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1篇 您的检索式:作者名="Zhoujun LING"
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1Effect of Annealing on the Microwave-absorption Properties of Ni/Al_2O_3 Nanocomposites显示文摘Ni/Al2O3 nanocomposites were prepared by the mechanochemical synthesis method.The annealing process enlarges the grain size of both the metal Ni and insulating Al2O3 in the as-milled nanocomposite and leads to an increase of the saturation magnetization and a decrease of the surface anisotropy.An optimal reflection loss(RL) of 23 dB is obtained in the as-milled nanocomposite at 17.8 GHz for an absorber thickness of 6.6 mm.The annealed sample exhibits a RL exceeding 20 dB in the whole K u-band for an absorber thickness of 6.6-9.7 mm with an optimal RL of 54.7 dB at 13.2 GHz for a layer thickness of 9.3 mm.The excellent microwave-absorption properties are a consequence of a proper match of the dielectric and magnetic losses.Songning XU Meixing ZHAO Zongqi CAI Naikun SUN Feng LIU Baosheng DU Xueyuan ZHANG Zhoujun LING 2013Acta Metallurgica Sinica(English Letters)2013,26,4:1
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