Patent · US Active

Bearings produced from silicon nitride substances containing sintering additives and SiO2

US7244686B2 · kind B2 · utility

0Cited by

13References

1Claims

0Family size

Assignee

H.C. Starck Ceramics GmbH & Co. KG · DE

Inventors

Gerhard Wotting · Coburg, DE
Mathias Herrmann · Sachsen, DE
Grit Michael · Dresden, DE
Stefan G. Siegel · Pueblo, US
Lutz Frassek · Baumholder, DE

Key dates

Filing date	Oct 19, 2006
Grant date	Jul 17, 2007
Priority date	—
Expiry date	Oct 19, 2026

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B2235/9692
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The present invention is directed to bearings produced from a silicon nitride material. The silicon nitride material consists of a sintering aid selected from the group consisting of Al2O3 and Y2O3, silicon dioxide, and optionally, up to 10 mole %, based on the amount of silicon nitride, of an additive that reacts with silicon nitride, said additive selected from the group consisting of TiO2, WO3, MoO3 and mixtures thereof.

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