Thermoelectric properties and phase stability of La10S14O
Thermoelectric properties and phase stability of La10S14O
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La10S14O的热电性能和相稳定性
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
H. Asahi
中科院分区：
文献类型：
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作者：
M. Ohta;S. Hirai;H. Kato;H. Asahi
测量了四方相La10S14O的电阻率、热电势、热导率。在300 K和1000 K连续冷却和加热过程中，测量了样品的电阻率，以研究其高温相稳定性。测量是在真空室中进行的，真空室的气压降至1.0Pa.热处理使La10S14O的电学性能发生了显著变化。随着退火时间的延长，样品的电阻率先急剧增大，然后逐渐减小。然而，这一相似乎可以通过少量的添加钛来稳定。在含钛La10S14O的电阻率范围内，冷却曲线与加热曲线一致。此外，ZT值随着温度的升高而急剧增加，在1000K时达到0.18。添加少量的钛可以改善La10S14O的热电性能。
The electrical resistivity, thermopower, thermal conductivity measurements have been made on tetragonal La10S14O. The electrical resistivity was measured during heating and successive cooling through 300 and 1000 K to investigate the high-temperature phase stability. The measurements were carried out in the vacuum chamber pumped down to 1.0 Pa. The electrical properties of La10S14O are changed dramatically through heat treatment. As annealing time increases, the electrical resistivity increases abruptly and then decreases gradually. However, it seems that this phase can be stabilized by a small addition of Ti. In the electrical resistivity of La10S14O with Ti, the cooling curve agrees with heating curve. Moreover, the ZT value increases abruptly with increasing temperature, reaching a value of 0.18 at 1000 K. The improvement with respect to the thermoelectric properties of the La10S14O is realized by a small addition of Ti.
影响因子：
6.2
作者：
M. Ohta;S. Hirai;S. Morita;T. Nishimura;Y. Uemura
通讯作者：
M. Ohta;S. Hirai;S. Morita;T. Nishimura;Y. Uemura
不同氧、碳杂质含量的Ln_2S_3(Ln=La,Sm)的相变及显微结构
DOI：
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发表时间：
2006
期刊：
Journal of Alloys and Compounds 408-412
影响因子：
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作者：
M.Ohta;S.Hirai;Z.Ma;T.Nishimura;Y.Uemura;K.Shimakage
通讯作者：
K.Shimakage