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Development of a New Low-Cost Measurement System for Electrical Conductivity, Hall Constant and Seebeck Coefficient at Temperatures up to 800°C

Title data

Werner, Robin ; Kita, Jaroslaw ; Gollner, Michael ; Linseis, Florian ; Moos, Ralf:
Development of a New Low-Cost Measurement System for Electrical Conductivity, Hall Constant and Seebeck Coefficient at Temperatures up to 800°C.
2020
Event: VCT 2020 : Virtual Conference on Thermoelectrics , 21.-23. Juli 2020 .
(Conference item: Conference , Speech )

Abstract in another language

The determination of the electrical transport parameters, such as electrical conductivity, charge carrier density, Hall mobility and the Seebeck coefficient over a wide temperature range and under different atmospheres are essential to characterize a material electrically. We report on a combined measuring device, which allows to measure all of these parameters within one measuring cycle up to 800°C. The measurement device consists of two movable permanent magnetic yoke-systems of opposite polarity, as well as a fixed gas-floated measurement chamber in which a ceramic sample holder is installed. A screen-printed platinum heating structure on the bottom side of the Al2O3 sample holder was designed by FEM-Simulation 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 difference within the sample area. Thermal imaging validated a homogenous temperature distribution for Hall-measurements as well as a temperature difference for Seebeck-measurements. Four moveable electrodes on the top side allow measurements of any geometry according to van der Pauw’s method. Two additional Au-Pt thermocouples were placed between the sample and the electrodes to determine the contact temperature and the occurring thermoelectric voltage. Measurements of known materials confirm the functionality of the measurement device.

Further data

Item Type: Conference item (Speech)
Refereed: No
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: 04 Sep 2020 07:39
Last Modified: 04 Sep 2020 07:39
URI: https://eref.uni-bayreuth.de/id/eprint/56794