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Titel: Structural study of the formation of lead zirconate titanate via sol-gel process
Verfasser: Ahlfänger, R.
Bertagnolli, H.
Ertel, T.
Friedrich, B.
Helmerich, Alfred
Kolb, U.
Nass, Rüdiger
Schmidt, Helmut K.
Peter, D.
Sprache: Englisch
Erscheinungsjahr: 1991
Quelle: 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-Schlagwörter: Ausgangsmaterial
NMR-Spektroskopie
EXAFS
Gelchromatographie
Essigsäure
Hydrolyse
Kondensation
Ostwald-Verfahren
Zirkonate
DDC-Sachgruppe: 620 Ingenieurwissenschaften und Maschinenbau
Dokumentart : InProceedings (Aufsatz / Paper einer Konferenz etc.)
Kurzfassung: 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 zu diesem Datensatz: urn:nbn:de:bsz:291-scidok-27122
hdl:20.500.11880/24461
http://dx.doi.org/10.22028/D291-24405
ISBN der Druckausgabe: 0-444-89344-X
SciDok-Publikation: 18-Feb-2010
Fakultät: Sonstige Einrichtungen
Fachrichtung: SE - INM Leibniz-Institut für Neue Materialien
Fakultät / Institution:INM
SE - Sonstige Einrichtungen

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