|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Alloys and Compounds for Thermoelectric and Solar Cell Applications X
||NOW ON-DEMAND ONLY - Improvement of Thermoelectric Figure of Merit of p-type BiSbTe Alloys through the Microstructure Controlling by Optimization of Initial Powder Size
||Babu Madavali, Pathan Sharief, Sungjae Jo, Gian Song, Soon-Jik Hong
|On-Site Speaker (Planned)
In this work, we have fabricated p-type Bi0.5Sb1.5Te3 alloys and, eminently improved the thermoelectric properties through the controlling microstructure via optimization of initial powder size using water atomization. For that, we have partitioned different powder sizes such as 32-75μm, 75-125μm, 125-200μm and <200μm for the present study, and consolidated using sintering. The grain sizes were increased with increasing powder size, which further severely affect the transport properties. The electrical conductivity was high for 125-200μm sample owing to their large grain size and it decreased with decreasing powder size samples corresponding to their decreasing grain size. As a sequence, the Seebeck coefficient was decreased with increasing particle size. Besides, thermal conductivity also increased with increasing particle size due to higher transportation of carriers and phonons. The maximum figure of merit, ZT of 1.257, 1.24 was obtained for the 75-125μm, and 125-200μm samples respectively due to their higher electric conductivity.
||Electronic Materials, Powder Materials, Characterization