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Preparation and Electromagnetic Properties of Composites of Hollow Glass Microspheres Coated with NiFe2O4 Nanoparticles
Hai-tao Zhao*, Rui-ting Ma, Gang Zhang, Xuan Xiao
School of Materials Science and Enginering, Shenyang Ligong University, Shenyang 110168, China
Abstract:
"The composites of hollow glass microspheres coated with NiFe2O4 nanoparticles were prepared using polyacrylamide gel method. The structural characteristics, morphology and electromagnetic properties of the composite powders with different weight percent of glass microspheres (15%, 40%, and 65%) were obtained by X-ray diffraction, scanning electron microscope, infrared spectroscopy and HP8510 network analyzer. The results indicated that the phase structure of composite powders was the mixtures of nickel ferrite, quartz, and mullite. The peak intensity for nickel ferrite decreased rapidly and for mullite increased remarkably with the increasing amount of microspheres. A pure spinel structure of NiFe2O4 formed on the glass microspheres at 600 oC. A uniform and continuous NiFe2O4-coating was obtained when the content of microspheres was 40%. A great amount of NiFe2O4 particle size is less than 80 nm. The composite with a content of 40% microspheres exhibits better dielectric and magnetic loss properties which are useful to absorb more electromagnetic wave. It can be a kind of good and light electromagnetic wave absorbing material in the X-band."
Key words:  NiFe2O4 nanoparticle, Hollow glass microsphere, Dielectric and magnetic loss, Polyacrylamide gel method
FundProject:
包覆镍铁氧体纳米粒子的空心玻璃微珠复合材料的制备与电磁性能研究
赵海涛*, 马瑞廷, 张罡, 肖旋
沈阳理工大学材料科学与工程学院,沈阳l10168
摘要:
"用高分子凝胶法制备了包覆镍铁氧体纳米粒子的空心玻璃微珠复合材料.玻璃微珠含量为25%、50%和75%的复合粉的结构、表面形貌和电磁性能分别用X射线衍射仪、扫描电镜、能谱仪、红外光谱和HP8510网络分析仪来表征.结果表明,复合粉由镍铁氧体、石英和莫来石相组成.随着微珠含量的增加,镍铁氧体衍射峰强度迅速降低,莫来石衍射峰强度迅速增强.当温度达到800 ℃时,纯尖晶石结构的镍铁氧体在玻璃微珠表面生成.当玻璃微珠含量为50%时可获得均一、连续的镍铁氧体涂层.大部分镍铁氧体粒子的尺寸小于80 nm.玻璃微珠含量
关键词:  镍铁氧体纳米粒子,空心玻璃微珠,电磁损耗,高分子凝胶法
DOI:10.1088/1674-0068/20/06/801-805
分类号: