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Hydrated Zinc Borates and Their Industrial Use
1AvidChem LLC, Lone Tree, CO 80124 USA. david.schubert@avidchem.com.
Molecules (Basel, Switzerland)
|July 3, 2019
Summary
Zinc borates are key industrial additives. This review covers the history, chemistry, and applications of various hydrated zinc borate phases, highlighting commercial importance and research gaps.
Area of Science:
- Materials Science
- Inorganic Chemistry
Background:
- Zinc borates are vital functional additives in polymers, bio-composites, paints, and ceramics.
- Thirteen hydrated binary zinc borate phases are documented, with significant industrial production of specific compounds.
Purpose of the Study:
- To review the history, chemistry, and applications of hydrated zinc borate phases.
- To identify outstanding problems and future research directions in the field of zinc borates.
Main Methods:
- Literature review of documented hydrated zinc borate phases.
- Analysis of industrial applications and commercial relevance of zinc borates.
Main Results:
- Zn[B3O4(OH)3] (2ZnO∙3B2O3∙3H2O) is the most manufactured hydrated zinc borate, commercially available as 2ZnO∙3B2O3∙3.5H2O.
- Other commercially significant hydrated zinc borates include 4ZnO∙B2O3∙H2O, 3ZnO∙3B2O3∙5H2O, and 2ZnO∙3B2O3∙7H2O.
Conclusions:
- Hydrated zinc borates possess diverse industrial applications.
- Further research is needed to address outstanding challenges and explore new applications for zinc borate phases.
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