Thermocouples, seeback effect, fermi energies

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The discussion focuses on investigating the potential difference in thermocouples formed by different metal combinations, specifically looking for a hypothesis related to the influencing properties of metals. The relationship between thermoelectric effects and fermi energy levels is highlighted, with a specific inquiry about the fermi energy of titanium and its alloys. A user provides a resource for further information and shares specific data on the Seebeck coefficient and resistivity of titanium. This exchange emphasizes the importance of fermi energy in understanding thermocouple behavior. Overall, the conversation aims to deepen the understanding of thermoelectric properties in metals.
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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