Piezoelectric characteristics of PMN-PZT ceramics for piezoelectric transformer

Author

Yoo, J.H. ; Yoon, H.S. ; Yoon, K.H. ; Jeong, Y.H. ; Park, C.Y.

Author_Institution

Dept. of Electr. Eng., Se-Myung Univ., South Korea

Volume

1

fYear

1998

fDate

1998

Firstpage

981

Abstract

In this paper, piezoelectric properties of PMN-PZT ceramics were investigated as a function of CeO₂ addition from 0 mole% to 2.0 mole%. The grain size was decreased and the shape of it was more uniform with the addition of CeO₂. At the specimen with 0.25 mole% CeO₂, mechanical quality factor (Q_m) and electromechanical coupling coefficient (K_p) showed the excellent results of 1,792 and 0.518, respectively. The electric coercive field was increased and the curie temperature was decreased with the addition of CeO₂. A Rosen type-piezoelectric transformer has been designed and fabricated using composition ceramic material added with 0.5 mole CeO₂. Voltage step-up ratios of 230 and 13 were obtained with the 42×8×1 mm transformer at no load 100 KΩ resistance, respectively. Resonant frequencies of the transformer were also 81.4 kHz and 80 kHz at no load, 100 KΩ

Keywords

Q-factor; ferroelectric Curie temperature; grain size; lead compounds; piezoceramics; piezoelectric devices; power transformers; CeO₂ addition; Curie temperature; PMN-PZT ceramic; PMN-PZT-CeO₂; PbMgO3NbO3-PbZrO3TiO3-CeO2; Rosen type piezoelectric transformer; electric coercive field; electromechanical coupling coefficient; grain size; mechanical quality factor; piezoelectric characteristics; resonant frequency; voltage step-up ratio; Additives; Aluminum; Building materials; Ceramics; Dielectric measurements; Grain size; Q factor; Raw materials; Resonant frequency; Ultrasonic variables measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE

Conference_Location

Sendai

ISSN

1051-0117

Print_ISBN

0-7803-4095-7

Type

conf

DOI

10.1109/ULTSYM.1998.762306

Filename

762306