PIEZOELECTRIC CERAMIC, PIEZOELECTRIC ELEMENT, AND ELECTRONIC APPLIANCE

摘要

A piezoelectric ceramic includes: a metal oxide represented by General Formula (1); and 0.04 parts by weight or more and 0.36 parts by weight or less of Mn and 0.042 parts by weight or more and 0.850 parts by weight or less of Bi on a metal basis relative to 100 parts by weight of the metal oxide, wherein the piezoelectric ceramic includes a plurality of first crystal grains having a perovskite structure, and a plurality of second crystal grains provided at a grain boundary between the first crystal grains and having a crystal structure different from that of the first crystal grain, and the second crystal grain mainly contains at least one metal oxide selected from Ba4Ti12O27 and Ba6Ti17O40.;(Ba1-xCax)a(Ti1-yZry)O3  (1)(where 0.09≦x≦0.30, 0.025≦y≦0.085, 0.986≦a≦1.02)

主权项

1. A piezoelectric ceramic comprising: a metal oxide represented by General Formula (1); and 0.04 parts by weight or more and 0.36 parts by weight or less of Mn and 0.042 parts by weight or more and 0.850 parts by weight or less of Bi on a metal basis relative to 100 parts by weight of the metal oxide, wherein the piezoelectric ceramic includes a plurality of first crystal grains having a perovskite structure, and a plurality of second crystal grains provided, at a grain boundary between the first crystal grains and having a crystal structure different from that of the first crystal grain, and the second crystal grain mainly contains at least one metal oxide selected from Ba4Ti12O27 and Ba6Ti17O40.
(Ba1-xCax)a(Ti1-yZry)O3  (1) (where 0.09≦x≦0.30, 0.025≦y≦0.085, 0.986≦a≦1.02)