Artículo
Grain boundary and grain interior conduction in γ′-Bi2MoO6
Fecha de publicación:
07/2005
Editorial:
Elsevier Science
Revista:
Materials Science and Engineering B: Solid State Materials for Advanced Technology
ISSN:
0921-5107
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Impedance spectroscopy of fine grained (<10 μm) γ′- Bi2MoO6 samples, in the frequency range of 0.1 Hz-250 kHz, relevant to sensor applications, up to 800°C, has been used to characterize grain boundary and grain interior contributions to conduction. Above 500°C, the grain boundary contribution is no longer rate limiting and conduction is dominated by the grain interior component. The corresponding activation energies are 0.98 eV for grain boundary and 0.73 eV for grain interior components. The weak dependence of conductivity on oxygen partial pressure below 500°C can be attributed to electrode-electrolyte interface phenomena, whereas the robust response to ethanol is commensurate with changes in intrinsic ionic conductivity.
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Articulos(UNIDEF)
Articulos de UNIDAD DE INVESTIGACION Y DESARROLLO ESTRATEGICOS PARA LA DEFENSA
Articulos de UNIDAD DE INVESTIGACION Y DESARROLLO ESTRATEGICOS PARA LA DEFENSA
Citación
Vera, C. M. C.; Aragon, Ricardo; Grain boundary and grain interior conduction in γ′-Bi2MoO6; Elsevier Science; Materials Science and Engineering B: Solid State Materials for Advanced Technology; 121; 1-2; 7-2005; 187-191
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