Paper Title:
Preparation of Rare-Earth Permanent Magnetic Strontium Ferrite by Microwave Sintering Process
  Abstract

In this paper, the green body was prepared by pre-roasted material of strontium ferrite, adding 0.2 to 9% the rare earth additive, by wet milling and forming into pellets Φ30×10 mm under magnetic field. Then, the green body was sintered separately by microwave sintering (MS) method and conventional sintering (CS) technique. The results showed that: the strontium ferrite samples with the same magnetic properties Br and (BH) max were 420 ± 10mT and 33.0 ± 2 kJ/m 3) were synthesized by microwave sintering (MS) method against conventional sintering method, the sintering temperature and time were reduced 150~300°C and 5~6h. Therefore, microwave sintering method will significantly decrease energy consumption. Further analysis revealed that the major improvements in microwave sintering were the material microstructure, the grain size was significantly reduced, the magnetic domain short-range order was increased so that the degree of orientation was increased, and although the fusion was existed between grains, the grain boundaries did not disappear.

  Info
Periodical
Edited by
Yiwang Bao, Li Tian and Jianghong Gong
Pages
264-268
DOI
10.4028/www.scientific.net/AMR.177.264
Citation
H. H. Jiang, M. L. Jin, Z. Y. Wang, Q. Z. Chen, H. C. Qian, "Preparation of Rare-Earth Permanent Magnetic Strontium Ferrite by Microwave Sintering Process", Advanced Materials Research, Vol. 177, pp. 264-268, 2011
Online since
December 2010
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