On the high-temperature oxidation of ZnSb for thermoelectric applications
Source abstract
Abstract
Thermoelectric ZnSb has a native surface oxide layer of Sb2O5 +ZnO, while HT oxidation in air resulted in selective oxidation to ZnO, with no detectable Sb by STEM-EDS. The ZnO consisted of an inner nano-granular and a more columnar outer layer. Thermogravimetry showed parabolic oxidation kinetics at 200–325 °C with an activation energy of 117 kJ/mol, comparing well with literature for oxidation of Zn. Two-stage 16O2 +18O2 oxidation followed by SIMS suggests growth by mixed Zn and O diffusion through a protective ZnO layer that still cannot prevent considerable high temperature oxidation in air, with formation of insulating electrical contacts, unless metallised.
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Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Gas Sensing Nanomaterials and Sensors · Chalcogenide Semiconductor Thin Films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (18)
Show source-provided references
1. Nolas · 2001 · 1
2. Introduction to thermoelectrics10.1063/1.4954055 ↗
3. Review of research on the thermoelectric material ZnSb
4. Zn vacancy formation, Zn evaporation and decomposition of ZnSb at elevated temperatures: influence on the microstructure and the electrical properties10.1016/j.jallcom.2017.03.339 ↗
5. Enhancement of thermoelectric properties by energy filtering: theoretical potential and experimental reality in nanostructured ZnSb10.1063/1.4944716 ↗
6. Preparation and properties of ZnSb thermoelectric material through mechanical-alloying and spark plasma sintering10.1016/j.cej.2016.04.063 ↗
7. Enhanced thermoelectric figure of merit in p-type Ag-doped ZnSb nanostructured with Ag3Sb10.1016/j.scriptamat.2013.05.029 ↗
8. F. de la Peña, e.a., hyperspy/hyperspy: HyperSpy v1.5.2. 2019, Zenodo.
9. About the oxygen diffusion mechanism in ZnO10.1016/j.ssi.2003.08.045 ↗
10. Oxygen diffusion in pure and doped ZnO10.1590/S1516-14392003000200011 ↗
11. Diffusion of zinc vacancies and interstitials in zinc oxide10.1063/1.2206559 ↗
12. Zn vacancy formation energy and diffusion coefficient of CVT ZnO crystals in the sub-surface micron region10.1038/s41598-018-31771-1 ↗
13. The mechanism of Zn diffusion through ZnO in secondary battery: a combined theoretical and experimental study10.1021/acs.jpcc.0c03514 ↗
14. Kinetics of the formation of oxide films on zinc foil10.1039/tf9514700501 ↗
15. Kinetics and modeling of diffusion phenomena occurring during the complete oxidation of zinc powder: influence of granulometry, temperature and relative humidity of the oxidizing fluid10.1016/S1293-2558(00)00130-8 ↗
16. A fundamental study of the kinetics of zinc oxidation in the temperature range 320–415°C in atmospheres of pure oxygen and oxygen doped with gaseous impurities10.1016/0010-938X(81)90071-8 ↗
17. On the oxidation mechanism of alumina formers10.1007/BF00662968 ↗
18. 18O/SIMS characterization of the growth mechanism of doped and undoped α-Al2O310.1007/BF00665610 ↗