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Enhanced high temperature thermoelectric characteristics of transition metals doped Ca3Co4O9+delta by cold high-pressure fabrication
Wang, Yang1; Sui, Yu1,2; Wang, Xianjie1; Su, Wenhui1; Liu, Xiaoyang3
Corresponding AuthorSui, Yu(suiyu@hit.edu.cn)
2010-02-01
Source PublicationJOURNAL OF APPLIED PHYSICS
ISSN0021-8979
Volume107Issue:3Pages:9
AbstractA series of Fe, Mn, and Cu doped Ca3Co4O9+delta samples, Ca-3(Co,M)(4)O9+delta (M=Fe, Mn, and Cu), were fabricated by cold high-pressure compacting technique. Their thermoelectric properties were investigated from room temperature up to 1000 K. The cold high-pressure compacting method is advantageous to increasing density and texture, in favor of the improvement of thermoelectric performance. The electrical transport measurements indicate that Fe/Mn substitutes for Co mainly in [CoO2] layers whereas the substitution of Cu for Co takes place in [Ca2CoO3] layers. The thermoelectric properties as well as electronic correlations depend not only on the substitution ion but also the Co site that is replaced. Thermopower can be well calculated by the carrier effective mass according to Boltzmann transport model, indicating that the electronic correlation plays a crucial role in the unusual thermoelectric characteristics of this system. From the changes in thermopower, resistivity, and thermal conductivity, thermoelectric performance of Ca3Co4O9+delta is efficiently improved by these transition metals doping. Fe doped samples possess the highest ZT values. Combining cold high-pressure technique, ZT of Ca3Co3.9Fe0.1O9+delta can reach similar to 0.4 at 1000 K, which is quite large among ceramic oxides, suggesting that Fe doped Ca3Co4O9+delta could be a promising candidate for thermoelectric applications at elevated temperatures.
KeywordBoltzmann equation calcium compounds compaction copper density doping high-pressure techniques iron manganese texture thermoelectric power
Funding OrganizationNational Natural Science Foundation of China ; Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
DOI10.1063/1.3291125
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[50672019] ; National Natural Science Foundation of China[10804024] ; Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
WOS Research AreaPhysics
WOS SubjectPhysics, Applied
WOS IDWOS:000274517300052
PublisherAMER INST PHYSICS
Citation statistics
Cited Times:85[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/101399
Collection中国科学院金属研究所
Corresponding AuthorSui, Yu
Affiliation1.Harbin Inst Technol, CCMST, Dept Phys, Harbin 150001, Peoples R China
2.Acad Sinica, Int Ctr Mat Phys, Shenyang 110015, Peoples R China
3.Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China
Recommended Citation
GB/T 7714
Wang, Yang,Sui, Yu,Wang, Xianjie,et al. Enhanced high temperature thermoelectric characteristics of transition metals doped Ca3Co4O9+delta by cold high-pressure fabrication[J]. JOURNAL OF APPLIED PHYSICS,2010,107(3):9.
APA Wang, Yang,Sui, Yu,Wang, Xianjie,Su, Wenhui,&Liu, Xiaoyang.(2010).Enhanced high temperature thermoelectric characteristics of transition metals doped Ca3Co4O9+delta by cold high-pressure fabrication.JOURNAL OF APPLIED PHYSICS,107(3),9.
MLA Wang, Yang,et al."Enhanced high temperature thermoelectric characteristics of transition metals doped Ca3Co4O9+delta by cold high-pressure fabrication".JOURNAL OF APPLIED PHYSICS 107.3(2010):9.
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