BiFeO3 and BiMnO3 co-dopant in morphotropic boundary of BNT-BT ceramics: study on phase structure and ferro/piezo-electric properties

IF 1.8 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

Journal of the Australian Ceramic Society Pub Date : 2024-06-28 DOI:10.1007/s41779-024-01052-4

Junjun Wang, Yufang Jiao, Yu Tian, Tianyi Ma, Bingsen Wang, Jian He, Danqing Liu, Bin Yang, Fengmin Wu

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Abstract

A series BiFeO₃ and BiMnO₃ co-doped lead-free 0.94Bi_0.5Na_0.5TiO₃-0.06BaTiO₃ (BNBT-xBF-yBM, x = 8, 12; y = 8, 10, 12) ceramics were fabricated by solid-state method, and the detailed crystal structure, electrical properties and thermal stability were thoroughly investigated. The XRD results from the Rietveld fitting demonstrate the coexistence of Rhombohedral (R) and Tetragonal (T) phases in the ceramics at room temperature. High piezoelectric property (d₃₃ > 160 pC/N) are obtained in BNBT-8BF-12BM and BNBT-12BF-10BM ceramics. It is of particular significance that the variations of k_p in the temperature range from 25 to 70 °C is little, respectively, indicating an insensitive temperature-dependent behavior of BNBT-12BF-10BM ceramics. These results indicate the importance of simultaneous modification methods to achieve high electric properties in BNT-BT based ceramics.

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BNT-BT 陶瓷形貌边界中的 BiFeO3 和 BiMnO3 共掺剂：相结构和铁/压电特性研究

采用固态法制备了一系列 BiFeO3 和 BiMnO3 共掺杂无铅 0.94Bi0.5Na0.5TiO3-0.06BaTiO3 (BNBT-xBF-yBM, x = 8, 12; y = 8, 10, 12) 陶瓷，并深入研究了其详细的晶体结构、电性能和热稳定性。里特维尔德拟合的 XRD 结果表明，在室温下，陶瓷中的斜方体（R）相和四方体（T）相共存。BNBT-8BF-12BM 和 BNBT-12BF-10BM 陶瓷具有很高的压电特性（d33 > 160 pC/N）。特别重要的是，在 25 至 70 °C 的温度范围内，kp 的变化分别很小，这表明 BNBT-12BF-10BM 陶瓷的行为对温度不敏感。这些结果表明了同时改性方法对实现基于 BNT-BT 的陶瓷的高电性能的重要性。

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来源期刊

Journal of the Australian Ceramic Society Materials Science-Materials Chemistry

CiteScore

3.70

自引率

5.30%

发文量

123

期刊介绍： Publishes high quality research and technical papers in all areas of ceramic and related materials Spans the broad and growing fields of ceramic technology, material science and bioceramics Chronicles new advances in ceramic materials, manufacturing processes and applications Journal of the Australian Ceramic Society since 1965 Professional language editing service is available through our affiliates Nature Research Editing Service and American Journal Experts at the author''s cost and does not guarantee that the manuscript will be reviewed or accepted