Densified micro-zone molten salt method for scale-up synthesis of high-entropy ceramic powdersOA
Molten salt methods have been widely used in the synthesis of high-entropy ceramic powders,yet their scalable production for industrial applications is lacking.In this work,for the first time,a densified microzone molten salt(DMMS)approach was developed for the scale-up preparation of high-entropy ceramic powders,including zirconates,hafnates,silicates,and carbides.The“densified”block of DMMS permitted only trace evaporation of molten salt on surfaces,and the internal“microzone”salt pools significantly promoted the in situ formation of high-entropy phases at relatively low temperatures.Single-phase(La_(0.2)Nd_(0.2)Sm_(0.2)Eu_(0.2)Gd_(0.2))_(2)Zr_(2)O_(7)(HEZO)powders,as an example,could be synthesized with only~10 wt%volatilization of NaCl-KCl-NaF salt during 1200℃ treatment,while the resulting powders prepared by the traditional powdery method contained segregation phases with a salt loss as high as~95 wt%.By simply accommodating the“densified”blocks in a tunnel kiln,scale-up synthesis of high-entropy ceramic powders by DMMS can be realized for industrial production.
Yongxin Wang;Ling Zhang;Tianyu Xue;Yabo Gao;Hang Li;Huicong Lei;Zhong Huang;Jinhui Cao;Haijun Zhang;Shaowei Zhang
State Key Laboratory of Advanced Refractories,Wuhan University of Science and Technology,Wuhan 430081,ChinaCollege of Engineering,Mathematics and Physical Sciences,University of Exeter,Exeter EX44QF,UKState Key Laboratory of Advanced Refractories,Wuhan University of Science and Technology,Wuhan 430081,ChinaState Key Laboratory of Advanced Refractories,Wuhan University of Science and Technology,Wuhan 430081,ChinaState Key Laboratory of Advanced Refractories,Wuhan University of Science and Technology,Wuhan 430081,ChinaState Key Laboratory of Advanced Refractories,Wuhan University of Science and Technology,Wuhan 430081,ChinaState Key Laboratory of Advanced Refractories,Wuhan University of Science and Technology,Wuhan 430081,China Joint International Research Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,ChinaSchool of Energy and Power Engineering,Changsha University of Science&Technology,Changsha 410014,ChinaState Key Laboratory of Advanced Refractories,Wuhan University of Science and Technology,Wuhan 430081,ChinaCollege of Engineering,Mathematics and Physical Sciences,University of Exeter,Exeter EX44QF,UK
化学化工
high-entropy ceramic powdersmicrozone molten saltzirconatescale-up synthesis
《Journal of Advanced Ceramics》 2026 (4)
P.233-241,9
financially supported by the National Natural Science Foundation of China(Nos.U23A20559,52202025,and 52304319)the Wuhan Metropolitan Area Collaborative Innovation Technology Project(No.2025070604020038)the Hunan Province“Huxiang Talents”Project(No.2024RC3164)“The 14th Five-Year Plan”Hubei Provincial Advantaged Characteristic Disciplines(Groups)Project of Wuhan University of Science and Technology(No.2023A0307).
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