title: Electrical conductivity measurements on disk-shaped samples.
abstract: We have developed a sample holder design that allows for electrical conductivity measurements on a disk-shaped sample. The sample holder design is based on and compatible with popular measurement systems that are currently restricted to bar-shaped samples. The geometrical correction factors which account for the adjusted measurement configuration were calculated using finite element modeling for a broad range of sample and measurement geometries. We also show that the modeling results can be approximated by a simple analytical fit function with excellent accuracy. The proposed sample holder design is compatible with a concurrent measurement of the Seebeck coefficient. The chosen sample geometry is furthermore compatible with a thermal conductivity measurement using a laser flash apparatus. A complete thermoelectric characterization without cutting the sample is thus possible.
authors.affiliation: Institute of Materials Research, German Aerospace Center, Linder Höhe, 51147 Köln, Germany.
authors.forename: J
authors.initials: J
authors.lastname: de Boor
authors.affiliation: Institute of Materials Research, German Aerospace Center, Linder Höhe, 51147 Köln, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Zabrocki
authors.affiliation: Linseis Meßgeräte GmbH, Vielitzerstrasse 43, 95100 Selb, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Frohring
authors.affiliation: Institute of Materials Research, German Aerospace Center, Linder Höhe, 51147 Köln, Germany.
authors.forename: E
authors.initials: E
authors.lastname: Müller