Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 69: Issue 3
Structural, magnetic and thermal characterizations of Fe2O3 nanoparticle systems
Authors:
Y. Ichiyanagi Yokohama National University Department of Physics Hodogaya, Yokohama 240-8501 Japan Hodogaya, Yokohama 240-8501 Japan

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Y. Kimishima Yokohama National University Department of Physics Hodogaya, Yokohama 240-8501 Japan Hodogaya, Yokohama 240-8501 Japan

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Pages:
919–923
Online Publication Date:
02 Nov 2004
Publication Date:
01 Jul 2002
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1020672409713
Keywords:
DTA-TG; iron oxide; nanoparticle; magnetization
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Abstract  

X-ray, magnetic and differential thermal analysis and thermogravimetric (DTA-TG) measurements of Fe2O3 nanoparticles surrounded by amorphous SiO2were carried out. The mass loss above 370 K could be attributed to the dehydration. The broadened exothermic peak around 900 K was observed by the DTA analysis. Considering the results of the X-ray and magnetic analyses, this anomaly was interpreted as due to the g- to a-transition in the present Fe2O3nanoparticle system. The broadness of the peak and thus the gradual progress of the transformation would be attributed to the stress caused by the amorphous SiO2 network surrounding extremely small particles.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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