Publications by authors named "Matthias Schrade"
Article Synopsis
- An all-oxide thermoelectric generator relies on a low electrical resistance at the p-n junction formed by p-type CaCoO and n-type CaMnO.
- Heat treatment at 900 °C for 10 hours leads to counter diffusion of cations and the formation of a CaCoMnO interlayer, as well as precipitation of Co-oxides.
- Density functional theory calculations confirm the variability of the Co/Mn ratio in the interlayer and suggest a homogeneity range for CaCoMnO with a low mixing energy.
Thermoelectric application of half-Heusler compounds suffers from their fairly high thermal conductivities. Insight into how effective various scattering mechanisms are in reducing the thermal conductivity of fabricated XNiSn compounds (X = Hf, Zr, Ti, and mixtures thereof) is therefore crucial. Here, we show that such insight can be obtained through a concerted theory-experiment comparison of how the lattice thermal conductivity κ (T) depends on temperature and crystallite size.
View Article and Find Full Text PDFAn apparatus for measuring the Seebeck coefficient and electrical conductivity is presented and characterized. The device can be used in a wide temperature range from room temperature to 1050 °C and in all common atmospheres, including oxidizing, reducing, humid, and inert. The apparatus is suitable for samples with different geometries (disk-, bar-shaped), allowing a complete thermoelectric characterization (including thermal conductivity) on a single sample.
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