D4RR3N - 25-6-2009 at 07:09
I would like some large fused quartz test tubes for heating applications but cant find any in the UK, actually I cant find any at all. Anyone know
where I can get them?
1281371269 - 25-6-2009 at 07:25
Try:
http://technicalglass.thomasnet.com/
They ship to the UK. But it wont be cheap...
Mr. Wizard - 25-6-2009 at 07:49
Have you thought about the fused quartz tubes that surround halogen lamp bulbs? Have you thought about the fused silica tubes that surround the high
pressure mercury vapor tube inside a street light? This tube is inside the outer glass shell that has the phosphors on it.
The outer tubes of some UV sterilizing lamps are also clear fused quartz. I think they also sell them at aquarium and swimming pool supply stores. Is
sterilizing spelled with a z in the UK?
D4RR3N - 25-6-2009 at 10:43
Yes sterilizing is spelled with a Z in the UK, I know we use S often where Americans use Z.
Heating tubes etc use quartz but they are too thin. I'm looking for something with a larger diameter and a closed end.
I guess I will just have to order it from the US, thanks for the link Mossydie
1281371269 - 25-6-2009 at 11:55
Out of interest, what about quartz tubes make them worth the price?
12AX7 - 25-6-2009 at 13:59
You can basically melt iron in them, then immediately quench in water, and still have a test tube.
Tim
bfesser - 25-6-2009 at 14:11
Don't forget their optical properties.
1281371269 - 25-6-2009 at 14:20
Sounds good 
einstein(not) - 25-6-2009 at 19:23
How would one go about sealing the open end of a 3 inch quartz tube for a destructive distillation setup? I have plenty of 24/40 glassware but I'm
at a loss as to how to connect them. This tube has no flang and is straight cut. I have rubber stoppers that large but obviously they won't take
heat. Any ideas?
1281371269 - 26-6-2009 at 02:08
If they wont connect together in an obvious way, buy a connector or improvise one out of any material that will take the heat and wont interfere with
the reaction.
bfesser - 26-6-2009 at 05:21
You can't just connect quartz straight to borosilicate. You need to use a glass composition gradient, if anything. Not really something most
amateurs are capable of. You'd be best off contacting a skilled glassblower. To avoid the gradient, a flat flange might be your best bet.
Example of 'graded' glass:
http://www.adamschittenden.com/image_detail.php?id=138
[Edited on 6/26/09 by bfesser]