Yu. I. Shtern, M. S. Rogachev, M. Yu. Shtern, A. A. Sherchenkov, N. Yu. Tabachkova, B. R. Mustafoev
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Study of the Temperature Dependences of the Thermal Expansion Coefficients of Thermoelectric Materials Based on SiGe
The work presents studies of the temperature dependences of the coefficients of linear thermal expansion (CLTE) of effective thermoelectric materials Si0.8Ge0.2 (1.8 wt % P) and Si0.8Ge0.2 (0.8 wt % B), which are synthesized by induction melting, and nanostructured thermoelectric materials obtained by spark plasma sintering. The density of the nanostructured thermoelectric materials (2.94 g/cm3) is 98% of the density of the synthesized thermoelectric materials (2.99 g/cm3). The synthesized and nanostructured thermoelectric materials have similar Vickers microhardness values of ~1100 HV. The CLTE value of the nanostructured thermoelectric materials is 2–3% higher than that of the synthesized thermoelectric materials. The temperature dependences of the CLTE are similar in nature and are within the range of 3.84 × 10–6 up to 4.71 × 10–6 K–1. For n- and p-type SiGe, the values of the CLTE are almost identical.
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Nanobiotechnology Reports publishes interdisciplinary research articles on fundamental aspects of the structure and properties of nanoscale objects and nanomaterials, polymeric and bioorganic molecules, and supramolecular and biohybrid complexes, as well as articles that discuss technologies for their preparation and processing, and practical implementation of products, devices, and nature-like systems based on them. The journal publishes original articles and reviews that meet the highest scientific quality standards in the following areas of science and technology studies: self-organizing structures and nanoassemblies; nanostructures, including nanotubes; functional and structural nanomaterials; polymeric, bioorganic, and hybrid nanomaterials; devices and products based on nanomaterials and nanotechnology; nanobiology and genetics, and omics technologies; nanobiomedicine and nanopharmaceutics; nanoelectronics and neuromorphic computing systems; neurocognitive systems and technologies; nanophotonics; natural science methods in a study of cultural heritage items; metrology, standardization, and monitoring in nanotechnology.
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