Effect of Ag additions on the Bi&lt;sub&gt;1.6&lt;/sub&gt;Pb&lt;sub&gt;0.4&lt;/sub&gt;Sr&lt;sub&gt;2&lt;/sub&gt;Co&lt;sub&gt;1.8&lt;/sub&gt;O&lt;sub&gt;x&lt;/sub&gt; thermoelectric properties

Díez, J. C.; Rasekh, Sh.; Constantinescu, G.; Torres, Miguel; Madre, M. A.; Sotelo, A.

doi:10.3989/cyv.122013

Cited by 2 publications

(1 citation statement)

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“…In order to estimate the accuracy of these fittings, the profile factor (R p ), weighted profile factor (R wp ), and Bragg factor (R B ) have been obtained following the procedure reported in [32] and summarized in Table I. On the other hand, when observing the figure it is clear that, at least, some part of Ag is kept as metallic one, in agreement with previously reported data in similar systems [34,35]. On the other hand, it could be considered that some part of Ag might be inserted in the crystal structure [25,36] due to the similar ionic radii of Ag + , Bi 3+ , and Ca 2+ .…”

Section: Resultssupporting

confidence: 75%

Role of Ag in textured-annealed Bi2Ca2Co1.7Ox thermoelectric ceramic

et al. 2016

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Bi 2 Ca 2 Co 1.7 O x thermoelectric ceramics with small Ag additions (0, 1, 2, 3, 4, and 5 wt.%) have been successfully grown from the melt, using the laser floating zone method and subsequently annealed at 800 ºC for 24 h. The microstructure has shown a reduction of the amount of secondary phases for Ag contents up to 4 wt.%.This microstructural evolution leads to a decrease of the electrical resistivity values until an Ag content of 4 wt.%, whereas Seebeck coefficient has been maintained unchanged. This is in agreement with the presence of metallic Ag in all samples, confirmed not only by Energy Dispersive Spectrometry but also by X-ray photoelectron and Auger spectroscopy. These electrical properties lead to maximum power factor values of about 0.30 mW/K 2 .m at 650 ºC for the 4 wt.% Ag containing samples, which is among the best results obtained for this type of materials.

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Section: Resultssupporting

confidence: 75%