Effects of BaFe12O19 Microfibers on Magnetic and Tribological Behaviour of BaFe12O19/PVDF Composites

来源 :2011中国功能材料科技与产业高层论坛 | 被引量 : 0次 | 上传用户:seacowo
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
  Barium ferrite microfibers/poly (vinylidene fluoride) (BaFe12O19/PVDF) composite films were prepared by the solution casting process.The X-ray diffraction analysis indicates the BaFe12O19 microfibers incorporation can induce the crystal form of PVDF transformed from α-to β-form.Magnetization measurements for the composite films by vibrating sample magnetometer exhibit that the BaFe12O19/PVDF composite films possess a hard magnetic characteristic and the magnetization is related to the BaFe12O19 microfibers content.The addition of BaFe12O19 microfibers can stabilize the friction coefficient of PVDF matrix and the tribological properties of the composite films can be improved for appropriate BaFe12O19 microfibers content (< 20 wt%) in the composite.
其他文献
随着材料合成技术的进步,各种新型的气敏材料被不断地开发报道,这些材料通常具有高的比表面积、有序的孔道分布、良好的电信号传输能力等特点,因此表现出高灵敏度、快响应恢复及良好的稳定性、选择性等性质,从而成为了气敏研究的热点.本文比较了使用不同的测试方法所获得的同种气敏材料的性能参数,分析了造成这些差异的原因,从而为针对新型气敏材料的性能测试提供了参考.
制备了三组重晶石水泥基材料,并对三组材料对14.8MeV快中子的衰减效应进行了测试,结果表明:重晶石水泥基材料与空白组相比,8mm厚时,对14.8MeV快中子的衰减比略微有上升趋势,40mm厚时,对14.8MeV快中子的衰减比略微有下降趋势;随着重晶石含量的增加,特别是40mm厚样品对14.8MeV快中子的衰减比有明显增强效果;所有样品随着样品厚度的增加,对14.8MeV快中子的衰减比有增大的趋势
The molecular dynamics simulation studies on the microstructure evolution properties of liquid Ca-Mg alloys during the rapid solidifications have been performed.The simulated structure factor S(q) of
本文以聚碳硅烷(PCS)为原料,采用静电纺丝技术制备了β-SiC/SiO2微米纤维,着重探讨了在料液中添加四丁基溴化铵/N,N-二甲基甲酰胺(TBAB/DMF)溶液对前驱体纤维形貌的影响,优选了前驱体的不熔化处理时间,研究了β-SiC/SiO2纤维的光致发光性能.采用扫描电镜(SEM)、傅立叶红外光谱(FT-IR)、X射线粉末衍射(XRD)和光致发光光谱(PL)等测试手段对产物进行了表征.结果表明
P-type Bi0.5Sb1.5Te3 thermoelectric crystals with various percentage of Te (x=0.00-3.00 wt.%) were prepared by gradient freeze method.By doping Te content differently and fabrication processes,the ant
Anatase TiO2 particles of about 20 nm in the diameter were successfully synthesized with Ti(SO4)2 as titanium source and stronger ammonia water as precipitant at 240℃ for 48 h with pH=5 using the hydr
MoO3 submicrobelts with the radial direction of less than 500 nm were successfully synthesized with ammonium paramolybdate as molybdenum source and nitric acid as precipitant at 240 ℃ for 48 h with pH
在不同压紧压力条件下得到不同装填密度的改性纤维球与纤维球过滤器,本文对纤维球过滤器和金属多孔膜去除油气田回注污水中油份和悬浮物进行了研究.实验结果表明在相同压紧压力下改性纤维球装填密度、吸附原水量明显大于未改性纤维球,且高密度的改性纤维球表现出去除油份能力显著,但去除悬浮物效果不明显,金属多孔膜表现出稳定的去除油份及悬浮物的能力.
本文采用挂浆法和粉末冶金工艺制备镍基合金空心球.探讨了原始合金粉末、造孔模板、粉浆粘度、烧结工艺等对空心球的结构形成的影响规律.实验结果表明,非球形粉末的原始粒度越小,毛坯球表面越均匀、光滑,球壳壁厚越薄,烧结后空心球壳孔隙率越少,强度越高;直径约为3mm的聚苯乙烯球有利于制得球壳均匀、孔隙率较低的空心球;粘结剂的浓度越大、液固比越大,涂覆的毛坯球的壁厚也就越大,不同浓度的粘结剂选择合适的液固比,
纳/微米结构功能及其复合材料在锂离子电池、催化、驱动器件、传感器、智能变色窗口与器件,超级电容器等领域有许多重要的应用.为获得性能调控,具有特异形貌纳/微米结构功能及其复合材料适用于不同领域的应用,采用水热方法制备了可控形貌的低维钒氧化物.考察了数种典型软模板的存在对其形貌的影响.采用扫描电镜(SEM),透射电镜(TEM),X-射线衍射(XRD),傅里叶红外(FTIR)等进行了相应表征.结果表明,