Simple and fast preparation of pure maghemite nanopowders through sol-gel self-combustion

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F11%3A10108461" target="_blank" >RIV/00216208:11310/11:10108461 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1007/s10971-011-2559-8" target="_blank" >http://dx.doi.org/10.1007/s10971-011-2559-8</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10971-011-2559-8" target="_blank" >10.1007/s10971-011-2559-8</a>

Result language
angličtina
Original language name
Simple and fast preparation of pure maghemite nanopowders through sol-gel self-combustion
Original language description
Pure maghemite nanopowders made up of nanocrystals with average size of 19 nm was prepared by a simple sol-gel self combustion process. The gel pH and the primer temperature turned out the key parameters for the obtaining of the maghemite phase, that often is accompanied by the most thermodynamically stable hematite. Pure maghemite was achieved only with a gel pH value of 7 and with a primer temperature between 290 and 325 A degrees C. XRD and IR pointed out the formation of maghemite with tetragonal structure and HRTEM indicated the high degree of crystallinity of the powder. Mossbauer measurements allowed to confirm the presence of maghemite phase with Fe(octa):Fe(tetra) ratio of 1.62 which is very close to the theoretical value and the presence spincanting strongly dependent on applied magnetic field. This picture is confirmed by dc magnetic measurements.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CA - Inorganic chemistry
OECD FORD branch
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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