PIEZOELECTRIC MATERIAL, PIEZOELECTRIC ELEMENT, AND ELECTRONIC EQUIPMENT

摘要

To provide a lead-free piezoelectric material having a high and stable piezoelectric constant in a wide operating temperature range. The piezoelectric material contains a perovskite type metal oxide having the general formula (1), Mn, Mg,;(Ba1-xCax)a(Ti1-y-zSnyZrz)O3  (1)(wherein x is in the range of 0.050≦x≦0.200, y is in the range of 0.010≦y≦0.040, and z is in the range of 0≦z≦0.040, provided that x≧0.375(y+z)+0.050, and a is in the range of 0.9925+b≦a≦1.0025+b)wherein the amount b (mol) of Mn on a metal basis per mole of the metal oxide is in the range of 0.0048≦b≦0.0400, and the Mg content on a metal basis per 100 parts by weight of the metal oxide is 0.100 parts by weight or less.

主权项

1. A piezoelectric material, comprising: a perovskite type metal oxide having the following general formula (1); a first auxiliary component Mn; and a second auxiliary component Mg,
wherein the amount b (mol) of Mn on a metal basis per mole of the perovskite type metal oxide is in the range of 0.0048≦b≦0.0400, and the Mg content on a metal basis per 100 parts by weight of the perovskite type metal oxide is 0.100 parts by weight or less (except 0 parts by weight)
(Ba1-xCax)a(Ti1-y-zSnyZrz)O3  (1) (wherein x is in the range of 0.050≦x≦0.200, y is in the range of 0.010≦y≦0.040, and z is in the range of 0≦z≦0.040, provided that x≧0.375(y+z)+0.050, and a is in the range of 0.9925+b≦a≦1.0025+b, provided that b is in the range of 0.0048≦b≦0.0400).