Microwave absorption of aluminum/hydrogen treated titanium dioxide nanoparticles  

作　　者：Michael Green Peng Xiang Zhanqiang Liu James Murowchick Xinyu Tan Fuqiang Huang Xiaobo Chen 

机构地区：[1]Department of Chemistry,University of MissourieKansas City,Kansas City,MO,64110,USA [2]College of Materials and Chemical Engineering,Hubei Provincial Collaborative Innovation Center for New Energy Microgrid,China Three Gorges University,Yichang,443002,China [3]State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai,200050,China [4]Department of Geosciences,University of MissourieKansas City,Kansas City,MO,64110,USA [5]State Key Laboratory of Rare Earth Materials Chemistry and Applications,College of Chemistry and Molecular Engineering,Peking University,Beijing,100871,China

出　　处：《Journal of Materiomics》2019年第1期133-146,共14页无机材料学学报（英文）

基　　金：M.G.and X.C.appreciate the support from the U.S.National Science Foundation(DMR-1609061);the College of Arts and Sciences,University of Missouri
Kansas City.X.Tan thanks the support from the National Natural Science Foundation of China(11374181);F.Huang acknowledged the support from the National Key Research and Development Program of China(Grant No.2016YFB0901600);the National Science Foundation of China(Grant Nos.51402334 and 51502331);the Science and Technology Commission of Shanghai(Grant No.14520722000);the Key Research Program of Chinese Academy of Sciences(Grant No.KGZD-EW-T06).

摘　　要：Interactions between incident electromagnetic energy and matter are of critical importance for numerous civil and military applications such as photocatalysis,solar cells,optics,radar detection,communications,information processing and transport et al.Traditional mechanisms for such interactions in the microwave frequency mainly rely on dipole rotations and magnetic domain resonance.In this study,we present the first report of the microwave absorption of Al/H2 treated TiO_(2) nanoparticles,where the A_(l)/H_(2) treatment not only induces structural and optical property changes,but also largely improves the microwave absorption performance of TiO_(2) nanoparticles.Moreover,the frequency of the microwave absorption can be finely controlled with the treatment temperature,and the absorption efficiency can reach optimal values with a careful temperature tuning.A large reflection loss of
58.02 dB has been demonstrated with 3.1mm TiO_(2) coating when the treating temperature is 700℃.The high efficiency of microwave absorption is most likely linked to the disordering-induced property changes in the materials.Along with the increased microwave absorption properties are largely increased visiblelight and IR absorptions,and enhanced electrical conductivity and reduced skin-depth,which is likely related to the interfacial defects within the TiO_(2) nanoparticles caused by the Al/H2 treatment.

关 键 词：Microwave absorption Black TiO_(2)nanoparticles HYDROGENATION Aluminum reduction 

分 类 号：TG1[金属学及工艺—金属学]