METHOD FOR PRODUCING A metal porous cathode made of tungsten powder

摘要

method u0438u0437u0433u043eu0442u043eu0432u043bu0435u043du0438u00a0 u043cu0435u0442u0430u043bu043bu043eu043fu043eu0440u0438u0441u0442u044bu0445 u043au0430u0442u043eu0434u043eu0432 of u0432u043eu043bu044cu0444u0440u0430u043cu043eu0432u043eu0433u043e powder, including the annealing source powder within a temperature range from 1650 to 1750u0441 with u043fu043eu0434u044au0435 iom temperature to 25 between, u0440u0430u0437u043cu0430u043bu044bu0432u0430u043du0438u0435 speca, quality control of powder after each step of annealing by u043eu043fu0440u0435u0434u0435u043bu0435u043du0438u00a0 average particle diameter powder Du0447 who should be not less than the second stage annealing after more than 4.5 microns.that's the equivalent of u0437u043du0430u0447u0435u043du0438u00a0u043c u043fu0440u043eu0442u0435u043au0430u043du0438u00a0 air u04400,45 kg / cm2 on the pill, u0441u043fu0440u0435u0441u0441u043eu0432u0430u043du043du044bu0445 with rud = 2.8 m / cm2, the extrusion of the obtained powder, pills, sintering them in beh u0437u043eu043au0438u0441u043bu0438u0442u0435u043bu044cu043du043eu0439 environment and u043fu0440u043eu043fu0438u0442u043au0443 sintered pellets u044du043cu0438u0441u0441u0438u043eu043du043du043e - active substance, u043eu0442u043bu0438u0447u0430u044eu0449u0438u0439u0441u00a0, average diameter of particle of powder u0438u0437u043cu0435u0440u00a0u044eu0442 on device type fisher "Du0447u0444 and according to the ratio between the u0437u043du0430u0447u0435u043du0438u00a0u043cu0438 Du0447 and Du0447u0444,equal Du0447 = Du0447u0444 - 1, the annealing u043fu0440u043eu0432u043eu0434u00a0u0442 to u043fu043eu043bu0443u0447u0435u043du0438u00a0 average diameter particles of not less than 5.5 microns, but not more than 8.0 microns, counting interval density u0441u043fu0435u0447u0435 u043du043du044bu0445 pills gao min - max on u0443u0440u0430u0432u043du0435u043du0438u00a0u043c sp;where the value of gao min, g / cm3, u0443u0434u043eu0432u043bu0435u0442u0432u043eu0440u00a0u0435u0442 condition u043du0430u043bu0438u0447u0438u00a0 tablets minimum open u043fu0435u0440u043eu0432u043eu0433u043e channel from its optimal value of about u0434u043bu00a0 interval production, and sp - g / cm3, the condition u043du0430u043bu0438u0447u0438u00a0 tablets maximum open u043fu0435u0440u043eu0432u043eu0433u043e channel and reference dependence of density of sintered pellets of u0443u0434u0435u043bu044c the main u0434u0430u0432u043bu0435u043du0438u00a0 u043fu0440u0435u0441u0441u043eu0432u0430u043du0438u00a0 sp = f (ores)where the density is equal to the weight of the pills to its volume target pressure u043fu0440u0435u0441u0441u043eu0432u0430u043du0438u00a0 on u0437u043du0430u0447u0435u043du0438u00a0u043c gao gao min and max.