{'fraction_non_alphanumeric': 0.04602510460251046, 'fraction_numerical': 0.034518828451882845, 'mean_word_length': 5.787234042553192, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Dielectric and piezoelectric properties of low temperature sintering PMW-PNN-PZT ceramics doped with CuO and Bi for duplex ultrasonic sensor

ABSTRACT In this study, in order to develop the composition ceramics for duplex ultrasonic sensor application, PMW-PNN-PZT system ceramics were prepared using CuO as sintering aids and their phase microstructure, piezoelectric and dielectric characteristics were minutely investigated with the amount of Bi substitution. The PMW-PNN-PZT ceramic specimens could be sintered at sintering temperature of 920°C by adding sintering aids CuO without secondary phase. At 0.5 mol% Bi substituted specimen, the density, electromechanical coupling factor(kp), dielectric constant, mechanical quality factor(Qm), piezoelectric constant(d33) and piezoelectric figure of merit (d33·g33) indicated optimal properties of 7.93 g/cm3, 0.676, 2265, 70, 611 pC/N, 18.64(pm2/N), respectively, for duplex ultrasonic sensor application.