NIOBIUM POWDER, ANODE FOR SOLID ELECTROLYTIC CAPACITOR AND SOLID ELECTROLYTIC CAPACITOR

There is provided a niobium powder to make a capacitor which is small leakage current, also limited leakage current even after application of thermal load, and high capacitance which is attained by enhancing the thermal stability of the niobium oxide coating film in the capacitor. The niobium powder...

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Bibliographic Details
Main Authors EBATO, OSAMU, KIRIHARA, TADASU, SAITO, KAN, SATO, NOBUYUKI
Format Patent
LanguageEnglish
French
German
Published 18.04.2007
Edition7
Subjects
ALLOYS
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
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
WORKING METALLIC POWDER
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Summary:There is provided a niobium powder to make a capacitor which is small leakage current, also limited leakage current even after application of thermal load, and high capacitance which is attained by enhancing the thermal stability of the niobium oxide coating film in the capacitor. The niobium powder includes at least one or more selected from molybdenum: 0.002 to 20% by mass, chromium: 0.002 to 10% by mass, and tungsten: 0.002 to 20% by mass; and hydrogen: 0.005 to 10% by mass, and the specific surface area of the powder is 1 to 10 m /g. It is preferable that the niobium powder further includes magnesium: 0.002 to 1% by mass and aluminum: 0.002 to 1% by mass, and the average particle size of the secondary particles of the niobium powder is from 10 to 200 mu m.
Bibliography:Application Number: EP20030762891