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:
Aug. 07, 2012
Filed:
Nov. 06, 2008
Shingo Uraki, Tokyo, JP;
Shingo Uraki, Tokyo, JP;
Konica Minolta Holdings, Inc., Tokyo, JP;
Abstract
A droplet ejection head provided with a piezoelectric actuator made by using a KNbO—NaNbOpiezoelectric porcelain composition which exhibits a larger piezoelectric constant than those of conventional ones and does not have any secondary phase transition point in the neighborhood of room temperature (from 10 to 40° C.) and which is suitable for use in the piezoelectric actuator of a droplet ejection head, that is, a droplet ejection head characterized by being provided with a piezoelectric actuator made by using a piezoelectric porcelain composition represented by the general formula: (1−y−z−w)(KNa)NbO+yLiNbO+zSrTiO+wBiFeO, wherein (KNa)NbOrepresents potassium sodium niobate; LiNbOrepresents lithium niobate; SrTiOrepresents strontium titanate; and BiFeOrepresents bismuth ferrate; with the proviso that 0.4<x<0.6, 0<y≦0.1, 0<z<0.1, 0<w<0.09, and 0.03<y+z+w≦0.12.