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Substitutions of Zr4+/V5+ for Y3+/Mo6+ in Y2Mo3O12 for Less Hygroscopicity and Low Thermal Expansion Properties

1
Collage of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450011, China
2
Henan Key Laboratory of Photovoltaic Materials and Low Dimensional Materials Science Laboratory, Henan University, Kaifeng 475004, China
*
Authors to whom correspondence should be addressed.
Materials 2019, 12(23), 3945; https://doi.org/10.3390/ma12233945
Received: 11 October 2019 / Revised: 22 November 2019 / Accepted: 24 November 2019 / Published: 28 November 2019
In this investigation, ZrxY2−xVxMo3−xO12 (0 ≤ x ≤ 1.4) is developed and the effects of the substitutions of Zr4+/V5+ for Y3+/Mo6+ in Y2Mo3O12 on the hygroscopicity and thermal expansion property are investigated. For the smaller substitution content (x ≤ 0.5), their crystal structures remain orthorhombic, while there is crystal water still in the lattice. The linear coefficients of thermal expansions (CTEs), for x = 0.1, 0.3, 0.5, and 0.7, are about −4.30 × 10−6, −0.97 × 10−6, 0.85 × 10−6, and 0.77 × 10−6 K−1, respectively, from 476 to 773 K, which means that the linear CTE could be changed linearly with the substitution content of Zr4+/V5+ for Y3+/Mo6+ in Y2Mo3O12. As long as the substitution content reaches x = 1.3/1.4, almost no hygroscopicity and low thermal expansion from room temperature are obtained and are discussed in relation to the crystal structure and microstructure. View Full-Text
Keywords: hygroscopicity; thermal expansion; substitutions; microstructure hygroscopicity; thermal expansion; substitutions; microstructure
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MDPI and ACS Style

Ma, Q.; Chen, L.; Qi, H.; Xu, Q.; Yuan, B.; Liu, X.; Xu, L. Substitutions of Zr4+/V5+ for Y3+/Mo6+ in Y2Mo3O12 for Less Hygroscopicity and Low Thermal Expansion Properties. Materials 2019, 12, 3945.

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