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JOURNAL OF SYNTHETIC CRYSTALS ›› 2024, Vol. 53 ›› Issue (5): 899-903.

• Research Articles • Previous Articles     Next Articles

Hygroscopicity and Thermal Expansion Properties of (ZrCa)xY2-2xW3O12 Solid Solution

WANG Xianli, FU Linjie, YU Zhanjun, CHEN Dongxia, DUAN Xiangyang   

  1. School of Materials Science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou 450046, China
  • Received:2023-12-05 Online:2024-05-15 Published:2024-05-21

Abstract: (ZrCa)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) are developed with a simple solid state method, and characterized for crystal structure, hygroscopicity and thermal expansion by X-ray diffraction, Raman spectroscopy, thermal analysis and dilatometer. The results show that the hygrosopicity of solid solution decreases obviously, and the coefficient of thermal expansion (CTE) changes regularly after complete release of the crystal water with the increase of (ZrCa)6+ content. A near-zero thermal expansion (ZTE) is realized for (ZrCa)0.6Y0.8W3O12 as x=0.6, and the linear CTE (al) is measured to be 2.79×10-7 K-1(453~1 000 K).

Key words: solid solution, negative thermal expansion, (ZrCa)xY2-2xW3O12, hygrosopicity, Raman spectroscopy

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