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Molecular Crystals and Liquid Crystals Volume 555, 2012 - Issue 1: Proceedings of the 11th International Conference on Frontiers of Polymers and Advanced Materials (ICFPAM 2011)
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Original Articles

The Effect of Chromium and Aluminium Ion Substitution on Phase Analysis, Microstructure and Magnetic Properties of Sr-Hexaferrite Ceramics and Nanopowders Synthesized by the Auto Combustion Route

Mehrdad Shaygan Department of Material Science and Engineering, Najafabad branch, Islamic Azad University, Najafabad, Isfahan, Iran
,
Amir Abbas Nourbakhsh Department of Ceramic Engineering, Shahreza branch, Islamic Azad University, Shahreza, Isfahan, Iran
,
Morteza Mozafari Physics Department, Razi University, TaghBostan, Kermanshah, Iran
,
Mohsen Shahshahan Department of Ceramic Engineering, Shahreza branch, Islamic Azad University, Shahreza, Isfahan, Iran
&
Mohsen Nourbakhsh R&D Department, Taban Magnetic material development Co., Isfahan, Iran
Pages 94-103 | Received 15 Jul 2011, Accepted 15 Sep 2011, Published online: 14 Feb 2012
 
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Abstract

The chromium and aluminium quantitiesrequired to synthesize nano-sized SrCrx Fe12-xO19 and SrAlxFe12-xO19 by the auto combustion route were optimized. XRD analysis showed that the optimum amounts were differed in two cases. A combination of 0.75 wt% of nano-sized SrFe12O19 and 0.75 wt% of the commercial additive, in chromium doped sample from solid state process(Cr2O3 addition), resulted in superior magnetic properties with increased intrinsic coercivity, remanence magnetization and rectangularity ratio.

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