산화 카드뮴

용도Cadmium oxide is used as an electroplating chemical, catalyst, component of semiconductors, and starting material for PCV heat stabilizers; in glass and ceramic glazes; for production of cadmium electrodes in storage batteries; and in other applications.

일반 설명Brown crystals or brown amorphous powder. Used as an electroplating chemical and in the manufacture of cadmium electrodes. Is a component of silver alloys, phosphors, semiconductors, glass and ceramic glazes. Formerly used by veterinarians to kill worms and parasites.

생산 방법Cadmium oxide is manufactured commercially by distilling cadmium metal from graphite retort and allowing vapor to react with air.

Cadmium oxide is prepared by the reaction of cadmium vapor with oxygen. The metal is first melted in a steel retort and transported into a heated chamber where it is vaporized. The vapor is reacted with air, and the cadmium oxide formed is collected in a bag house. The particle size of the product depends on the ratio of air to cadmium vapor. The oxide may be further purified and particles of uniform size may be obtained by calcination at low red heat. Cadmium oxide also may be prepared by several other routes starting with various cadmium salts. The compound can be made by thermal decomposition of cadmium carbonate or cadmium hydroxide: CdCO3 → CdO + CO2 Cd(OH)2 → CdO + H2O Similar thermal decomposition of cadmium nitrate or sulfate would yield the oxide. he oxide. Cadmium oxide also may be made by high temperature oxidation of cadmium sulfide: 2CdS + 3O2 → 2CdO + 2SO2 Finely divided oxide may be obtained by pyrolysis of cadmium salts of carboxylic acids, such as cadmium formate or oxalate. (COOH)2Cd → CdO + H2O + 2CO (COO)2Cd → CdO + CO2 + CO