Kim, Sang-Jong Ha, Jong-Yoon Choi, Ji-Won Kang, Chong-Yun Kim, Hyun-Jai Jeong, Dae-Yong Sung, Man-Young Yoon, Seok-Jin 2024-01-21T01:33:33Z 2024-01-21T01:33:33Z 2021-09-05 2007-02 0021-4922 https://pubs.kist.re.kr/handle/201004/134689 The solid solution system of 0.05Pb(Al.0.5Nb0.5)O-3-0.95Pb(Zr0.52Ti0.48)O-3 (PAN-PZT) has been studied for the piezoelectric ultrasonic motor with its high T-c. In this article, we doped the Nb2O5 and MnO2 into the 0.05PAN-0.95PZT ceramics as donor and acceptor respectively and reported the doping effect oil the piezoelectric properties. Apparently, Nb2O5 induced the "soft" piezoelectric characteristics. However, as Nb2O5 also affected the sintered density, which is closely related with the piezoelectric properties, it is quite difficult to identify the role of Nb2O5, which might act as the "donor" and/or sintering enhancer. The optimized piezoelectric properties were obtained d(33) = 430 pC/N, k(p) = 59%, Q(m) = 79, and epsilon(T)(3)/epsilon(0) when PAN-PZT + 0.7 wt % Nb2O5 sintered at 1200 degrees C for 1 h. When MnO2 was doped, Mn4+ ions induced the distortion of perovskite Structure and Tc shifted to lower temperature. In addition, d(33) and k(p) decreased and Q(m) dramatically increased with the addition of MnO2. From these results, it was believed that MnO2 mainly acted as acceptor in PAN-PZT ceramics. The optimized piezoelectric properties were obtained d(33) = 340 pC/N, k(p) = 61.6%, Q(m) = 1725, T-c = 392 degrees C, and epsilon(T)(3)/epsilon(0) = 1250, when PAN-PZT + 0.7 wt % Nb2O5 with 0.5 wt % MnO2 ceramics sintered at 1200 degrees C for 1 h. English INST PURE APPLIED PHYSICS ELECTRICAL-PROPERTIES PARAMETERS Piezoelectric and dielectric properties of 0.05Pb(Al.0.5Nb0.5)O-3-0.95Pb(Zr0.52Ti0.48)O-3 ceramics doped with Nb2O5 and MnO2 Article 10.1143/JJAP.46.691 1 JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, v.46, no.2, pp.691 - 694 JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS 46 2 691 694 scie scopus 000246059000048 2-s2.0-34547921326 Physics, Applied Physics Article ELECTRICAL-PROPERTIES PARAMETERS piezoelectric PAN-PZT actuator Nb2O5 MnO2