quartz seal
quartz seal
(OP)
HI,
Trying to seal a quartz tube with stainless steel flange, this is in a furnace which can operate at 500 deg C, I was going to use a hight temp oring, with water & gas cooling in the stel flange.
Does anybody know of a ,metal seal i could use??
Thanks
Trying to seal a quartz tube with stainless steel flange, this is in a furnace which can operate at 500 deg C, I was going to use a hight temp oring, with water & gas cooling in the stel flange.
Does anybody know of a ,metal seal i could use??
Thanks





RE: quartz seal
TTFN
RE: quartz seal
have you any idea where i can find such a supplier, any web site? can find any.
P
RE: quartz seal
TTFN
RE: quartz seal
Mike
RE: quartz seal
there are a number of methods you can use, but you'll have to be more specific about your physical arrangement
RE: quartz seal
Is there a metal seal that can take some expansion?
RE: quartz seal
couple of things:
you can use a "compression fitting" on the tube with grafoil lantern rings. tfe won't take the full temperature, but realize that your fitting temps will be considerably cooler.
500 C is not that hot, but you may need to think about radiation baffles to keep the heat off the end-connections.
a good glass shop can also fix you up with ground quartz/glass fittings that will take expansion
your actual and final MOC will depend on the gases in the hot zone.
you don't want to cool your metal fitting over much. that will only maximize the thermal stresses, but you do want to account for differential expansions as the system heats.
there are vacuum (metal/glass, metal/ceramic)feed-throughs that are available with materials of construction that account for the differential expansion and use of matched materials (cte matching).