High-temperature thermoelectric properties of Ca3Co4O9+δ with Eu substitution

被引：123

作者：

Wang, DL

Chen, LD ^{[1
]}

Yao, Q

Li, JG

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

[2] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200030, Peoples R China

来源：

SOLID STATE COMMUNICATIONS | 2004年 / 129卷 / 09期

关键词：

semiconductors; chemical synthesis; electric transport;

D O I：

10.1016/j.ssc.2003.11.045

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have prepared polycrystalline Ca3-xEuxCo4O9+delta (x = 0, 0.15, 0.3 and 0.45) samples using a sol-gel process followed by SPS sintering and investigated the Eu substitution effects on their high-temperature thermoelectric properties. With the Eu substitution. both the electrical resistivity and thermopower increase monotonously. This could be attributed to the decrease of hole concentrations by substitution of trivalent Eu3+ for divalent Ca2+. The Eu substituted samples (x = 0.15, x = 0.3) have lower thermal conductivity than Ca3Co4O9+delta due to their lower electronic and lattice thermal conductivity. The dimensionless figure of merit ZT reaches 0.3 at 1000 K for the sample of Ca2.7Eu0.3Co4O9+delta. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：615 / 618

页数：4

共 19 条

[1] An oxide single crystal with high thermoelectric performance in air [J].

Funahashi, R ;

Matsubara, I ;

Ikuta, H ;

Takeuchi, T ;

Mizutani, U ;

Sodeoka, S .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 2000, 39 (11B) :L1127-L1129

[2] Large thermopower in a metallic cobaltite:: The layered Tl-Sr-Co-O misfit -: art. no. 172101 [J].

Hébert, S ;

Lambert, S ;

Pelloquin, D ;

Maignan, A .

PHYSICAL REVIEW B, 2001, 64 (17)

[3] Thermoelectric properties of Bi2.3-xPbxSr2.6Co2Oy single crystals [J].

Itoh, T ;

Terasaki, I .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 2000, 39 (12A) :6658-6660

[4] Thermopower in cobalt oxides [J].

Koshibae, W ;

Tsutsui, K ;

Maekawa, S .

PHYSICAL REVIEW B, 2000, 62 (11) :6869-6872

[5] High temperature thermoelectric properties of oxide Ca9Co12O28 [J].

Li, SW ;

Funahashi, R ;

Matsubara, I ;

Ueno, K ;

Yamada, H .

JOURNAL OF MATERIALS CHEMISTRY, 1999, 9 (08) :1659-1660

[6] Misfit-layered cobaltite with an anisotropic giant magnetoresistance:: Ca3Co4O9 [J].

Masset, AC ;

Michel, C ;

Maignan, A ;

Hervieu, M ;

Toulemonde, O ;

Studer, F ;

Raveau, B ;

Hejtmanek, J .

PHYSICAL REVIEW B, 2000, 62 (01) :166-175

[7] Structure and thermoelectric transport properties of isoelectronically substituted (ZnO)5In2O3 [J].

Masuda, Y ;

Ohta, M ;

Seo, WS ;

Pitschke, W ;

Koumoto, K .

JOURNAL OF SOLID STATE CHEMISTRY, 2000, 150 (01) :221-227

[8] Photoemission and x-ray-absorption study of misfit-layered (Bi,Pb)-Sr-Co-O compounds: Electronic structure of a hole-doped Co-O triangular lattice [J].

Mizokawa, T ;

Tjeng, LH ;

Steeneken, PG ;

Brookes, NB ;

Tsukada, I ;

Yamamoto, T ;

Uchinokura, K .

PHYSICAL REVIEW B, 2001, 64 (11)

[9]

Nolas G. S., 2001, THERMOELECTRICS BASI

[10] ELECTRICAL-TRANSPORT PROPERTIES AND HIGH-TEMPERATURE THERMOELECTRIC PERFORMANCE OF (CA(0.9)M(0.1))MNO3 (M=Y,LA,CE,SM,IN,SN,SB,PB,BI) [J].

OHTAKI, M ;

KOGA, H ;

TOKUNAGA, T ;

EGUCHI, K ;

ARAI, H .

JOURNAL OF SOLID STATE CHEMISTRY, 1995, 120 (01) :105-111

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