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:
Jun. 25, 2013
Filed:
Apr. 13, 2006
Kui Yao, Singapore, SG;
Bee Keen Gan, Singapore, SG;
Kui Yao, Singapore, SG;
Bee Keen Gan, Singapore, SG;
Agency for Science, Technology and Research, Singapore, SG;
Abstract
The present invention provides new ferroelectric ceramic materials which can be sintered at a temperature lower than that of the conventional ferroelectric ceramic materials and upon sintering, devices formed of the new ferroelectric ceramic materials possesses excellent piezoelectric properties which are suitable for many industrial applications. The ferroelectric ceramic material includes a composition with a general formula of wPb(NiNb)O-xPb(ZnNb)O-yPb(MgNb)O-zPbZrO-(1−w−x−y−z)PbTiO, in which 0<w<1, 0<x<1, 0≦y<1, 0<z<1, w+x+y+z<1, and 0.5≦w+x+y. A method of preparing a ferroelectric ceramic material includes preparing MgNbO, ZnNbOand NiNbOpowder precursors, mixing the precursors with PbO, TiOand ZrOto form a mixture and calcining the mixture.