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Title: Structure of nanocrystalline powder and thin films of lead lanthanum titanate prepared by the sol-gel process
Authors: Zhou, Qifa
Chan, Helen L. W.
Zhang, Qingqi
Choy, Chung-loong
Subjects: Annealing
Crystal microstructure
Differential thermal analysis
Ferroelectric materials
Nanostructured materials
Scanning electron microscopy
Temperature control
Thermal effects
Thermogravimetric analysis
Thin films
X-ray diffraction
Issue Date: 1996
Publisher: IEEE
Source: ISE 9 : 9th International Symposium on Electrets : Shanghai, 25-30 September, 1996 : proceedings, p. 656-661.
Abstract: Ultrafine powder and thin films of lead lanthanum titanate (PLT) were prepared by the sol-gel process. The structural variation of the powder with increasing annealing temperature was monitored by differential thermal analysis, thermogravimetric analysis and x-ray diffraction. The lowest temperature for the formation of nanocrystals in the powder was found to be about 500°C. Crystallites of various sizes were obtained by controlling the annealing temperature and time. Thin films of PLT were fabricated by spin casting the sol-gel solution onto Si(111) substrates and the microstructure was analyzed using a scanning electron microscope. By controlling the concentration of the precursor and the processing temperature, PLT thin films with uniform crystallite size could be prepared.
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Type: Conference Paper
ISBN: 0-7803-2695-4
Appears in Collections:MRC Conference Papers & Presentations
AP Conference Papers & Presentations

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