Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 64: Issue 3
Phase Formation Study of The Substituted Lanthanum Manganites Solid Solutions
Authors:
A. Ianculescu Institute of Physical Chemistry 202 Spl. Independentei 77208 Bucharest Romania 202 Spl. Independentei 77208 Bucharest Romania

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A. Braileanu Institute of Physical Chemistry 202 Spl. Independentei 77208 Bucharest Romania 202 Spl. Independentei 77208 Bucharest Romania

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M. Zaharescu Institute of Physical Chemistry 202 Spl. Independentei 77208 Bucharest Romania 202 Spl. Independentei 77208 Bucharest Romania

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I. Pasuk SC ICPE SA. 313 Spl. Unirii 74204 Bucharest Romania 313 Spl. Unirii 74204 Bucharest Romania

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E. Chirtop SC MATPUR SA. 41-45 Drumul intre tarlale 73611 Bucharest Romania 41-45 Drumul intre tarlale 73611 Bucharest Romania

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C. Popescu LACECA Research Centre 95 Siret 78308 Bucharest Romania 95 Siret 78308 Bucharest Romania

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E. Segal University of Bucharest Faculty of Chemistry, Department of Physical Chemistry 13 Blv. Republicii Bucharest Romania 13 Blv. Republicii Bucharest Romania

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Pages:
1001–1010
Online Publication Date:
02 Nov 2004
Publication Date:
01 Jun 2001
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1011539400575
Keywords:
manganite; perovskite; solid solution; thermal analysis; XRD
Restricted access

Abstract  

It is well known that the manganites-based solid solutions are interesting for their electric and magnetic properties. LaMnO3 exhibits a distorted perovskite structure due to Mn3+ ion, which determines the presence of the Jahn–Teller effect. Replacing La3+ host ions by cations of lower valence leads to the disappearance of this effect and changes the characteristics of these materials. Although the formation of manganites-based solid solutions has been intensively studied, there are some unelucidated aspects concerning their formation mechanism, depending both on the precursors used and on the thermal treatment applied in order to obtain suitable properties. In this work the formation mechanism of La0.7M0.3MnO3 (M=Ca, Sr, Ca+Sr in equimolecular mixture) solid solutions, in isothermal and non-isothermal conditions, was studied. For this purpose XRD, DTA/TG and spectral techniques were used. The solid solutions formation was found to be more dependent on the Mn-precursors type than the thermal treatment conditions.

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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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