In connection with a prototype design I'm developing for a meteorological measurement device, I'm looking for a readily available material with the following physical properties:
1) Moderately resistive -- it will be used for resistive heating by passing a current through a thin sheet sandwiched between two metal conductors. Target resistivity should fall in the range 10 to 10**4 m*ohm at temperatures between 0 and 100 C.2) A marked increase in resistivity with increasing temperature (this apparently rules out silicon, for example).
3) Mechanically stable and easy to work with in sheets or disks of order 0.1 mm thickness, 30 cm diameter.4) Not subject to significant degradation or aging, even at sustained temperatures near 100 C.
If anyone either knows offhand of a material matching the above description or can point me to a good tabulation of candidate materials, please let me know.
thanks
________________________________________ Prof. Grant W. Petty Atmospheric and Oceanic Sciences
1225 W. Dayton Street University of Wisconsin-Madison Madison, WI 53706snipped-for-privacy@aos.wisc.edu Tel: (608) 263-3265 Fax: (608) 262-0166