High thermoelectric performance of type-III clathrate compounds of the Ba-Ge-Ga system

被引：60

作者：

Kim, Jung-Hwan ^{[1
]}

Okamoto, Norihiko L. ^{[1
]}

Kishida, Kyosuke ^{[1
]}

Tanaka, Katsushi ^{[1
]}

Inui, Haruyuki ^{[1
]}

机构：

[1] Kyoto Univ, Dept Mat Sci & Engn, Sakyo Ku, Kyoto 6068501, Japan

来源：

ACTA MATERIALIA | 2006年 / 54卷 / 08期

基金：

日本学术振兴会;

关键词：

thermoelectric; intermetallic compounds; microstructure; zintl concept;

D O I：

10.1016/j.actamat.2005.12.032

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The thermoelectric properties of type-III clathrate compounds, Ba24GaxGe100-x, have been investigated as a function of Ga content and temperature. The substitution of Ga atoms for Ge atoms leads to a decrease of carrier (electron) concentration. Electrical conduction is of n-type for all clathrate compounds investigated and the values of electrical resistivity and Seebeck coefficient increase with increasing Ga content and temperature. Both electronic and lattice thermal conductivities decrease with an increase in Ga content because of the decreased carrier concentration and the increased extent of the rattling motion of Ba atoms encapsulated in open dodecahedrons, respectively. A very high thermoelectric figure of merit (ZT) value of 1.25 is obtained at 670 degrees C when X = 15. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：2057 / 2062

页数：6

共 17 条

[1] Thermoelectric properties of Ba8GaxGe46-x clathrate compounds
Anno, H
Hokazono, M
Kawamura, M
Nagao, J
Matsubara, K
[J]. XXI INTERNATIONAL CONFERENCE ON THERMOELECTRICS, PROCEEDINGS ICT '02, 2002, : 77 - 80
[2] Carrillo-Cabrera W, 2000, Z KRIST-NEW CRYST ST, V215, P207
[3] AII(8)BIII(16)BIV(30) COMPOUNDS (AII = SR, BA - BIII = AL, GA - BIV = SI, GE, SN) AND THEIR CAGE STRUCTURES
EISENMANN, B
SCHAFER, H
ZAGLER, R
[J]. JOURNAL OF THE LESS-COMMON METALS, 1986, 118 (01): : 43 - 55
[4] Preparation and structure of a new germanium clathrate, Ba24Ge100
Fukuoka, H
Iwai, K
Yamanaka, S
Abe, H
Yoza, K
Häming, L
[J]. JOURNAL OF SOLID STATE CHEMISTRY, 2000, 151 (01) : 117 - 121
[5] Structure and thermoelectric properties of Ba6Ge25-x, Ba6Ge23Sn2, and Ba6Ge22In3:: Zintl phases with a chiral clathrate structure
Kim, SJ
Hu, SQ
Uher, C
Hogan, T
Huang, BQ
Corbett, JD
Kanatzidis, MG
[J]. JOURNAL OF SOLID STATE CHEMISTRY, 2000, 153 (02) : 321 - 329
[6] Preparation and thermoelectric properties of A8IIB16IIIB30IV clathrate compounds
Kuznetsov, VL
Kuznetsova, LA
Kaliazin, AE
Rowe, DM
[J]. JOURNAL OF APPLIED PHYSICS, 2000, 87 (11) : 7871 - 7875
[7] Wiedemann-Franz law at boundaries
Mahan, GD
Bartkowiak, M
[J]. APPLIED PHYSICS LETTERS, 1999, 74 (07) : 953 - 954
[8] Threefold enhancement of the thermoelectric figure of merit for pressure tuned Sr8Ga16Ge30
Meng, JF
Shekar, NVC
Badding, JV
Nolas, GS
[J]. JOURNAL OF APPLIED PHYSICS, 2001, 89 (03) : 1730 - 1733
[9] Nolas G. S., 2001, THERMOELECTRICS BASI
[10] Semiconducting Ge clathrates: Promising candidates for thermoelectric applications
Nolas, GS
Cohn, JL
Slack, GA
Schujman, SB
[J]. APPLIED PHYSICS LETTERS, 1998, 73 (02) : 178 - 180

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