Diamagnetic Levitation Thermometer

This paper reports a diamagnetic levitation thermometer using a pyrolytic graphite (PG). The levitation height of diamagnetic materials depends on the temperature. The system is composed of a PG disc, permanent magnet for driving, non‐contact laser displacement meter, and spot heater. We evaluated t...

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Bibliographic Details
Published in:IEEJ transactions on electrical and electronic engineering 2020-05, Vol.15 (5), p.773-774
Main Authors: Inomata, Naoki, Inomata, Eiji, Ono, Takahito
Format: Article
Language:English
Subjects:
Diamagnetism
Differential thermal analysis
Electric contacts
Levitation
magnetic levitation
Permanent magnets
Polystyrene resins
Pyrolytic graphite
thermometer
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Summary:This paper reports a diamagnetic levitation thermometer using a pyrolytic graphite (PG). The levitation height of diamagnetic materials depends on the temperature. The system is composed of a PG disc, permanent magnet for driving, non‐contact laser displacement meter, and spot heater. We evaluated the height in air and vacuum changing the temperature of the PG disc, and the disc changes its height as to be −1.49 and 1.55 µm/°C in air and vacuum, respectively. Differential thermal analysis of polystyrene is demonstrated. The potential of the diamagnetic levitation as a new principle measuring temperature changes is indicated. © 2020 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
ISSN:1931-4973
1931-4981
DOI:10.1002/tee.23115