Surface – modified variants, treated with silanes or polymers, enhance compatibility with other materials.

In ceramics, it serves as a key ingredient in porcelain, stoneware, and refractories, improving mechanical strength and reducing thermal expansion. For example, in kiln linings, aluminum silicate – based refractories withstand temperatures up to 1800°C. In paper manufacturing, it functions as a coating pigment, enhancing brightness, opacity, and printability. The cosmetics industry uses it as a filler in powders and creams, providing a smooth texture and oil – absorbing properties.​