Calcium borate

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الموسوعة الحرة

Calcium borate is a borate salt of calcium with the molecular formula Ca3(BO3)2. It can be prepared by reacting calcium metal with boric acid. The resulting precipitate is calcium borate. A hydrated form occurs naturally as the mineralscolemanite[1], nobleite[2] and priceite[3].

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,[4] additive for insect-resistant polystyrene,[5]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.

References

  1. ↑"Colemanite". www.mindat.org. Retrieved 2025-12-14.
  2. ↑"Nobleite". www.mindat.org. Retrieved 2025-12-14.
  3. ↑"Priceite". www.mindat.org. Retrieved 2025-12-14.
  4. ↑Calcium borate binders. (PDF) . Retrieved on 2010-02-08.
  5. ↑Calcium borate infused foam building materials and the like and method of making same - US Patent 6667350 ClaimsArchived 2011-06-12 at the Wayback Machine. Patentstorm.us. Retrieved on 2010-02-08.