钛酸钡/还原氧化石墨烯纳米复合物的制备及其微波吸收特性  

Preparation and Microwave Absorption Properties of Barium Titanate/Reduced Graphene Oxides Nanocomposite

作　　者：陈强 刘翔[1] 谢清水 王来森[1] 彭栋梁[1] 

机构地区：[1]厦门大学材料学院,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2018年第1期18-24,共7页Journal of Xiamen University：Natural Science

基　　金：国家自然科学基金(51371154;51571167)

摘　　要：采用溶剂热法制备出BaTiO_3纳米颗粒,将不同质量的BaTiO_3纳米颗粒与氧化石墨烯(GO)进行复合,并在氩气保护下经过煅烧得到BaTiO_3/还原氧化石墨烯(BaTiO_3/RGO)纳米复合物.利用X射线衍射(XRD)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)等手段系统地表征了样品的物相结构以及表面形貌,并用矢量网络分析仪(VNA)测试样品的微波吸收特性.当制备的BaTiO_3/RGO纳米复合物中BaTiO_3的质量分数为80.9%时,纳米复合物展现了良好的微波吸收性能;当其厚度为2.0 mm时,在频率为10.48 GHz处的反射损耗达到-26.06 dB,且在9.32~11.54 GHz频段内反射损耗小于-10 dB.实验结果表明,BaTiO_3/RGO纳米复合物具有优异的电磁波吸收性能.Barium titanate( BaTiO_3) nanoparticles were synthesized by solvothermal method and then the barium titanate/reduced graphene oxides( BaTiO_3/RGO) nanocomposites with different mass ratios were obtained after calcining in argon. The structures and morphologies of samples were systematically characterized using X-ray powder diffraction( XRD),scan electron microscope( SEM) and transmission electron microscope( TEM). The microwave absorption properties of samples were tested using vector network analyzer( VNA). When the mass fraction of BaTiO_3 was 80. 9% ,the as-preparedBaTiO_3/RGO nanocomposite showed excellent microwave absorption properties,its minimum reflection loss value was -26. 06 dB at 10. 48 GHz with the thickness of 2. 0 mm,and the bandwidth of reflection loss value less than -10 dB was from 9. 32 GHz to 11. 54 GHz.The results showed that BaTiO_3/RGO nanocomposite had outstanding microwave absorption properties.

关 键 词：BaTiO3/RGO纳米复合物 溶剂热法 微波吸收特性 

分 类 号：TM25[一般工业技术—材料科学与工程] O614.2[电气工程—电工理论与新技术]