Journal
CERAMICS INTERNATIONAL
Volume 38, Issue 1, Pages 373-379Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2011.07.016
Keywords
Powders: chemical preparations; Ferrites; Spinel; Magnetic properties
Categories
Funding
- Russian Foundation for Basic Research [08-02-99062_r_ofi]
- Presidium of RAS [21]
- Ural Branch of RAS [09-S-2-1016]
- Siberian Branch of RAS [09-S-2-1016]
- Department of physical sciences of RAS
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Peculiarities of synthesis of nanocrystalline NiFe2O4 powders by thermal decomposition of citrate precursors were investigated. It was found that the parameters of nanopowders are determined by the decomposition temperature and pH of the precursor media. The temperature and duration of the process of precursor decomposition are limiting factors for decrease of the grain size. An optimum relation between the limiting factors can be determined experimentally by variation of pH. Correlation between the synthesis parameters, particle size, and magnetic properties is discussed. It is shown that optimum magnetic and magnetostrictive properties were found for the bulk polycrystalline samples sintered using the powders obtained for pH 2. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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