放电等离子烧结
材料科学
热电效应
塞贝克系数
微晶
球磨机
热导率
电阻率和电导率
复合材料
热电材料
烧结
冶金
热力学
电气工程
物理
工程类
作者
Fu Li,Jing‐Feng Li,Li‐Dong Zhao,Kai Xiang,Yong Liu,Bo-Ping Zhang,Yuanhua Lin,Ce‐Wen Nan,Hong-min Zhu
摘要
This work revealed that BiCuSeO oxyselenide is a potential oxide-based thermoelectric material, whose dimensionless figure of merit (ZT) reaches ∼0.70 at 773 K. High phase-purity BiCuSeO polycrystalline materials with fine grains were synthesized by a facile method combining a solid-state reaction and spark plasma sintering. Purifying the constitutive phase and reducing the grain sizes by introducing a high-energy ball milling process before spark plasma sintering were found to be effective in property enhancement. The resultant single-phased BiCuSeO sample derived from ball-milled powders shows good electrical conductivity above 4.0 × 103 S m−1 and a large Seebeck coefficient above 200 μV K−1. This compound has a low thermal conductivity (∼0.5 W m−1 K−1), which is associated with its low phonon transport speed and Young's modulus. Results indicated that BiCuSeO-based materials are promising for energy conversion applications in the moderate temperature range.
科研通智能强力驱动
Strongly Powered by AbleSci AI