专利名称：Piezoelectric ceramic composition发明人：Tadashi Takenaka,Masakazu Hirose,Kazuo
Miyabe
申请号：US09/263783申请日：19990305公开号：US06080327A公开日：20000627
摘要：A lead-oxide-free piezoelectric ceramic composition having an
electromechanical coupling coefficient greater than a predetermined value and having aCurie point of at least 500° C., whose main component is a two-component-based solidsolution of the formula of (1- x)Bi.sub.a Ti. sub.b Nb.sub.c O.sub.9 -xNa.sub.p Bi.sub.qNb.sub.r O.sub. 9, and which has a bismuth layer structure in the range of 0 < x < 1, < P>
the solid solution of the above formula satisfying 2.4 < (1-x) a+ xq < 3.1,
0 < b < 1.1,
0.9 < (1-x)c+xr < 2.1, and
0 < p < 0.6.
申请人：TDK CORPORATION
代理机构：Oblon, Spivak, McClelland, Maier & Neustadt, P
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