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:
Jan. 18, 2005
Filed:
Jul. 24, 2003
Shigeru Mizuno, Nagoya, JP;
Shigeru Mizuno, Nagoya, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
A piezoelectric ceramic composition comprises a composite perovskite type oxide of Pb(NiNb)Oand simple perovskite type oxides of PbTiOand PbZrOas main components. The composition range of the main components exists in an area surrounded by lines for connecting respective composition points, i.e., a point A (X=40, Y=37, Z=23), a point B (X=36, Y=37, Z=27), a point C (X=33, Y=40, Z=27), and a point D (X=37, Y=40, Z=23) in a triangular coordinate system defined by apexes of Pb(NiNb)O, PbTiO, and PbZrO, provided that Pb(NiNb)Oamounts to X molar %, PbTiOamounts to Y molar %, and PbZrOamounts to Z molar %. The composition makes it possible to realize a large strain amount while suppressing the relative dielectric constant to be low. The composition is preferably usable for an piezoelectric actuator of an ink-jet head.