Dielectric properties of spray deposited BaTiO3 and Ba0.68Sr0.32TiO3

Kipyung Ahn, Bruce W. Wessels, Robert Greenlaw, Sanjay Sampath

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The microstructure and dielectric properties of BaTiO3 and Ba0.68Sr0.32TiO3 thick films deposited by thermal spray were investigated. The as-deposited films were predominantly crystalline with a small amount of an amorphous second phase. The as-deposited BaTiO3 films had dielectric constants as high as 240 at room temperature. Upon annealing in air at 500°C, the dielectric constant increased to 480. This increase in dielectric constant was attributed, in part, to the crystallization of the amorphous second phase. The stabilized phase depended on the spray process used. The high velocity oxy fuel (HVOF) spray process resulted in the deposition of paraelectric BaTiO3, whereas the plasma spray process resulted in the ferroelectric phase.

Original languageEnglish (US)
Pages (from-to)287-292
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume698
StatePublished - Jan 1 2002

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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