Hi Dalibor,
no, sadly I don't know about that. Are you interested in a sample? I
have two identival samples, I can send you the unopened one if you wish.
Jens
Hi Jens,
thanks for that info, I will look on it.. Do You know if it doesnt
outgass in vacuum?
Dalibor
2012/7/1 jb-electronics <webmas...@jb-electronics.de
<mailto:webmas...@jb-electronics.de>>
Hi Dalibor,
for now I use this cement here:
http://www.zircarceramics.com/pages/cem-rig/specs/al-cem.htm
I think David from this group here pointed me to that site.
You can order samples very easily; this substance is a little
brittle ;-), though. It does not require a bakeout for hardening,
room temperature is just fine, it will only take a few minutes.
But I am also interested in a more professional solution. Any ideas?
Jens
Hello guys,
I am looking for any information about how the alumina compound
for vacuum tubes is prepared.. It is used to insulate electrodes
(what should not glow) and also support some joints inside the
tubes. It look like a white ceramics..
Alumina is not soluble in water/ethanol etc.. so some binder must
take place.. I found, that binder consists of water, methanol and
aluminum nitrate. I prepared a compound according to one patent
(60% alumina, 40% binder made from aluminum nitrate water and
ethanol), but it didn't make hard compound (even when baked).. It
just flaked of the wire..
Is there anyone who have some closer info about that or could
point me somewhere?
I used Dieter's picture (thanks), You can see two white drops of
alumina here..
Thanks, Dalibor
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