不同球磨时间铁掺杂TiO_2粉的物相组成和磁性

Phase Composition and Magnetic Properties of Fe-Doped TiO_2 Powders With Different Milling Times

利用高能球磨法球磨不同时间得到不同铁掺杂量的TiO2粉,并利用电感耦合等离子发射光谱仪、X射线衍射仪、拉曼光谱仪和振动样品磁强计对粉体的物相组成和磁性能进行了分析。结果表明:球磨不仅使铁固溶进入TiO2晶格中,还诱发了TiO2从锐钛矿相向S相和金红石相的转变,粉体中未发现铁及铁的氧化物;所有粉体都表现出室温铁磁性,球磨3 h后磁性最大,随着球磨时间的延长,饱和磁化强度逐渐减小;铁掺杂金红石相的磁性大于掺杂锐钛矿相的,而铁掺杂相S的磁性能又远远大于掺杂进入前两相的。

The TiO2 powders with different Fe-doped amounts were prepared by high energy ball milling for different times.The phase composition and magnetic properties of the powders were analyzed by using inductively coupled plasma atomic emission spectrometry,X-ray diffractometer,Raman scattering spectrometer and vibrating sample magnetometer.The results show that milling not only triggered the solid solution of Fe in TiO2 lattice,but also induced the phase transformation from anatase phase to S and rutile phase in TiO2.The Fe and Fe oxides were not found in the powders.All of the powders exhibited room-temperature ferromagnetism.The magnetism reached the maximum at the milling time of 3 h,and the saturation magnetization decreased with the increasing of milling time.Fe-doped rutile phase had greater magnetism than the Fe-doped anatase phase,while the Fe-doped S phase had the greatest magnetism.