Honda Electronics Co., Ltd.

Dunzhuo Dong

Kenji Nagareda

A piezoceramic composition comprises, as the main phase, a crystalline phase of a perovskite structure signified as formula ABO, with Element A consisting of one or more elements selected from among K (potassium), Na (sodium) and Li (lithium) and with Element B consisting of one or more elements selected from among Nb (niobium), Ta (tantalum) and Sb (antimony), with Elements A and B comprising other elements as additives. An X-ray diffraction profile of crushed particles of the piezoceramic composition that are 10 &#x3bc;m or less in diameter has a diffraction peak indicating the presence of the main (single) phase as well as a heterogeneous phase of a crystalline structure signified as formula ABO(s&#x3c;t&#x3c;u) but not belonging to the perovskite structure.

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Aichi, Japan

Dunzhuo Dong