Piezoelectric material, piezoelectric element, liquid discharge head, ultrasonic motor, and dust cleaning device

摘要

A piezoelectric material including a strontium calcium sodium niobate-based tungsten bronze structure metal oxide having a high degree of orientation is provided. A piezoelectric element, a liquid discharge head, an ultrasonic motor, and a dust cleaning device including the piezoelectric material are also provided. A piezoelectric material includes a tungsten bronze structure metal oxide that includes metal elements which are strontium, calcium, sodium, and niobium, and tungsten. The metal elements satisfy following conditions on a molar basis: when Sr/Nb=a, 0.320≦a≦0.430, when Ca/Nb=b, 0.008≦b≦0.086, and when Na/Nb=c, 0.180≦c≦0.200. The tungsten content on a metal basis is 0.40 to 3.20 parts by weight relative to 100 parts by weight of the tungsten bronze structure metal oxide. The tungsten bronze structure metal oxide has a c-axis orientation.

主权项

1. A piezoelectric material comprising:
a tungsten bronze structure metal oxide that includes metal elements which are strontium, calcium, sodium, and niobium; and tungsten,wherein
the metal elements satisfy following conditions on a molar basis:
when Sr/Nb=a, 0.320≦a≦0.430,when Ca/Nb=b, 0.008≦b≦0.086, andwhen Na/Nb=c, 0.180≦c≦0.200; a tungsten content on a metal basis is 0.40 to 3.20 parts by weight relative to 100 parts by weight of the tungsten bronze structure metal oxide; and the tungsten bronze structure metal oxide has a c-axis orientation.