| 摘要 |
Piezoelectric ceramics of the formula Pb<SUB>(1-z)</SUB>M<SUB>z</SUB>(Mg<SUB>1/3</SUB>Nb<SUB>2/3</SUB>)<SUB>x</SUB>(Zr<SUB>y</SUB>Ti<SUB>1-y</SUB>)<SUB>1-x</SUB>O<SUB>3 </SUB>where M can be either Sr or Ba or both, and x is between 0.3 and 0.6, y is between 0.2 and 0.5, and z is between 0.04 and 0.08. The piezoelectric ceramic is provided as a composite perovskite structure, and may additionally include materials or dopants such as: PbO, HfO<SUB>2</SUB>, TeO<SUB>2</SUB>, WO<SUB>3</SUB>, V<SUB>2</SUB>O<SUB>5</SUB>, CdO, Tm<SUB>2</SUB>O<SUB>3</SUB>, Sm<SUB>2</SUB>O<SUB>3</SUB>, Ni<SUB>2</SUB>O<SUB>3</SUB>, and MnO<SUB>2</SUB>. The piezoelectric ceramics can be used to fabricate piezoelectric elements for a wide variety of devices that can be fabricated to exhibit high power applications including miniaturized displacement elements, buzzers, transducers, ultrasonic sensors and ultrasonic generators, and the like.
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