Accelerated melting annealing synthesis of high-performance filled skutterudite through repeated quenching
Source abstract
Abstract
The melt-annealing method is currently the main method for preparing the skutterudite materials and devices. However, its extensive utilization is impeded by a time-consuming annealing process. To address this issue, we have developed a melt-quenching-annealing-quenching procedure that significantly shortens the annealing time of Yb-filled CoSb 3 skutterudite to only 1 day. Our findings confirm that quenching after annealing effectively promotes the formation of CoSb 3 phase. Moreover, the reduced annealing time restricts grain growth. This outcome leads to a evident reduction in lattice thermal conductivity, taking into account the effect of the off-center Yb filler in voids distorting the crystal structure. Ultimately, a competitive zT of ∼1.25 is achieved at 823 K in Yb-filled CoSb 3. This work provides a guidance for the rapid preparation of skutterudite by melt-annealing.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Advanced Condensed Matter Physics · Heusler alloys: electronic and magnetic properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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