Importance

Loading Importance Indicators...

Abstract

Method of producing Ta powder for tantalum solid electrolytic capacitor capable of stably providing CV value of more than 220 k and to provide the Ta powder and its Ta granulated powder. In method of producing Ta powder by vaporizing TaCl₅ through heating and reducing with H₂ gas, the reduction is performed under conditions that feeding rate of TaCl₅ vapor passing through section area of reaction field of 1 cm² for 1 minute is 0.05˜5.0 g/cm²·min and residence time of TaCl₅ vapor in the reduction reaction field is 0.1˜5 seconds and reduction temperature of TaCl₅ is 1100˜1600° C., whereby Ta powder including a single phase of β-Ta of tetragonal system or mixed phase of β-Ta and α-Ta of cubic system and having average particle size of 30˜150 nm is obtained. Further, Ta granulated powder is obtained by granulating the Ta powder.

Loading the Abstract Image...

First Claim