Synthesis and magnetic properties of hard magnetic (CoFe2O4)-soft magnetic (Fe3O4) nano-composite ceramics by SPS technology
Synthesis and magnetic properties of hard magnetic (CoFe2O4)-soft magnetic (Fe3O4) nano-composite ceramics by SPS technology
复制标题
SPS技术合成硬磁(CoFe2O4)-软磁(Fe3O4)纳米复合陶瓷及其磁性能
DOI：
10.1016/j.jmmm.2011.02.014
复制
发表时间：
2011-07-01
影响因子：
2.7
通讯作者：
Ruan, Xuefeng
中科院分区：
文献类型：
--
作者：
Fei, Chunlong;Zhang, Yue;Ruan, Xuefeng
采用放电等离子烧结法制备了CoFe 2 O 4/Fe 3 O 4纳米复相陶瓷。X射线衍射分析表明，当烧结温度低于900 ℃时，所有样品均由CoFe 2 O 4和Fe 3 O 4相组成。结果表明，烧结温度对磁性能有很大的影响。在低于500 ℃烧结的样品中，磁滞回线呈现两级台阶，当烧结温度达到500 ℃时，台阶消失，表明CoFe_2 O_4和Fe_3 O_4之间存在良好的交换耦合。随着烧结温度从500 ℃升高到800 ℃，X射线衍射结果表明，由于CoFe_2O_4/Fe_3O_4相界面处的离子扩散，晶化区收缩，对磁性能有很大影响。(C)2011年爱思唯尔B。V.保留所有权利。
CoFe2O4/Fe3O4 nano-composite ceramics were synthesized by Spark Plasma Sintering. The X-ray diffraction patterns show that all samples are composed of CoFe2O4 and Fe3O4 phases when the sintering temperature is below 900 degrees C. It is found that the magnetic properties strongly depend on the sintering temperature. The two-step hysteresis loops for samples sintered below 500 degrees C are observed, but when sintering temperature reaches 500 degrees C, the step disappears, which indicates that the CoFe2O4 and Fe3O4 are well exchange coupled. As the sintering temperature increases from 500 to 800 degrees C, the results of X-ray diffractometer indicate the constriction of crystalline regions due to the ion diffusion at the interfaces of CoFe2O4/Fe3O4 phases, which have great impact on the magnetic properties. (C) 2011 Elsevier B. V. All rights reserved.