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Werner, Robin ; Kita, Jaroslaw ; Gollner, Michael ; Linseis, Florian ; Moos, Ralf:
Measurement device for measuring the electrical conductivity, the Hall constant and the Seebeck coefficient up to 800 °C.
2022
Veranstaltung: 18th European Conference on Thermoelectrics, ECT'22
, 14.-16. Sept. 2022
, Barcelona, Spain.
(Veranstaltungsbeitrag: Kongress/Konferenz/Symposium/Tagung
,
Poster
)
Abstract
The determination of electrical transport properties like the electrical conductivity, the charge carrier density, the charge carrier mobility, and the Seebeck coefficient is of increasing importance in material characterization for high temperature applications. Currently, several, often costly measurement devices are required for this, especially when intended for high-temperature application. In our contribution, we report on the current state of development of a measurement device that allows the combined measurement of the above-mentioned parameters up to a maximum operating temperature of 800 °C. The measurement device moreover avoids to use expensive furnaces and electromagnets, making it a costeffective alternative. The main component of the new measurement system is the sample holder, which is based on a 635 μm thick alumina substrate. A screen-printed platinum heating structure on the bottom side of the Al2O3 sample holder was designed by FEM-simulations allowing to heat a sample area of maximum 12.7 mm diameter up to 800 °C by Joule heating. An additional screen-printed heater, also on the bottom side, is used to generate a temperature gradient within the sample area. Thermal imaging validated a homogenous temperature distribution for Hallmeasurements as well as a temperature difference for Seebeck-measurements. On the top side, four moveable electrodes allow measurements of any geometry according to van der Pauw’s method. Two additional thermocouples were placed between the sample and the electrodes to determine the contact point temperature and the occurring thermoelectric voltage. Measurements of known materials confirm the functionality of the measurement device.
Weitere Angaben
| Publikationsform: | Veranstaltungsbeitrag (Poster) |
|---|---|
| Begutachteter Beitrag: | Ja |
| Institutionen der Universität: | Fakultäten > Fakultät für Ingenieurwissenschaften Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien > Lehrstuhl Funktionsmaterialien - Univ.-Prof. Dr.-Ing. Ralf Moos Profilfelder > Advanced Fields > Neue Materialien Forschungseinrichtungen > Forschungszentren > Bayreuther Materialzentrum - BayMAT Fakultäten Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien Profilfelder Profilfelder > Advanced Fields Forschungseinrichtungen Forschungseinrichtungen > Forschungszentren |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften |
| Eingestellt am: | 27 Sep 2022 08:14 |
| Letzte Änderung: | 27 Sep 2022 08:14 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/71980 |