School of Materials Engineering, Yancheng Institute of Technology, Yancheng, 224051, China.
Nanoscale Res Lett. 2016 Dec;11(1):141. doi: 10.1186/s11671-016-1340-x. Epub 2016 Mar 12.
Strontium ferrite nanoparticles were prepared by a coprecipitation method, and reduced graphene oxide/strontium ferrite/polyaniline (R-GO/SF/PANI) ternary nanocomposites were prepared by in situ polymerization method. The morphology, structure, and magnetic properties of the ternary nanocomposites were investigated by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), TEM, Raman, and VSM. The microwave-absorbing properties of the composites were measured by a vector network analyzer. The XRD patterns show the single phase of strontium hexaferrite without other intermediate phases. TEM photographs reveal that strontium ferrite nanoparticles are uniformly dispersed on the surfaces of R-GO sheets. The R-GO/SF/PANI nanocomposite exhibited the best absorption property with the optimum matching thickness of 1.5 mm in the frequency of 2-18 GHz. The value of the maximum RL was -45.00 dB at 16.08 GHz with the 5.48-GHz bandwidth. The excellent absorption properties of R-GO/SF/PANI nanocomposites indicated their great potential as microwave-absorbing materials.
锶铁氧体纳米颗粒采用共沉淀法制备，还原氧化石墨烯/锶铁氧体/聚苯胺（R-GO/SF/PANI）三元纳米复合材料采用原位聚合法制备。采用 X 射线粉末衍射（XRD）、傅里叶变换红外光谱（FT-IR）、TEM、Raman 和 VSM 研究了三元纳米复合材料的形貌、结构和磁性能。通过矢量网络分析仪测量了复合材料的微波吸收性能。XRD 图谱表明，六方锶铁氧体具有单一相，没有其他中间相。TEM 照片表明，锶铁氧体纳米颗粒均匀分散在 R-GO 片的表面上。R-GO/SF/PANI 纳米复合材料在 2-18GHz 频率下具有最佳匹配厚度 1.5mm 时表现出最佳的吸收性能。在 16.08GHz 时，最大 RL 值为-45.00dB，带宽为 5.48GHz。R-GO/SF/PANI 纳米复合材料具有优异的吸收性能，表明它们作为微波吸收材料具有巨大的潜力。
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