Calcium borate
Calcium borate is a borate salt of calcium with the molecular formula Ca32. It can be prepared by reacting calcium metal with boric acid. The resulting precipitate is calcium borate. A hydrated form occurs naturally as the minerals colemanite, nobleite and priceite.
Use
Calcium borate is used as a binder in some grades of hexagonal boron nitride for hot pressing.Other uses include as a flame retardant in epoxy molding compounds, a ceramic flux in some ceramic glazes, reactive self-sealing binders in hazardous waste management, additive for insect-resistant polystyrene, fertilizer, and in the production of boron glasses.
It is used as a main source of boron oxide in the manufacturing of ceramic frits used in ceramic glaze or ceramic engobe for wall and floor ceramic tiles.