1. Elaboration and Characterization of Doped Barium Titanate Films for Gas Sensing.
- Author
-
Romh, M. A. El, Fasquelle, D., Députier, S., and Mascot, M.
- Subjects
BARIUM titanate films ,DOPING agents (Chemistry) ,GAS detectors ,THICK films ,CHEMICAL preparations industry ,SUBSTRATES (Materials science) ,ALUMINUM oxide - Abstract
Barium titanate (BaTiO
3 ) thick films were prepared from commercial powder to develop and optimize the film elaboration. Then, BaTiO3 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℃ 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℃ to 500℃. [ABSTRACT FROM AUTHOR]- Published
- 2014
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