Preparation of ZnFe2O4/SiO2 and CdFe2O4/SiO2 nanocomposites by sol-gel method.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F03%3A50033011" target="_blank" >RIV/61388980:_____/03:50033011 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/03:5624

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Preparation of ZnFe2O4/SiO2 and CdFe2O4/SiO2 nanocomposites by sol-gel method.

Original language description

The purpose of this paper is to characterise the phase relations in the system ZnFe2O4/SiO2 and CdFe2O4/SiO2 by dependence on the thermal treatment. Both ferrites have the structure of normal spinels. The samples were prepared by the sol-gel method, heated at a temperature of 800-1100 degreesC and characterised by high-resolution transmission electron microscopy (HRTEM), X-ray diffraction, and Mossbauer spectroscopy. HRTEM revealed nanocrystals of the size of about 5-10 nm, depending on the heat treatment temperature. The spinel structure of ZnFe2O4 in the amorphous silica matrix proved to be very stable up to 1100 degreesC without decomposition to the zinc silicate and iron (111) oxide. On the other hand, CdFe2O4 already starts to decompose at 900 degreesC and complete decomposition to the alpha-Fe2O3 and cadmium silicate can be observed at 1100 degreesC. This decomposition is also accompanied with the recrystallisation of the silica matrix to quartz and cristobalite.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CA - Inorganic chemistry

OECD FORD branch

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Project

<a href="/en/project/LN00A028" target="_blank" >LN00A028: New inorganic compounds and advanced materials</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2003

Confidentiality

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

Name of the periodical

Journal of Non-Crystalline Solids

ISSN

0022-3093

e-ISSN

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Volume of the periodical

315

Issue of the periodical within the volume

1-2

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

7

Pages from-to

70-76

UT code for WoS article

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EID of the result in the Scopus database

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