Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Synthesis, Characterization, and Microwave Absorption Property of the SnO2 Nanowire/Paraffin Composites | Nanoscale Res Lett 2009 4 1452-1457 DOI s11671-009-9419-2 NANO EXPRESS Synthesis Characterization and Microwave Absorption Property of the SnO2 Nanowire Paraffin Composites H. T. Feng R. F. Zhuo J. T. Chen D. Yan J. J. Feng H. J. Li S. Cheng Z. G. Wu J. Wang P. X. Yan Received 18 June 2009 Accepted 12 August 2009 Published online 18 September 2009 to the authors 2009 Abstract In this article SnO2 nanowires NWs have been prepared and their microwave absorption properties have been investigated in detail. Complex permittivity and permeability of the SnO2 NWs paraffin composites have been measured in a frequency range of GHz and the measured results are compared with that calculated from effective medium theory. The value of maximum reflection loss for the composites with 20 vol. SnO2 NWs is approximately dB at 14 GHz with a thickness of mm. Keywords Nanowires Permittivity Microwave absorption Effective medium theory Introduction In recent years electromagnetic EM wave absorbing materials have aroused great interest because of more and more civil commercial and military applications in electromagnetic interference EMI shielding and radar cross section RCS reduction in the gigahertz GHz band range 1 2 . Traditionally EM wave absorbing materials which are composed of magnetic metals or alloys particles are H. T. Feng R. F. Zhuo J. T. Chen D. Yan J. J. Feng H. J. Li S. Cheng Z. G. Wu J. Wang P. X. Yan H School of Physical Science and Technology Lanzhou University 730000 Lanzhou China e-mail pxyan@ P. X. Yan State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemistry and Physics Chinese Academy of Science 730000 Lanzhou China restricted in application because of high specific gravity and formulation difficulty. It is hence desirable to have microwave absorbing materials that are lightweight structurally sound and flexible and show good microwaveabsorbing ability in a wide frequency range. In terms of these criteria .
