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Ceramist > Volume 24(3); 2021 > Article
Ceramist 2021;24(3):286-294.
DOI: https://doi.org/10.31613/ceramist.2021.24.3.08    Published online September 30, 2021.
Giant Grain Growth in (K,Na)NbO3 Ceramics
Seonhwa Park1,2, Jung Woo Lee2, Kyung-Hoon Cho3, Yuho Min1, Cheol-Woo Ahn1
1Department of Functional Ceramics, Ceramic Materials Division, Korea Institute of Materials Science (KIMS), Changwon, Gyeongnam, Korea, 51508
2Department of Materials Science and Engineering, Pusan National University, Busan, Korea, 46241
3School of Materials Science and Engineering, Kumoh National Institute of Technology, Gumi 39177, South Korea
비정상 입성장을 통한 비연계 압전 세라믹 단결정 제조 연구
박선화1,2, 이정우2, 조경훈3, 민유호1, 안철우1
1한국재료연구원 기능세라믹연구실
2부산대학교 재료공학부
3국립금오공과대학교 신소재공학부
Correspondence:  Cheol-Woo Ahn,
Email: cheoruahn@kims.re.kr
Received: 25 August 2021   • Revised: 30 August 2021   • Accepted: 30 August 2021
In this manuscript, an interesting phenomenon is reported. It has been reported that the growth of single crystals is observed in donor-doped (K,Na)NbO3 (KNN)-based ceramics. It is very interesting that the growth happens without the addition of a seed. The growth of huge grains (single crystal, approximately 30 mm,) occurs due to the abnormal grain growth (AGG) in KNN-based ceramics. In the AGG compositions, moreover, the seed plates can be synthesized by not topochemical reaction but simple molten salt synthesis (SMSS) which is a simple-and-cheap process. They can be a good candidate for the seeds at reactive templated grain growth (RTGG) or templated grain growth (TGG) process.
Key Words: KNN, Pb-free, Piezoelectric, Single Crystal
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