Effect of MgO and PVA on the Synthesis and Properties of Negative Thermal Expansion Ceramics of Zr2(WO4)(PO4)2

Authors

  • Rui Shang,

    1. School of Physical Science & Engineering and Key Laboratory of Materials Physics of Ministry of Education of China, Zhengzhou University, Zhengzhou, China
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  • Qinglun Hu,

    1. School of Physical Science & Engineering and Key Laboratory of Materials Physics of Ministry of Education of China, Zhengzhou University, Zhengzhou, China
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  • Xiansheng Liu,

    1. School of Physical Science & Engineering and Key Laboratory of Materials Physics of Ministry of Education of China, Zhengzhou University, Zhengzhou, China
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  • Erjun Liang,

    Corresponding author
    • School of Physical Science & Engineering and Key Laboratory of Materials Physics of Ministry of Education of China, Zhengzhou University, Zhengzhou, China
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  • Bin Yuan,

    1. School of Physical Science & Engineering and Key Laboratory of Materials Physics of Ministry of Education of China, Zhengzhou University, Zhengzhou, China
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  • Mingju Chao

    1. School of Physical Science & Engineering and Key Laboratory of Materials Physics of Ministry of Education of China, Zhengzhou University, Zhengzhou, China
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  • PACS: 61.72. Ww Doping and impurity implantation in other materials 65.90.+i Other topics in thermal properties of condensed matter 81.15.Np Growth from solid phases 81.20.Lb Ceramics and refractories

ejliang@zzu.edu.cn.

Abstract

A green synthesis of Zr2(WO4)(PO4)2 ceramics from ZrO2, WO3 and P2O5 is presented. It is shown that the ceramics can be synthesized by one-step sintering within 60 min. The relative density of the ceramics can be enhanced from about 75% without sintering additives to 99.8% of the theoretical value with 1.0 wt% MgO and 2.0 wt% polyvinyl alcohol. The grain sizes of the ceramics are smaller and more uniform with MgO added in the raw materials than with MgO added in the Zr2(WO4)(PO4)2 powder. The coefficients of thermal expansion are about −2.325 × 10−6, −1.406 × 10−6, −1.509 × 10−6 and −1.384 × 10−6°C−1 for the samples without MgO, with MgO added in the raw materials, with MgO added in the Zr2(WO4)(PO4)2 powder and with MgO and PVA added in the raw materials, respectively.

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