authors |
Zakharchuk, KV; Tobaldi, DM; Xiao, XX; Xie, WJ; Mikhalev, SM; Martins, JF; Frade, JR; Weidenkaff, A; Kovalevsky, AV |
nationality |
International |
journal |
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY |
author keywords |
Zinc oxide; Thermoelectric performance; Electrical properties; Thermal conductivity; Zirconium doping |
keywords |
AL-DOPED ZNO; ELECTRICAL-PROPERTIES; TRANSPORT-PROPERTIES; THIN-FILMS; POWER; MORPHOLOGY; CERAMICS; PROGRESS; LATTICE |
abstract |
This work aims to explore zirconium as a possible dopant to promote thermoelectric performance in bulk ZnO-based materials, both within the single-doping concept and on simultaneous co-doping with aluminum. At 1100-1223 K mixed-doped samples demonstrated around similar to 2.3 times increase in ZT as compared to single-doped materials, reaching similar to 0.12. The simultaneous presence of aluminum and zirconium imposes a synergistic effect on electrical properties provided by their mutual effects on the solubility in ZnO crystal lattice, while also allowing a moderate decrease of the thermal conductivity due to phonon scattering effects. At 1173 K the power factor of mixed-doped Zn0.994Al0.003Zr0.003O was 2.2-2.5 times higher than for single-doped materials. Stability tests of the prepared materials under prospective operation conditions indicated that the gradual increase in both resistivity and Seebeck coefficient in mixed-doped compositions with time may partially compensate each other to maintain a relatively high power factor. |
publisher |
ELSEVIER SCI LTD |
issn |
0955-2219 |
isbn |
1873-619X |
year published |
2019 |
volume |
39 |
issue |
4 |
beginning page |
1222 |
ending page |
1229 |
digital object identifier (doi) |
10.1016/j.jeurceramsoc.2018.11.029 |
web of science category |
Materials Science, Ceramics |
subject category |
Materials Science |
unique article identifier |
WOS:000457819600066
|