Synthesis of the superfine high-entropy zirconate nanopowders by polymerized complex method  

作　　者：Yangjie HAN Renwang YU Honghua LIU Yanhui CHU 

机构地区：[1]School of Materials Science and Engineering,South China University of Technology,Guangzhou 510641,China

出　　处：《Journal of Advanced Ceramics》2022年第1期136-144,共9页先进陶瓷（英文）

基　　金：support from the National Natural Science Foundation of China(Nos.52122204 and 51972116);the Guangdong Basic and Applied Basic Research Foundation(Nos.2019A1515012145 and 2021A1515010603);the Fundamental Research Foundation for the Central Universities(No.2020ZYGXZR080);the Creative Research Foundation of the Science and Technology on Thermostructural Composite Materials Laboratory(No.JCKYS2020607003).

摘　　要：The high-purity and superfine high-entropy zirconate nanopowders,namely(Y_(0.25)La_(0.25)Sm_(0.25)Eu_(0.25))_(2)Zr_(2)O_(7)nanopowders,without agglomeration,were successfully synthesized via polymerized complex method at low temperatures for the first time.The results showed that the crystallinity degree,lattice strain,and particle size of the as-synthesized powders were gradually enhanced with the increase of the synthesis temperature from 800 to 1300℃.The as-synthesized powders involved fluorite phase in the range of 800-1200℃while they underwent the phase evolution from fluorite to pyrochlore at 1300℃.It is worth mentioning that the as-synthesized powders at 900℃are of the highest quality among all the as-synthesized powders,which is due to the fact that they not only possess the particle size of 11 nm without agglomeration,but also show high purity and good compositional uniformity.

关 键 词：high-entropy oxides ZIRCONATES NANOPOWDERS polymerized complex method 

分 类 号：TB383.3[一般工业技术—材料科学与工程]