A process for preparing tantalum powder and/or niobium powder having high specific surface area

This invention discloses a process for preparing tantalum powder and/or niobium powder having high specific surface area. The process is carried out by reducing the oxides of tantalum and/or niobium, in which at least one halide selected from the group consisting of halides of Mg, Ca, Sr, Ba, and Ce...

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Bibliographic Details
Main Authors XINGBANG LI, LUNTAO PAN, XIAOLI WEN, JILIN HE, NINGFENG YUAN
Format Patent
LanguageEnglish
Published 16.06.2004
Edition7
Subjects
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
MANUFACTURE OF IRON OR STEEL
METALLURGY
METALLURGY OF IRON
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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Summary:This invention discloses a process for preparing tantalum powder and/or niobium powder having high specific surface area. The process is carried out by reducing the oxides of tantalum and/or niobium, in which at least one halide selected from the group consisting of halides of Mg, Ca, Sr, Ba, and Ce reacts with an alkali metal and the said oxides of tantalum and/or niobium at a sufficiently high temperature. The process of this invention is simple, while the tantalum powder and/or niobium powder obtained has a high specific surface area, high purity, and good fluidity. Therefore, this process is particularly suitable for making capacitors and anodes.
Bibliography:Application Number: GB20040007844