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  1. Newsgroups: sci.electronics
  2. Path: sparky!uunet!charon.amdahl.com!pacbell.com!sgiblab!zaphod.mps.ohio-state.edu!usc!newshub.sdsu.edu!chemteca.sdsu.edu!massoud
  3. From: massoud@chemteca.sdsu.edu (Massoud Ajami)
  4. Subject: Re: Heat conduction vs. electron conduction?
  5. Message-ID: <massoud.14.721504448@chemteca.sdsu.edu>
  6. Lines: 25
  7. Sender: news@newshub.sdsu.edu
  8. Nntp-Posting-Host: 130.191.227.22
  9. Organization: San Diego State University
  10. References: <1992Nov10.180223.25291@galileo.cc.rochester.edu>
  11. Date: Wed, 11 Nov 1992 17:54:08 GMT
  12.  
  13. In article <1992Nov10.180223.25291@galileo.cc.rochester.edu> mh001b@uhura.cc.rochester.edu (Matthew W. Hacker) writes:
  14. >From: mh001b@uhura.cc.rochester.edu (Matthew W. Hacker)
  15. >Subject: Heat conduction vs. electron conduction?
  16. >Date: 10 Nov 92 18:02:23 GMT
  17. >
  18. >Are there any substances that conduct electricity well, but
  19. >conduct heat poorly?  This sort of material would be pretty
  20. >well suited to thermacouple (Sp?) design...
  21. >
  22. > 
  23. >
  24. >-- 
  25. >Matthew W. Hacker                           mh001b@uhura.cc.rochester.edu
  26. >                                            AppleII forever!
  27.  
  28. Platinum which is used for thermocouples (types S, R, and B) has almost the 
  29. least thermal conductivity in metal group (pure).
  30. Platinum    0.73    watts/cm C  @ 25 degree     0.79  @ 100 degree
  31. copper      3.98      "              "          4.83       "
  32. Stainless steel has also very poor thermal conductivity.
  33.  
  34.  
  35.  
  36. Peace and Prosperity!
  37.   ---==< 110 >==---
  38.