会议专题

Infrared Emissivities and Microwave Absorption Properties of Perovskite La1-xCaxMnO3 (0<x<0.5)

  La1-xCaxMnO3 (0<x<0.5) with perovskite-type structure has been successfully prepared by sol-gel method as a microwave and infrared multi-functional material.The effects of Ca incorporation on the stucture, electrical conductivity, infrared emissivity and microwave-absorbing properties were investigated in detail by XRD, 4-point probes resistivity measurement system, IR-2 infrared-emissivity analyzer and vector network analyzer.XRD results show that the perovskite structure of LaMnO3 is hardly changed when the doping concentration (x) of Ca2+ is less than or equal to 0.5.The incorporation of Ca in LaMnO3 leads to the decrease of electrical conductivity,while the infrared emissivities are decreased.Moreover, microwave-absorbing properties in the frequency range of 2-18 GHz are sensitive to Ca content.The optimal reflection loss calculated from the measured permittivity and permeability is 42 dB at 10.5 GHz with a thickness of 2.0 mm when the doping amount of Ca2+ is 0.1.It is possible to make Ca-doped lanthanum manganites achieve compatible camouflage capability for radar and infrared wave-band.

Iron incorporation Electrical conductivity Infrared emissivity Microwave absorbing

Jia Wei Liu Jian Jiang Wang Hai Tao Gao

Advanced Material Institute, Ordnance Engineering College, Shijiazhuang 050003, China

国际会议

The 9th China Functional Materials Technology and Industry Forum (9th CFMTIF 2017)(第九届中国国际功能材料科技与产业高层论坛)

银川

英文

96-101

2017-08-16(万方平台首次上网日期,不代表论文的发表时间)