Highly enhanced thermoelectric and mechanical performance of copper sulfides via natural mineral in-situ phase separation
Source abstract
Abstract
The precipitates of in-situ phase separation play an important role in enhancing the thermoelectric properties of copper sulfides by suppressing phonon transmission. In this study, Cu1.8S composites were fabricated by melting reaction and spark plasma sintering. The complex structures, micron-PbS, Sb2S3, nano-FeS and multiscale pores, originate from the introduction of FePb4Sb6S14 into the Cu1.8S matrix. Using effective element (Fe) doping and multiscale precipitates, the Cu1.8S+0.5 wt.% FePb4Sb6S14 bulk composite reached a high ZT value of 1.1 at 773 K. Furthermore, the modulus obtained for this sample was approximately about 40.27 Gpa, which was higher than of the pristine sample. This study provides a novel strategy for realizing heterovalent doping while forming various precipitates via in-situ phase separation by the natural minerals, which has been proven to be effective in improving the thermoelectric and mechanical performance of copper sulfides and is worth promoting in other thermoelectric systems.
Source: openalex_inverted_index · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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