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The effects of Misch-Metal oxide addition on magnetic properties and crystal structure of Sr1-xMMxFe12O19 ferrite

Madaah Hosseini, H. R ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jallcom.2006.10.018
  3. Publisher: 2008
  4. Abstract:
  5. The effects of Misch-Metal (MM) oxide addition on magnetic properties, crystal structure and microstructure of the M-type strontium ferrite have been studied. By MM substitution of Sr a significant increase in intrinsic coercivity and a slight decrease in remanence was observed. The highest value of energy product was obtained at 4 wt.% MM addition. By calculating the lattice constants of 4 and 8 wt.% MM added specimens, it was found that the length of c-axis decreases by 4 wt.% MM addition and then undergoes a considerable increase at 8 wt.%, while the a-axis increases monotonously. The SEM observations revealed that the migration of MM oxides to the grain boundaries could be the major microstructural contributor for increasing iHc. © 2006 Elsevier B.V. All rights reserved
  6. Keywords:
  7. Crystal structure ; Grain boundaries ; Iron compounds ; Microstructure ; Oxidation ; Strontium ; Energy product ; Hard magnetic materials ; Strontium ferrite ; Ferrites
  8. Source: Journal of Alloys and Compounds ; Volume 448, Issue 1-2 , 2008 , Pages 284-286 ; 09258388 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0925838806016070