Enhanced high temperature thermoelectric characteristics of transition metals doped Ca(3)Co(4)O(9+delta) by cold high-pressure fabrication

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	Enhanced high temperature thermoelectric characteristics of transition metals doped Ca(3)Co(4)O(9+delta) by cold high-pressure fabrication
	Y. Wang; Y. Sui; X. J. Wang; W. H. Su; X. Y. Liu
	2010
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	107 期号:3
摘要	A series of Fe, Mn, and Cu doped Ca(3)Co(4)O(9+delta) samples, Ca(3)(Co,M)(4)O(9+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 [CoO(2)] layers whereas the substitution of Cu for Co takes place in [Ca(2)CoO(3)] 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 Ca(3)Co(4)O(9+delta) is efficiently improved by these transition metals doping. Fe doped samples possess the highest ZT values. Combining cold high-pressure technique, ZT of Ca(3)Co(3.9)Fe(0.1)O(9+delta) can reach similar to 0.4 at 1000 K, which is quite large among ceramic oxides, suggesting that Fe doped Ca(3)Co(4)O(9+delta) could be a promising candidate for thermoelectric applications at elevated temperatures.
部门归属	[wang, yang; sui, yu; wang, xianjie; su, wenhui] harbin inst technol, ccmst, dept phys, harbin 150001, peoples r china. [sui, yu] acad sinica, int ctr mat phys, shenyang 110015, peoples r china. [liu, xiaoyang] jilin univ, coll chem, state key lab inorgan synth & preparat chem, changchun 130012, peoples r china.;sui, y (reprint author), harbin inst technol, ccmst, dept phys, harbin 150001, peoples r china;suiyu@hit.edu.cn
关键词	Boltzmann Equation Calcium Compounds Compaction Copper Density Doping High-pressure Techniques Iron Manganese Texture Thermoelectric Power Transport-properties Single-crystal Performance Thermopower Na Substitution Resistivity Antimonides Electron Behavior
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31542
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Wang,Y. Sui,X. J. Wang,et al. Enhanced high temperature thermoelectric characteristics of transition metals doped Ca(3)Co(4)O(9+delta) by cold high-pressure fabrication[J]. Journal of Applied Physics,2010,107(3).
APA	Y. Wang,Y. Sui,X. J. Wang,W. H. Su,&X. Y. Liu.(2010).Enhanced high temperature thermoelectric characteristics of transition metals doped Ca(3)Co(4)O(9+delta) by cold high-pressure fabrication.Journal of Applied Physics,107(3).
MLA	Y. Wang,et al."Enhanced high temperature thermoelectric characteristics of transition metals doped Ca(3)Co(4)O(9+delta) by cold high-pressure fabrication".Journal of Applied Physics 107.3(2010).