全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

压力对纳米CoFe2O4/SiO2复合材料结构的影响

DOI: 10.11858/gywlxb.2013.01.003, PP. 29-33

Keywords: CoFe2O4/SiO2,溶胶-凝胶,高温高压,阳离子占位

Full-Text   Cite this paper   Add to My Lib

Abstract:

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。

References

[1]  Ata-Allah S S, Kaiser M. Cation distribution, hyperfine parameters and conduction mechanism in the ferrimagnetic system Cu0. 5Co0. 5GaxFe2-xO4 [J]. Phys Status Solidi B, 2005, 242(6): 1324-1335.
[2]  Wang Y C, Ding J, Yin J H, et al. Effects of heat treatment and magnetoannealing on nanocrystalline Co-ferrite powders [J]. J Appl Phys, 2005, 98(12): 124306.
[3]  Singhal S, Singh J, Barthwal S K, et al. Preparation and characterization of nanosize nickel-substituted cobalt ferrites (Co1-xNixFe2O4) [J]. J Solid State Chem, 2005, 178(10): 3183-3189.
[4]  Wang L, Wang H B, Wang T, et al. Structure, magnetic properties and atomic immigration of CoFe2O4 nanoparticles [J]. Acta Physica Sinica, 2006, 55(12): 6515-6521. (in Chinese)
[5]  王丽, 王海波, 王涛, 等. CoFe2O4纳米颗粒的结构、磁性以及离子迁移 [J]. 物理学报, 2006, 55(12): 6515-6521.
[6]  Hua J, Liu M, Feng M, et al. Magnetic properties of Co1-xNixFe2O4/SiO2 nanocomposites [J]. Acta Metallurgica Sinica, 2009, 45(4): 119-124. (in Chinese)
[7]  华杰, 刘梅, 冯明, 等. Co1-xNixFe2O4/SiO2纳米复合材料的磁性 [J]. 金属学报, 2009, 45(4): 119-124.
[8]  Chen D H, He X R. Synthesis of nickel ferrite nanoparticles by sol-gel method [J]. Mater Res Bull, 2001, 36(7/8): 1369-1377.
[9]  He X H, Zhang Q Q, Ling Z Y. Kinetics and magnetic properties of sol-gel derived NiZn ferrite-SiO2 composites [J]. Mater Lett, 2003, 57: 3031-3036.
[10]  Li H B, Chen J Y, Liu M, et al. Preparation and magnetic properties of CoFe2O4/SiO2 nano-composites [J]. Journal of Jilin University (Science Edition), 2007, 45(3): 455-457. (in Chinese)
[11]  李海波, 陈敬艳, 刘梅, 等. CoFe2O4/SiO2纳米复合材料的制备及其磁性 [J]. 吉林大学学报(理学版), 2007, 45(3): 455-457.
[12]  Sun Z Y, Wang S, Deng Y D, et al. Effects of high pressure treatment on structures and luminescence properties of nano ZnO and composite ZnO/SnO2 materials [J]. Chinese Journal of High Pressure Physics, 2009, 23(4): 299-304. (in Chinese)
[13]  孙振亚, 王烁, 邓允棣, 等. 高压对纳米ZnO和ZnO/SnO2复合材料的结构和发光性能的影响 [J]. 高压物理学报, 2009, 23(4): 299-304.
[14]  Xiao W S, Li Y C, Liu J, et al. Transformations of amorphous silica under high pressure and high temperature [J]. High Energy Physics and Nuclear Physics, 2005, 29(Supplement): 116-119. (in Chinese)
[15]  肖万生, 李延春, 刘景, 等. 非晶态SiO2的高温高压转变研究 [J]. 高能物理与核物理, 2005, 29(增): 116-119.
[16]  Ravinder D. Composition dependence of the elastic moduli of mixed lithium-cadmium ferrites [J]. J Appl Phys, 1994, 75(10): 6121-6123.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133