Improvement in the thermoelectric properties of CaMnO3 perovskites by W doping
Source abstract
Abstract
Perovskite manganites CaMn1−y W y O3 (0 ≤ y ≤ 0.05) were synthesized using solid-state reaction technique. The influence of W doping on the structure, charge carrier transports and phonon scattering of CaMnO3 was investigated. Doping was found to increase the carrier concentration, leading to enhanced electrical conductivity and decreased Seebeck coefficient. In addition, it decreased the thermal conductivity of CaMnO3, which was believed to associate with decreased phonon mean path and doping-induced MnO6 octahedral distortion, as evidenced by the increased orthorhombicity. A twofold increase of figure of merit (ZT) of 0.15 at 973 K was observed in CaMn0.99W0.01O3, compared with the undoped CaMnO3.
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Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Magnetic and transport properties of perovskites and related materials · Thermal Expansion and Ionic Conductivity
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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