Zinc Borate

Name:
Zinc Borate
Detailed information:
Typical composition: zinc oxide 45%, B₂O₃ 34%, may have 20% water of hydration.

Properties:

White, amorphous powder. Zinc borate of composition 3ZnO•2B2O3 has d 3.64, mp 980C. Soluble in dilute acids; slightly soluble in water. Nonflammable.

Derivation:

Interaction of the oxides at 500–1000C or of zinc oxide slurries with solutions of boric acid or borax.

Use:

Medicine, fireproofing textiles, fungistat and mildew inhibitor, flux in ceramics.

See “Firebrake ZB” [U. S. Borax].