Thick-film gas sensors based on vanadium-titanium oxide powders prepared by sol-gel synthesis

Maria Cristina Carotta; Matteo Ferroni; Sandro Gherardi; Vincenzo Guidi; Cesare Malagù; Giuliano Martinelli; Michele Sacerdoti; Maria Luisa Di Vona; Silvia Licoccia; Enrico Traversa

doi:10.1016/S0955-2219(03)00418-7

Thick-film gas sensors based on vanadium-titanium oxide powders prepared by sol-gel synthesis

Maria Cristina Carotta^*, Matteo Ferroni, Sandro Gherardi, Vincenzo Guidi, Cesare Malagù, Giuliano Martinelli, Michele Sacerdoti, Maria Luisa Di Vona, Silvia Licoccia, Enrico Traversa

^*Corresponding author for this work

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

30 Scopus citations

Abstract

Two titania powders modified by 10 at.% of vanadium were prepared by two different sol-gel routes. The powders fired at 650 °C had the rutile structure. These powders were used to produce prototype thick-film sensors. Four series of thick-film samples were fabricated by screen-printing, fired for 1 h at 650 and 850 °C. The morphology and gas-sensing properties were examined and compared with those of pure and Ta-added titania films, previously studied by the authors. Ta addition inhibited the anatase-to-rutile phase transformation during heating and was also effective in keeping the TiO₂ grain size in the nanometre range. On the contrary, V addition facilitated the anatase-to-rutile phase transformation. Thick films obtained from the two powders had similar conductance behaviour vs. temperature. The gas response of the films was affected by both the grain size and firing temperature.

Original language	English (US)
Pages (from-to)	1409-1413
Number of pages	5
Journal	Journal of the European Ceramic Society
Volume	24
Issue number	6
DOIs	https://doi.org/10.1016/S0955-2219(03)00418-7
State	Published - Jun 2004
Externally published	Yes

Bibliographical note

Funding Information:
This work was partly supported by the Ministry of Education, University and Research (MIUR) of Italy. The authors wish to thank Ms. Cadia D'Ottavi (University of Rome Tor Vergata) for her valuable technical assistance.

Keywords

Electrical properties
Gas sensors
Grain size
Sol-gel processes
TiO

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

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10.1016/S0955-2219(03)00418-7

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title = "Thick-film gas sensors based on vanadium-titanium oxide powders prepared by sol-gel synthesis",

abstract = "Two titania powders modified by 10 at.% of vanadium were prepared by two different sol-gel routes. The powders fired at 650 °C had the rutile structure. These powders were used to produce prototype thick-film sensors. Four series of thick-film samples were fabricated by screen-printing, fired for 1 h at 650 and 850 °C. The morphology and gas-sensing properties were examined and compared with those of pure and Ta-added titania films, previously studied by the authors. Ta addition inhibited the anatase-to-rutile phase transformation during heating and was also effective in keeping the TiO2 grain size in the nanometre range. On the contrary, V addition facilitated the anatase-to-rutile phase transformation. Thick films obtained from the two powders had similar conductance behaviour vs. temperature. The gas response of the films was affected by both the grain size and firing temperature.",

keywords = "Electrical properties, Gas sensors, Grain size, Sol-gel processes, TiO",

author = "Carotta, {Maria Cristina} and Matteo Ferroni and Sandro Gherardi and Vincenzo Guidi and Cesare Malag{\`u} and Giuliano Martinelli and Michele Sacerdoti and {Di Vona}, {Maria Luisa} and Silvia Licoccia and Enrico Traversa",

note = "Funding Information: This work was partly supported by the Ministry of Education, University and Research (MIUR) of Italy. The authors wish to thank Ms. Cadia D'Ottavi (University of Rome Tor Vergata) for her valuable technical assistance.",

year = "2004",

month = jun,

doi = "10.1016/S0955-2219(03)00418-7",

language = "English (US)",

volume = "24",

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AU - Carotta, Maria Cristina

AU - Ferroni, Matteo

AU - Gherardi, Sandro

AU - Guidi, Vincenzo

AU - Malagù, Cesare

AU - Martinelli, Giuliano

AU - Sacerdoti, Michele

AU - Di Vona, Maria Luisa

AU - Licoccia, Silvia

AU - Traversa, Enrico

N1 - Funding Information: This work was partly supported by the Ministry of Education, University and Research (MIUR) of Italy. The authors wish to thank Ms. Cadia D'Ottavi (University of Rome Tor Vergata) for her valuable technical assistance.

PY - 2004/6

Y1 - 2004/6

N2 - Two titania powders modified by 10 at.% of vanadium were prepared by two different sol-gel routes. The powders fired at 650 °C had the rutile structure. These powders were used to produce prototype thick-film sensors. Four series of thick-film samples were fabricated by screen-printing, fired for 1 h at 650 and 850 °C. The morphology and gas-sensing properties were examined and compared with those of pure and Ta-added titania films, previously studied by the authors. Ta addition inhibited the anatase-to-rutile phase transformation during heating and was also effective in keeping the TiO2 grain size in the nanometre range. On the contrary, V addition facilitated the anatase-to-rutile phase transformation. Thick films obtained from the two powders had similar conductance behaviour vs. temperature. The gas response of the films was affected by both the grain size and firing temperature.

AB - Two titania powders modified by 10 at.% of vanadium were prepared by two different sol-gel routes. The powders fired at 650 °C had the rutile structure. These powders were used to produce prototype thick-film sensors. Four series of thick-film samples were fabricated by screen-printing, fired for 1 h at 650 and 850 °C. The morphology and gas-sensing properties were examined and compared with those of pure and Ta-added titania films, previously studied by the authors. Ta addition inhibited the anatase-to-rutile phase transformation during heating and was also effective in keeping the TiO2 grain size in the nanometre range. On the contrary, V addition facilitated the anatase-to-rutile phase transformation. Thick films obtained from the two powders had similar conductance behaviour vs. temperature. The gas response of the films was affected by both the grain size and firing temperature.

KW - Electrical properties

KW - Gas sensors

KW - Grain size

KW - Sol-gel processes

KW - TiO

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Thick-film gas sensors based on vanadium-titanium oxide powders prepared by sol-gel synthesis

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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