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硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (11): 4195-4200.

• 陶瓷 • 上一篇    下一篇

(ZrMg)xY2-2xW3O12陶瓷的制备及热膨胀性能研究

王献立, 王海丽, 许坤, 段向阳, 陈冬霞   

  1. 郑州航空工业管理学院材料学院,郑州 450046
  • 收稿日期:2024-03-27 修订日期:2024-07-13 出版日期:2024-11-15 发布日期:2024-11-21
  • 通信作者: 陈冬霞,博士,副教授。E-mail:chendx1982@163.com
  • 作者简介:王献立(1986—),男,助理实验师。主要从事负热膨胀材料的研究。E-mail:wangxianli@zua.edu.cn
  • 基金资助:
    河南省自然科学基金(222300420578);河南高校重点科研项目基础研究专项计划(22ZX012);河南省重点研发与推广专项(科技攻关)(222102320345)

Preparation and Thermal Expansion Properties of (ZrMg)xY2-2xW3O12 Ceramics

WANG Xianli, WANG Haili, XU Kun, DUAN Xiangyang, CHEN Dongxia   

  1. School of Materials Science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou 450046
  • Received:2024-03-27 Revised:2024-07-13 Published:2024-11-15 Online:2024-11-21

摘要: 采用固相烧结法制备出(ZrMg)xY2-2xW3O12(x=0、0.1、0.2、0.3、0.4、0.5、0.6、0.7、0.8、0.9和1.0)陶瓷,并利用X射线衍射、拉曼光谱、热分析仪及热膨胀仪分析材料的结构、吸水性及热膨胀性能。结果表明,随着Zr4+/Mg2+含量的增加,(ZrMg)xY2-2xW3O12的吸水性明显降低,热膨胀系数由负热膨胀逐渐变为正热膨胀,且逐渐增大。当x=0.6时,(ZrMg)0.6Y0.8W3O12(455~1 050 K,-0.54×10-6 K-1)展示出近零膨胀性,abc轴的热膨胀系数分别为αa=-1.13×10-6 K-1αb=1.77×10-6 K-1αc=-1.80×10-6 K-1,本征体积热膨胀系数αv=-1.21×10-6 K-1

关键词: (ZrMg)xY2-2xW3O12, 负热膨胀, 热膨胀系数, 吸水性, 固相烧结法

Abstract: (ZrMg)xY2-2xW3O12 (x=0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 and 1.0) ceramics were developed with a simple solid state method, and the structure, hygroscopicity and thermal expansion property of ceramics were characterized by X-ray diffraction, Raman spectroscopy, thermal analyzer and thermal dilatometer. The results show that with the increase of Zr4+/Mg2+ content, the hygrosopicity of (ZrMg)xY2-2xW3O12 ceramics decreases obviously, and the coefficient of thermal expansion increases gradually from negative thermal expansion to positive thermal expansion. A near-zero thermal expansion is realized for (ZrMg)0.6Y0.8W3O12 (455~1 050 K,-0.54×10-6 K-1) as x=0.6, and the coefficient of thermal expansion of a, b and c axes are measured to be αa=-1.13×10-6 K-1, αb=1.77×10-6 K-1 and αc=-1.80×10-6 K-1, respectively. The intrinsic volumetric coefficient of thermal expansion αv is -1.21×10-6 K-1.

Key words: (ZrMg)xY2-2xW3O12, negative thermal expansion, coefficient of thermal expansion, hygrosopicity, solid state method

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