Valve metal powder doped with boron

US4512805A · kind A · utility

Assignee

• Hermann C. Starck Berlin GmbH & Co. KG · DE

Inventors

• Wolf-Wigand Albrecht · Bad Harzburg, DE
• Uwe Papp · Goslar, DE
• Dieter Behrens

Key dates

• Filing date: Jun 13, 1984
• Grant date: Apr 23, 1985
• Expiry date: Jun 13, 2004

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12042
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A process for the production of valve metal powder, which is doped with boron or boron compounds, for electrolytic capacitors having a low relative leakage current and a high specific charge. The doping with boron or boron compounds in amounts of up to 0.5 percent by weight, relative to the metal content, can take place either during the production of the metal powder or the green valve metal anodes.