Method of preparing a stable lead zircon-titanate sol and method for preparing films based on same
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United States of America Patent
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Oct 26, 2010
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Sep 19, 2002
filing date -
Sep 20, 2001
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Abstract
A method of preparing a sol of lead zirconium titanate, known as PZT, of formula PbZr.sub.xTi.sub.(1-x)O.sub.3 with 0.45.ltoreq.x.ltoreq.0.7, comprises the steps of: (a) preparing a concentrated sol in a diol, the sol comprising a titanium-based precursor, a zirconium-based precursor, and a lead-based precursor; (b) placing the concentrated sol at ambient temperature without agitation, until a sol is obtained having a constant viscosity as a function of time; (c) diluting the sol obtained in (b) with a solvent compatible with the diol used in step (a). The sol is useful for preparing PZT-based films for use in the electronics field.
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