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 -- Dalibor Farny http://dalibor.farny.cz -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
