Pseudo-binary composite of Sr_(2)TiMoO_(6)-Al_(2)O_(3)as a novel microwave absorbing material  

作　　者：Peng Wu Jun Wang Jian-Yu Li Jing Feng Wen-Ting He Hong-Bo Guo 

机构地区：[1]Faculty of Material Science and Engineering,Kunming University of Science and Technology,Kunming,650093,China [2]School of Materials Science and Engineering,Beihang University,Beijing,100191,China

出　　处：《Rare Metals》2025年第1期503-514,共12页稀有金属(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.52402078);Yunnan Major Scientific and Technological Projects(No.202302AG050010);Yunnan Fundamental Research Projects(No.202201BE070001-008);the National Key Research and Development Program of China(No.2022YFB3708600)。

摘　　要：In this work,a novel microwave absorbing material(MAM)made of a pseudo-binary of Sr_(2)TiMoO_(6)-Al_(2)O_(3)(STM)is proposed first.The MAMs labeled as STM X(X=60,70,80 and 100,respectively),in which X is the initial weight percent of Sr_(2)TiMoO_(6),were synthesized using the solid-state reaction method.Compared with STM100,some equilibrium phases,including SrTiO_(3),Mo,Sr_(8)(Al1_(2)O_(24))(MoO_(4))_(2)and a few undefined ones,are presented in the composites as evidenced by X-ray diffraction results and scanning electron microscopy due to the chemical reaction between Sr_(2)TiMoO_(6)and Al_(2)O_(3)component.Besides conductance loss,heterogeneous interfaces between various equilibrium phases introduce interfacial polarization,which causes an enhancement of dissipation for the incident electromagnetic wave.Among the synthesized samples,STM80 presents the best microwave absorbing properties.It has a minimum reflection loss(RLmin)of-26 dB and an effective absorbing bandwidth up to 2.7 GHz when the thickness is only 1 mm.This indicates that STM80 is a new type of microwave absorbing material with strong absorption and ultrathin thickness.

关 键 词：Microwave absorbing material Dielectric property Reflection loss Double perovskite ceramics Sr_(2)TiMoO_(6) 

分 类 号：TB3[一般工业技术—材料科学与工程]