Patent · US Expired

Tantalum powder, method for producing same powder and sintered anodes obtained from it

US6193779A · kind A · utility

100Cited by

7References

30Claims

0Family size

Assignee

H. C. Starck GmbH & Co. KG · DE

Inventors

Karlheinz Reichert · Wolfenbüttel, DE
Rudiger Wolf · Vienenburg, DE
Christine Rawohl · Hildesheim, DE

Key dates

Filing date	Aug 19, 1999
Grant date	Feb 27, 2001
Priority date	—
Expiry date	Aug 19, 2019

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC22C1/045
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The invention relates a tantalum powder free of alkali and fluorine, which for a relatively small primary particle size has comparatively large secondary particles and is suitable for producing capacitors with a specific charge of between 100,000 and 180,000 .mu.FV/g at specific residual currents of less than 2nA/.mu.FV.

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