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. © 2003 Elsevier Ltd. All rights reserved.

Carotta, M.C., Ferroni, M., Gherardi, S., Guidi, V., Malagù, C., Martinelli, G., et al. (2004). Thick-film gas sensors based on vanadium-titanium oxide powders prepared by sol-gel synthesis. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 24(6), 1409-1413 [10.1016/S0955-2219(03)00418-7].

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

DI VONA, MARIA LUISA;LICOCCIA, SILVIA;TRAVERSA, ENRICO
2004

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. © 2003 Elsevier Ltd. All rights reserved.
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore CHIM/07 - Fondamenti Chimici delle Tecnologie
Settore ING-IND/22 - Scienza e Tecnologia dei Materiali
eng
Con Impact Factor ISI
ELECTRICAL PROPERTIES, GAS SENSORS, GRAIN SIZE, SOL-GEL PROCESSES, TIO2
Carotta, M.C., Ferroni, M., Gherardi, S., Guidi, V., Malagù, C., Martinelli, G., et al. (2004). Thick-film gas sensors based on vanadium-titanium oxide powders prepared by sol-gel synthesis. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 24(6), 1409-1413 [10.1016/S0955-2219(03)00418-7].
Carotta, M; Ferroni, M; Gherardi, S; Guidi, V; Malagù, C; Martinelli, G; Sacerdoti, M; DI VONA, Ml; Licoccia, S; Traversa, E
Articolo su rivista
File in questo prodotto:
File Dimensione Formato  
thick-film.pdf

accesso aperto

Dimensione 379.48 kB
Formato Adobe PDF
379.48 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/15152
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 29
  • ???jsp.display-item.citation.isi??? 24
social impact