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To Journal of Phase Equilibria and Diffusion Phase Relationship of the BaO-ZrO2-YO1.5 System at 1500 and 1600 °C

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Abstract

Phase relationship of a BaO-ZrO2-YO1.5 system at 1500 and 1600 °C was examined in order to determine whether a phase separation at the composition of 15% yttrium-doped barium zirconate exists. According to a pseudoternary phase diagram of the BaO-ZrO2-YO1.5 system established by this work, the solubility of yttria into cubic barium zirconate at 1600 °C is 0.25 in a mole fraction of yttria \( (X_{{{\text{YO}}_{1.5} }} ) \). Thus, we confirmed that there is no phase separation at the composition of 15% yttrium-doped barium zirconate at 1600 °C. On the other hand, at 1500 °C, there might be a phase separation at the composition of 15% yttrium-doped barium zirconate into yttrium-doped barium zirconate where quite small amount of yttrium is doped and a new phase whose composition is close to reported BZ(II) phase.

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Acknowledgments

This study was supported by Industrial Technology Research Grant Program in 2006 from New Energy and Industrial Technology Development Organization (NEDO) of Japan. A part of this study was also financially supported by Research Fellowship for Young Scientists from JSPS (202005). We are grateful to Professors Tetsu Ichitsubo and Eiichiro Matsubara for letting me use FE-SEM. I also would like to thank Professor Kyosuke Kishida and Mr. Kengo Goto for their help about the structure analysis of BZ(II) phase with TEM.

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  1. Department of Materials Science and Engineering, Kyoto University, Yoshida-Honmachi, Sakyo, Kyoto, 606-8501, Japan

    Susumu Imashuku, Tetsuya Uda, Yoshitaro Nose & Yasuhiro Awakura

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  1. Susumu Imashuku
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  2. Tetsuya Uda
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Correspondence to Susumu Imashuku.

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Imashuku, S., Uda, T., Nose, Y. et al. To Journal of Phase Equilibria and Diffusion Phase Relationship of the BaO-ZrO2-YO1.5 System at 1500 and 1600 °C. J. Phase Equilib. Diffus. 31, 348–356 (2010). https://doi.org/10.1007/s11669-010-9736-2

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