Screen-printed perovskite-type thick films as gas sensors for environmental monitoring

Giuliano Martinelli; Maria Cristina Carotta; Matteo Ferroni; Yoshihiko Sadaoka; Enrico Traversa

doi:10.1016/S0925-4005(99)00054-4

Screen-printed perovskite-type thick films as gas sensors for environmental monitoring

Giuliano Martinelli, Maria Cristina Carotta, Matteo Ferroni, Yoshihiko Sadaoka, Enrico Traversa

Research output: Contribution to journal › Article › peer-review

243 Scopus citations

Abstract

Thick films of LaFeO₃ and SmFeO₃ were fabricated by screen-printing technology on alumina substrates with comb-type Au electrodes. The perovskite-type oxide powders used for the preparation of the thick films have been prepared by the thermal decomposition at 700 °C of hexacyanocomplexes, Ln[Fe(CN)₆]·nH₂O. These powders are ultrafine, homogeneous, and free of intragranular pores. The films have been fired at different temperatures in the 750-1000 °C range, in N₂ and air atmospheres. The gas-sensitive electrical response of the thick films have been tested in laboratory, in environments with different gases (CO and NO₂) in dry and wet air. For field tests, the prototype sensors have been placed beside a conventional station for environmental monitoring. The electrical response of the thick films has been compared with the results of the analytical instruments for environmental monitoring. The same trend was observed for both systems, with very promising results.

Original language	English (US)
Pages (from-to)	99-110
Number of pages	12
Journal	Sensors and Actuators, B: Chemical
Volume	55
Issue number	2
DOIs	https://doi.org/10.1016/S0925-4005(99)00054-4
State	Published - May 11 1999
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1016/S0925-4005(99)00054-4

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title = "Screen-printed perovskite-type thick films as gas sensors for environmental monitoring",

abstract = "Thick films of LaFeO3 and SmFeO3 were fabricated by screen-printing technology on alumina substrates with comb-type Au electrodes. The perovskite-type oxide powders used for the preparation of the thick films have been prepared by the thermal decomposition at 700 °C of hexacyanocomplexes, Ln[Fe(CN)6]·nH2O. These powders are ultrafine, homogeneous, and free of intragranular pores. The films have been fired at different temperatures in the 750-1000 °C range, in N2 and air atmospheres. The gas-sensitive electrical response of the thick films have been tested in laboratory, in environments with different gases (CO and NO2) in dry and wet air. For field tests, the prototype sensors have been placed beside a conventional station for environmental monitoring. The electrical response of the thick films has been compared with the results of the analytical instruments for environmental monitoring. The same trend was observed for both systems, with very promising results.",

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AU - Martinelli, Giuliano

AU - Carotta, Maria Cristina

AU - Ferroni, Matteo

AU - Sadaoka, Yoshihiko

AU - Traversa, Enrico

PY - 1999/5/11

Y1 - 1999/5/11

N2 - Thick films of LaFeO3 and SmFeO3 were fabricated by screen-printing technology on alumina substrates with comb-type Au electrodes. The perovskite-type oxide powders used for the preparation of the thick films have been prepared by the thermal decomposition at 700 °C of hexacyanocomplexes, Ln[Fe(CN)6]·nH2O. These powders are ultrafine, homogeneous, and free of intragranular pores. The films have been fired at different temperatures in the 750-1000 °C range, in N2 and air atmospheres. The gas-sensitive electrical response of the thick films have been tested in laboratory, in environments with different gases (CO and NO2) in dry and wet air. For field tests, the prototype sensors have been placed beside a conventional station for environmental monitoring. The electrical response of the thick films has been compared with the results of the analytical instruments for environmental monitoring. The same trend was observed for both systems, with very promising results.

AB - Thick films of LaFeO3 and SmFeO3 were fabricated by screen-printing technology on alumina substrates with comb-type Au electrodes. The perovskite-type oxide powders used for the preparation of the thick films have been prepared by the thermal decomposition at 700 °C of hexacyanocomplexes, Ln[Fe(CN)6]·nH2O. These powders are ultrafine, homogeneous, and free of intragranular pores. The films have been fired at different temperatures in the 750-1000 °C range, in N2 and air atmospheres. The gas-sensitive electrical response of the thick films have been tested in laboratory, in environments with different gases (CO and NO2) in dry and wet air. For field tests, the prototype sensors have been placed beside a conventional station for environmental monitoring. The electrical response of the thick films has been compared with the results of the analytical instruments for environmental monitoring. The same trend was observed for both systems, with very promising results.

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Screen-printed perovskite-type thick films as gas sensors for environmental monitoring

Abstract

ASJC Scopus subject areas

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