搜索结果: 16-22 共查到“复合材料 Fe3O4”相关记录22条 . 查询时间(0.078 秒)
纳米Fe3O4/BaTiO3复合体系的微波吸收特性
微波吸收 BaTiO3 Fe3O4 复合体系
2009/8/28
研究了纳米Fe3O4和BaTiO3及其复合体系在2~18 GHz频率范围内的微波吸收性能,并分析了其吸收机制以及复合组分对吸波性能的影响。研究结果表明,通过调节材料组分可调节电磁参数及吸收峰的位置,复合体系的有效吸收频带较单一材料的吸附频带变宽。单一组分的纳米Fe3O4和BaTiO3都有2个吸收峰。在复合体系中,多个吸收峰发生重叠。这2种材料的微波吸收能力随电磁波频率的变化而规律不同,当频率低于1...
Fabrication and characterization of photocatalytic activity of Fe3O4-doped CdS hollow spheres
Magnetic materials Nanostructures Semiconductors
2009/3/29
A new hollow sphere photocatalyst has been fabricated by combining Fe3O4 with nanoparticulate CdS. Their microstructures and photocatalytic behavior were examined by X-ray powder diffraction,transmiss...
Magnetically Separable Fe3O4/TiO2 Hollow Spheres: Fabrication and Photocatalytic Activity
Magnetic separation hollow spherical titanium dioxide mixed catalyst benzyl propionate particle size transmission electron microscopy
2008/11/10
Well-defined magnetic separable, hollow spherical Fe3O4/TiO2 hybrid photocatalysts were successfully prepared through a poly(styrene-acrylic acid) (PSA) template method. This bifunctional product was ...
Preparation of superparamagnetic Fe3O4/PMMA nano composites and their magnetorheological characteristics
Fe3O4/PMMA composite Hydrothermal Magnetorheological fluids
2008/1/14
Fe3O4/PMMA composite particles were fabricated by a simple one-pot hydrothermal method. The magnetic measurement showed
that the composite particles displayed a higher saturated magnetization and sup...
Fe3O4颗粒对硼酸铝晶须增强铝复合材料热膨胀行为的影响
Fe3O4颗粒 硼酸铝晶须 铝复合材料
2007/11/9
文章摘要：
硼酸铝晶须增强铝复合材料中加入Fe3O4颗粒可以降低该复合材料的热膨胀系数。研究认为复合材料中Fe3O4颗粒在制备过程中部分被氧化，在热膨胀测试过程中被氧化的Fe3O4又被还原, 其体积将变小, 基体铝的膨胀受到限制, 相当于具有负膨胀系数性质,从而起到了降低复合材料热膨胀系数的作用。结合复合材料中Fe3O4磁场热重曲线分析，阐述了颗粒的残余应力在热循环中的变化情况...
Preparation and characterization of microsized FeCO3, Fe3O4 and Fe2O3 with ellipsoidal morphology
Ellipsoidal Magnetic Microsized Hydrothermal Heating treatment
2007/6/3
Ellipsoidal FeCO3 microcrystals with length of 5–6.5 mm and width of 2.5–3.5 mm have been synthesized by an ascorbic acid assisted hydrothermal process. Both microsized ellipsoidal Fe2O3 and Fe3O4 m...
A facile method to fabricate carbon-encapsulated Fe3O4 core/shell composites
Carbon - encapsulated Fe3O4 nuclear shell composite materials glucose alkaline glucose carbonization
2007/1/3
One-step synthesis of carbon-encapsulated Fe3O4 core/shell composites is reported. The Fe3O4 cores were formed via the reduction of Fe3+ by glucose under alkaline conditions obtained by the decomposit...