Difference between revisions of "Cobalt oxide"

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[[File:Cobalt blue-SC8165.jpg|thumb|Chinese style bottle<br>MFA# 1997.182]]
 
== Description ==
 
== Description ==
  

Latest revision as of 12:43, 31 August 2020

Chinese style bottle
MFA# 1997.182

Description

A natural mixture of two or more cobalt oxides. The most common forms of cobalt oxide are: Cobaltous oxide (CoO), Cobaltic oxide (Co2O3), and tricobalt tetroxide (or cobalto-cobaltic oxide, Co3O4). The latter contains cobalt in both valences and comprises up to 40 percent of the commercial cobalt oxide used in the manufacture of ceramics, glass, and enamel and in the preparation of catalysts and cobalt metal powder. Cobalt oxide was used as a blue colorant in ceramic glazes and underglazes since at least the 8th century in the Middle East. It became very popular in the 14th century when it was used for Ming Dynasty ceramics.

Synonyms and Related Terms

oxyde de cobalt (Fr.); óxido de cobalto (Esp., Port.); osido di cobalto (It.)

Examples include: cobaltous oxide; cobaltic oxide; tricobalt tetroxide; cobalto-cobaltic oxide

XRD

PIG513.jpg

SEM

F513sem.jpg

EDS

F513edsbw.jpg

XRF

Slide16 F513.PNG


Risks

Insoluble in water

Resources and Citations

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993