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Measurement device for measuring the electrical conductivity, the Hall constant and the Seebeck coefficient up to 800 °C

Title data

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
Event: 18th European Conference on Thermoelectrics, ECT'22 , 14.-16. Sept. 2022 , Barcelona, Spain.
(Conference item: Conference , Poster )

Abstract in another language

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.

Further data

Item Type: Conference item (Poster)
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 27 Sep 2022 08:14
Last Modified: 27 Sep 2022 08:14
URI: https://eref.uni-bayreuth.de/id/eprint/71980