TY - GEN
T1 - High-temperature thermoelectric behaviors of highly dense polycrystalline nonstoichiometry titanium oxide ceramics
AU - Liu, Yong
AU - Lan, Jinle
AU - Zhang, Bo Ping
AU - Zhu, Hongmin
PY - 2010/5/21
Y1 - 2010/5/21
N2 - Polycrystalline nonstoichometry titanium oxide, TiOx(x=1.6-1.9) ceramics with high density were prepared by a spark plasma sintering process at 1373 K using TiO2 and TiO as starting materials. The temperature dependences of the electrical conductivity, Seebeck coefficient, and power factor have been investigated. The results indicate that the electrical conductivity of all the samples is in the range of a semiconductor (51 S cm -1∼360 S cm-1), increases with temperature increasing, and decreases with oxygen content increasing. All samples show high negative Seebeck coefficients (-50∼-375 μVK-1), reveals that the primary carriers are electrons. Power factor of all samples increased with temperature increasing. The maximum power factor value of 5×10 -4 Wm-1K-2 has been obtained in TiO 1.6 ceramic at 873K, indicating the titanium oxide system could be a promising candidate for high-temperature thermoelectric application.
AB - Polycrystalline nonstoichometry titanium oxide, TiOx(x=1.6-1.9) ceramics with high density were prepared by a spark plasma sintering process at 1373 K using TiO2 and TiO as starting materials. The temperature dependences of the electrical conductivity, Seebeck coefficient, and power factor have been investigated. The results indicate that the electrical conductivity of all the samples is in the range of a semiconductor (51 S cm -1∼360 S cm-1), increases with temperature increasing, and decreases with oxygen content increasing. All samples show high negative Seebeck coefficients (-50∼-375 μVK-1), reveals that the primary carriers are electrons. Power factor of all samples increased with temperature increasing. The maximum power factor value of 5×10 -4 Wm-1K-2 has been obtained in TiO 1.6 ceramic at 873K, indicating the titanium oxide system could be a promising candidate for high-temperature thermoelectric application.
KW - Power factor
KW - Thermoelectric
KW - Titanium oxide seebeck coefficient
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M3 - Conference contribution
AN - SCOPUS:77952354288
SN - 9780873397537
T3 - TMS Annual Meeting
SP - 9
EP - 15
BT - TMS 2010 - 139th Annual Meeting and Exhibition - Supplemental Proceedings
T2 - TMS 2010 - 139th Annual Meeting and Exhibition
Y2 - 14 February 2010 through 18 February 2010
ER -