| 摘要 |
Germanium hydride is prepared by electrolysis of an aqueous-alkaline solution, containing germanium dioxide in a concentration of from not less than 40 g/l to the solubility limit, at a nickel cathode in a diaphragm cell at a current density of 1.0-1.5 A/ cm<2> and a temperature no higher than 65°C, first passing an electrical current through the aqueous-alkaline solution for the time needed to achieve the minimum possible content of contaminants limiting for germanium hydride. For more thorough purification, the isolated germanium hydride is purified by the membrane method. The technical result is preparation of germanium hydride in which the total content of the contaminants SiH4, AsH3, PH3, H2S, CH4, Fe, Ni, Al, Ca, Mg, etc. is not more than 1<.>10-<6>% - 1<.>10-<7>%, which is acceptable for comparatively wide fields of practical application. The use of the membrane method ensures removal from the germanium hydride of suspended particles with a size of 0.05 µm to a level of less than 5.5<.>10-<3> particles/mole, making it suitable in such fields as, for example, optics and laser engineering. The productivity of the method is 40-50 g/hour. 2 main claims, 8 dependent claims, 1 example. |
