PIEZOELECTRIC MATERIAL, PIEZOELECTRIC ELEMENT, AND ELECTRONIC APPARATUS

摘要

A piezoelectric material includes a metal oxide represented by general formula (1) below, a Mn content is 0.04 parts by weight or more and 0.36 parts by weight or less, a Li content α is 0.0013 parts by weight or more and 0.0280 parts by weight or less, a Bi content β is 0.042 parts by weight or more and 0.850 parts by weight or less, and the contents α and β satisfy 0.5≦(α·MB)/(β·ML)≦1 (Ba1-xCax)a(Ti1-y-zZrySnz) O3 (1) (where x, y, z, and a satisfy 0.09≦x≦0.30, 0.025≦y≦0.074, 0≦z≦0.02, and 0.986≦a≦1.02).;A piezoelectric material according to an embodiment of the present invention contains no lead, has a low degree of temperature dependency of piezoelectric performance within operation temperature ranges of piezoelectric elements, and good piezoelectric properties.

主权项

1. A piezoelectric material comprising:
a main component containing a perovskite-type metal oxide represented by a general formula (1) below; Mn as a first subcomponent; Li as a second subcomponent; and Bi as a third subcomponent, wherein a Mn content relative to 100 parts by weight of the metal oxide is 0.04 parts by weight or more and 0.36 parts by weight or less on a metal basis, a Li content α relative to 100 parts by weight of the metal oxide is 0.0013 parts by weight or more and 0.0280 parts by weight or less on a metal basis, a Bi content β relative to 100 parts by weight of the metal oxide is 0.042 parts by weight or more and 0.850 parts by weight or less on a metal basis, and the contents α and β satisfy 0.5≦(α·MB)/(β·ML)≦1 (where ML represents an atomic weight of Li and MB represents an atomic weight of Bi)
(Ba1-xCax)a(Ti1-y-zZrySnz)O3  (1)(where x, y, z, and a satisfy 0.09≦x≦0.30, 0.025≦y≦0.074, 0≦z≦0.02, and 0.986≦a≦1.02).