Patent · US Active

Translucent piezoelectric glass ceramic

US7591961B2 · kind B2 · utility

1Cited by

3References

17Claims

0Family size

Assignee

Schott AG · DE

Inventors

Katherine Gudgel · Evanston, US
Peter Blaum · Weiterstadt, DE
Mark J. Davis · Grafton, GB
Paula Vullo · Pittston, US

Key dates

Filing date	Jan 29, 2007
Grant date	Sep 22, 2009
Priority date	—
Expiry date	Jan 29, 2027

Classification

Technology area (CPC H)Electricity
CPC primaryH10N30/852
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A translucent piezoelectric glass ceramic is disclosed. The glass ceramic is prepared from a precursor glass by a ceraming process, using a temperature gradient to effect the precipitation of non-ferroelectric piezo-active crystallites from the precursor glass with a preferred direction of orientation and having an average crystal size of less than 1 micrometer. Alternatively, a translucent piezoelectric glass ceramic comprising ferroelectric crystallites may be prepared by poling. In this case the crystal size is controlled to be smaller than 90 nanometers but preferably larger than 10 nanometers.

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