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。

Phase relations for Fe-Ti-Zr ternary system at 1023K have been investigated by means of diffusion triple together with electron probe microanalysis technique, a series of tie-lines and tie-triangles have been determined and the isothermal section at 1023K has been established, and seven three-phase fields have been figured out. It was found that all of the Fe-Zr and Fe-Ti binary phases show large ternary solubility, and Zr and Ti can substitute for each other to a certain degree. The largest solid solubility of Ti in Fe2Zr and in FeZr3 is about 8.5 at.% Ti and 35.7 at.% Ti, and of Zr in Fe2Ti and FeTi is about 5.6 at.% Zr and 6.3 at.% Zr, respectively. The solubility range of Fe2Ti, FeTi, Fe2Zr and FeZr3 is 64.9 72.7 at.% Fe, 46.6-49.1 at.% Fe, 65.8-71.7 at.% Fe and 20.9-24.3 at.% Fe, respectively. No ternary compound was found.

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.

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 isothermal section of the phase diagram of the Co-Ni-Zr ternary system at 1198 K has been investigated by means of diffusion triple and electron microprobe analysis. This isothermal section consists of six threephase regions. The homogeneity ranges of Co23Zr6, Co2Zr, CoZr, Ni5Zr, Ni7Zr2 and NiZr are about 16.7%-18.8 at.%Zr, 28.6%-32.3 at.%Zr, 49.2%-51.7 at.%Zr, 16.0%-18.7 at.%Zr, 22.3%-24.1 at.%Zr and 49.8%-52.1 at.%Zr, respectively; CoZr2 and NiZr2 are nearly linear compounds. The largest olubilities of Ni in Co23Zr6, Co2Zr and CoZr are about 4.9 at.%Ni, 5.4 at.%Ni and 4.5 at.%Ni, respectively. CoZr2 and NiZr2 form a continuous solid solution (Co,Ni)Zr2. No ternary compound is observed.