Effect of Single Crystallization on Thermoelectric Performance Improvement of Ba8CuxSi46−x Clathrate

Zilong Zhang, Chiho Inoue, Masahide Yasuda, Yuichiro Magami, Makoto Arita, Shinji Munetoh

    Research output: Contribution to journalArticlepeer-review

    1 Citation (Scopus)

    Abstract

    The thermoelectric properties of single-crystalline and polycrystalline n-type Ba8CuxSi46−x type I clathrate were investigated and compared. Single-crystalline Ba8CuxSi46−x clathrate was synthesized by the Czochralski (CZ) method with a Cu content gradient, while spark plasma sintering (SPS) was used for the reorganization of polycrystalline materials. The same Cu content resulted in almost the same Seebeck coefficient in both single-crystalline and polycrystalline crystals, while the power factor (PF = S2/ ρ) of single-crystalline clathrate is twice that of polycrystalline clathrate. Thus, single crystallization is effective for the synthesis of high-efficiency thermoelectric materials in a type I Ba8CuxSi46−x clathrate ternary system.

    Original languageEnglish
    Pages (from-to)1146-1152
    Number of pages7
    JournalJournal of Electronic Materials
    Volume50
    Issue number3
    DOIs
    Publication statusPublished - Mar 2021

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Electrical and Electronic Engineering
    • Materials Chemistry

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