Title :
Fabrication and thermoelectric properties of NaCo2O4 crystal
Author :
Mikami, M. ; Ohtuka, S. ; Yoshimura, M. ; Mori, Y. ; Sasaki, T. ; Funahashi, R. ; Matsubara, I.
Author_Institution :
Dept. of Electr. Eng., Osaka Univ., Japan
Abstract :
Large NaxCoO2 (x ⩽ 1) crystals that were thin along the c-axis were grown by a flux method. X-ray diffraction measurement showed that the crystals grown were NaCo2O4 (γ phase) and NaxCoO2 (x=1, 0.75; α, α´ phase). The largest NaCo2O4 crystal obtained was 5x5x0.I min. We measured the in-plane thermoelectric properties of the NaCo2O4 crystals. The thermoelectric power increased with temperature and reached 100 μV/K at 450 K
Keywords :
crystal growth from solution; crystal structure; semiconductor growth; semiconductor materials; sodium compounds; thermoelectric power; 450 K; NaxCoO2; NaCo2O4; NaCo2O4 crystal; X-ray diffraction; c-axis; fabrication; flux method; in-plane thermoelectric properties; thermoelectric power; thermoelectric properties; Conducting materials; Crystalline materials; Crystals; Fabrication; Phase measurement; Semiconductor materials; Temperature; Thermal conductivity; Thermoelectricity; X-ray diffraction;
Conference_Titel :
Thermoelectrics, 2001. Proceedings ICT 2001. XX International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-7205-0
DOI :
10.1109/ICT.2001.979863
