The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 22, 2009
Filed:
Jan. 29, 2007
Katherine Ann Gudgel, Evanston, IL (US);
Peter Blaum, Bodenheim, DE;
Mark J. Davis, Clarks Summit, PA (US);
Paula Vullo, Pittston, PA (US);
Katherine Ann Gudgel, Evanston, IL (US);
Peter Blaum, Bodenheim, DE;
Mark J. Davis, Clarks Summit, PA (US);
Paula Vullo, Pittston, PA (US);
Schott AG, Mainz, DE;
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.