Page 36 - 机械工程材料2024年第十一期

王加康，等： Cr 2 O 3 掺杂BS-PMS-PZT大功率压电陶瓷的电学性能及温度稳定性

［18］ PICHT G，KHANSUR N H，WEBBER K G，et al. ［19］ LI J L，QU W B，DANIELS J，et al. Lead zirconate

Grain size effects in donor doped lead zirconate titanate titanate ceramics with aligned crystallite grains［J］.
ceramics［J］. Journal of Applied Physics，2020，128（21）： Science，2023，380（6640）：87-93.
214105.

Electrical Properties and Temperature Stability of Cr O Doped
3
2
BS-PMS-PZT High-Power Piezoelectric Ceramics

WANG Jiakang , WANG Yiping , LIU Hao , YANG Ying 1
1, 2
1
1, 2
(1. State Key Laboratory of Mechanics and Control for Aerospace Structures, 2. College of Materials Science and Technology,
Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)
Abstract: 0.05BiScO 3 -0.05Pb(Mn 1/3 Sb 2/3 )O 3 -0.9Pb(Zr 0.45 Ti 0.55 )O 3 ceramics doped with different atomic fractions
(0‒0.8%) of Cr 2 O 3 were prepared by solid-phase sintering method. The effects of Cr 2 O 3 doping amounts on the
microstructure, electrical property and temperature stability of the ceramics were investigated. The results show that
the ceramics with different Cr 2 O 3 doping amounts all had perovskite structures and no impurity was detected. With the
increase of Cr 2 O 3 doping amount, the tripartite phase gradually appeared and its amount intensity increased, the tetragonal
phase amount decreased slightly, the average grain size continuously increased, and the relative density increased first
and then decreased. With the increase of Cr 2 O 3 doping amount, the piezoelectric constant and mechanical quality factor of
the ceramics both increased and then decreased, the dielectric loss increased, the electromechanical coupling coefficient
basically increased and then decreased, and the Curie temperature decreased. When the atomic fraction of Cr 2 O 3 was
0.4%, the comprehensive electrical properties of ceramics were the best, and the temperature stability was good. From
room temperature to 260 °C, the decreasing rate of piezoelectric constant of the ceramics with 0.4% atomic fraction of
Cr 2 O 3 was 32%, which was lower than that of DM-8 commercial PZT-8 modified piezoelectric ceramics (53%).
Key words: high-power piezoelectric ceramic; element doping; electrical property; temperature stability

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