Adv. Search
Journal of Inorganic Materials

Journal of Inorganic Materials >

2009 , Vol. 24 >Issue 6: 1193 - 1196

DOI: https://doi.org/10.3724/SP.J.1077.2009.01193

Research Paper

One-step Synthesis of Barium Hexaferrite Nanocrystals via Microwaveassisted Sol-Gel auto-Combustion and their Magnetic Properties

  • LIU Jun-Liang ,
  • GUO Cui-Jing ,
  • ZHANG Wei ,
  • JI Rong-Jin ,
  • ZENG Yan-Wei
Expand
  • (School of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China)

Received date: 2009-02-17

  Revised date: 2009-04-29

  Online published: 2010-04-22

Fold

Abstract

Single phase barium hexaferrite nanocrystals were innovatively onestep synthesized via a microwave-assisted sol-gel auto-combustion method using citric acid and ethylene diamine tetraacetic acid as composite chelating agents, and freeze-drying technique was used to remove sols’ moisture that effectively improve the spatial distribution homogeneity of metal ions and oxidant in the gels. The obtained barium hexaferrite nanocrystals is characterized by fluffy particle aggregates with the diameter ranging from 50nm to 100nm. The nanocrystals contain single magnetic domains with a low coercive field of 20.7kA/m and a high saturation magnetization of 338.5kA/m. The analysis shows that keeping rich oxidant in the autocombustion process can prohibit the reduction of iron ions by the organic fragment from the decomposition of fuels and promote the phase formation of barium hexaferrite.

Key words： barium hexaferrite; microwaveassistance; sol-gel auto-combustion; onestep synthesis

Cite this article

LIU Jun-Liang , GUO Cui-Jing , ZHANG Wei , JI Rong-Jin , ZENG Yan-Wei . One-step Synthesis of Barium Hexaferrite Nanocrystals via Microwaveassisted Sol-Gel auto-Combustion and their Magnetic Properties[J]. Journal of Inorganic Materials, 2009 , 24(6) : 1193 -1196 . DOI: 10.3724/SP.J.1077.2009.01193

References

［1］Went J L, Ratenau G W, Gorter E W, et al. Philips Tech. Rev., 1952, 13:194-208.
［2］Sugimoto S, Kpndo S, Okayama K, et al. IEEE Trans. on Magn., 1999, 35(5):3154-3156.
［3］Sui X Y, Scherge M, Kryder M H, et al. J. Magn. Magn. Mater., 1996,155(1/2/3): 132-139.
［4］Harris V G, Chen Z H, Chen Y J, et al. J. Appl. Phys., 2006, 99: 08M911-1-5.
［5］Chen Y J, Anton L G, Chen T Y, et al. J. Appl. Phys., 2007, 101: 09M501-1-3.
［6］Chen W F, Li F S, Yu J Y, et al. Mater. Res. Bull., 2006, 41(12):2318-2324.
［7］Tian C G, Liu J L, Cai J, et al. J. Alloy. Compd., 2008, 458(1/2):378-382.
［8］Tian C G, Liu J L, Guo C J, et al. J. Alloy. Compd., 2008, 460(1/2):646-650.
［9］Huang J G, Zhang H R, Li W L. Mater. Res. Bull., 2003, 38(1):149-159.
［10］Mali A, Ataie A.Ceram. Int., 2004, 30(7):1979-1983.
［11］Mali A, Ataie A. J. Alloy. Compd., 2005, 399(1/2):245-250.
［12］Mali A, Ataie A. Scripta Mater., 2005, 53(9):1065-1070.
［13］Mali A, Ataie A. J. Electroceram., 2008,21(1-4):357-360.
［14］Xu G Q, Ma H L, Zhong M J, et al. J. Magn. Magn. Mater., 2006, 301(2): 383-388.
［15］Rakshit S K, Parida S C, Ziley S, et al. J. Solid State Chem., 2004, 177(4/5):1146-1156.
Options
Outlines

/

〈 〉