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Bi0.5Na0.5TiO3-BiFeO3-SrTiO3 삼성분계 무연 압전 세라믹스의 강유전체-완화형 강유전체 상전이 거동

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Abstract
This study investigated the structural, dielectric, ferroelectric, and strain properties of (0.98-x)Bi1/2Na1/2TiO3-0.02BiFeO3-xSrTiO3 (BNT-BF-100xST, x=0.20, 0.22, 0.24, 0.26, and 0.28). All samples were successfully synthesizedusing the conventional solid-state reaction method and sintered at 1,175℃ for 2 h. The average grain size of the BNT-BF-100x ceramics decreased with increasing ST content. Furthermore, we observed that the ferroelectric- relaxortransition temperature (TF-R) decreased with increasing ST content, which eventually vanished in the BNT-BF-24ST ceramics. The results indicated that a ferroelectric to relaxor phase transition could be induced by ST modification.
Consequently, a large electromechanical strain of 633 pm/V at 4 kV/mm was observed for the BNT-BF-26ST ceramics. These results imply that our materials have the competitive advantage of larger strain under lower operating fieldconditions compared with other BNT-based lead-free piezoelectric ceramics. We expect that BNT-BF-ST lead-free piezoelectric ceramics are promising candidates as a novel ternary BNT-based system and can find potential applications in actuators.
Author(s)
이상섭이창헌즈엉 짱 안웬 호앙 티엔 코이한형수이재신
Issued Date
2021
Type
Article
Keyword
전기공학
DOI
10.4313/JKEM.2021.34.1.1
URI
https://oak.ulsan.ac.kr/handle/2021.oak/8964
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_nrf_kci_oai_kci_go_kr_ARTI_9632280&context=PC&vid=ULSAN&lang=ko_KR&search_scope=default_scope&adaptor=primo_central_multiple_fe&tab=default_tab&query=any,contains,Bi0.5Na0.5TiO3-BiFeO3-SrTiO3%20%EC%82%BC%EC%84%B1%EB%B6%84%EA%B3%84%20%EB%AC%B4%EC%97%B0%20%EC%95%95%EC%A0%84%20%EC%84%B8%EB%9D%BC%EB%AF%B9%EC%8A%A4%EC%9D%98%20%EA%B0%95%EC%9C%A0%EC%A0%84%EC%B2%B4-%EC%99%84%ED%99%94%ED%98%95%20%EA%B0%95%EC%9C%A0%EC%A0%84%EC%B2%B4%20%EC%83%81%EC%A0%84%EC%9D%B4%20%EA%B1%B0%EB%8F%99&offset=0&pcAvailability=true
Publisher
전기전자재료학회논문지
Location
대한민국
Language
한국어
ISSN
1226-7945
Citation Volume
34
Citation Number
1
Citation Start Page
1
Citation End Page
7
Appears in Collections:
Engineering > Material Engineering
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