Verfahren zur Herstellung von Tantalmetallpulver

1,171,760. Producing tantalum. HERMANN C. STARCK-BERLIN, Jan. 13, 1967 [Feb. 2, 1966], No. 2015/67. Heading C7D. In a process for the preparation of tantalum powder by reducing tantalum oxide with carbon under reduced pressure, the starting material has a carbon excess, the reduction is performed in...

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1. Verfasser:	GUSTAV DAENDLIKER,DR
Format:	Patent
Sprache:	ger
Schlagworte:	BASIC ELECTRIC ELEMENTS CAPACITORS CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE CASTING CHEMISTRY ELECTRICITY FERROUS OR NON-FERROUS ALLOYS MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER METALLURGY PERFORMING OPERATIONS POWDER METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WORKING METALLIC POWDER
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Zusammenfassung:	1,171,760. Producing tantalum. HERMANN C. STARCK-BERLIN, Jan. 13, 1967 [Feb. 2, 1966], No. 2015/67. Heading C7D. In a process for the preparation of tantalum powder by reducing tantalum oxide with carbon under reduced pressure, the starting material has a carbon excess, the reduction is performed in two stages at below 2, 000C. and, between the stages, deficiency of oxygen is made good e.g. by oxidation, by admixing oxygenrich tantalum or by adding tantalum oxide or a tantalum alcoholate. The reduction is preferably effected at 1600- 1850C. Exemplified ways of making good the oxygen deficiency are by heating in oxygen, and impregnating with an ethanol suspension of tantalum oxide or tantalum ethylate. The powder may be sintered to produce capacitor anodes.