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Werner, Robin ; Kita, Jaroslaw ; Gollner, Michael ; Linseis, Florian ; Moos, Ralf:
On the development of a new measurement system for conductivity, Hall constant and Seebeck coefficient.
2018
Veranstaltung: 37th International and 16th European Conference on Thermoelectrics
, 1.7.-5.7.2018
, Caen, France.
(Veranstaltungsbeitrag: Kongress/Konferenz/Symposium/Tagung
,
Poster
)
Abstract
It is of increasing importance in materials characterization to know the electrical transport properties like the electrical conductivity, the Hall constant, and the Seebeck coefficient for high temperature applications. However, high temperature measurements require specific devices in order to avoid electrical, thermal or geometrical errors. We report on the current state of the development of a new measurement system that combines the electrical conductivity, Hall constant and Seebeck coefficient measurements in a temperature range from -150°C up to 800 °C in different gas atmospheres. The use of only one sample holder with the need for only one sample facilitate the handling and assures the same experimental conditions of the measured parameters. The new system consists of a gas oated measurement chamber and two permanent magnet yoke systems of opposite polarity. The magnets with a magnetic ux density of +/- 760 mT are placed on a moveable sled to change the polarity of the magnetic field in the measurement chamber. The sample holder, based on alumina substrate, can be easily mounted in the chamber. On the front side are four electrodes located allowing Hall and resistivity measurements according to van der Pauw's method. On the reverse side a screen-printed Platinum structure for Joule's heating was placed. To guarantee a homogenous temperature distribution within the sample, the new holder was designed by FEM analysis. For future measurements of Seebeck coefficient the sample holder will be equipped with an additional heater and thick-film thermocouples.
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: | 04 Jul 2018 05:48 |
| Letzte Änderung: | 04 Jul 2018 05:48 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/44954 |