Preparation and Magnetic Properties of Y-Type Ferroxplana by Sol-Gel Method

Abstract:

Article Preview

The preparation and magnetic properties of Y-type ferroxplana were investigated. Y-type ferroxplana of composition Ba2Zn1.2-xCoxCu0.8Fe12O22 was prepared by citrate sol-gel autocombustion process. X varied from 0 to 1.2. Phase formation was characterized by powder X-ray diffraction (XRD). The microstructure was observed via scanning electron microscopy (SEM). The frequency spectra of initial permeability were measured via an impedance analyzer. Results reveal that a well-defined Y-type phase can be formed after the auto-combusted powders were annealed at 900oC. The synthesized nano-sized powder is very active and can be sintered well at 900oC. The sintered samples have fine-grained microstructure. The samples exhibit excellent magnetic properties in hyper-frequency. As zinc content increases, the initial permeability is enhanced and the cut-off frequency decreases.

Info:

Periodical:

Key Engineering Materials (Volumes 280-283)

Edited by:

Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li

Pages:

477-480

Citation:

Y. Bai et al., "Preparation and Magnetic Properties of Y-Type Ferroxplana by Sol-Gel Method", Key Engineering Materials, Vols. 280-283, pp. 477-480, 2005

Online since:

February 2007

Export:

Price:

$38.00

[1] J.Y. Hsu: IEEE Trans. on Magentics. Vol. 30 (1994) p.4096.

[2] J. Smit and H.B.J. Wijn: Ferrites (Cleaver-HumePress, London, 1959).

[3] Y. Bai, J, Zhou, Z. Gui and L. Li: J. Magn. Magn. Mater. Vol. 246 (2002), p.140.

[4] A. Nakono: Ferrites. Proc. of ICF-6, p.1225.

[5] H. Zhang, Z. Ma, J. Zhou, Z. Yue and Z. Gui: J. Magn. Magn. Mater. Vol. 213 (2000), p.304.