Pyroelectric properties of sol-gel derived PZT thin films with various Zr/Ti ratios

G. Teowee, F. S. McCarthy, K. C. McCarthy, B. H. Dietz, D. R. Uhlmann

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Integrated pyroelectric arrays are receiving serious attention for the next generation of room temperature uncooled IR cameras. Such pyroelectric arrays are based on monolithic ferroelectric(FE) thin films. FE films with large values of reported pyroelectric coefficients include PbTiO3, Ca-doped PbTiO3, La-doped PbTiO3, PZT 53/47 and Pb(Sc0.5Ta0.5)O3. The present paper reports a systematic study of the compositional dependence of PZT thin films on their pyroelectric properties. A series of sol-gel derived PZT (lead zirconate titanate) thin films with various Zr/Ti ratios, namely, PbTiO3, PZT 20/80, PZT 35/65, PZT 53/47, PZT 65/35, PZT 92/8 and PbZrO3, were prepared on platinized Si substrates. The films were fired to 650-700°C to crystallize them into single-phase perovskite. The degree of preferred orientation, grain size and firing temperature affect the pyroelectric responses. Pyroelectric coefficients as large as 2.5 × 10-8 C/cm2-K were obtained, making such PZT thin films attractive in pyroelectric arrays.

Original languageEnglish (US)
Pages (from-to)431-438
Number of pages8
JournalIntegrated Ferroelectrics
Volume22
Issue number1-4
DOIs
StatePublished - Jan 1 1998

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Control and Systems Engineering
  • Ceramics and Composites
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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