压力对纳米CoFe2O4/SiO2复合材料结构的影响

李季; 王丽; 贾晓鹏; 李海波

doi:10.11858/gywlxb.2013.01.003

压力对纳米CoFe2O4/SiO2复合材料结构的影响

doi: 10.11858/gywlxb.2013.01.003

李季¹,
王丽¹,
贾晓鹏²,
李海波^1, ,

1.
吉林师范大学功能材料物理与化学教育部重点实验室，吉林四平 136000；
2.
吉林大学超硬材料国家重点实验室，吉林长春 130012

详细信息

通讯作者:
李海波 E-mail:lihaibo@jlnu.edu.cn

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出版历程
- 收稿日期: 2011-08-25
- 修回日期: 2012-03-14
- 发布日期: 2013-02-15

Effects of Pressure on the Structure of CoFe2O4/SiO2 Nanocomposites

LI Ji¹,
WANG Li¹,
JIA Xiao-Peng²,
LI Hai-Bo^{1
, ,}

1.
Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Siping 136000, China;
2.
National Laboratory of Superhard Materials, Jilin University, Changchun 130012, China

摘要

摘要: 采用溶胶-凝胶工艺和高温高压实验技术，制备了纳米CoFe2O4/SiO2复合材料。利用X射线衍射仪、扫描电子显微镜和振动样品磁强计，对样品的结构、微观形貌和磁性进行了研究，并对CoFe2O4中阳离子的占位情况进行了讨论。结果表明，随着处理压力的升高，样品的晶粒尺寸增大，晶格常数减小，比饱和磁化强度增大。通过计算结果可以推断，压力的升高导致CoFe2O4中的部分Fe3+从A位移向了B位，而部分Co2+则从B位移向了A位。
- CoFe2O4/SiO2 /
- 溶胶-凝胶 /
- 高温高压 /
- 阳离子占位
Abstract: Combined with sol-gel technology and high-pressure and high-temperature technique, CoFe2O4/SiO2 nanocomposites are fabricated. The structure and magnetic property of the nanocomposites are monitored by X-ray diffraction (XRD), scanning electron microscope (SEM) and vibrating sample magnetometer (VSM). The results show that the lattice constant of CoFe2O4 decreases but the grain size increases with increasing treatment pressure in the experiment. Moreover, the specific saturation magnetization increases gradually with increasing treatment pressure. According to the calculation results, it can be concluded that the increasing pressure leads to the Fe3+ ions transfer from A sites to B sites and the Co2+ ions transfer from B sites to A sites.
- CoFe2O4/SiO2 /
- sol-gel /
- high pressure and high temperature /
- cation occupation

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参考文献(16)

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