Effect of Sr substitution for Ca on the Ca3Co4O9 thermoelectric properties
نویسندگان
چکیده
منابع مشابه
Ca-for-Sr substitution in the thermoelectric [(Sr,Ca)2(O,OH)2]q[CoO2] misfit-layered cobalt-oxide system
Calcium-for-strontium substituted samples of the misfit-layered cobalt-oxide system, [(Sr1 xCax)2 (O,OH)2]q[CoO2], were successfully synthesized up to x1⁄40.2 with a sample-encapsulation technique originally developed for the x1⁄40 end phase. While the x1⁄40 sample has a commensurate match between the two layer blocks (i.e. q1⁄40.5), isovalent Ca-for-Sr substitution induces latticemisfit (i.e. ...
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15 صفحه اولEffect of substrate on the atomic structure and physical properties of thermoelectric Ca3Co4O9 thin films
The incommensurately layered cobalt oxide Ca3Co4O9 exhibits an unusually high Seebeck coefficient as a polycrystalline bulk material, making it ideally suited for many high temperature thermoelectric applications. In this paper, we investigate properties of Ca3Co4O9 thin films grown on cubic perovskite SrTiO3, LaAlO3, and (La0.3Sr0.7)(Al0.65Ta0.35)O3 substrates and on hexagonal Al2O3 (sapphire)...
متن کاملLocal structure of thermoelectric Ca3Co4O9
We have combined temperature-dependent local structural measurements with first-principles densityfunctional calculations to develop a three-dimensional local structure model of the misfit system Ca2CoO3 CoO2 1.61 referred to as Ca3Co4O9 which has a rocksalt structure stacked incommensurately on a hexagonal CoO2 lattice. The local structural measurements reveal a low coordination of Co 2 -O bon...
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ژورنال
عنوان ژورنال: Journal of Alloys and Compounds
سال: 2013
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2013.07.005