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Synthesis of Hexagonal Ferrites by Citric Complex Method

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Abstract:

Various hexagonal ferrites, which include hard and soft ferrites, were prepared by citric complex method. High purity reagent of strontium carbonate, iron (III) nitrate ennnahydrate, cobalt (II) nitrate hexahydrate and lanthanum oxide were used as starting materials. Prepared aqueous solution was heated for dehydration and gelling. Thermal pyrolysis was carried out by heating the gel. The obtained precursor powders were ground with an alumina mortar and compacted by uniaxial pressing into disk specimens and then heated at temperature range between 1023K and 1523K in air. Phase identification and determination of lattice parameters were carried out by powder X-ray diffraction. Scanning Electron Microscope was utilized to investigate the microstructure of the polycrystalline ferrites. Magnetic properties were discussed by magnetization measurements by using a vibration sample magnetometer. Magnetization and coercive force were measured. In the case of M-type ferrite, M-type barium and strontium ferrites were formed at vary low temperature relative to by conventional synthesis. The lanthanum and cobalt substituted M-type strontium ferrite ultra fine powders prepared by citric complex method showed extremely large coercive force.

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Periodical:

Advances in Science and Technology (Volume 45)

Pages:

697-700

DOI:

https://doi.org/10.4028/www.scientific.net/AST.45.697

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Online since:

October 2006

Authors:

Takeyuki Kikuchi, Tatsuya Nakamura, Masamichi Miki, Makoto Nakanishi, Tatsuo Fujii, Jun Takada, Yasunori Ikeda

Keywords:

Citric Complex Method, Hexagonal Ferrite

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] S. E. Jacobo, C. Domingo-Pascual, R. Rodriguez-Clemente, M. A. Blesa, J. Mater. Sci., 32, 1025-1028 (1997).

DOI: 10.1023/a:1018582423406

Google Scholar

[2] Z. Zheng, B. Guo, X. Mei, J. Magn. Magn. Mater., 78, 73-76 (1989).

Google Scholar

[3] B. T. Shirk and W. R. Buessem, J. Am. Ceram. Soc., 53, 192-196 (1970).

Google Scholar

[4] O. Kubo, T. Ido, H. Yokoyama, IEEE Trans. Magn., 18, 1122-1124 (1982).

Google Scholar

[5] Z. X. Tang, S. Nafis, C. M. Sorensen, and M. Hadjipanayis, IEEE Trans. Magn., 25, 4236-4238 (1989).

DOI: 10.1109/20.42580

Google Scholar

[6] M. V. Cabanas, J .M. Gonzalez-Calbet, and M. Vallet-regi, J. Mater. Res., 9, 712-716 (1994).

Google Scholar

[7] W. A. Kaczmarek, B. W. Ninham, and A. Calka, J. Appl. Phys., 70, 5909-5911 (1991).

Google Scholar

[8] W. Zhong, W. Ding, Y. Jiang, N. Zhang, J. Zhang, Y. Du, and Q. Yan, J. Am. Ceram. Soc., 80, 3258-3262 (1997).

Google Scholar

[9] H. F. Yu, K. C. Huang, J. Magn. Magn. Mater., 260, 455-461 (2003).

Google Scholar

[10] J. Huang, H. Zhuang, and W. Li, J. Magn. Magn. Mater., 256, 390-395 (2003).

Google Scholar

[11] M. Pechini, U.S. Patent No. 3 330 697, July 11, (1967).

Google Scholar

[12] T. Kikuchi, T. Nakamura, M. Nakanishi, T. Fujii, J. Takada, Y. Ikeda, M. Nakamura, M. Miki, Trans. Mater. Res. Soc. Japan, 29.

Google Scholar

[5] 2305-2308 (2004).

Google Scholar

[13] K. Iida, Y. Minachi, K. Masuzawa, M. Kawakami, H. Nishio, and H. Taguchi, J. Magn. Soc. Japan, 23, 1093-1096 (1999).

DOI: 10.3379/jmsjmag.23.1093

Google Scholar

[14] Y. Ogata, Y. Kubota, T. Takemi, IEEE Trans. Mag., 35, 3334-3336 (1999).

Google Scholar

[15] R. Grössinger, J. C. Téllez blanco, F. Kools, A. Morel, M. Rossignol, Ph. Tenaud, Proc. 8th International Conference on Ferrites, 428-430 (2000).

Google Scholar