共沉淀水热法制备锰锌铁氧体纳米晶及其表征

Preparation and Characterization of Mn Zn Ferrite Nanocrystalline with Coprecipitation-Hydrothermal Synthesis

本研究采用成本低,污染少的共沉淀法制备锰锌铁氧体前驱体后再采用水热法制备出最终的纳米锰锌铁氧体粉末。利用X-射线衍射（XRD）、透射电镜（TEM）、复磁导率等测试手段对材料的形貌、粒径、和吸波性能进行了表征和分析。研究反应物的种类及配比对锰锌铁氧体吸波性能的影响,当反应物采用氯化锰、氯化锌、氯化铁,m（Mn）∶m（Zn）∶m（Fe）=4∶1∶10,得到Mn0.8Zn0.2Fe2O4粒子,透射电镜分析表明,其粒子呈球状,粒径在10-20 nm。网络矢量分析仪表明,当吸收厚度为2 mm时,锰锌铁氧体材料的吸波性能最佳。

The MnZn ferrite powder which was formed by precursor slurry using coprecipitation, was prepared by a hydrothermal synthesis method with low cost and pollution. Then the particle size, morphology and absorbing properties of the nano particles also have been characterized by the method of X-ray diffractometer（XRD）, transmission electron microscopy（TEM） and complex permeability. Factors such as different types of reactants and ratio of reactants are taken into account, effects of absorbing properties of the nano ferrite particles are discussed, when taking Manganese chloride, Zinc chloride and Ferric chloride as the reactants with a proportion of m （Mn） ： m （Zn） ： m （Fe） = 4：1 ： 10, preparing Mn0.8 Zn0.2Fe2O4 nanoparticles. TEM results showed that the Mn0.8Zn0.2Fe2O4 nanoparticles were 10-20 nm, Vector Network Analyzer results showed that when the thickness of the absorbent is 2 mm, absorbing properties of Mn-Zn ferrite material is the best.