Early stages of crystallization of sol-gel-derived lead zirconate titanate thin films

abstract

This article reports on the early stages of nucleation and growth and texture development of the perovskite phase in PZT(52/48) seeded and unseeded sol-gel thin films. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) revealed that, in seeded films, the perovskite phase nucleates and grows at the film surface, on seed particles and at the Pt/ PZT interface. In contrast, for unseeded films, nucleation and growth of the perovskite phase only occurs from the PZT/Pt interface. At low pyrolysis temperatures, the crystalline nucleation density is much higher in seeded than in unseeded films. The perovskite phase formation process is consequently accelerated by the presence of seeds. PZT thin films with 1 mol % seeds pyrolyzed at 430 degreesC for 40 h exhibit a dielectric permittivity of 500 and P, and E-c of 6.71 muC/cm(2) and 80 kV/cm, respectively. Seeded PZT films heat-treated at low temperatures (around 400 degreesC) may be suitable for applications in which deposition is required onto glass, metallic, or polymeric substrates.

keywords

PHASE-FORMATION; PZT FILMS; DECOMPOSITION; ORIENTATION; EVOLUTION; PBTIO3

subject category

Chemistry; Materials Science

authors

Wu, A; Vilarinho, PM; Reaney, I; Salvado, IMM

our authors

Share this project:

Related Publications

We use cookies for marketing activities and to offer you a better experience. By clicking “Accept Cookies” you agree with our cookie policy. Read about how we use cookies by clicking "Privacy and Cookie Policy".