期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 39, 期 15, 页码 4697-4704出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2019.07.013
关键词
BiFeO3; BaTiO3; Mn-doping; Water-quenching
资金
- National Research Foundation of Korea (NRF) - Ministry of Education [2016R1A2B2016348, 2018R1A5A6075959]
- National Research Foundation of Korea [2016R1A2B2016348] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Different manganese oxides-doping effects were compared in piezoceramic BiFeO3-BaTiO3 system. 0.67Bi(1.05)(Fe0.99Mn0.01x)O-3-0.33BaTiO(3) (valence state x = 4 +, 3 + , and 2 + ) ceramics were prepared via a solid-state reaction process followed by furnace-cooling (FC) or water-quenching (WQ) process. For the FC ceramics, the direct piezoelectric sensor coefficient (d(33)) was almost independent of valence state of doped Mn, while d(33) depended on the fraction of Fe3+/Fe2+ in WQ ceramics. The d(33) value was highest for the donor Mn4+-doped ceramic, among the FC ceramics, with 175 pC/N. However, acceptor-doping with Mn2+ prevented the transition of Fe ion valence state from 3+ to 2+ in the WQ ceramics, the Mn2+-doped WQ ceramic showed the largest d(33) of 313 pC/N and converse piezoelectric actuator coefficient, d(33)* of 352 pm/V, with high Curie phase transition temperature (482 degrees C).
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