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:
Nov. 23, 2010
Filed:
Oct. 14, 2008
Hideaki Sone, Tokyo, JP;
Masakazu Hirose, Tokyo, JP;
Tomohisa Azuma, Tokyo, JP;
Hideya Sakamoto, Tokyo, JP;
Hideaki Sone, Tokyo, JP;
Masakazu Hirose, Tokyo, JP;
Tomohisa Azuma, Tokyo, JP;
Hideya Sakamoto, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
Provided is a piezoelectric ceramic composition which enables the attainment of sufficiently high Qand good temperature characteristics of oscillation frequency Fwhen applied in an oscillator utilizing third harmonic mode of thickness longitudinal vibration. The piezoelectric ceramic composition contains a composite oxide having a perovskite structure. The composite oxide has a composition expressed by the chemical formula (1), while satisfying 0.91≦α≦1.00, 0<β≦0.08, 0.125≦x≦0.300, 0.020≦y≦0.050, and 0.040≦z≦0.070(PbLn)(TiZrMnNb)O  (1)where Ln signifies at least one element selected from the group consisting of La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu.