Thermoelectric Power in Nonstoichiometric Orthorhombic Titanium Oxides
Thermoelectric Power in Nonstoichiometric Orthorhombic Titanium Oxides
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DOI：
10.1111/j.1551-2916.2006.00979.x
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发表时间：
2006-07
影响因子：
3.9
通讯作者：
I. Tsuyumoto;Taisuke Hosono;Masataka Murata
中科院分区：
文献类型：
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作者：
I. Tsuyumoto;Taisuke Hosono;Masataka Murata
通过在950°C下在H2中还原非化学计量的正交钛氧化物（TiOx; x=1.86-1.94），发现其显示出大的热电功率。它们的Seebeck系数在-0.060 ~-0.518 mV/K范围内，并基于电子自旋熵是决定熵流的主要因素这一假设进行了理论讨论。TiO 1.94在70°C下的品质因数估计为0.195。非化学计量的正交相钛氧化物不含有害元素，是一种很有前途的热电材料。
Nonstoichiometric orthorhombic titanium oxides (TiOx; x=1.86–1.94) prepared by reducing the anatase titanium oxide in H2 at 950°C are found to show large thermoelectric power. Their Seebeck coefficients are in the range −0.060 to −0.518 mV/K, and theoretical discussions are made based on the assumption that the electronic spin entropy dominating the entropy current is a main factor of the thermoelectric power. The figure of merit for TiO1.94 at 70°C is estimated at 0.195. The nonstoichiometric orthorhombic titanium oxides, containing no hazardous elements, are promising materials for thermoelectric power generation.