Synthesis and thermoelectric properties of polycrystalline bi-sb alloys.
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Rodríguez, J. E.
Cadavid, D.
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2007
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Se estudia el comportamiento de las propiedades termoeléctricas de compuestos policristalinos de Bi0.88Sb0.12 preparados por el método de reacción de estado sólido. Las propiedades eléctricas y térmicas se estudiaron a partir de mediciones de coeficiente Seebeck S(T), resistividad eléctrica p(T) y conductividad térmica k(T) en función de la temperatura, en el rango de temperatura entre 77 y 300K. A partir del estudio de las propiedades de transporte se determinó el factor de potencia P F y la figura de mérito adimensional ZT, las cuales alcanzan máximos valores cercanos a 20 uW/K2 - cm y 0.35, respectivamente. Adicionalmente, las propiedades morfológicas y estructurales se estudiaron a partir del análisis de microscopía electrónica de barrido y difracción de rayos-x.
We have studied the behavior of thermoelectric properties of Bi0.88Sb0.12 polycrystalline samples grown by solid state reaction method. The electrical and thermal properties of the samples were obtained by Seebeck coefficient S(T), electrical resistivity p(T) and thermal conductivity k(T) measurements as a function of temperature, in the temperature range between 77 and 300K. From S(T), p(T) and k(T) data it was possible to determine the thermoelectric power factor PF and the dimensionless figure of merit ZT, which reach maximum values close to 20 uW/K2 - cm and 0.35, respectively. Additionally, the structural and morphological properties of the samples were studied by power x-ray diffraction analysis (XRD) and scanning electron microscopy (SEM), respectively.
We have studied the behavior of thermoelectric properties of Bi0.88Sb0.12 polycrystalline samples grown by solid state reaction method. The electrical and thermal properties of the samples were obtained by Seebeck coefficient S(T), electrical resistivity p(T) and thermal conductivity k(T) measurements as a function of temperature, in the temperature range between 77 and 300K. From S(T), p(T) and k(T) data it was possible to determine the thermoelectric power factor PF and the dimensionless figure of merit ZT, which reach maximum values close to 20 uW/K2 - cm and 0.35, respectively. Additionally, the structural and morphological properties of the samples were studied by power x-ray diffraction analysis (XRD) and scanning electron microscopy (SEM), respectively.