High-temperature thermoelectric properties of Ca3-xPrxCo3.95Ga0.05O9+δ

被引：2

作者：

Bhaskar, Ankam ^{[1
]}

Jhang, C. -S. ^{[1
]}

Liu, Chia-Jyi ^{[1
]}

Hsieh, Huey-Lin ^{[2
]}

Huang, Jing-Yi ^{[2
]}

机构：

[1] Natl Changhua Univ Educ, Dept Phys, Changhua 500, Taiwan

[2] China Steel Corp, New Mat Res & Dev Dept, Kaohsiung 81233, Taiwan

来源：

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2013年 / 24卷 / 12期

关键词：

OXYGEN NONSTOICHIOMETRY; LAYERED COBALTITE; CA3CO4O9; THERMOPOWER; TRANSPORT; FE; CO;

D O I：

10.1007/s10854-013-1488-4

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Ca3Co4O9+delta and Ca3-xPrxCo3.95Ga0.05O9+delta (x = 0.02, 0.05 and 0.10) samples were prepared by conventional solid-state synthesis. The thermoelectric (TE) properties were measured at 300-750 K. The XRD patterns revealed that all the samples are single phase. The thermopower of all the samples was positive, indicating that the predominant carriers are holes over the entire temperature range. The power factor of Ca2.9Pr0.10Co3.95Ga0.05O9+delta was improved about 52.6 % compared to Ca3Co4O9+delta at 300 K. Ca2.9Pr0.10Co3.95Ga0.05O9+delta had the highest dimensionless figure of merit of 0.030 at 300 K, representing an improvement of about 50 % compared to Ca3Co4O9+delta. These results indicate that partial substitution of Pr3+ ion improves the TE properties of Ca3Co4O9+delta.

引用

页码：4857 / 4861

页数：5

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