Preparation and tunability properties of Ba(Zrx Ti1-x)O3 thin films grown by a sol-gel process

Jiwei Zhai*, Dan Hu, Xi Yao, Zhengkui Xu, H. D. Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

Ba(ZrxTi1-x)O3 (BZT) thin films were deposited via sol-gel process on LaNiO3, as buffer layer, and Pt-coated silicon substrates. The BZT films were perovskite phase and showed a (1 0 0) preferred orientation dependent upon zirconium content. The grain size decreased and the microstructure became dense with increasing zirconium content. The addition of Zr to the BaTiO3 lattice decreased the grain size of the crystallized films. The temperature dependent dielectric constant revealed that the thin films have relaxor behavior and diffuse phase transition characteristics that depend on the substitution of Zr for Ti in BaTiO3. The dependence of electrical properties on film thickness has been studied, with the emphasis placed on dielectric nonlinear characteristics. Ba(Zr0.35Ti65)O3 thin films with weak temperature dependence of tunability in the temperature range from 0 to 130 °C could be attractive materials for situations in which precise control of temperature would be either impossible or too expensive.

Original languageEnglish
Pages (from-to)1917-1920
Number of pages4
JournalJournal of the European Ceramic Society
Volume26
Issue number10-11
DOIs
StatePublished - 11 Apr 2006

Keywords

  • Dielectric properties
  • Films
  • Perovskites
  • Sol-gel processes
  • Tunability

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