US 7,468,143 B2
Piezoelectric ceramic composition and piezoelectric element
Toshikazu Takeda, Omihachiman (Japan)
Assigned to Murata Manufacturing Co., Ltd., Nagaokakyo-Shi (Japan)
Filed on Jan. 22, 2007, as Appl. No. 11/655,857.
Application 11/655857 is a continuation of application No. PCT/JP2005/011723, filed on Jun. 27, 2005.
Claims priority of application No. 2004-238457 (JP), filed on Aug. 18, 2004; and application No. 2005-096121 (JP), filed on Mar. 29, 2005.
Prior Publication US 2007/0131895 A1, Jun. 14, 2007
Int. Cl. H01L 41/187 (2006.01); C04B 35/495 (2006.01)
U.S. Cl. 252—62.9R  [501/134; 310/311; 310/366; 310/365] 19 Claims
OG exemplary drawing
 
1. A piezoelectric ceramic composition comprising a main component represented by the general formula
{(1-n)(Ag1-xLix)m(Nb1-yTay)O3-nX}
in which X is (M1,M2)M3O3 or M4M5O3, M1 represents a trivalent metal element, M2 represents a monovalent metal element, M3 and M5 represent a tetravalent metal element, and M4 represents a divalent metal element, and wherein x, y, m and n are:
0.075≤x<0.40;
0≤y<0.2;
0.98≤m≤1.0; and
0.01≤n≤0.1.