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Phase evolution of solid-state BaTiO3 powder prepared with the ultrafine BaCO3 and TiO2

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Abstract

The phase evolution, nucleation, and sintered ceramics of barium titanate (BaTiO3, BT) powder prepared by solid-state synthesis with an ultrafine starting material (27 m2/g of BaCO3 and 190 m2/g of TiO2) were investigated in this study. Surface diffusion between BaCO3 and TiO2 was observed at a relatively low temperature of 400 °C by transmission electron microscopy. Rapid nucleation of the BT and cubic BT phases was observed at 500 °C by x-ray diffraction. The derivative thermogravimetry curve clearly shows a single step of BT formation at 600 °C. In short, pure BT particles with an average particle size of 250 nm and high tetragonality were prepared by solid-state synthesis, which produced X7R ceramics with high dielectric permittivity, high insulation resistance, and a clear core–shell structure.

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ACKNOWLEDGMENTS

T-T.L. would like to thank Yageo Corporation for supporting the Ph.D. program. This work was supported by the National Science Council of Taiwan under Contract No. NSC 100-2221-E-006-134-MY3.

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Authors and Affiliations

  1. Department of Resources Engineering, National Cheng Kung University, Tainan, 70101, Taiwan

    Ting-Tai Lee, Che-Yuan Chang & Chi-Yuen Huang

  2. MLCC R & D Division, Yageo Corporation, Kaohsiung, 81170, Taiwan

    Ting-Tai Lee, I-Kuan Cheng, Ching-Li Hu, Chun-Te Lee & Masayuki Fujimoto

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  1. Ting-Tai Lee
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  2. Che-Yuan Chang
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Correspondence to Chi-Yuen Huang.

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Lee, TT., Chang, CY., Huang, CY. et al. Phase evolution of solid-state BaTiO3 powder prepared with the ultrafine BaCO3 and TiO2. Journal of Materials Research 27, 2495–2502 (2012). https://doi.org/10.1557/jmr.2012.255

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