A novel co-pptn. route for prepn. of a single-phase nanograined (Ti, Sn, Nb)O2 solid soln. was accomplished in the proportions Sn:Ti:Nb 100:42:5. Electron microscopy and x-ray diffraction were adopted to observe the morphol. and the structure. Calcination at 550, 650, 850 or 1050 for 2h, showed rutile-like single-phase. The powders were deposited as thick films through screen-printing technique to achieve gas sensors. SEM anal. of both powders and films showed regularly-shaped nanometric particles, the nanostructure being maintained up to 1050. The sensing layers, obtained from powders calcined at 550, and fired at 650 or 850, were tested vs. several reducing gases showing large responses to H with good selectivity.
Nanostructured (Sn, Ti, Nb)O2 solid solution for hydrogen sensing.
CAROTTA, Maria Cristina;GUIDI, Vincenzo;MALAGU', Cesare;MARTINELLI, Giuliano
2006
Abstract
A novel co-pptn. route for prepn. of a single-phase nanograined (Ti, Sn, Nb)O2 solid soln. was accomplished in the proportions Sn:Ti:Nb 100:42:5. Electron microscopy and x-ray diffraction were adopted to observe the morphol. and the structure. Calcination at 550, 650, 850 or 1050 for 2h, showed rutile-like single-phase. The powders were deposited as thick films through screen-printing technique to achieve gas sensors. SEM anal. of both powders and films showed regularly-shaped nanometric particles, the nanostructure being maintained up to 1050. The sensing layers, obtained from powders calcined at 550, and fired at 650 or 850, were tested vs. several reducing gases showing large responses to H with good selectivity.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
