>> What is the 'ceramic paint', visible in many Russian nixies, deketrons and >> vfd tubes? >> May be this ia an good alternative for home-made tubes....!
> It's called Glass Frit, or Frit glass. I don't think that's the same thing. Frit glass is used to seal incompatible or delicate glasses together by sintering (like the end mirrors in "soft seal" HeNe tubes). I suspect Eric is asking about the white paint on the internal leads and structures of nixies, presumably to discourage a discharge between the leads, so it will be confined to the desired location on the cathodes. I wouldn't be surprised if it's similar to the powdered alumina suspension that vacuum tube heaters are dipped in to insulate them from the cathodes. It's a similar color, it's known to be an insulator, and it doesn't spoil a vacuum. According to this page: http://www.thevalvepage.com/valvetek/heater/heater.htm "This suspension is composed of a very pure, fused and milled alumina, in a solution of methanol, aluminium nitrate salt, and distilled water." - John KG4L -- 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.
