自反应喷射成形法制备Mn-Zn铁氧体多孔微球研究  

Research on Mn-Zn Ferrite Porous Microspheres Prepared by Self-reactive Spray Forming Technology

作　　者：高海涛[1] 王建江[1] 许宝才[1] 娄鸿飞[1] 蔡旭东[1] 

机构地区：[1]军械工程学院先进材料研究所,河北石家庄050003

出　　处：《热加工工艺》2016年第2期76-78,83,共4页Hot Working Technology

基　　金：国家自然科学基金资助项目(51172282);武器装备预研基金资助项目(9140A12040211JB34)

摘　　要：以Fe、MnO_2、Fe_2O_3和ZnO为反应体系,采用自反应喷射成形技术制备Mn-Zn铁氧体多孔微球材料,并研究了多孔微球的吸波性能及影响因素。通过SEM、XRD和网络矢量分析仪等设备分析了多孔微球的物相组成、形貌特征、电磁参数和吸波性能。结果表明,微球形状规则,表面粗糙多孔,粒径在100μm,由单一尖晶石型Mn_(0.5)Zn_(0.5)Fe_2O_4相组成。多孔微球的吸波性能良好,在13 GHz附近出现吸收峰,最高峰值达到-16d B;低于-8 d B的频率带宽达到4GHz。微球中多孔的结构特点和锰锌铁氧体的介电损耗是微球吸波的主要原因。Mn-Zn铁氧体多孔微球材料具有良好的吸波性能,值得推广应用。Taking Fe, MnO2, Fe2O3 and ZnO as reaction system, Mn-Zn ferrite porous microspheres were prepared by self-reactive spray forming technology. The absorbing property of porous microspheres and its influence factors were studied. The phase composition, morphology characteristic, eletromagnetic parameters and absorbing property of porous microspheres were tested by SEM, XRD and network analyzer. The results show that the microspheres shape is regular. The surface is rough and porous. The diameters is 100 μm, which is constituted by pure Mn0.5Zn0.5Fe2O4 phase with spinel crystal structure. The porous microspheres have better absorbing property. The maximum value of microwave reflection loss is -16 dB at 13GHz and the frequency is 4 GHz where the microwave absorption is less than -8 dB. The characteristic of hollow and muttiporous in microspheres and dielectric loss of manganese zinc ferrite contribute to absorption property. Mn-Zn ferrite porous microspheres have preferable absorbing property, which is worthy of further study.

关 键 词：自反应喷射成形 MN-ZN铁氧体 多孔微球 

分 类 号：TG113.2[金属学及工艺—物理冶金]