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Title: An alternative gas sensor material: Synthesis and electrical characterization of SmCoO{sub 3}

Abstract

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.

Authors:
 [1];  [2];  [2];  [2];  [2]
  1. Departamento de Fisica CUCEI, Universidad de Guadalajara, Blvd. M. Garcia Barragan 1421, 44410 Guadalajara, Jalisco (Mexico). E-mail: michelucr@yahoo.es
  2. Departamento de Fisica CUCEI, Universidad de Guadalajara, Blvd. M. Garcia Barragan 1421, 44410 Guadalajara, Jalisco (Mexico)
Publication Date:
OSTI Identifier:
20900948
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 42; Journal 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)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM OXIDES; CARBON DIOXIDE; CHEMICAL PREPARATION; CITRIC ACID; ELECTRIC CONDUCTIVITY; ELECTRON MICROSCOPY; NITRATES; ORGANIC SOLVENTS; PEROVSKITE; POWDERS; SCREEN PRINTING; SENSITIVITY; SINTERING; SLURRIES; SUBSTRATES; THERMAL ANALYSIS; X-RAY DIFFRACTION

Citation Formats

Michel, Carlos Rafael, Delgado, Emilio, Santillan, Gloria, Martinez, Alma H., and Chavez-Chavez, Arturo. An alternative gas sensor material: Synthesis and electrical characterization of SmCoO{sub 3}. United States: N. p., 2007. Web. doi:10.1016/j.materresbull.2006.05.008.
Michel, Carlos Rafael, Delgado, Emilio, Santillan, Gloria, Martinez, Alma H., & Chavez-Chavez, Arturo. An alternative gas sensor material: Synthesis and electrical characterization of SmCoO{sub 3}. United States. doi:10.1016/j.materresbull.2006.05.008.
Michel, Carlos Rafael, Delgado, Emilio, Santillan, Gloria, Martinez, Alma H., and Chavez-Chavez, Arturo. Thu . "An alternative gas sensor material: Synthesis and electrical characterization of SmCoO{sub 3}". United States. doi:10.1016/j.materresbull.2006.05.008.
@article{osti_20900948,
title = {An alternative gas sensor material: Synthesis and electrical characterization of SmCoO{sub 3}},
author = {Michel, Carlos Rafael and Delgado, Emilio and Santillan, Gloria and Martinez, Alma H. and Chavez-Chavez, Arturo},
abstractNote = {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.},
doi = {10.1016/j.materresbull.2006.05.008},
journal = {Materials Research Bulletin},
number = 1,
volume = 42,
place = {United States},
year = {Thu Jan 18 00:00:00 EST 2007},
month = {Thu Jan 18 00:00:00 EST 2007}
}