Calcium-Doped Boron Nitride Aerogel Enables Infrared Stealth at High Temperature Up to 1300℃  

作　　者：Mengya Zhu Guangyong Li Wenbin Gong Lifeng Yan Xuetong Zhang 

机构地区：[1]School of Nano-Tech and Nano-Bionics,University of Science and Technology of China,Hefei 230026,People’s Republic of China [2]Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou 215123,People’s Republic of China [3]School of Physics and Energy,Xuzhou University of Technology,Xuzhou 221018,People’s Republic of China [4]School of Chemistry and Materials Science,University of Science and Technology of China,Hefei 230026,People’s Republic of China [5]Division of Surgery&Interventional Science,University College London,London NW32PF,UK

出　　处：《Nano-Micro Letters》2022年第1期295-306,共12页纳微快报（英文版）

基　　金：financially supported by the Royal Society Newton Advanced Fellowship(NA170184);the National Natural Science Foundation of China(52173052);the Natural Science Foundation of Jiangsu Province(BK20210133).

摘　　要：Boron nitride(BN)aerogels,composed of nanoscale BN building units together with plenty of air in between these nanoscale building units,are ultralight ceramic materials with excellent thermal/electrical insulation,great chemical stability and high-temperature oxidation resistance,which offer considerable advantages for various applications under extreme conditions.However,previous BN aerogels cannot resist high temperature above 900℃ in air atmosphere,and hightemperature oxidation resistance enhancement for BN aerogels is still a great challenge.Herein,a calcium-doped BN(Ca-BN)aerogel with enhanced high-temperature stability(up to~1300℃ in air)was synthesized by introducing Ca atoms into crystal structure of BN building blocks via high-temperature reaction between calcium phosphate and melamine diborate architecture.Such Ca-BN aerogels could resist the burning of butane flame(~1300℃)and keep their megashape and microstructure very well.Furthermore,Ca-BN aerogel serves as thermal insulation layer,together with Al foil serving as both low-infrared-emission layer and high-infrared-reflection layer,forming a combination structure that can effectively hide high-temperature target(heated by butane flame).Such successful chemical doping of metal element into crystal structure of BN may be helpful in the future design and fabrication of advanced BN aerogel materials,and further extending their possible applications to extremely high-temperature environments.

关 键 词：AEROGEL Boron nitride Calcium doping Infrared stealthy Butane flame 

分 类 号：TQ427.26[化学工程]