Event Title
The Seebeck Coefficient of Bismuth
Presentation Type
Poster/Portfolio
Presenter Major(s)
Physics
Mentor Information
Ross Reynolds, Harold Schnyders
Department
Physics
Location
Henry Hall Atrium 13
Start Date
10-4-2013 1:00 PM
End Date
10-4-2013 2:00 PM
Keywords
Physical Science, Technology
Abstract
This experiment was performed to determine the Seebeck Coefficient of Bismuth using a cylindrical sample near room temperature (21°C). The Seebeck Coefficient is a measure of an induced voltage across two ends of a given material under a small temperature gradient. This temperature difference causes electric charge carriers in the material to move from the warmer end of the material to the colder end, causing a potential difference. A simple relationship is used to determine the Seebeck Coefficient, S=V/T, where V is the potential difference between two ends subject to a temperature difference; T. The ratio of our measured voltage to the temperature difference was positive indicating that the charge carriers in Bismuth are electrons. Our data shows an average experimental value of 62.2 (µV)/K which implies that the Seebeck Coefficient of Bismuth is -62.2 (µV)/K which compares well with the accepted value of -70 (µV)/K.
The Seebeck Coefficient of Bismuth
Henry Hall Atrium 13
This experiment was performed to determine the Seebeck Coefficient of Bismuth using a cylindrical sample near room temperature (21°C). The Seebeck Coefficient is a measure of an induced voltage across two ends of a given material under a small temperature gradient. This temperature difference causes electric charge carriers in the material to move from the warmer end of the material to the colder end, causing a potential difference. A simple relationship is used to determine the Seebeck Coefficient, S=V/T, where V is the potential difference between two ends subject to a temperature difference; T. The ratio of our measured voltage to the temperature difference was positive indicating that the charge carriers in Bismuth are electrons. Our data shows an average experimental value of 62.2 (µV)/K which implies that the Seebeck Coefficient of Bismuth is -62.2 (µV)/K which compares well with the accepted value of -70 (µV)/K.