Microwave Absorption Properties of La_0.8Ca_0.2-xAg_xMnO₃ (x=0.05; x=0.15) Synthesized by Sol-Gel Method

Microwave absorption properties of La_0.8Ca_0.2-xAg_xMnO₃ (x= 0.05; 0.15) is reported in this paper. Lanthanum manganite materials was reported as a potential absorber material [1][2][3]. In this paper, the material was synthesized by sol-gel method, calcined at 550°C, and sintered at 900°C. The material was characterized by X-Ray Diffractometer (XRD), and we found that the materials were single phased. Through SEM-EDS characterization it is found that the materials have compositional purity. The resistivity of the materials is obtained by four point probe method, and it is shown that Ag doped decreases the resistivity of the materials. Reflection loss of La_0.8Ca_0.15Ag_0.05MnO₃ reaches -4.470 dB and La_0.8Ca_0.05Ag_0.15MnO₃ reaches - 7.953 dB.