采用改进的Hummer法制备氧化石墨烯（GO），以乙二醇为还原剂将GO还原得到RGO（Reduced graphene oxide），并通过物理共混法制备RGO/BaTiO₃复合材料。采用扫描电镜、X射线衍射、傅里叶红外、介电性能测试仪等对其表面形貌、微观结构、介电性能进行了表征。结果表明，乙二醇为还原剂成功实现了GO的还原，且还原后的RGO有效提高了RGO/BaTiO₃复合材料的介电性能。当RGO质量分数为0.5%~0.8%时，复合材料的介电常数高达140以上，比纯BaTiO₃材料提高约1.75倍，且介电损耗控制在0.2~0.45之间。

The modified Hummer method is used to prepare graphene oxide (GO),and GO is reduced by ethylene glycol into RGO (reduced graphene oxide),then RGO/BaTiO₃ composite materials are prepared by blending RGO with BaTiO₃.The surface morphology,microstructure,dielectric properties of samples are characterized by scanning electron microscopy (SEM),X-ray diffraction (XRD),Fourier infrared (FT-IR) and dielectric performance tester.The results show that GO is reduced successfully with ethylene glycol as a reducing agent.RGO improves effectively the dielectric performance of RGO/BaTiO₃ composite materials.The dielectric constant of the composite materials that contains 0.5%-0.8% of RGO exceeds 140,approximately 1.75 times higher than pure BaTiO₃,and the dielectric loss is controlled between 0.2-0.45.

罗祖云(1984-),男,博士研究生,讲师,主要研究方向为纳米材料的制备与应用,luoji886113@163.com