Stabilization of the high coercivity epsilon-Fe2O3 phase in the CeO2-Fe2O3/SiO2 nanocomposites

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F12%3A10127296" target="_blank" >RIV/00216208:11310/12:10127296 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jssc.2012.03.022" target="_blank" >http://dx.doi.org/10.1016/j.jssc.2012.03.022</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jssc.2012.03.022" target="_blank" >10.1016/j.jssc.2012.03.022</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Stabilization of the high coercivity epsilon-Fe2O3 phase in the CeO2-Fe2O3/SiO2 nanocomposites

Popis výsledku v původním jazyce

We have investigated the processes leading to the formation of the Fe2O3 and CeO2 nanoparticles in the SiO2 matrix in order to stabilize the epsilon-Fe2O3 as the major phase. The samples with two different concentrations of the Fe were prepared by sol-gel method, subsequently annealed at different temperatures up to 1100 degrees C, and characterized by the Mossbauer spectroscopy, Transmission Electron Microscopy (TEM), Powder X-ray Diffraction (PXRD), Energy Dispersive X-ray analysis (EDX) and magneticmeasurements. The evolution of the different Fe2O3 phases under various conditions of preparation was investigated, starting with the preferential appearance of the gamma-Fe2O3 phase for the sample with low Fe concentration and low annealing temperatureand stabilization of the major epsilon-Fe2O3 phase for high Fe concentration and high annealing temperature, coexisting with the most stable alpha-Fe2O3 a phase. A continuous increase of the particle size of the CeO2 nanocrystals with inc

Název v anglickém jazyce

Stabilization of the high coercivity epsilon-Fe2O3 phase in the CeO2-Fe2O3/SiO2 nanocomposites

Popis výsledku anglicky

We have investigated the processes leading to the formation of the Fe2O3 and CeO2 nanoparticles in the SiO2 matrix in order to stabilize the epsilon-Fe2O3 as the major phase. The samples with two different concentrations of the Fe were prepared by sol-gel method, subsequently annealed at different temperatures up to 1100 degrees C, and characterized by the Mossbauer spectroscopy, Transmission Electron Microscopy (TEM), Powder X-ray Diffraction (PXRD), Energy Dispersive X-ray analysis (EDX) and magneticmeasurements. The evolution of the different Fe2O3 phases under various conditions of preparation was investigated, starting with the preferential appearance of the gamma-Fe2O3 phase for the sample with low Fe concentration and low annealing temperatureand stabilization of the major epsilon-Fe2O3 phase for high Fe concentration and high annealing temperature, coexisting with the most stable alpha-Fe2O3 a phase. A continuous increase of the particle size of the CeO2 nanocrystals with inc

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

<a href="/cs/project/GAP108%2F10%2F1250" target="_blank" >GAP108/10/1250: Multifunkční nanočástice: pokročilé metody přípravy a studium jejich fyzikálních vlastností</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Solid State Chemistry

ISSN

0022-4596

e-ISSN

—

Svazek periodika

191

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

136-141

Kód UT WoS článku

000305670700020

EID výsledku v databázi Scopus

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