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Crystal structure and electrical conductivity of cubic fluorite-based (YO1.5) x (WO3)0.15(BiO1.5)0.85- x (0 ≤ x ≤ 0.4) solid solutions

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Abstract

(WO3)0.15(BiO1.5)0.85 exhibits a tetragonal structure derived from the fluorite subcell. The electrical conductivity of (WO3)0.15(BiO1.5)0.85 is lower than that of Y2O3-doped Bi2O3. The structure and electrical conductivity of samples formulated as (YO1.5) x (WO3)0.15(BiO1.5)0.85- x (x = 0.1, 0.2, 0.3, and 0.4) were investigated. The as-sintered (YO1.5)0.1(WO3)0.15(BiO1.5)0.75 exhibited a single cubic structure that is isostructural with δ-Bi2O3. For x = 0.2, 0.3, and 0.4, the as-sintered samples consisted of a cubic fluorite structure and rhombohedral Y6WO12. After heat treatment at 600 °C for 200 h, the cubic structures are stable for x = 0.1, 0.3, and 0.4. A transformation from cubic to rhombohedral phase after heat treatment at 600 °C for 200 h was observed in the sample originally formulated as (YO1.5)0.2(WO3)0.15(BiO1.5)0.65.

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Acknowledgments

This work is supported by the Council of Agriculture, Executive Yuan R. O. C. under the grant No. 96AS-10.1.1-AD-U1.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Frontier Material and Micro/Nano Science and Technology Center, National Cheng Kung University, Tainan, 70101, Taiwan, Republic of China

    Cheng-Yen Hsieh & Kuan-Zong Fung

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  1. Cheng-Yen Hsieh
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  2. Kuan-Zong Fung
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Correspondence to Kuan-Zong Fung.

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Hsieh, CY., Fung, KZ. Crystal structure and electrical conductivity of cubic fluorite-based (YO1.5) x (WO3)0.15(BiO1.5)0.85- x (0 ≤ x ≤ 0.4) solid solutions. J Solid State Electrochem 13, 951–957 (2009). https://doi.org/10.1007/s10008-008-0637-9

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  • DOI: https://doi.org/10.1007/s10008-008-0637-9

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