An alternative gas sensor material: Synthesis and electrical characterization of SmCoO{sub 3}
- Departamento de Fisica CUCEI, Universidad de Guadalajara, Blvd. M. Garcia Barragan 1421, 44410 Guadalajara, Jalisco (Mexico)
Single-phase perovskite SmCoO{sub 3} was prepared by a wet-chemical synthesis technique using metal-nitrates and citric acid; after its characterization by thermal analyses and X-ray diffraction, sintering at 900 deg. C in air, gave single phase and well crystallized powders. The powders were mixed with an organic solvent to prepare a slurry, which was deposited on alumina substrates as thick films, using the screen-printing technique. Electrical and gas sensing properties of sintered SmCoO{sub 3} films were investigated in air, O{sub 2} and CO{sub 2}, the results show that sensitivity reached a maximum value at 420 deg. C, for both gases. Dynamic tests revealed a better behavior of SmCoO{sub 3} in CO{sub 2} than O{sub 2}, due to a fast response and a larger electrical resistance change to this gas. X-ray diffraction made on powders after electrical characterization in gases, showed that perovskite-type structure was preserved.
- OSTI ID:
- 20900948
- Journal Information:
- Materials Research Bulletin, Vol. 42, Issue 1; Other Information: DOI: 10.1016/j.materresbull.2006.05.008; PII: S0025-5408(06)00206-6; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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