Thermocouples, seeback effect, fermi energies

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SUMMARY

This discussion centers on the investigation of thermocouples and the factors influencing the potential difference produced by different metal combinations. The Seebeck coefficient of Titanium (Ti) is established as 9.1 µV/K, with a resistivity of 23,810 (1/Ohm.cm). The inquiry also highlights the relevance of Fermi energy levels in thermocouple equations, specifically seeking data for titanium and its alloys, constantan and bronze. A reference to WO Patent WO2006033875A2 is provided for further information on Fermi energies.

PREREQUISITES
  • Understanding of thermocouples and their operation
  • Knowledge of the Seebeck effect and coefficients
  • Familiarity with Fermi energy levels in metals
  • Basic principles of electrical resistivity
NEXT STEPS
  • Research the Fermi energy levels for titanium and its alloys
  • Explore the Seebeck coefficients of various metals
  • Investigate the thermoelectric properties of constantan and bronze
  • Review the implications of WO Patent WO2006033875A2 on thermocouple design
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Physicists, materials scientists, and engineers interested in thermoelectric materials and their applications in temperature measurement and energy conversion.

wickedsingh
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Hello there fellow physicist,

Well for my A2 investigation I have done Thermocouples. I investigated the potential difference produced by different metal combinations. Now I need a hypothesis of some sort. What property of a metal will influence the potential difference produced by a thermocouple? I have done a bit of research on the net and have found that the whole thermocouple equation has the fermi energy level terms in it. Now I have found fermi energies for some of my metals but couldn't find it for titanium, or the alloys (constantan and bronze). Any help will be much appreciated.

So does anyone know what influence the potential difference produced?
Or the fermi energy of titanium? at 0K
 
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Hi wickedsingh,

The information you are looking for can be found in WO Patent WO2006033875A2 , at: https://patents.google.com/patent/WO2006033875A2/en

The Seeback coefficient of Titanium (Ti) is 9.1 uV/K [microvolts per kelvin], its resistivity is 23,810 (1/Ohm.cm)

Hope this helps mate.
 

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