Effects of Dy and Yb co-doping on thermoelectric properties of CaMnO3 ceramics
Source abstract
Abstract
Abstract Perovskite-type Ca 1−2 x Dy x Yb x MnO 3 (0≤ x ≤0.10) ceramics were synthesized by solid state reaction. Microstructures were characterized and thermoelectric properties were evaluated between 300 K and 1100 K. The samples obtained in this work have high relative densities with compact grains. The electrical resistivity shows a typical metallic conductivity behavior, and decreases with substitution. The Seebeck coefficients are negative, indicating n-type conduction, and the largest value is obtained −181 μV/K at x =0.02. The highest power factor 415 μW/(K 2 m) and the highest figure of merit 0.27 are both obtained for x =0.02 sample, and the ZT is about five times as much as un-doped CaMnO 3 sample.
Source: openaire · Quality: candidate unverified · Source record ↗
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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