Microwave Absorption Performance of La0.7 Sr0.3 MnO3 with Different Sintering Temperatures

Shu Yuan Zhang; Quan Xi Cao

doi:10.4028/www.scientific.net/AMR.415-417.1399

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 415-417Microwave Absorption Performance of La0.7 Sr0.3...

Microwave Absorption Performance of La_0.7 Sr_0.3 MnO₃ with Different Sintering Temperatures

Abstract:

La _0.7 Sr_0.3 MnO ₃ powders have been synthesized at different temperatures by the traditional solid state method. The crystal structures have been characterized by X-ray diffraction (XRD). The electromagnetic parameters were measured by vector network analyzer (VNA) within the frequency range of 5.85-18GHz. It’s found that the pure perovskite structure has been obtained at the temperature of 1000°C. The bandwidth for R<-6dB became thinner with the sintering temperature’s increase from 1000°C to 1150°C, and the absorbing peak moves to the higher frequency first and low frequency then, the absorbing peak is enhanced first and weakened then.