Potassium Fluoroaluminate Product Description CAS#14484-69-6

Potassium fluoroaluminate, also known as potassium tetrafluoroaluminate, potassium aluminum fluoride, or potassium cryolite, has the chemical name (1-)potassium tetrafluoroaluminate. Its molecular formula is KAlF₄, and its molecular weight is 142.07. It is a white or light gray crystalline powder at room temperature. Its melting point is 560–580°C. In terms of solubility, potassium fluoroaluminate is slightly soluble in water; at 0°C, 0.8g dissolves in 1000g of water, at 25°C, 1.42g dissolves, and at 100°C, 4.58g dissolves. Industrially, potassium fluoroaluminate is mainly prepared by synthesis: anhydrous hydrofluoric acid reacts with aluminum hydroxide to produce fluoroaluminic acid, which is then reacted with potassium hydroxide at high temperature. The mixture is then filtered, dried, melted, and crushed to obtain the final product. Alternatively, it can be synthesized by reacting aluminum fluoride, ammonium fluoride, and potassium chloride. Potassium fluoroaluminate possesses high thermal stability and a unique fluoroaluminate structure, making it valuable for applications in various fields such as brazing, metallurgy, ceramics, glass, friction materials, and pesticides.

Potassium fluoroaluminate Product Applications CAS#14484-69-6

Potassium fluoroaluminate is an important inorganic fluoride salt and functional material, widely used in brazing, metallurgy, ceramics, glass, friction materials, and pesticides, among other industries.

In the brazing and welding industry, potassium fluoroaluminate is an important flux for brazing aluminum, aluminum alloys, and stainless steel. It effectively removes oxide films from metal surfaces, improves the wettability and spreadability of liquid brazing filler metal to the base material, and enhances weld quality. Potassium fluoroaluminate flux is non-hygroscopic and non-corrosive, and is widely used in the brazing of aluminum and aluminum alloys. It is also used as a flux for hot welding and brazing.

In the metallurgical industry, potassium fluoroaluminate is used as a deoxidizer and flux in the aluminum alloy production process. Its use as a flux in secondary aluminum smelting maximizes metal recovery and removes magnesium from liquid aluminum alloys. It can also be used as a raw material for producing aluminum-magnesium casting boron-containing alloys.