以δ-FeOOH为前驱体，采用沸腾回流法直接合成了尖晶石结构的MnZn铁氧体纳米颗粒。用X射线衍射仪（XRD）、透射电镜（TEM）和振动样品磁强计（VSM）对其相成分、显微结构和磁性能进行了表征。详细探讨了共沉淀的pH值和回流反应时间对生成物化学组成和磁性能的影响。结果表明，通过调节pH值和回流时间可以得到从小于10nm到大于20nm不同粒径的锰锌铁氧体颗粒，获得完全产物的最佳回流时间为6h。pH值对反应剧烈程度及磁性能有很大影响，共沉淀pH值为13.0左右时获得的制备态纳米粉末尺寸为20nm，饱和磁化强度达46A·m2/kg。

以市售YF30铁氧体预烧料为基料，采用陶瓷法制备了La-Co掺杂的M型锶铁氧体Sr1－xLaxFe12－xCoxO19（x=0-0.21）。通过X射线衍射和MATEST-2010H永磁（稀土）磁性材料自动测量仪研究La-Co掺杂量对材料结构与磁性能的影响。结果表明，在1210℃烧结时，Sr1－xLaxFe12－xCoxO19（x=0-0.21）均为单一的磁铅石相结构，适量La-Co掺杂明显改善了M型锶铁氧体的内禀磁性能；在1195℃烧结时，Sr1－xLaxFe12－xCoxO19锶铁氧体在x=0.15处获得最佳磁性能：Br=410mT，Hcj=358.0kA/m，(BH)max=32.2kJ/m3。

The effect of a variation in Si and N concentration on the microstructure, crystal structure and high-frequency magnetic properties of Fe-Co-Si-N nanogranular thin films was investigated. The films, prepared by rf magnetron sputtering, consisted of nanosized grains of FeCo as well as a Si and N rich intergranular amorphous phase. The Si concentration had a significant effect on the crystal structure of the FeCo phase. The resistivities of the Fe-Co-Si-N films were significantly enhanced by an increase in Si concentration. The resonant frequency of the Fe-Co-Si-N films could be tuned from 0.45 GHz to 2.1 GHz by controlling Si concentration. The N concentration greatly influenced magnetic properties and the variation in resonant frequency is in agreement with Kittel's equation.

通过湿法预处理，用偶联剂KH-570对羰基铁粉进行表面改性，制备了综合性能较好的并用橡胶基实用型磁敏橡胶，研究了羰基铁粉含量对天然橡胶/丁苯橡胶（NR/SBR）并用橡胶基磁敏橡胶性能的影响；同时利用扫描电镜研究了改性羰基铁粉表面和磁敏橡胶复合材料断面的微观结构。结果表明，通过偶联剂改性的羰基铁粉其晶体结构未发生变化，且表面有一层致密的包覆层；以NR/SBR并用橡胶为基体的磁敏橡胶，当羰基铁粉用量为300份时，可表现出较好的机械性能和磁流变效应。

The Fe–Er binary system has been assessed by combining CALPHAD method with Miedema approach. Liquid is treated as a substitutional solution phase, of which the excess Gibbs energies are modeled by a Redlich–Kister polynomial function. The binary intermetallic compounds are treated as stoichiometric phases. Thermodynamic parameters of various phases have been optimized and the calculated results are in reasonable agreement with experimental data.