- 著者
- Okamoto Norihiko L Fujimoto Shu Kambara Yuki Kawamura Marino Chen Zhenghao M T Matsunoshita Hirotaka Tanaka Katsushi Inui Haruyuki George Easo P
- 出版者
- Springer Nature
- 雑誌
- Scientific reports (ISSN:20452322)
- 巻号頁・発行日
- vol.6, 2016-10-24
- 被引用文献数
- 319
新しい構造材料「高エントロピー合金」の強度の実験的決定に成功. 京都大学プレスリリース. 2016-10-24.
- 著者
- Harada Shunta Tanaka Katsushi Inui Haruyuki
- 出版者
- AMER INST PHYSICS
- 雑誌
- JOURNAL OF APPLIED PHYSICS (ISSN:00218979)
- 巻号頁・発行日
- vol.108, no.8, 2010-10
- 被引用文献数
- 152
The thermoelectric properties of Magnèli phase titanium oxides TinO2n−1 n=2, 3, ... have been investigated, paying special attention to how the thermoelectric performance can be altered by changing the microstructure. Dense polycrystalline specimens with nominal composition of TiO2−x x=0.05, 0.10, 0.15, and 0.20 prepared by conventional hot-pressing are all identified to be one of the Magnèli phases, in which crystallographic shear planes are regularly introduced according to the oxygen deficiency. Electrical conduction is n-type for all specimens and the carrier concentration increases with the increase in the oxygen deficiency. The values of lattice thermal conductivity, on the other hand, decrease with the increase in the oxygen deficiency, which can be attributed to phonon scattering at the crystallographic shear plane. The largest value of thermoelectric figure of merit Z, 1.6 10−4 K−1 was obtained at 773 K for the hot-pressed specimen of TiO1.90