The research into the preparation of lead zirconate titanate films by sol-gel in recent years has tended to use two different types of solvent: (i) alcohols (methoxyethanol, propandiol); (ii) fatty acids (acetic, propionic). This work has studied the effects of process variables on an acetic acid route proposed by Yi et al. a Lead II aceta,te, zirconium butoxide and titanium propoxide were dissolved, sequentially! in glacial acetic acid. A correct dehydration of the lead acetate and low temperature mixing was found to increase the stability of the solution. Acetylacetone (acac) stabilised the solution to a great extent and water, added after all the components were mixed had a more marked effect. The beneficial effects of acac and H20 were also seen. during the processing of the films. The solutions, spun onto platinum coated silicon substrates, were much more even coatings if they were modified. The amount of pyrochlore phase fell and the crystallisation temperature was significantly lowered.
IMPROVEMENTS TO PZT FILM PREPARATION USING ACETIC ACID AS THE SOL VENT: ADDITIVES AND HEAT TREATMENTS
G Bocelli;BE Watts;
1996
Abstract
The research into the preparation of lead zirconate titanate films by sol-gel in recent years has tended to use two different types of solvent: (i) alcohols (methoxyethanol, propandiol); (ii) fatty acids (acetic, propionic). This work has studied the effects of process variables on an acetic acid route proposed by Yi et al. a Lead II aceta,te, zirconium butoxide and titanium propoxide were dissolved, sequentially! in glacial acetic acid. A correct dehydration of the lead acetate and low temperature mixing was found to increase the stability of the solution. Acetylacetone (acac) stabilised the solution to a great extent and water, added after all the components were mixed had a more marked effect. The beneficial effects of acac and H20 were also seen. during the processing of the films. The solutions, spun onto platinum coated silicon substrates, were much more even coatings if they were modified. The amount of pyrochlore phase fell and the crystallisation temperature was significantly lowered.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
