采用固相反应法制备了Na0.7CoO2和Na0.7Co1-xFexO2（x=0.03,0.07,0.10）。X射线衍射显示Fe部分取代Co掺入了Na0.7CoO2的晶格中,Fe的掺入使晶胞参数c变大。电学性能测试表明,Fe的掺杂使电导率σ随温度的变化趋势发生了改变,并且使电导率降低。Fe的掺杂使Seebeck系数α有一定的提高,但其变化幅度较电导率低。功率因子α2σ的计算结果表明Fe的掺杂引起了材料功率因子的降低。
Na0.7CoO2 and Na0.7Co1-xFexO2（x=0.03,0.07,0.10） were synthesized by solid state reaction method.The X-ray diffractometry（XRD） results showed that Fe could be partially substituted for Co in the Na0.7CoO2 lattice.The lattice parameter c increased with doping Fe.The electric property test showed that the electrical conductivity,σ,obviously decreased for the reason of Fe substitution.The Seebeck coefficient,α,increased with doping Fe,which can be attributed to the increase of the specific heat,Ce.The degree of the increase of Seebeck coefficient was less than that of the decrease of the electrical conductivity,so that,Fe doping led to a decrease in the power factor,α2σ.
参考文献
| [1] | BHANDARI C M;ROE D M.CRC handbook of thermoeleetrics[M].Boca Raton:crc Press,1995:43-49. |
| [2] | Strobel, P;Muguerra, H;Hebert, S;Pachoud, E;Colin, C;Julien, MH .Effect of ruthenium substitution in layered sodium cobaltate NaxCoO2: Synthesis, structural and physical properties[J].Journal of Solid State Chemistry,2009(7):1872-1878. |
| [3] | Lei Wang;Ming Wang;Dongliang Zhao .Thermoelectric properties of c-axis oriented Ni-substituted NaCoO_2 thermoelectric oxide by the citric acid complex method[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2009(1/2):519-523. |
| [4] | Terasaki;Tsukada;Iguchi .Impurity-induced transition and impurity-enhanced thermopower in the thermoelectric oxide NaCo2-xCuxO4[J].Physical Review B,2003,65(19):195106-1951-7. |
| [5] | K. Park;U. Jang;H.-C. Kwon .Influence of partial substitution of Cu for Co on the thermoelectric properties of NaCo_2O_4[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2006(1/2):213-219. |
| [6] | 厉英,张丽华,姜茂发.（Na1-yMy）1.6 Co2O4（M=K,Ca,Sr）的制备及电学性能[J].中国有色金属学报,2006(01):142-146. |
| [7] | Mrotzek A;Miiller E;Plewa J.Influence of partial substitution of Co by Pb on the microstructure and thermoelectric properties of Na xCo1-yPbyO2[A].Beijing:IEEE,2003:219-222. |
| [8] | Tomoya N;Mikio I;Shigeru K et al.Thermoelectric properties of (Na1-y My)x Co2O4 (M = K,Sr,Y,Nd,Sm and Yb;y =0101(0135)[J].Journal of Alloys and Compounds,2003,348(1-2):263-269. |
| [9] | Itoh T;Kawata T;Kitajima T.Transport properties in (Na,Ca)xCo2O4 ceramice[A].Nagoya:IEEE,1998:595-597. |
| [10] | Yakabe H;Fujita K;Nakamura K.Thermoelectric properties of NaxCoO2-δ(x= 0. 5) system; focusing on partially substituting effeets[A].Nagoya:IEEE,1998:551-558. |
| [11] | Molenda J;Delmas C;Hagenmller P .Electric and electrochemical properties of NaCoO2 cathode[J].Solid-State Ionicis,1983,9-10(01):431-435. |
| [12] | Yakabe H;Fujita K;Nakamura K.Thermoelectric performance of NaxCoO2-δ(x = 0. 5 ) system, Focusing on partially Substituting Effects[A].Nagoya,Japan,1998:551. |
| [13] | Yasuhiro O;Ryuji I;Yuzuru M et al.Crystal structure,electric and magnetic Properties of layered cobaltite β-NaxCoO2[J].Journal of Solid State Chemistry,2002,166(04):177-181. |
| [14] | H. X. Yang;Y. Xia;Y. G. Shi et al.Raman spectroscopy study of α-,α-,γ-NaxCoO2 and γ-(Ca, St)x CoO2[J].Physical Review B,2006,74(09):094301-0941-6. |
| [15] | Terasaki I.;Uchinokura K.;Sasago Y. .LARGE THERMOELECTRIC POWER IN NACO2O4 SINGLE CRYSTALS[J].Physical Review.B.Condensed Matter,1997(20):12685-12687. |
| [16] | Gayathri N;Bharathi A;Sastry VS;Sundar CS;Hariharan Y .Ground state changes induced by Ni substitution in NaxCoO2[J].Solid State Communications,2006(10/11):489-493. |
| [17] | W Y Zhang;H C Yu;Y G Zhao et al.The metal-insulator transition in the strongly correlated layered compound NaxCoO2 induced by dilute Mn doping[J].Journal of Physics: Condensed Matter,2004,16(28):4935-4940. |
| [18] | Zaiqing Zhang;Jincang Zhang;Yan Xu et al.Low-temperature resistivity minimum in dilute Mn-doping Na0.7 Co1-x MnxO2: A Kondo-like oxide with strong disorder charaeteristics[J].Physical Review B,2006,74(04):045108-0451-6. |
| [19] | Wang HD;Yang JH;Li Q;Xu Z;Fang MH .Metal-insulator transition in Na0.75Co1-xRuxO2[J].Physica, B. Condensed Matter,2009(1):52-54. |
| [20] | Guo ZP;Zhao YG;Zhang WY;Cui L;Guo SM;Luo LB .Effect of Ga and Mn doping on structural, electrical transport and magnetic properties of Na0.75CoO2[J].Journal of Physics. Condensed Matter,2006(17):4381-4388. |
| [21] | Xu GJ.;Funahashi R.;Shikano M.;Pu QR.;Liu B. .High temperature transport properties of Ca3-xNaxCo4O9 system[J].Solid State Communications,2002(3):73-76. |
| [22] | B. Fisher;L. Patlagan;G. M. Reisner et al.Systematics in the thermopower of electron-doped layered manganites[J].Physical Review B,2000,61(01):470-475. |
| [23] | Ken Kurosaki;Hiroaki Muta;Masayoshi Uno .Thermoelectric properties of NaCo_2O_4[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2001(1/2):234-236. |
| [24] | Lee M;Viciu L;Li L;Wang YY;Foo ML;Watauchi S;Pascal RA;Cava RJ;Ong NP .Large enhancement of the thermopower in NaxCoO2 at high Na doping[J].Nature materials,2006(7):537-540. |
| [25] | J. W. Lynn;Q. Huang;C. M. Brown et al.Structure and dynamics of superconducting NaxCoO2 hydrate and its unhydrated analog[J].Physical Review B,2003,68(21):214516-2141-7. |
| [26] | Tanaka A;Hu X .Possible spin triplet superconductivity in NaxCoO2 center dot yHzO[J].Physical Review Letters,2003,91(25):257006-2571-4. |
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%