title: High-performance PMN-PT thick films.
abstract: This article describes some of our work on ₀.₆₅Pb(Mg₁/₃Nb(₂/₃)O₃-₀.₃₅PbTiO₃ (0.65PMN-0.35PT) thick films printed on alumina substrates. These thick films, with the nominal composition ₀.₆₅Pb(Mg₁/₃Nb(₂/₃)O₃-₀.₃₅PbTiO₃, were produced by screen-printing and firing a paste prepared from an organic vehicle and pre-reacted fine particles of avery chemically homogeneous powder. To improve the adhesion of the 0.65PMN-0.35PT to the platinized alumina substrate,a Pb(Zr₀.₅₃Ti₀.₄₇)O₃ layer was deposited between the electrode and the substrate. The samples were then sintered at 950 °C for 2 h with various amounts of packing powder on the alumina (Al₂O₃) substrates. The sintering procedure was optimized to obtain dense 0.65PMN-0.35PT films. The films were then characterized using scanning electron microscopy as well as measurements of the dielectric and piezoelectric constants.The electrostrictive behavior of the 0.65PMN-0.35PT thick films was investigated using an atomic force microscope(AFM). Finally, substrate-free, large-displacement bending type actuators were prepared and characterized, and the normalized displacement (i.e., the displacement per unit length) of the actuators was determined to be 55 μm/cm at 3.6 kV/cm.
authors.affiliation: Jožef Stefan Institute, Ljubljana, Slovenia.
authors.forename: Marija
authors.initials: M
authors.lastname: Kosec
authors.forename: Hana
authors.initials: H
authors.lastname: Ursic
authors.forename: Janez
authors.initials: J
authors.lastname: Holc
authors.forename: Marko
authors.initials: M
authors.lastname: Hrovat
authors.forename: Danjela
authors.initials: D
authors.lastname: Kuscer
authors.forename: Barbara
authors.initials: B
authors.lastname: Malic