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Ceramist > Volume 24(3); 2021 > Article
Ceramist 2021;24(3):273-285.
DOI: https://doi.org/10.31613/ceramist.2021.24.3.07    Published online September 30, 2021.
“Generation III” Piezoelectric Single Crystals Developed by Solid-State Single Crystal Growth Method
Ho-Yong LEE
Sunmoon University Department of Advanced Materials Engineering 70, Sunmoon-ro 221 beon-gil, Tangjeong-myeon, Asan-si, Chungcheongnam-do, Korea, 31460
고상 단결정 성장법을 이용한 제 3 세대 압전 단결정의 개발 및 응용
이호용
선문대학교 신소재 공학과
Correspondence:  Ho-Yong LEE,
Email: hlee@sunmoon.ac.kr
Received: 30 August 2021   • Accepted: 3 September 2021
Abstract
Crystallographically engineered Relaxor-PT single crystals, specifically PMN-PT (Generation I) and PIN-PMN-PT/PMN-PZT (Generation II), offer much higher piezoelectric and electromechanical coupling coefficients (d33>1,500 pC/N, k33>0.9), when compared to polycrystalline PZT-5H ceramics (d33>600 pC/N, k33>0.75). Recently Ceracomp Co., Ltd. (www.ceracomp.com) has developed the solid-state single crystal growth (SSCG) technique and successfully fabricated Gen III PMN-PZT single crystals modified with acceptors or donors. The piezoelectric constants (d33) of (001) Gen III PMN-PZT single crystals were measured to be higher than 4,000 pC/N and thus about two times higher than those of PMN-PT/PZN-PT (Gen I) and PIN-PMN-PT/PMN-PZT (Gen II) single crystals. The Gen III PMN-PZT single crystals have been firstly applied to single crystal-epoxy composites, ultrasonic transducers, piezoelectric sensors, and piezoelectric actuators. In this paper we introduce the development of Gen III PMN-PZT single crystals, piezoelectric composites and multilayer single crystal actuators.
Key Words: Piezoelectric Single Crystal, Piezoelectric Constant, Crystal Growth, Piezoelectric Actuator, Piezoelectric Composite
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