CONTAINER FOR PRODUCING HIGH-PURITY FINE POWDER OF ACTIVE METAL

摘要

PURPOSE:To allow the pulverization of active metals to the high-purity powder by frosting the moisture in hermetic containers provided with rubber gloves for operation and further converting the moisture to hydroxyl groups by metal Na, than pulverizing the same in an inert gaseous atmosphers at the time of producing the powder of specific active metal which easily forms hydroxide thereof. CONSTITUTION:The plural hermetic containers 2a, 2b, 2c respectively provided with the rubber gloves 3 for operation are connected and the inside of the containers 2a to 2c are evacuated to a vacuum by a discharge system 11 provided to the central container 2b at the time of pulverizing the active metal such as Sr, Ba, Y and Hf which easily forms hydroxide by reacting with water in a high purity state. An inert gas such as Ar is introduced from a gas connecting pipe 28 into the containers. The pressures in and out of the rubber gloves 3 are uniformized by a pressure equalizing means 7 provided to the rubber gloves 3. The residual moisture in the containers is cooled down to <=-150 deg.C by a cryogenic frosting device 29 porovided in the containers 2a to 2c and is thereby frosted. The metal Na is brought into contact with the frost to remove the moisture in the form of NaOH. The inert gaseous atmosphere contg. no moisture is generated in the hermetic containers and the active metals such as Sr are ground in the high-purity state without forming the hydroxide with the moisture.