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Volume 29 Issue 9
Sep.  2022

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Pamornnarumol Bhupaijit, Chonnarong Kaewsai, Tawat Suriwong, Supree Pinitsoontorn, Surirat Yotthuan, Naratip Vittayakorn, and Theerachai Bongkarn, Effect of Co2+ substitution in B-sites of the perovskite system on the phase formation, microstructure, electrical and magnetic properties of Bi0.5(Na0.68K0.22Li0.10)0.5TiO3 ceramics, Int. J. Miner. Metall. Mater., 29(2022), No. 9, pp. 1798-1808. https://doi.org/10.1007/s12613-021-2345-8
Cite this article as:
Pamornnarumol Bhupaijit, Chonnarong Kaewsai, Tawat Suriwong, Supree Pinitsoontorn, Surirat Yotthuan, Naratip Vittayakorn, and Theerachai Bongkarn, Effect of Co2+ substitution in B-sites of the perovskite system on the phase formation, microstructure, electrical and magnetic properties of Bi0.5(Na0.68K0.22Li0.10)0.5TiO3 ceramics, Int. J. Miner. Metall. Mater., 29(2022), No. 9, pp. 1798-1808. https://doi.org/10.1007/s12613-021-2345-8
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研究论文

Co2+取代钙钛矿结构B位对Bi0.5(Na0.68K0.22Li0.10)0.5TiO3陶瓷相形成、显微组织、电学和磁学性能的影响

  • 通讯作者:

    Theerachai Bongkarn    E-mail: researchcmu@yahoo.com

  • 通过固态燃烧技术制备Bi0.5(Na0.68K0.22Li0.10)0.5Ti1–xCoxO3 无铅钙钛矿陶瓷(BNKLT–xCo, x = 0, 0.005, 0.010, 0.015, 0.020)。因少量Co2+离子置换到 Ti 位点而导致 BNKLT 陶瓷的相组成、微观结构、电学和磁学性能发生改变。使用 X 射线衍射 (XRD) 发现在所有样品中菱面体和四方相共存。 Rietveld 结果表明,当 x 从 0 增加到 0.020 时,菱面体相比例从 39% 增加到 88%。当 x 增加时,平均晶粒尺寸增加。随着 x 的增加,产生了更多的氧空位,导致双极应变(SE)磁滞回线不对称。x = 0.010 时,介电常数 (εm) 达到5384,应变 (Smax)达到0.23%,归一化应变 ($\left({d}_{33}^{*}\right) $) 为 460 pm·V–1。 50 K温度下,BNKLT–0Co 陶瓷表现出抗磁行为,但所有 BNKLT–xCo 陶瓷表现出顺磁行。
  • Research Article

    Effect of Co2+ substitution in B-sites of the perovskite system on the phase formation, microstructure, electrical and magnetic properties of Bi0.5(Na0.68K0.22Li0.10)0.5TiO3 ceramics

    + Author Affiliations
    • Bi0.5(Na0.68K0.22Li0.10)0.5Ti1–xCoxO3 lead-free perovskite ceramics (BNKLT–xCo, x = 0, 0.005, 0.010, 0.015 and 0.020) were fabricated via the solid-state combustion technique. A small-amount of Co2+ ion substitution into Ti-sites led to modification of the phase formation, microstructure, electrical and magnetic properties of BNKLT ceramics. Coexisting rhombohedral and tetragonal phases were observed in all samples using the X-ray diffraction (XRD) technique. The Rietveld refinement revealed that the rhombohedral phase increased from 39% to 88% when x increased from 0 to 0.020. The average grain size increased when x increased. With increasing x, more oxygen vacancies were generated, leading to asymmetry in the bipolar strain (SE) hysteresis loops. For the composition of x = 0.010, a high dielectric constant (εm) of 5384 and a large strain (Smax) of 0.23% with the normalized strain $ \left({d}_{33}^{*}\right) $ of 460 pm·V–1 were achieved. The BNKLT–0Co ceramic showed diamagnetic behavior but all of the BNKLT–xCo ceramics exhibited paramagnetic behavior, measured at 50 K.
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