Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 42: Issue 4
Effects of metal salts on the thermal decomposition of edta-gel precursors for ferroelectric ceramic powders
Authors:
Hong-Wen Wang University of Manchester/UMIST Materials Science Centre Grosvenor Street M1 7HS Manchester UK

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D. Hall University of Manchester/UMIST Materials Science Centre Grosvenor Street M1 7HS Manchester UK

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, and
F. Sale University of Manchester/UMIST Materials Science Centre Grosvenor Street M1 7HS Manchester UK

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Pages:
823–838
Online Publication Date:
09 Jan 2007
Publication Date:
01 Oct 1994
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf02546753
Keywords:
EDTA-gel precursors; ferroelectric ceramic powders
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Abstract  

Raw chemicals such as metal nitrates and chlorides were found to affect the thermal decomposition behaviour of EDTA-gel precursors used for the production of ceramic powders. Fine, homogeneous ceramic powders were produced from nitrate solutions while chlorides gave segregated phases. In studies on the production of lead zirconate titanate (PZT) using chlorides, the segregation and loss of lead was observed and shown to be caused by the formation and evaporation of PbCl2. Thermal analysis (DTA/TG) quantitatively proved the suggested reaction mechanism for this phase segregation. Crystallization of the desired perovskite phase of lead zirconate titanate (PZT) and barium titanate (BT) initiated at temperatures as low as 250°C in the nitrate-EDTA precursors. Water of crystallization and formation of BaCO3 in the barium titanate precursor were suggested to account for differences in the observed decompositional behaviours of the BT and PZT precursors.

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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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