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第 35 卷第 10 期                            精   细   化   工                                 Vol.35, No.10
             2018 年 10 月                             FINE CHEMICALS                                Oct.   2018


              功能材料
                 石墨烯/Fe O /FeSiAl 复合材料的制备及吸波性能
                                   3
                                        4

                                       金   丹，郭宇鹏，孙可为，丁东海

                                   （西安建筑科技大学  材料与矿资学院，陕西  西安  710055）


                 摘要：以 FeSiAl 片状磁粉、膨胀石墨为主要原料，采用水热法制备石墨烯/Fe 3 O 4 /FeSiAl 复合材料。通过 XRD、
                 SEM、Raman、FTIR 和矢量网络分析仪（VNA）对石墨烯/Fe 3 O 4 /FeSiAl 复合材料的晶相、微观形貌和吸波性能
                 进行了表征和分析。结果表明：通过水热还原法，将氧化石墨烯还原成石墨烯，并且生成的石墨烯及 Fe 3 O 4 颗
                 粒均匀包覆在 FeSiAl 片状磁粉上，这种片状和颗粒状不同结构的复合，制备出了兼具磁损耗和介电损耗的吸波
                 材料。在 0.2~2.66 GHz 频段内，当氧化石墨烯和 FeSiAl 质量比为 1∶9，相应匹配厚度为 2 mm 时，石墨烯/Fe 3 O 4 /FeSiAl
                 复合材料在 2.56 GHz 处最小反射率可达到–17 dB，其有效吸收频带范围（反射率小于–10 dB）为 2.27~2.66 GHz。
                 随着氧化石墨烯与 FeSiAl 质量比的增加，石墨烯/Fe 3 O 4 /FeSiAl 复合材料的有效吸收频带向高频移动，有助于该
                 吸波材料在高频段的应用。
                 关键词：石墨烯；FeSiAl；水热法；Fe 3 O 4 ；复合吸波材料；功能材料
                 中图分类号：TB34      文献标识码：A     文章编号：1003-5214 (2018) 10-1647-06



                               Preparation and Absorbing Properties of Graphene/
                                             Fe 3O 4/FeSiAl Composites

                                    JIN Dan, GUO Yu-peng, SUN Ke-wei, DING Dong-hai
                  （College of Materials and Mineral Resources, Xi'an University of Architecture and Technology, Xi'an 710055, Shaanxi, China）

                 Abstract: Graphene/Fe 3O 4/FeSiAl composites were prepared  by hydrothermal method  using FeSiAl
                 magnetic flakes and expanded graphite as main raw materials. The crystal phase, microstructure and wave
                 absorbing property of the obtained composites were characterized by XRD, Raman, SEM, FTIR and vector
                 network analyzer (VNA).  The  results indicated that graphene oxide was reduced to graphene  by
                 hydrothermal method. FeSiAl magnetic flakes were coated evenly by the graphene and Fe 3O 4 particles. This
                 absorbing material with both magnetic loss and dielectric loss could be realized by composite of flaky and
                 granular.  In the frequency range from 0.2  GHz to  2.66  GHz,  for the  graphene/Fe 3O 4/FeSiAl composite
                 prepared with a mass ratio of 1∶9 (graphene oxide to FeSiAl), the minimum reflection loss was up to –17
                 dB at 2.56 GHz with a thickness of 2 mm, and the effective absorption band of RL less than –10 dB was
                 from 2.27 GHz to 2.66 GHz. Furthermore, as the mass ratio of graphene oxide to FeSiAl increased, the
                 effective absorption  band of graphene/Fe 3O 4/FeSiAl composite  moved  to higher frequency,  which was
                 helpful for the application of this absorbing material in high frequency band.
                 Key words:  graphene; FeSiAl; hydrothermal  method;  Fe 3O 4; composite absorbing  material; functional
                 materials
                 Foundation items: National Natural Science  Foundation  of China (51502236); Natural Science  Basic
                 Research Plan in Shaanxi Province of China (2016JM5062)



                 随着电子信息技术的飞速发展，各式各样的电                          妨碍了电子信息工业的稳定发展               [1-2] 。同时为适应现
            子产品在满足人们需要的同时，大量的电磁波辐射                             代战争的需要，隐身材料在武器中广泛的应用，使
            也造成了电磁污染、电磁干扰、泄密等棘手问题，                             得研究吸波性能优异的材料具有迫切的现实需要                    [3-4] 。


                 收稿日期：2017-11-29;  定用日期：2018-03-27; DOI: 10.13550/j.jxhg.20170971
                 基金项目：陕西省自然科学基础研究计划-面上项目（2016JM5062）；国家自然科学基金青年基金（51502236）
                 作者简介：金   丹（1965—），女，副教授，硕士，E-mail：jindan@xauat.edu.cn。
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