Strategy to boost hydrolysis resistance and stabilize low infrared emissivity of ZrB_(2) via nanoscale LaF_(3) surface modification

作     者：Xue-Jing Xing Xian Jian Lin-Bo Zhang Hai-Peng Lu Zhong-Wei Zhang Simeon Agathopoulos Liang-Jun Yin Long-Jiang Deng Xue-Jing Xing;Xian Jian;Lin-Bo Zhang;Hai-Peng Lu;Zhong-Wei Zhang;Simeon Agathopoulos;Liang-Jun Yin;Long-Jiang Deng

作者机构：School of Materials and EnergyUniversity of Electronic Science and Technology of ChinaChengdu 611731China The Yangtze Delta Region Institute(Huzhou)University of Electronic Science and Technology of ChinaHuzhou 313001China National Engineering Research Center of Electromagnetic Radiation Control MaterialsUniversity of Electronic Science and Technology of ChinaChengdu 611731China Laboratory of Energy Storage and New Energy Materials TechnologyCentral Research InstituteDongfang Electric CorporationChengdu 611731China Department of Materials Science and EngineeringUniversity of Ioanninaloannina 45110Greece 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2022年第41卷第12期

页      面：4164-4175页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51802037 and 51972046) Sichuan Science and Technology Program(No.2020JDRC0045) 

主　　题：ZrB_(2) LaF_(3) Carbothermal reaction Hydrolysis resistance Hydrophobic behavior 

摘      要：Owing to its excellent high-temperature resistance and high conductivity,zirconium diboride(ZrB_(2)) has been applied as an infrared suppression coating.However,ZrB_(2)is susceptible to hydrolysis under high-moisture conditions and even under mild working temperatures.The improvement in the hydrophobicity of the ZrB_(2)surface effectively reduces wetting by water and suppresses hydrolysis reaction,particularly under high-temperature and high-moisture conditions.Herein,we report a novel,easy,and highly reproducible method for producing a fully coated ZrB_(2)surface by developing a nanoscale hydrophobic layer of glassy LaF_(3)on the surface of ZrB_(2)powder particles in situ(i.e.,during the carbothermal synthesis of ZrB_(2)).Through the tests carried out at 200 ℃for 100-300 h in a hydrothermal reactor,the produced powders displayed remarkably high long-term hydrolysis resistance and pronounced chemical stability.Compared with treated ZrB_(2),ZrB_(2)@LaF_(3)remained lower infrared emissivity when continuously intensifying hydrolyzation process.The results suggest that a nanoscale surface modification strategy can be applied to stabilize the infrared emissivity of ZrB_(2)in a water-oxygen coupling environment.