Microstructure and High-Temperature Thermoelectric Performance of InxCo4Sb12 Fabricated via Microwave Synthesis Combined with Spark Plasma Sintering

作者：Yong, Chao; Lei, Ying; Jiang, Xiaowu; Li, Yu^*; Qiu, Jin; Gao, Feng; Wang, Nan; Song, Guangyuan; Hu, Huaichuan

来源：Journal of Electronic Materials, 2023, 52(5): 2913-2918.

DOI：10.1007/s11664-023-10296-y

• In-filled CoSb3
• microwave heating
• microstructure
• electrical properties
• thermal properties

Indium-filled InxCo4Sb12 thermoelectric bulk ingots are fabricated via microwave synthesis combined with spark plasma sintering. All major x-ray diffraction peaks are indexed to the body-centered cubic CoSb3, and secondary phases are detected in different samples. Nano-sized CoSb2, incoherent grain boundary and dislocations are observed by scanning transmission electron microscopy (STEM). The carrier concentration of InxCo4Sb12 is 4.95 x 10(19)-2.91 x 10(20) cm(-3). Minimum lattice thermal conductivity of 1.63 Wm(-1) K-1 is achieved. In0.8Co4Sb12 shows a maximum ZT of 0.90 at 673 K.

• 单位
  贵州大学; y