Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 28: Issue 1
Thermal synthesis of Barium and barium-strontium metaniobates by using a coprecipitation method
Authors:
L. Marta Polytechnic Institute Cluj-Napoca Cluj-Napoca

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M. Zaharescu Centre of Physical Chemistry Bucharest Bucharest

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Iov Haiduc Babeş-Bolyai University Chemistry Department Cluj-Napoca Romania Cluj-Napoca Romania

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C. Macarovici Babeş-Bolyai University Chemistry Department Cluj-Napoca Romania Cluj-Napoca Romania

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Pages:
175–188
Online Publication Date:
17 Feb 2006
Publication Date:
17 Sep 1983
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf02105289
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The paper presents a new, non-traditional method for the synthesis of barium metaniobate, BaNb2O6, and of a mixed barium-strontium metaniobate, Ba0.29Sr0.71Nb2O6, through the thermal decomposition of coprecipitation products. The conditions of quantitative precipitation of the metals as niobic acid and barium or barium-strontium oxalate were established. The mechanism of thermal decomposition of the coprecipitate was deduced from differential thermal analysis and X-ray diffraction date. Barium metaniobate forms at 470°C, below the temperature required in the synthesis based upon the solid-state reaction between Nb2O5 and BaCO3 (1100°C). The mixed barium-strontium compound is formed at 700°C, below the 1100°C used in the reaction between Nb2O5, BaCO3 and SrCO3.

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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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