Optimising the thermoelectric properties of Bi2Sr2Co2Oy using Ag substitution and Nano-SiC doping
2021
Abstract Bi2Sr2Co2Oy with excellent thermoelectric properties has received extensive attention from scientific researchers. In this study, Bi2Sr2Co2Oy ceramic samples were prepared using the solid-phase sintering method. By Ag + substitution for Bi3+, the hole concentration and electrical conductivity were optimised. On this basis, nano-SiC particles were introduced to increase grain boundaries, improve phonon scattering, reduce the mean free path of phonons, and reduce the lattice thermal conductivity. A sample with a nominal composition of Bi1.8Ag0.2Sr2Co2Oy + 0.025 wt% SiC had a maximum ZT value of 0.35 at 923 K, which was approximately 67 % higher than the ZT value of pure Bi2Sr2Co2Oy. These results confirmed that under the combined action of Ag substitution and SiC doping, the thermoelectric performance of Bi2Sr2Co2Oy was significantly improved.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
66
References
0
Citations
NaN
KQI