In:
Functional Materials Letters, World Scientific Pub Co Pte Ltd, Vol. 12, No. 01 ( 2019-02), p. 1850105-
Abstract:
A series of binary-doped CoSb 3 with Te and Se/Sn bulk compounds Co 4 Sb[Formula: see text]Te x Sn y /Se y ([Formula: see text] and 0.6, [Formula: see text] and 0.3), have been successfully prepared via a simple high pressure and high-temperature (HPHT) method. And, the influence of the doping elements on the microstructure of the samples synthesized under diverse pressures and the corresponding TE performance were studied in detail. Comparing with other preparation methods, the synthesis time of HPHT was acutely shortened. The obtained samples contain more grain boundaries, lattice disorder, dislocations and the possible “nanodot”, which have positive effect on reducing thermal conductivity. The experimental data indicate that the absolute values of Seebeck coefficient increases with pressure. What’s more, the thermal conductivities show a monotone decreasing trend as the synthesis pressure rises. The minimum value obtained is 1.93[Formula: see text] Wm[Formula: see text]K[Formula: see text] at normal temperature for Co 4 Sb[Formula: see text]Te[Formula: see text] Se[Formula: see text] prepared under 3[Formula: see text] GPa.
Type of Medium:
Online Resource
ISSN:
1793-6047
,
1793-7213
DOI:
10.1142/S1793604718501059
Language:
English
Publisher:
World Scientific Pub Co Pte Ltd
Publication Date:
2019
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