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Preparation and characterization of yttrium iron garnet (YIG) nanocrystalline powders by auto-combustion of nitrate-citrate gel

Hosseini Vajargah, S ; Sharif University of Technology | 2007

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jallcom.2006.05.023
  3. Publisher: 2007
  4. Abstract:
  5. The nitrate-citrate gel exhibits auto-catalytic behavior, which can be used to synthesize nanocrystalline YIG powders. In this study, yttrium iron garnet (Y3Fe5O12) nanocrystalline powders were prepared by a sol-gel auto-combustion process. The influence of metal nitrates to citric acid molar ratio (MN/CA) of the precursor solution on the combustion behavior and crystallite size of synthesized powders was investigated by scanning electron microscopy (SEM), thermal analyses (DTA/TGA) and X-ray diffraction (XRD). The results show that with increasing MN/CA value, the combustion rate increases and the single-phase YIG forms at a higher temperature. The crystallite size of the single phase YIG prepared with different MN/CA values and calcined at 800 °C for 3 h are in the range of 38-70 nm. In addition, the crystallite size of the powders increased with increasing the calcination temperature. © 2006 Elsevier B.V. All rights reserved
  6. Keywords:
  7. Catalysis ; Combustion ; Differential thermal analysis ; Gels ; Nanostructured materials ; Nitrates ; Scanning electron microscopy ; Auto-combustion ; Molar ratio ; Nanocrystalline powders ; Yttrium iron garnet (YIG) ; Garnets
  8. Source: Journal of Alloys and Compounds ; Volume 430, Issue 1-2 , 2007 , Pages 339-343 ; 09258388 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S0925838806005342