Eutectic microstructures and thermoelectric properties of MnTe-rich precipitates hardened PbTe
Source abstract
Abstract
Abstract Eutectic microcosmic characteristics, mechanical and thermoelectric properties are studied in Pb1−xMnxTe beyond the Mn solubility limit. Particle-like MnTe2 and lamellar MnTe precipitates are spontaneously formed, presumably due to the precipitate-matrix lattice misfit. MnTe-rich precipitates in PbTe can improve the mechanical properties without significant impact on the thermoelectric performance. Band degeneracy effect and additional phonon scattering by discontinued particle-like precipitates prompt a high figure of merit ZT of 1.5 in Pb0.94Mn0.06Te. Though continuum ordered lamellar precipitates lead to larger electrical resistivity and anomalous increase of lattice thermal conductivity, the average ZT (≈0.8) in Pb1−xMnxTe (0.12 ≤ x ≤ 0.36) is still comparable with PbTe (all doped by 2% Na). Such precipitation hardening by eutectic microstructures without strongly influencing the thermoelectric performance can be promising for thermoelectric applications.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Thermal properties of materials · Thermal Radiation and Cooling Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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