中国物理B ›› 2023, Vol. 32 ›› Issue (4): 48201-048201.doi: 10.1088/1674-1056/ac9364
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
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
摘要: 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$_{8-0.5x}$.
中图分类号: (Lithium-ion batteries)