Thermoelectric properties of Nb-doped (Nd0.55Li0.36)TiO3bulk ceramics with superlattice structure
Thermoelectric properties of Nb-doped (Nd0.55Li0.36)TiO3bulk ceramics with superlattice structure
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DOI：
10.1016/j.jallcom.2015.12.231
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发表时间：
2016-04
影响因子：
6.2
通讯作者：
Yaoshuai Ba;Yifeng Wang;C. Wan;W. Norimatsu;M. Kusunoki;Dechun Ba;K. Koumoto
中科院分区：
文献类型：
--
作者：
Yaoshuai Ba;Yifeng Wang;C. Wan;W. Norimatsu;M. Kusunoki;Dechun Ba;K. Koumoto
报道了用常规烧结法制备的Nb掺杂（Nd0.55Li0.36）TiO 3块体陶瓷的热电性能。在整个晶粒中观察到超晶格结构，并获得类似玻璃的热导率（1.2W/m·K）。Ti位Nb掺杂提高了（Nd0.55Li0.36）TiO 3的电学性能。Nb的低固溶度和TiO 6八面体的畸变影响了Nb掺杂（Nd 0. 55 Li 0. 36）TiO 3的电性能。含5at%Nb的样品在650 K时的ZT值最大，为0.05。这一工作对新型氧化物热电材料的设计具有一定的指导意义。
We report the thermoelectric properties of Nb-doped (Nd0.55Li0.36)TiO3bulk ceramics prepared by the conventional sintering method. Superlattice structure present throughout the crystalline grain was observed and a glass-like thermal conductivity (∼2 W/m·K) was obtained. The electrical properties of (Nd0.55Li0.36)TiO3were improved due to the Ti-site-Nb-doping. The low solid solubility of Nb and the distortion of TiO6octahedron impaired the electrical performance of Nb-doped (Nd0.55Li0.36)TiO3. The sample with 5 at%Nb gave the maximum ZT value of 0.05 at 650 K. This work is helpful for the design of novel oxide thermoelectric materials.