Patent · US Active

Method for producing electrolytic capacitors from valve metal powders

US9378894B2 · kind B2 · utility

0Cited by

6References

27Claims

0Family size

Assignee

H.C. STARCK INC. · US

Inventors

Helmut Haas · Achim, DE
Marcel Hagymasi · Goslar, DE
Holger Brumm · Goslar, DE
Christoph Schnitter · Ottersberg, DE

Key dates

Filing date	Aug 8, 2012
Grant date	Jun 28, 2016
Priority date	—
Expiry date	Apr 3, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49204
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A process for producing an anode for an electrolytic capacitor includes pressing a tantalum powder around a tantalum wire, a tantalum ribbon, or a tantalum sheet to form a pressed body. The pressed body is sintered to form a porous sintered body. The porous sintered body is cooled to form a cooled porous sintered body. The cooled porous sintered body is treated with at least one oxidant comprising at least one of a gaseous oxidant and a liquid oxidant to form a treated sintered body. The treated sintered body is anodically oxidized in an electrolyte to form a dielectric layer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.