INVESTIGADORES
PONCE Miguel Adolfo
artículos
Título:
Conductance analysis of (Co, Nb, Fe)-doped SnO2 thick film gas sensors. Journal of Electroceramics
Autor/es:
11. M. A. PONCE, R. PARRA, M. S. CASTRO, C. M. ALDAO
Revista:
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Editorial:
Springer
Referencias:
Lugar: Viena; Año: 2007 vol. 18 p. 1171 - 1177
ISSN:
0957-4522
Resumen:
Abstract Thick films prepared with undoped nanometric
SnO2 particles and with (Co, Nb, Fe)-doped SnO2 were
studied with the purpose of developing oxygen and carbon
monoxide gas sensors. The ceramic powders were obtained
through the Pechini method. The morphological characteristics
were studied with SEM and TEM, after which,
they were subjected to sensitivity tests under different
atmospheres. A correlation was established between the
microstructure of the material, the effects of the additives,
and the electrical behavior. The response of the sensor
could be explained as the result of the characteristics of the
intergranular potential barriers developed at intergrains. It
was determined that the SnO2-doped films have a greater
sensitivity between 200 C and 350 C.Thick films prepared with undoped nanometric
SnO2 particles and with (Co, Nb, Fe)-doped SnO2 were
studied with the purpose of developing oxygen and carbon
monoxide gas sensors. The ceramic powders were obtained
through the Pechini method. The morphological characteristics
were studied with SEM and TEM, after which,
they were subjected to sensitivity tests under different
atmospheres. A correlation was established between the
microstructure of the material, the effects of the additives,
and the electrical behavior. The response of the sensor
could be explained as the result of the characteristics of the
intergranular potential barriers developed at intergrains. It
was determined that the SnO2-doped films have a greater
sensitivity between 200 C and 350 C.2 particles and with (Co, Nb, Fe)-doped SnO2 were
studied with the purpose of developing oxygen and carbon
monoxide gas sensors. The ceramic powders were obtained
through the Pechini method. The morphological characteristics
were studied with SEM and TEM, after which,
they were subjected to sensitivity tests under different
atmospheres. A correlation was established between the
microstructure of the material, the effects of the additives,
and the electrical behavior. The response of the sensor
could be explained as the result of the characteristics of the
intergranular potential barriers developed at intergrains. It
was determined that the SnO2-doped films have a greater
sensitivity between 200 C and 350 C.2-doped films have a greater
sensitivity between 200 C and 350 C.