Characterization of lead titanate nanopowders prepared with low temperature sol-gel route

Enhessari, M. and Khanahmadzadeh, S. Characterization of lead titanate nanopowders prepared with low temperature sol-gel route. In: 11th Iranian Physical Chemistry Seminar-July 2008, July 2008, Ardabil, Iran.

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Abstract

Lead titanate (PbTiO3) is a promising ferroelectric material and has been the focus of much attention for various device applications, such as non-volatile memories, actuators and transducers due to their excellent piezoelectric and electrooptic properties. It shows an order of magnitude lower dielectric constant (~200) compared to barium titanate and PZT ceramics, a high curie point of ~490 °C [1-3]. Many methods have been applied to prepare lead titanate powders, such as sol–gel method [4-6], co-precipitation [7-10] and hydrothermal synthesis [11-14], besides the traditional solid-state reaction of mixed oxides [15]. Sol–gel route is proved to be a very commonly applied chemical method for fabricating uniform large area thin films and synthesizing powders of micrometer, sub-micrometer, or nanometer size with high purity and homogeneity. Furthermore, the morphology of the particles could be easily controlled by changing the synthesis parameters [16-17]. In this paper, we focus on a sol–gel synthesis method of PbTiO3 based on a metal– citrate complex system reported recently. This method herein offers an easy route to shorten the procedures, save energy, easily control the final stoichiometry of PbTiO3 composition and lead to uniform, fine powders.

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