Please use this identifier to cite or link to this item: doi:10.22028/D291-24405
Title: Structural study of the formation of lead zirconate titanate via sol-gel process
Author(s): Ahlfänger, R.
Bertagnolli, H.
Ertel, T.
Friedrich, B.
Helmerich, Alfred
Kolb, U.
Nass, Rüdiger
Schmidt, Helmut K.
Peter, D.
Language: English
Year of Publication: 1991
OPUS Source: Eurogel '91 : progress in research and development of processes and products from sols and gels / edited by S. Vilminot ... - Amsterdam [u.a.] : North-Holland, 1992. — (European Materials Research Society monographs ; 5), S. 275-282
SWD key words: Ausgangsmaterial
DDC notations: 620 Engineering and machine engineering
Publikation type: Conference Paper
Abstract: The structures of the precursors Zr(OPrn)4 and Ti(OPrn)4 in solution were investigated by means of NMR and IR spectroscopy and, in the case of Zr(OPrn)4, by means of EXAFS spectroscopy. The results were confirmed by gel permeation chromatography, which reveals dimers on average. Following chemical modification of the precursors with acetic acid, their degree of association was unaltered. Hydrolysis and condensation reactions were controlled by esterification of propanol with acetic acid and accompanied by the growth of oligomers, presumably by the Ostwald ripening mechanism. The reaction of the chemically modified precursors with Pb(OAc)2 results, after calcining, in the formation of lead zirconate titanate (PZT). Addition of water to the sol immediately or after three weeks, led to different products. Large angle X-ray diffraction showed that ageing of the sol favours the formation of lead zirconate titanate and results in higher crystallinity.
Link to this record: urn:nbn:de:bsz:291-scidok-27122
ISBN: 0-444-89344-X
Date of registration: 18-Feb-2010
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
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