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Recommended Papers for: electrical resistance

Total Papers Found: 16

Thermoelectric Properties of Ca3xDyxCo4O9+d with x = 0.00, 0.02, 0.05, and 0.10

The low-temperature thermoelectric properties of Ca3-xDyxCo4O9+delta systems (x = 0, 0.02, 0.05, and 0.10). It was determined that these systems produced positive thermopower, indicating that the dominant carriers were holes. The electrical resistivity and thermal conductivity were found to decrease with increasing Dy3+ content, and the thermopower was found to increase. The highest calculated thermoelectric figure of merit was 0.044, and this was calculated for the Ca2.9Dy0.1Co4O9+delta sample....

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Low-Temperature thermoelectric and magnetic characteristics of Ca2.9Bi0.1Co4−xFexO9+delta (0 < x < 0.10)

Thermoelectric materials are currently being researched as a source of energy in order to reduce carbon dioxide emissions. The efficiency of these materials depends on their Seebeck coefficient, electrical resistivity, and thermal conductivity, as well as the absolute temperature. Cobalt oxides (Ca3Co4O9+delta) have been researched extensively as potential thermoelectric materials because of their high Seebeck coefficient and low electrical resistivity and thermal conductivity. Systems have been studied ...

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Thermoelectric properties of n-type Ca(1-x)Bi(x)Mn(1-y)Si(y)O(3-delta) (x = y = 0.00, 0.02, 0.03, 0.04, and 0.05) system

CaMnO3 has been proposed for use in thermoelectric materials, due to its favourable thermoelectric properties. In this article, the effect of doping using bismuth and silicon to replace calcium and manganese respectively has been studied. Important properties of the doped compounds measured include thermopower, thermal conductivity, and electrical resistance. Different amounts of dopant are used, and it was determined that the compound Ca0.98Bi0.02Mn0.98Si0.02O3 has the highest ...

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Experimental and Model Research on Nanorefrigerant Thermal Conductivity

Describes how second-order terms are important to the hot-strip method, and should be included in situations where a high-current pulse is being used. The authors determined approximate values for the coefficients of second-order terms....

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Towards Thermoconductive, Electrically Insulating Polymeric Composites with Boron Nitride Nanotubes as Fillers

In this experiment, the thermal conductivity of several composites, with varying matrix composition and boron nitride nanotubes fillers, was investigated. Poly(methyl methacrylate), polystyrene, poly(vinyl butyral) and poly(ethylene vinyl alcohol) were the matrix compositions analyzed. The results indicated that with the addition of the boron nitride nanotube fillers, there was a 20-fold increase in the thermal conductivity of the polymer. Several other properties were analyzed alongside of thermal ...

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