Orderedisorder transition and thermal conductivities of the(NdSmEuGd)_((1-x)/2)Dy_(2x)Zr_(2)O_(7)series

作     者：Mengyao Li Chucheng Lin Yaran Niu Jimei Zhang Yi Zeng Xuemei Song Mengyao Li;Chucheng Lin;Yaran Niu;Jimei Zhang;Yi Zeng;Xuemei Song

作者机构：The State Key Lab of High Performance Ceramics and Superfine MicrostructureShanghai Institute of CeramicsChinese Academy of SciencesShanghai200050China Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing100049China Key Laboratory of Inorganic Coating Materials CASShanghai Institute of CeramicsChinese Academy of SciencesShanghai200050China 

出 版 物：《Journal of Materiomics》 (无机材料学学报（英文）)

年 卷 期：2023年第9卷第1期

页      面：138-147页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：This work is supported by the National Key Technologies Research and Development Program of China(No.2018YFB0704400) Shanghai Technical Platform for Testing on Inorganic Materials(No.19DZ2290700) 

主　　题：Orderedisorder transition Thermal conductivity High entropy Rare-earth zirconates 

摘      要：Rare-earth zirconates with pyrochlore and fluorite structures have recently been identified as promising thermal barrier coating materials owing to their low thermal *** this study,six samples with the general formula(NdSmEuGd)_((1-x)/2)Dy_(2x)Zr_(2)O_(7)were synthesized to further reduce the thermal conductivity.X-ray diffraction and Raman spectroscopy showed that the transition from an ordered pyrochlore to a disordered fluorite structure is due to cation and anion *** electron microscopy showed that anion disorder occurred before cation disorder.A modified mass disorder parameter was introduced into this system,which can describe the change in thermal conductivity *** parameter can be a basis for designing more complex materials with lower thermal conductivities.