Papers by Author: Jing Lan Deng

Abstract: Three-layer Absorbing Structure Composite Material Was Designed According to Impedance-matching and Attenuation Principles. in this Construction the Surface Layer Contained MnO2, the Intermediate Layer Fe(CO)5 , and the Bottom Layer Graphite. the Effects on the Wave Absorbing Properties of Varying the Absorbing Agent Content in each Layer of Three-layer Plates Were Investigated by Orthogonal Experiment. the Results Showed the Optimal Composition of Absorption Peaks Occurred with a Content of MnO2 in the Surface Layer of 30Wt%, a Content of Fe(CO)5 in the Intermediate Layer of 20Wt%, and a Content of Graphite in the Bottom Layer of 40Wt%. this Combination Produced a Peak Absorption of -29.05 Db. the Optimal Composition for Wider Bandwidth Occurred with a Content of MnO5 in the Surface of 10Wt%, a Content of Fe(CO)5 in the Intermediate Layer of 20Wt%, and a Content of Graphite in the Bottom Layer of 40Wt%. Further in-depth Study Will Research Optimization of both Factors to Gain Greater Absorption Peaks and Wider Bandwidth. the Findings of this Research Will Have Value in Engineering Applications of Functional Composite Materials.

Abstract: Microwave absorbing material is currently being more and more widely applied in the world. However, conventional absorbent coating material cannot fulfill the complex current requirements of science and technology to have a wide absorption frequency band, and high absorption. This paper describes composite material plates with a multi-layer absorbing structure designed according to impedance-matching and attenuation principles, producing two- and three-layer absorbing structures. Twelve samples were made, containing graphite powder and manganese dioxide at varying concentrations. The results show that in the frequency range 8-18 GHz, the peak absorption of double-layer samples is -12.3dB, the effective bandwidth (R < -10 dB) is 1.8GHz. The absorption peak of three-layer samples is -18 dB, and the effective bandwidth (R < -10 dB) is 8GHz. The findings of this research are useful in improving the absorption bandwidth of absorbing material.