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Densification of the PLZT Films Derived from Polymer‐Modified Solution by Tailoring Annealing Conditions
Author(s) -
Du Z. H.,
Ma J.,
Zhang T. S.
Publication year - 2007
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2007.01499.x
Subject(s) - polyvinylpyrrolidone , materials science , isothermal process , annealing (glass) , fourier transform infrared spectroscopy , atmospheric temperature range , chemical engineering , polymer , analytical chemistry (journal) , composite material , mineralogy , polymer chemistry , thermodynamics , organic chemistry , chemistry , physics , engineering
The Pb 0.91 La 0.09 (Zr 0.65 ,Ti 0.35 ) 0.9775 O 3 films were prepared from the solution containing polyvinylpyrrolidone, with M w of 360 000. A fast heating rate of 40°C/min was used to heat our samples to temperatures in the range of 550°–750°C for different durations. Both a rapid heating rate and isothermal holding at a proper temperature are found to be essential for obtaining dense and crack‐free PLZT films. The TG‐DTA and Fourier‐transform infrared results indicated that the fast heating rate could keep a certain amount of polyvinylpyrrolidone residues undecomposed to a higher temperature (<700°C), which was found to be beneficial for the densification of the films during subsequent isothermal hold. The possible mechanisms responsible for the enhanced densification have been discussed. In addition, the effects of annealing temperature on the electrical and optical properties were also investigated.