| Title |
Preparation of Silver Powders from Silver Compounds by Electroreduction |
| Authors |
김민석(Min Seuk Kim); 박진태(Jin Tai Park); 손정수(Jeong Soo Sohn) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Electroreduction; Silver compound; Silver powder; Solid-state reaction; Dissolution and Crystallization |
| Abstract |
Preparation of silver powders by electroreduction of silver compounds was investigated. Three types of silver compounds were prepared by precipitation: silver chloride, silver sulfate, and silver phosphate. Almost complete conversion of silver phosphate to silver was verified by X-ray diffraction analysis and inductively coupled plasma spectrometry. The shape of silver phosphate powder was not changed during the reaction, but the size was reduced. Raising the electrolyte temperature, however, increased the solubility of silver phosphate, leading to an appreciable change in the shape of the reduced silver powder. The proposed electroreduction mechanism of silver phosphate is a solidstate reaction, which is affected by dissolution and crystallization under high solubility conditions. |