CHEMICAL CONVERSION BODY FOR NIOBIUM CAPACITOR POSITIVE ELECTRODE, AND PRODUCTION METHOD THEREFOR
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United States of America Patent
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Dec 10, 2015
app pub date -
Dec 26, 2013
filing date -
Dec 27, 2012
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Abstract
A chemical conversion body obtained from a niobium granulated product being porous and having high binding strength, an electrolytic capacitor including the chemical conversion body and a production method thereof. The capacitor includes a chemical conversion body which has a dielectric layer on its surface and a metal element other than niobium distributed therein so that the metal element surrounds niobium; and a cathode formed on the dielectric layer on the surface of the chemical conversion body. The chemical conversion body is produced by mixing niobium hydride and a compound containing a metal element other than niobium; and subjecting the mixture to heat treatment at a temperature higher than a diffusion starting temperature of the compound containing a metal element other than niobium to obtain a niobium granulated product; sintering the granulated product; and subjecting the sintered body to electrolytic oxidation to form a dielectric layer on its surface.
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