Search found 131 matches

by steve_rb
Tue Nov 11, 2014 9:56 am
Forum: Vacuum Technology (& FAQs)
Topic: Please let us know your experience with glass to metal seal
Replies: 33
Views: 12875

Re: Please let us know your experience with glass to metal s

Tubes in eBay are not suitable for X-ray diffractometers.
Thank you for your notice. Yes I am aware of Be toxicity.
Anyone has practical experience with Kovar seals?
by steve_rb
Mon Nov 10, 2014 8:59 am
Forum: Vacuum Technology (& FAQs)
Topic: Please let us know your experience with glass to metal seal
Replies: 33
Views: 12875

Re: Please let us know your experience with glass to metal s

I am trying to build a custom made vacuum tubes like X-ray tube for a home made simple X-ray diffractometer. Also try to repair a few broken X-ray tube we have (1 target melted, 2 filament burned). Be windows are all OK. I might also give a scintillation detectors a try too.
by steve_rb
Mon Nov 10, 2014 3:09 am
Forum: Vacuum Technology (& FAQs)
Topic: Please let us know your experience with glass to metal seal
Replies: 33
Views: 12875

Re: Please let us know your experience with glass to metal s

I am OK with getters but no knowledge regarding this "metal-glass transition" thing. If I have got it right you mean all seals above not suitable for sealed tubes and I only have to use metal-glass transition (the one was at the above houskeeper video) right? In that video copper gets hot and oxidiz...
by steve_rb
Sun Nov 09, 2014 2:43 pm
Forum: Vacuum Technology (& FAQs)
Topic: Hot Ion gauge filament repair
Replies: 19
Views: 8776

Re: Hot Ion gauge filament repair

I also have a burned gauge with same look but only single filament. I might try to reppair it the same way. Thank you for sharing.
by steve_rb
Sun Nov 09, 2014 2:29 am
Forum: Vacuum Technology (& FAQs)
Topic: Please let us know your experience with glass to metal seal
Replies: 33
Views: 12875

Re: Please let us know your experience with glass to metal s

Yes I have noticed this. It looks getter material should be heated after tube sealed? Any experience with getter materials?
by steve_rb
Sat Nov 08, 2014 1:28 pm
Forum: Vacuum Technology (& FAQs)
Topic: Please let us know your experience with glass to metal seal
Replies: 33
Views: 12875

Re: Please let us know your experience with glass to metal s

I need the second sort. The one that holds the vacuum for years.
by steve_rb
Fri Nov 07, 2014 11:03 am
Forum: Vacuum Technology (& FAQs)
Topic: Please let us know your experience with glass to metal seal
Replies: 33
Views: 12875

Re: Please let us know your experience with glass to metal s

Hmm. Great. I really liked this indium and indium-tin thing. Richard could you please give some more info how I can do this? What critical points should be considered to have a good seal? Also I would like to know which type of metal can be sealed to which type of glass and ceramic? Also how this se...
by steve_rb
Fri Nov 07, 2014 4:51 am
Forum: Vacuum Technology (& FAQs)
Topic: Please let us know your experience with glass to metal seal
Replies: 33
Views: 12875

Re: Please let us know your experience with glass to metal s

Yes I noticed but Hysol 1C looks is good up to 10^-6 but Torr seal is good up to 10^-9. This was the reason I focused on Torr seal.
by steve_rb
Thu Nov 06, 2014 6:48 am
Forum: Vacuum Technology (& FAQs)
Topic: Please let us know your experience with glass to metal seal
Replies: 33
Views: 12875

Re: Please let us know your experience with glass to metal s

Interesting Video.
Also I found Varian TorrSeal resin epoxy bonder can stand up to 10^-9 torr. Anyone has used this bonder? How it behaves at 50 KV?
http://www.pchemlabs.com/product.asp?pid=2144
by steve_rb
Wed Nov 05, 2014 8:27 am
Forum: Vacuum Technology (& FAQs)
Topic: Please let us know your experience with glass to metal seal
Replies: 33
Views: 12875

Re: Please let us know your experience with glass to metal s

I would like to join an about 70mm cylindrical glass to about the same diameter cylindrical metal to make a 60 KV insulation. Room temperature will be OK. I have heard usually some sort of wetting agent should be applied between the glass and metal interface for better sealing/temperature coefficien...