Porous high-entropy rare-earth phosphate(REPO_(4),RE=La,Sm,Eu,Ce,Pr and Gd)ceramics with excellent thermal insulation performance via pore structure tailoring

作     者：Peixiong Zhang Enhui Wang Jingjing Liu Tao Yang Hailong Wang Xinmei Hou Peixiong Zhang;Enhui Wang;Jingjing Liu;Tao Yang;Hailong Wang;Xinmei Hou

作者机构：Institute for Carbon NeutralityUniversity of Science and Technology BeijingBeijing 100083China Liaoning Academy of MaterialsShenyang 110000China Technical Support Center for Prevention and Control of Disastrous Accidents in Metal SmeltingUniversity of Science and Technology BeijingBeijing 100083China School of Materials Science EngineeringZhengzhou UniversityZhengzhou 450001China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2024年第31卷第7期

页      面：1651-1658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：the National Key R&D Program of China(No.2021YFB3701404) the National Natural Science Fund for Distinguished Young Scholars(No.52025041) the National Natural Science Foundation of China(Nos.52250091,51904021,and 52174294) the Fundamental Research Funds for the Central Universities(Nos.FRF-TP-20-02C2 and FRF-BD-22-05) 

主　　题：porous high-entropy(La_(1/6)Ce_(1/6)Pr_(1/6)Sm_(1/6)Eu_(1/6)Gd_(1/6))PO_(4) ceramics high-entropy strategy pore-forming agent method thermal insulation material thermal conductivity 

摘      要：Thermal insulation materials play an increasingly important role in protecting mechanical parts functioning at high *** this study,a new porous high-entropy(La_(1/6)Ce_(1/6)Pr_(1/6)Sm_(1/6)Eu_(1/6)Gd_(1/6))PO_(4)(HE(6RE_(1/6))PO_(4))ceramics was prepared by combining the high-entropy method with the pore-forming agent method and the effect of different starch contents(0–60vol%)on this ceramic properties was systematically *** results show that the porous HE(6RE_(1/6))PO_(4)ceramics with 60vol%starch exhibit the lowest thermal conductivity of 0.061 W·m^(-1)·K^(-1)at room temperature and good pore structure stability with a linear shrinkage of approximately1.67%.Moreover,the effect of large regular spherical pores(10μm)on its thermal insulation performance was discussed,and an optimal thermal conductivity prediction model was *** superior properties of the prepared porous HE(6RE_(1/6))PO_(4)ceramics allow them to be promising insulation materials in the future.