采用溶胶-凝胶法,结合常压烧结工艺制备了Ca3-xSrxCo4O9(x=0～0.5)热电陶瓷材料,并对材料的热电性能进行了测试.结果表明,Sr掺杂对Ca3Co4O9基材料的热电性能有较大影响.随着掺杂量的增加,电导率逐渐增大,Seebeck系数略有减小.Sr掺杂能显著降低热导率,而且随着掺杂量的增加,热导率的下降幅度逐渐增大.Sr掺杂显著改善Ca3Co4O9材料的热电性能,当掺杂量为0.5时获得最佳热电性能,573 K时Z值达1.07× 10-4 K-1.
参考文献
| [1] | Terasaki I.;Uchinokura K.;Sasago Y. .LARGE THERMOELECTRIC POWER IN NACO2O4 SINGLE CRYSTALS[J].Physical Review.B.Condensed Matter,1997(20):12685-12687. |
| [2] | Terasaki I. .Transport properties and electronic states of the thermoelectric oxide NaCo2O4[J].Physica, B. Condensed Matter,2003(1/2):63-67. |
| [3] | Funahashi R.;Ikuta H.;Takeuchi T.;Mizutani U.;Sodeoka S.;Matsubara I. .An oxide single crystal with high thermoelectric performance in air[J].Japanese journal of applied physics,2000(11B):L1127-L1129. |
| [4] | Funahashi R.;Shikano M. .Bi2Sr2Co2Oy whiskers with high thermoelectric figure of merit[J].Applied physics letters,2002(8):1459-1461. |
| [5] | Tosawat Seetawan;Vittaya Amornkitbamrung;Thanusit Burinprakhon .Thermoelectric properties of Na_xCo_2O_4/Ag composites[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2006(1/2):293-297. |
| [6] | Terasaki I. .Transport properties and electronic states of the thermoelectric oxide NaCo2O4[J].Physica, B. Condensed Matter,2003(1/2):63-67. |
| [7] | Sugiyamaa J;Brewerb J H;Ansaldoc E J et al.μ+SR Studies on Thermoelectric Oxides[J].Physica B,2003,329-333:902-903. |
| [8] | Zhang Y F;Zhang J X;Lu Q M et al.Synthesis and Characterization of Nanoparticles by Citrate Sol-gel Method[J].Materials Letters,2006,60:2443-2446. |
| [9] | Venkatasubramanian R;Siivola E;Colpitts T et al.Thin-film Thermoelectric Devices with High Room-temperature Figures of Merit[J].Nature,2001,413:597-602. |
| [10] | Chong D Y;Hong T;Brazis P et al.A High-perfor-mance Thermoelectric Material for Low-temperature Applications[J].Science,2000,287:1024-1127. |
| [11] | Massaet A C;Micheli C;Maignan A et al.Miafit-layered Cobaltite with an Anisotropic Giant Magne-troesistance:Ca3 Co4 O9[J].Physical Review B,2000,62:166-175. |
| [12] | Miyazaki Y;Kudo K;Koshima M A et al.Low-temperature Thermelectric Properties ofthe Compo-site Crystal[Ca2CoO3.34]0.614[CoO2][J].Japanese Journal of Applied Physics,2000,39:531-535. |
| [13] | 刘恩科;朱秉升;罗晋生.半导体物理学[M].北京:电子工业出版社,2005:372-373. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%