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, 1989
Filed:
Jun. 13, 1988
Applicant:
Inventors:
Assignees:
Sony Corporation, both of, JP;
Narumi China Corporation, both of, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ;
U.S. Cl.
CPC ...
501134 ; 501152 ;
Abstract
There is provided a dielectric porcelain used as dielectric resonator mainly in a microwave range. According to the present invention, 0.1 to 5.3 mol % of one or more of Tb.sub.4 O.sub.7, CeO.sub.2, TeO.sub.2, Gd.sub.2 O.sub.3 and Dy.sub.2 O.sub.3 as additive is admixed to a dielectric material Pb.sub.x Zr.sub.(1-x) O.sub.(2-x) wherein 0.42.ltoreq..ltoreq.0.69 to procure a dielectric constant while keeping the dielectric loss to a lower value and simultaneously controlling temperature characteristics of the dielectric constant, that is, temperature characteristics of the resonant frequency.