Patent · US Active

Lithium-aluminosilicate glass ceramic with high keatite content and structural member made thereof

US7501365B2 · kind B2 · utility

1Cited by

12References

5Claims

0Family size

Assignee

Schott AG · DE

Inventors

Thorsten Doehring · Mainz, DE
Ralf Jedamzik · Griesheim, DE
Hauke Esemann · Wörrstadt, DE
Eva Hoelzel · Ingelheim am Rhein, DE
Ina Mitra · Stadecken-Elsheim, DE

Key dates

Filing date	Aug 3, 2006
Grant date	Mar 10, 2009
Priority date	—
Expiry date	Apr 21, 2027

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC03C10/0027
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A lithium-aluminosilicate glass ceramic is transformed by a suitable heat treatment into a glass ceramic comprising at least 80 vol.-% of keatite mixed crystals. This may be utilized for the preparation of optical or mechanical high-precision parts having a high temperature resistance, a good stability and compatibility with components consisting of metals having a small coefficient of thermal expansion based on nickel and iron, such as Invar®.

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