氧化锆添加量对四氧化三铁基复合材料性能的影响

The Influence of the Zirconia Content on the Properties of Ferroferric Oxide Matrix Composites

采用高能球磨法制备Fe_(3)O_(4)/ZrO_(2)复合磁性颗粒,对复合磁性颗粒的包覆机理进行深入研究。通过XRD、FT-IR、VSM、SEM等测试手段对样品的结构、光学性质、磁性能和形貌等进行表征,并将各性能进行定性和定量分析。结果表明:当ZrO_(2)含量为2.13%时,Fe_(3)O_(4)/ZrO_(2)复合材料摩擦因数的波动最稳,其硬度达最大值10.01 GPa;此外,随着ZrO_(2)含量的增加,样品的比饱和磁化强度和剩余磁化强度明显降低,复合磁性颗粒的粒径越来越大,并且出现ZrO_(2)颗粒的团聚现象。对于表面活性剂,相比于PEG2000,CTAB能使Fe_(3)O_(4)/ZrO_(2)复合磁性颗粒桥接更紧密、性能更好。因此,在表面活性剂CTAB的修饰下,ZrO_(2)加入量为2.13%时,可使Fe_(3)O_(4)/ZrO_(2)复合磁性颗粒有较好的综合性能。

Fe_(3)O_(4)/ZrO_(2)magnetic composite particles were prepared by high-energy ball milling,the principles of coating of magnetic composite particles were deeply studied.The crystalline structures,light absorption properties,magnetic properties and morphologies of composite samples were characterized using XRD,FT-IR,VSM,SEM measurement,respectively,and the properties of composite samples were analysed qualitatively and quantitatively.The results showed that the friction factor was the most stable,and the hardness reached a maximum of 10.01 GPa with the Fe_(3)O_(4)/ZrO_(2)composites containing 2.13%ZrO_(2).In addition,with the increase of ZrO_(2)content,the specific saturation magnetization and the residual magnetization of the composites decreased significantly,larger magnetic composite particles were generated,and ZrO_(2)particles agglome-ration occurred.Compared to PEG2000,the Fe_(3)O_(4)/ZrO_(2)magnetic composite particles could be more tightly linked by CTAB,so that magnetic composite particles have better performance.Therefore,the best comprehensive performance is achieved with the Fe_(3)O_(4)/ZrO_(2)composites containing 2.13%ZrO_(2)and coated CTAB.