Production manner of the mixed powder which consists of the exotic powdered metal and the oxide powder and the mixed powder which consists of the exotic powdered metal and the oxide powder

摘要

At the time of producing the mixed powder of the exotic powdered metal and the oxide powder, it is production manner of the mixed powder which consists of the exotic powdered metal and the oxide powder where it mixes with the powder and the oxide powder of the ammonium chloride salt of the precious metal, next roast this mixed powder, desorption ammonium chloride with this roasting, obtain the mixed powder of the exotic powdered metal and the oxide powder and under chlorine 1000ppm and under nitrogen 1000ppm, 90% or more of grain size of the exotic powdered metal 20 millimicrons or less, the mixed powder which consists of the exotic powdered metal and the oxide powder where 90% or more of grain size of the oxide powder is 12 millimicrons or less. In order for the nitrogen which participates in chlorine and the hydrazine reduction reaction which avoid the process where exotic powdered metal production overlaps, are included in aqua regia not to enter to the utmost, it is something which abbreviates process. As a result, abbreviating the dry process at high temperature, it prevents grain growth and cohesion, furthermore loses comminution and classification process, it designates that production cost is made to decrease considerably as topic.