Investigation on Piezoelectric Ceramics with High d_(33). d_(31) for a New Type of Rotational Stepper Motor

摘要

A quarternary system ceramics with high piezoelectric constants particularly in high d_(31), high d_(33) was studied. The composition of materials is PMN-PNN-PZT doping with oxides of Sr, Bi, Sn and La etc. The properties of the materials are as follow: d_(33) = (600-750)10~(-12)C/N, d_(31) = (-300-398) × 10~(-12) C/N, Kp = 0.68-0.75. By using this materials, a new type of rotational stepper motor, piezoelectric electro-rheological motor had been made. This kind of motor has unique advantages: no vibration noise, zero wear, low consumed power, large travel range and high resolution etc.