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Platinum as a Thermal Conductivity Standard

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1 Author(s)
Slack, Glen A. ; General Electric Research Laboratory, Schenectady, New York

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The thermal conductivity K of high‐purity platinum appears to be a reproducible quantity for temperatures between 75°K and the melting point at 2047°K. This behavior combined with the outstanding chemical and physical properties of platinum suggests that platinum could serve as a useful K standard in this region. From 200° to 2047°K the available data in the literature on K can be represented to within ±2% by K = (0.648+1.87×10-4T) W/cm deg. Some further work in determining K by several different methods, particularly at high temperatures, appears necessary before platinum can be adopted as a standard.

Published in:

Journal of Applied Physics  (Volume:35 ,  Issue: 2 )