Digitalfire Ceramic Oxides Directory

CdO (Cadmium Oxide)

Family	Other
Weight	128.410

MLPT - Melting Point (MP)

> 1500C (From The Oxide Handbook)

Notes

-Cadmium oxide by itself does not produce color in a glaze, but when used in combination with selenium it gives red. In combination with sulfur it produces yellow (great care is required to maintain the correct slightly reducing atmosphere during firing for the latter).

Mechanisms

Glaze Color - Yellow
Cadmium is blended with uranium to produce yellow optical glass and yellow enamels. For example, a yellow stain for enamels can be made with 12% selenium, 64.5% cadmium sulfide, and 23.5% cadmium oxide.
Glaze Color - Red
Red enamels are made using cadmium-selenium-sulfur mixes because this combination goes into solution readily during the short firing period (copper compounds are too slow to dissolve). Great care is required to maintain the correct slightly reducing atmosphere during firing. Cadmium zirconium encapsulated stains are also an option where cadmium by itself is not practical or workable.

Out Bound Links

(Materials - Material source) Cadmium Sulfide - CdS
Greenockite, CdS
(Materials - Material source) Frit - Frit master
Ceramic Frits
(Materials - Material source) Cadmium Oxide - CdO

In Bound Links

(Glossary) Encapsulated Stains
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