Dear Readers,
I need to build one (to maybe four) small tube furnaces to be used
on a vacuum extraction line.  They will/should be movable, up and down,
either held with talon clamps or on lab jacks.  I need to reach and
accurately maintain 550°C with
them in order to drive water from phosphate samples prior to torching
off the evacuated tubes. The tubes will be 6 mm OD Qtz.  Any suggestions on
whether to go with a heated metal block, if so how do I heat it (i.e., what
kind of heating element should be used, and how should it be powered)?  Or
should I use a mullite tube with a heating element wrapped around it, and
again, what type of heating element do you suggest.  We would also like to
be able to vary the temperatures on these furnaces, in addition 550°C, to
sometimes run them at 200°C, other times run them at 380°C

TIA
Mike

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Michael M. Cheatham
312 Heroy Geology Laboratory			Phone (315)-443-1261
Syracuse University					Fax   (315)-443-3363
Syracuse, NY 13244

email:[log in to unmask]
http://www.geochemistry.syr.edu/cheatham/Cheatham.HTML
http://www.geochemistry.syr.edu/cheatham/InstrPages.html
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