Deposition of multifunctional titania ceramic films by aerosol routes

Guixiang Yang, Pratim Biswas, Punit Boolchand, Ashok Sabata

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Aerosol coating processes were developed to deposit titania ceramic films onto steel and silica substrates. In situ light-scattering measurements were used to understand the deposition mechanisms in different system configurations. The conditions that were necessary to obtain uniform, non-porous, and well-adhered titania films on steel substrates were established. The as-coated films had excellent anticorrosion characteristics at room temperature, as established by the standard salt-fog test. Film crystallinity and morphology were examined using X-ray diffractometry and scanning electron microscopy; these analysis methods revealed an oriented, nanocrystalline anatase phase. Film composition was established, as a function of film thickness, using Auger electron spectroscopy and was confirmed to be stoichiometric (Ti:O = 1:2). The optical band gap and optical phonons of the deposited films were probed using spectrophotometry and Raman scattering, respectively; these analysis methods revealed a blue shift of the gap, relative to bulk anatase, and a localization of carriers in the nanometer-sized crystallites.

Original languageEnglish (US)
Pages (from-to)2573-2579
Number of pages7
JournalJournal of the American Ceramic Society
Volume82
Issue number10
DOIs
StatePublished - 1999
Externally publishedYes

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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