Preparation and properties of ferrite derived from iron oxidizing bacteria  

作　　者：ZHANGWenQiang CAIJun ZHANGDeYuan 

机构地区：[1]BionicandMicro/Nano／BioManufacturingTechnologyResearchCenter,BeihangUniversity,Beijing100191,China

出　　处：《Chinese Science Bulletin》2012年第19期2470-2474,共5页

基　　金：supported by the National Natural Science Foundation of China (50805005);the National High-tech R&D Program of China(2009AA043804);the Foundation for the Author of National Excellent Doctoral Dissertation of China (2007B32);the Innovation Foundation of BUAA for PhD Graduates

摘　　要：The growth characteristics of Sphaerotilus natans and Leptothrix discophora SS-1(ATCC43182) were first used to fabricate the ferrite and manganese ferrite.The scanning electron microscopy(SEM),energy dispersive X-ray spectrometry(EDS),X-ray diffraction(XRD),and vibrant sample magnetometer(VSM) were used to make clear their morphology microstructure,chemical composition,crystal structure,and magnetostatic characteristic.The result showed that the hollow ferrite fibers were prepared successfully,whose crystal structures were close to α-Fe2O3 and the average aspect ratio was over 50.Moreover,the soft magnetic manganese ferrite was fabricated with the saturation magnetization Ms at 25 emu/g and coercive force Hc at 796 A/m.The growth characteristics of Sphaerotilus natans and Leptothrix discophora SS-1 （ATCC43182） were first used to fabricate the ferrite and manganese ferrite. The scanning electron microscopy （SEM）, energy dispersive X-ray spectrometry （EDS）, X-ray dif- fraction （XRD）, and vibrant sample magnetometer （VSM） were used to make clear their morphology microstructure, chemical composition, crystal structure, and magnetostatic characteristic. The result showed that the hollow ferrite fibers were prepared successfully, whose crystal structures were close to ct-Fe203 and the average aspect ratio was over 50. Moreover, the soft magnetic manganese ferrite was fabricated with the saturation magnetization Ms at 25 emu/g and coercive force Hc at 796 A/re.

关 键 词：铁氧化细菌 制备 铁素体 扫描电子显微镜 性能 X射线光谱仪 饱和磁化强度 晶体结构 

分 类 号：Q93[生物学—微生物学]