(Pb, La)(Zr, Ti)O₃ Films by Multiple Electrophoretic Deposition/Sintering Processing

Abstract

(Pb, La)(Zr, Ti)O3 films were prepared by multiple (electro-phoretic deposition/sintering) cycles, using fine crystalline powders, acetone, nitrocellulose and HNO3 as suspensions. Dense, strong films having a final thickness of 15∼25 µm were formed reproducibly on platinum substrates. Due to tight contact between the film and rigid substrate, during firing, lattice constants of sintered films were 0.3∼0.5% longer than those of bulk with the same composition. Reflecting these lattice expansions, the Curie temperature of sintered films shifted to higher temperature as compared to that of bulks with the same composition. All films with the composition 8/65/35 and 9/65/35 are ferroelectric and thus exhibit pyroelectric, and piezoelectric activities. These characteristics of the films are modified from those of the bulk form by crystal lattice distortion.

Piezoelectric materials for high frequency medical imaging applications: A review

“…Therefore, piezoelectric thin/thick film technology may be a good low-cost alternative solution for high frequency transducer (100-200 MHz) designs. However, the only drawback to using these materials is their inferior piezoelectric properties when compared to bulk produced piezoceramics [42][43][44][45][46][47][48].…”

“…Sugiyama et al [42] prepared PLZT thick films by a multiple electrophoretic deposition and sintering processes. Barrow et al [43] and Lukacs et al [44] have reportedly used thick PZT ceramic coatings using sol-gel derived porous 0-3 composites to produce high frequency single element transducers.…”

Lead zirconate titanate films on metallic substrates by electrophoretic deposition

“…The formation of piezoelectric layers by EPD has been explored in the past; some work has been carried out recently on barium titanate ceramics [10,11], however most research efforts have been devoted to the production of lead zirconate titanate (PZT) films, coatings and free standing objects [12][13][14][15][16][17][18][19][20][21]. PZT exhibits the largest known piezoelectric response and PZT films formed by EPD on planar and non-planar surfaces have huge potential for applications in piezoelectric composites, micro-actuators, smart microdevices, sensors and in micro-electromechanical applications [22][23][24][25][26][27][28][29][30][31].…”

Structural and dielectric properties of Pb(Zr,Ti)O3 heterolayered thick films

“…the thickness of the resultant films were usually less than 1 m. There are some reports on fabrication of PZT thick films by sol-gel method, screen-printing method, sputtering method and hydrothermal synthesis method [5,6]. The screen-printing method is especially useful for a high productivity and good cost performance which brings the films to the stage of commercial mass production [7].…”