Thick films based on nanosized titania powders have been prepared and characterized. Addition of suitable dopant affected film evolution upon annealing as both anatase-rutile phase transition and grain growth are inhibited. Ta and Nb addition to the TiO2 powder proved effective for stabilization of the nanophase, as the average grain size was reduced from 110 to 35 and 45nm, respectively. Electrical measurements indicated selectivity enhancement towards CO and required film preparation to stabilize the film's grain size below 50nm.
Preparation and characterization of nanosized titania sensing film
FERRONI, Matteo;CAROTTA, Maria Cristina;GUIDI, Vincenzo;MARTINELLI, Giuliano;RONCONI, Franco;SACERDOTI, Michele;
2001
Abstract
Thick films based on nanosized titania powders have been prepared and characterized. Addition of suitable dopant affected film evolution upon annealing as both anatase-rutile phase transition and grain growth are inhibited. Ta and Nb addition to the TiO2 powder proved effective for stabilization of the nanophase, as the average grain size was reduced from 110 to 35 and 45nm, respectively. Electrical measurements indicated selectivity enhancement towards CO and required film preparation to stabilize the film's grain size below 50nm.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
