Adv. Search
Journal of Inorganic Materials

Journal of Inorganic Materials >

2010 , Vol. 25 >Issue 6: 621 - 625

DOI: https://doi.org/10.3724/SP.J.1077.2010.00621

Research Paper

Influence of Microstructure on the Electrical Properties of Bi2Sr2Co2Oy Compound

  • GAO Wen-Bin ,
  • ZHANG Li ,
  • TANG Xin-Feng
Expand
  • (State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology,   Wuhan 430070, China)

Received date: 2009-06-24

  Revised date: 2009-10-27

  Online published: 2010-05-12

Fold

Abstract

Single phase Bi2Sr2Co2Oy compound was synthesized by Sol-Gel method, using PEG20000 and ultrasonic treatment to optimize microstructure of powders, and bulk materials were gained after SPS technique. The influence of microstructure on electrical properties of Bi2Sr2Co2Oy compound was investigated. The results show that adding of PEG20000 and ultrasonic treatment can decrease the size of powders obviously, the grain size of bulk materials decreases greatly, so the electrical properties of material increased. Bulk materials synthesized from the powders prepared with adding PEG20000 and ultrasonic treatment gain the highest ZT value of 0.041 at 873K.

Key words： Bi2Sr2Co2Oy; PEG; ultrasonic; electrical properties

Cite this article

GAO Wen-Bin , ZHANG Li , TANG Xin-Feng . Influence of Microstructure on the Electrical Properties of Bi2Sr2Co2Oy Compound[J]. Journal of Inorganic Materials, 2010 , 25(6) : 621 -625 . DOI: 10.3724/SP.J.1077.2010.00621

References

[1]Terasaki I, Sasago Y, Uchinokura K. Larger thermoelectric power in NaCo2O4 single crystals. Phys. Rev. B: Condens Matter, 1997, 56(20): R12685-R12687.

[2]Lee Minhyea, Viciu Liliana, Li Lu, et al. Large enhancement of the thermopower in NaxCoO2 at high Na doping. Nature Materials, 2006, 5(7): 537-540.

[3]Ito Mikio, Furumoto Daisuke. Microstructure and thermoelectric properties of NaxCo2O4/Ag composite synthesized by the polymerized complex method. Journal of Alloys and Compounds, 2008, 450 (1/2): 517-520.

[4]Wang Dongli, Chen Lidong, Yao Qin. High-temperature thermoelectric properties of Ca3Co4O9+x with Eu substitution. Solid State Communications, 2004, 129 (9): 615-618.

[5]Wang Y, Rogado N S, Cava J R, et al. Spin entropy as the likely source of enhanced thermoelectric in NaxCo2O4. Nature, 2003, 423: 425-428.

[6]邢学玲, 闵新民．钴酸盐类氧化物热电材料的研究进展．材料导报, 2006, 20(2): 47-53

[7]Funahashi Ryoji, Shikano Masahiro. Bi2Sr2Co2Oy whiskers with high thermoelectric figure of merit. Appl. Phys. Lett., 2002, 81(8): 1459-1461.

[8]Funahashi Ryoji, Matsubara Ichiro, Sodeoka Satoshi. Thermoelectric properties of Bi2Sr2Co2Ox polycrystalline materials. Appl. Phys. Lett., 2000, 76(17): 2385-2387.

[9]包 南, 孙 剑, 谢 晴, 等. PEG辅助纳米TiO2的可控制备及其光催化活性.传感技术学报,2006, 19(5):2354-2358

[10]应皆荣, 万春荣, 姜长印, 等. 聚乙二醇对无机盐的胶束增溶作用及在溶胶配制中的应用. 功能材料, 2001, 32(2): 118-120.

[11]王俊中, 胡 源, 陈祖耀(WANG Jun-Zhong, et al). 超声化学制备纳米材料的研究进展. 稀有金属材料与工程(Rare Metal Mat. Eng.), 2003, 32(8): 585-590.
Options
Outlines

/

〈 〉