There is some information in this article, presumably first hand information from a Burroughs engineer, on the extended life when mercury was added: https://spectrum.ieee.org/tech-history/dawn-of-electronics/the-nixie-tube-story-the-neon-display-tech-that-engineers-cant-quit (just search for mercury).
I also know of a few patents whoch describe this, but don't have the numbers at hand, I do however think these were by Burroughs. /Martin -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/cf14f263-3901-4fef-8dbe-b80c9b66583ao%40googlegroups.com.
