| Autor: |
Chernyshova, E. V., Kolesnikov, E. A., Bochkanov, F. Yu., Argunov, E. V., Voronin, A. I., Khovaylo, V. V. |
| Zdroj: |
Nanobiotechnology Reports; April 2024, Vol. 19 Issue: 2 p213-218, 6p |
| Abstrakt: |
Abstract: In this work, a thermoelectric material with the nominal composition Zn0.97Al0.02Ni0.01O is synthesized using the chemical coprecipitation method. The synthesized powder consists of the main phase of wurtzite with a small content of Ni1–zZnzO; the change in the crystal-lattice parameters of the main phase indicates the replacement of Zn2+with Al3+. The Ni1–zZnzO phase is predominantly located at the grain boundaries, blocking their growth during spark-plasma sintering. The resulting morphology enhances phonon scattering processes, which leads to a decrease in thermal conductivity. The electrical conductivity exhibits activation behavior and increases significantly in comparison with undoped ZnO, because the concentration of charge carriers increases with the substitution of Zn2+/Al3+. Thus, the chemical coprecipitation method allows one to obtain doped ZnO with an increase in thermoelectric performance of more than 2 times relative to undoped ZnO. |
| Databáze: |
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