Method for removing tantalum powder metal impurities

The invention provides a method for removing tantalum powder metal impurities. The method comprises the steps that tantalum powder is contained into a preset open container and put into a vacuum furnace; when the vacuum furnace is vacuumized to a preset pressure, heating is started to raise the temp...

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Bibliographische Detailangaben
1. Verfasser:	CHAI ZHENGWU
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CASTING CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER METALLURGY PERFORMING OPERATIONS POWDER METALLURGY TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	The invention provides a method for removing tantalum powder metal impurities. The method comprises the steps that tantalum powder is contained into a preset open container and put into a vacuum furnace; when the vacuum furnace is vacuumized to a preset pressure, heating is started to raise the temperature to a preset temperature, heat preservation is conducted for preset time so as to melt and volatilize metal impurities in the tantalum powder, and the preset temperature is smaller than the melting point of the tantalum powder and larger than the melting point of the metal impurities; and after heat preservation is conducted for the preset time, when the furnace temperature of the vacuum furnace is reduced to the room temperature, the open container is taken out of the furnace to obtain pure tantalum powder. Therefore, other metal impurities mixed in the tantalum powder can be thoroughly removed, and the quality of the tantalum powder is guaranteed. The problem that in the prior art,in the manner of replacin