Isabelline

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Isabellin is the brand name of an alloy made from around 84% copper , 13% manganese and 3% aluminum . Isabellin was registered as a trademark of the eponymous Isabellenhütte Heusler in 1932 .

Isabelline is a resistance alloy whose mass density of 8.0 g / cm 3 is lower than that of the widely used constantan , but has the same specific electrical resistance of 0.5 μΩ · m. The maximum operating temperature is 400 ° C.

While constantan has a very high thermal voltage compared to copper and is therefore often used for thermocouples , it is negligibly small with Isabellin, which is why this material is very well suited for the construction of measuring resistors . Isabelline is therefore mainly used to make shunts , relay contacts, and wires.

Literature sources

  • Gerhard Fasching: Materials for electrical engineering: microphysics, structure, properties. ISBN 3-211-22133-6 , p. 326.
  • Wolfgang Bergmann: Material technology Part 2: Application: Material production - Material processing - Material application. ISBN 978-3-446-41711-3 , p. 512.