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Title: Elaboration and characterization of doped barium titanate films for gas sensing

Barium titanate (BaTiO{sub 3}) thick films were prepared from commercial powder to develop and optimize the film elaboration. Then, BaTiO{sub 3} was doped by strontium and iron to increase the conductivity by a double substitution on site A and B of the perovskite structure in view to develop semiconductor gas sensors. Film inks were prepared by mixing BT and BSTF powder with an organic vehicle, using a ratio of 50:50; 60:40, respectively and deposited on alumina substrates. The BT and BSTF films were sintered at 1100°C for 2h. The structural and physical properties of the films have been studied by using X-ray diffraction (XRD) and scanning electron microscope (SEM). The dielectric measurements showed a huge increase in the a.c. conductivity for the BSTF films, by a factor of 10000 at low frequency, when the temperature ranges from 25°C to 500°C.
Authors:
; ;  [1] ;  [2]
  1. Unité de Dynamique et Structure des Matériaux Moléculaires (UDSMM), Université du Littoral Côte d'Opale (ULCO), BP717, 62228 Calais (France)
  2. UMR CNRS no. 6226 ISCR, Université de Rennes 1, Equipe Chimie du Solide et Matériaux (CSM), CS 74205, 35042 RENNES Cedex (France)
Publication Date:
OSTI Identifier:
22390532
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1627; Journal Issue: 1; Conference: 14. Electroceramics Conference, Bucharest (Romania), 16-20 Jun 2014; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM OXIDES; BARIUM COMPOUNDS; CRYSTAL STRUCTURE; DIELECTRIC MATERIALS; DOPED MATERIALS; ELECTRIC CONDUCTIVITY; FILMS; IRON COMPOUNDS; PEROVSKITE; POWDERS; SCANNING ELECTRON MICROSCOPY; SEMICONDUCTOR MATERIALS; STRONTIUM TITANATES; TEMPERATURE DEPENDENCE; X-RAY DIFFRACTION