纳米Ni_(0.5)Zn_(0.5)Fe_2O_4铁氧体的制备及电磁损耗特性研究

Synthesis by solid state reaction and electromagnetic loss property of nanometer Ni_(0.5)Zn_(0.5)Fe_2O_4 ferrite

采用NH4HCO3与FeCl3·6H2O、Zn（NO3）2·6H2O、Ni（NO3）2·6H2O进行室温固相反应制得Fe（OH）3、Zn3（OH）4CO3·H2O、Ni3（OH）4CO3·4H2O混合前驱物，先经微波加热，再热分解制得纳米粉体。利用激光粒度分析仪、XRD、SEM和TEM对分解产物进行了表征，获得了形貌为球形、颗粒分布均匀、平均粒度为62nm、尖晶石结构的纳米Ni0．5Zn0．5Fe2O4复合铁氧体粉体。经测试样品的相对介电常数和相对磁导率后，发现该纳米铁氧体粉体在100～1800MHz内具有良好的电损耗和磁损耗性能。

The precursors of Zn3 （OH）,CO3 · H2O, Ni3（OH）,CO3 · 4H2O and Fe（OH）3 for Ni0.5Zn0.5Fe3O4 ferrite were prepared by solid-state reaction at room temperature and characterized by TG-DSC. The nanometer spinel Ni0.5 Zn0.5 Fe2O4 ferrite with the average size of 62nm was obtained by microwave heating and thermolysis at 550℃ and studied by laser granularity analyzer, XRD, SEM and TEM. The electromagnetic loss property was studied by the relative dielectric constant and relative magnetic permeability of Ni0.5 Zn0.5 Fe2O, and Zn- Fe2O4. The results show that the composite ferrite Ni0. 5 Zn0. 5Fe2O, has a better magnetic loss property than Zn- Fe2O4 at 100-1800MHz.