Patent Number: 7,820,723

Title: Method of preparing a stable lead zircon-titanate sol and method for preparing films based on same

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.

Inventors: Belleville; Philippe (Tours, FR), Boy; Philippe (Joue les Tours, FR), Montouillout; Yves (Bretteville l'orgueilleuse, FR)

Assignee: Commissariat a l'Energie Atomique

International Classification: C04B 35/624 (20060101); C04B 35/622 (20060101); B01F 3/22 (20060101); H01L 21/8246 (20060101); H01L 27/105 (20060101)

Expiration Date: 2018-10-26 0:00:00