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Titolo:
GAS-SENSITIVE ELECTRICAL-PROPERTIES OF PEROVSKITE-TYPE SMFEO3 THICK-FILMS
Autore:
CAROTTA MC; MARTINELLI G; SADAOKA Y; NUNZIANTE P; TRAVERSA E;
Indirizzi:
UNIV FERRARA,INFM,DIPARTIMENTO FIS,VIA PARADISO 12 I-44100 FERRARA ITALY EHIME UNIV,FAC ENGN,DEPT MAT SCI & ENGN MATSUYAMA EHIME 79077 JAPAN UNIV ROMA TOR VERGATA,DIPARTIMENTO SCI & TECNOL CHIM I-00133 ROME ITALY
Titolo Testata:
Sensors and actuators. B, Chemical
fascicolo: 1-3, volume: 48, anno: 1998,
pagine: 270 - 276
SICI:
0925-4005(1998)48:1-3<270:GEOPST>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
THERMAL-DECOMPOSITION; HETERONUCLEAR COMPLEXES; OXYGEN SENSORS; OXIDES; ELECTRODES;
Keywords:
GAS-SENSITIVE; THICK FILMS; PEROVSKITE-TYPE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
26
Recensione:
Indirizzi per estratti:
Citazione:
M.C. Carotta et al., "GAS-SENSITIVE ELECTRICAL-PROPERTIES OF PEROVSKITE-TYPE SMFEO3 THICK-FILMS", Sensors and actuators. B, Chemical, 48(1-3), 1998, pp. 270-276

Abstract

Ultrafine SmFeO3 powders have been prepared by the thermal decomposition at 700 degrees C of the corresponding hexacyanocomplex, Sm[Fe(CN)(6)]. 4H(2)O. These powders have been used for the preparation of thickfilms, screen-printed on alumina substrates with comb-type Au electrodes. The electrical response of the films fired at 750 degrees C, in N-2 and air atmospheres, prepared from pastes with different composition of the organic vehicle (o.v.), showed that they were sensitive to COand NO2 in dry and wet air. The composition of the o.v. strongly influenced the electrical conductivity and its activation energy and the gas response of the SmFeO3 films, which had similar microstructure. Thepresence in the o.v. of components with hydroxyl groups causes a reaction with adsorbed oxygen species, which results in an increase in thefilms resistivity, being SmFeO3 a p-type semiconductor and in their NO2 response. The thick film processing parameters are thus of primary concern for the NO2 sensing properties of the SmFeO3 thick films. (C) 1998 Published by Elsevier Science S.A. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 09:07:44