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:
Jul. 18, 1995
Filed:
Sep. 16, 1993
Applicant:
Inventors:
Ashvin Srivastava, Bensalem, PA (US);
Amar Bhalla, State College, PA (US);
L Eric Cross, State College, PA (US);
Assignee:
The Penn State Research Foundation, University Park, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22F / ;
U.S. Cl.
CPC ...
419 22 ; 419 10 ; 419 19 ; 419 32 ; 419 46 ;
Abstract
Process for producing novel fluxed PZT dielectric ceramic compositions having sintering temperatures below about 1000.degree., so as to be non-reactive with electrode layers when co-fired therewith. The PZT is sintered with an effective amount of an eutectic mixture of CuO and an oxide of an alkaline earth metal, preferably barium oxide and/or strontium oxide, to reduce the sintering temperature of the PZT composition below about 1000.degree. C. Dopant such as manganese oxide may be added to reduce the dielectric losses.