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Tailoring of thermal expansion and phase transition temperature of ZrW2O8 with phosphorus and enhancement of negative thermal expansion of ZrW1.5P0.5O7.75 |
Chenjun Zhang(张晨骏)1,2, Xiaoke He(何小可)3,†, Zhiyu Min(闵志宇)1,2,‡, and Baozhong Li(李保忠)4 |
1 School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China; 2 Luoyang Institute of Science and Technology, Luoyang 471023, China; 3 North China University of Water Resources and Electric Power, Zhengzhou 450045, China; 4 Luoyang Smart Agricultural Equipment Institute Co., Ltd., Luoyang 471023, China |
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Abstract ZrW$_{2}$O$_{8}$ is a typical isotropic negative thermal expansion material with cubic structure. However, quenching preparation, pressure phase transition and metastable structure influence its practical applications. Adopting P to part-substitute W for ZrW$_{2-x}$P$_{x}$O$_{8-0.5x}$ has decreased the sintering temperature and avoided the quenching process. When $x=0.1$, ZrW$_{1.9}$P$_{0.1}$O$_{7.95}$ with a stable cubic structure can be obtained at 1150 $^\circ$C. The thermal expansion coefficient is tailored with the P content, and phase transition temperature is lowered. When $x=0.5$, thermal expansion coefficient attains $-13.6\times10^{-6}$ $^{\circ}$C$^{-1}$, ZrW$_{1.5}$P$_{0.5}$O$_{7.75}$ exhibits enhance negative thermal expansion property. The difference of electronegativity leads to the decrease of phase transition temperature with the increase of P content. The different radii of ions lead to new structure of materials when P substitutes more. The results suggest that the P atom plays the stabilization role in the crystal structure of ZrW$_{2-x}$P$_{x}$O$_{8-0.5x}$.
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Received: 28 June 2022
Revised: 02 September 2022
Accepted manuscript online: 21 September 2022
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PACS:
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82.47.Aa
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(Lithium-ion batteries)
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79.60.Jv
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(Interfaces; heterostructures; nanostructures)
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65.40.gk
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(Electrochemical properties)
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Fund: Project supported by the Key Scientific and Technological Research Projects of Henan Province, China (Grant Nos. 222102220021 and 222102220056). |
Corresponding Authors:
Xiaoke He, Zhiyu Min
E-mail: hexiaoke@ncwu.edu.cn;200900300185@lit.edu.cn
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Cite this article:
Chenjun Zhang(张晨骏), Xiaoke He(何小可), Zhiyu Min(闵志宇), and Baozhong Li(李保忠) Tailoring of thermal expansion and phase transition temperature of ZrW2O8 with phosphorus and enhancement of negative thermal expansion of ZrW1.5P0.5O7.75 2023 Chin. Phys. B 32 048201
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