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

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

doi:10.1007/s11664-020-08649-y

Effect of Single Crystallization on Thermoelectric Performance Improvement of Ba₈Cu_xSi_46−x Clathrate

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

Research output: Contribution to journal › Article › peer-review

Abstract

The thermoelectric properties of single-crystalline and polycrystalline n-type Ba₈Cu_xSi_46−x type I clathrate were investigated and compared. Single-crystalline Ba₈Cu_xSi_46−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 Ba₈Cu_xSi_46−x clathrate ternary system.

Original language	English
Pages (from-to)	1146-1152
Number of pages	7
Journal	Journal of Electronic Materials
Volume	50
Issue number	3
DOIs	https://doi.org/10.1007/s11664-020-08649-y
Publication status	Published - 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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10.1007/s11664-020-08649-y

Cite this

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title = "Effect of Single Crystallization on Thermoelectric Performance Improvement of Ba8CuxSi46−x Clathrate",

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.",

author = "Zilong Zhang and Chiho Inoue and Masahide Yasuda and Yuichiro Magami and Makoto Arita and Shinji Munetoh",

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T1 - Effect of Single Crystallization on Thermoelectric Performance Improvement of Ba8CuxSi46−x Clathrate

AU - Zhang, Zilong

AU - Inoue, Chiho

AU - Yasuda, Masahide

AU - Magami, Yuichiro

AU - Arita, Makoto

AU - Munetoh, Shinji

PY - 2021/3

Y1 - 2021/3

N2 - 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.

AB - 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.

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Effect of Single Crystallization on Thermoelectric Performance Improvement of Ba₈Cu_xSi_46−x Clathrate

Abstract

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