METHOD FOR PRODUCTION OF SILVER-CADMIUM OXIDE POWDER AND SILVER-CADMIUM OXIDE POWDER PRODUCED BY SPECIFIED METHOD

摘要

FIELD: technological processes; chemistry.;SUBSTANCE: method includes combined deposition of silver and cadmium hydroxides, washing of prepared hydroxides mixture, drying and thermal decomposition. Hydroxides deposition is carried out at the temperature of 15÷30°C with continual mixing from mixture of silver nitrate solution with density of 1.4÷1.45 g/dm³ and cadmium nitrate solution with concentration of 280÷320 g/dm³ and introduction of sodium hydroxide with density of 1.10÷1.20 g/cm³ with the rate of 5÷9 l/min. Moreover, specified solutions are taken in ratio of 1:(0.1÷0.45):(0.28÷0.41) accordingly. Afterwards prepared deposit of hydroxides mixture is separated from solution, deposit is flushed, and thermal decomposition of silver dioxide is carried out in process of silver and cadmium dioxides mixture drying at the temperature of 180÷250°C for 20÷24 hours. Then thermal reduction of silver oxide and thermal decomposition of cadmium dioxide are carried out at the temperature of 450÷540°C for 50÷60 minutes. Silver-cadmium oxide powder is produced by specified method and contains 5÷25 wt % of cadmium oxide.;EFFECT: production of silver-cadmium oxide powder with specified structural and technological characteristics.;12 cl, 1 dwg, 1 ex