Alumel
Alumel is a magnetic nickel-based alloy consisting of 90.7% nickel , 3.1% manganese , 4.2% aluminum and 2.0% silicon (both atomic percent ).
Alumel is often used in an Alumel- Chromel connection as a thermocouple pair of type K for temperature measurement of 1000 ° C (briefly also 1300 ° C) with 41 µV / K.
To measure the temperature, an electrical voltage is generated at the free ends of the two interconnected conductors in the event of a temperature difference along the conductors due to the Seebeck effect . The temperature can be determined from this based on the physical properties.
Alumel and Chromel are registered trademarks of Concept Alloys Inc. (formerly Hoskins Manufacturing Company ).
Individual evidence
- ^ The Theory and Properties of Thermocouple Elements . 1971, ISBN 0-8031-0074-4 , pp. 58 ( limited preview in Google Book search).
- ^ Franz X. Eder: Working methods of thermodynamics Volume 1: Temperature measurement . Springer-Verlag, 2013, ISBN 978-3-642-48046-1 , p. 75 ( limited preview in Google Book search).
- ^ Charles P. Poole, Jr .: Encyclopedic Dictionary of Condensed Matter Physics . Academic Press, 2004, ISBN 0-08-054523-8 , pp. 880 ( limited preview in Google Book search).
- ^ Robin E. Bentley: Handbook of Temperature Measurement Vol. 3 The Theory and Practice of Thermoelectric Thermometry . Springer Science & Business Media, 1998, ISBN 981-4021-11-3 , p. 42 ( limited preview in Google Book search).
- ↑ Concept Alloys ( Memento from December 26, 2009 in the Internet Archive )