We once used art clay silver 650 paste:

http://www.artclayworld.com/cartgenie/prodList.asp?scat=417

but it will harden and turn into pure silver at that temperature.

maria

________________________________________
From: Petru Lunca Popa [petrulp@gmail.com]
Sent: 08 April 2011 11:13
To: General MEMS discussion
Subject: [mems-talk] Conductive paste for UH vacuum

Hi everyone,

Any idea for a silver or gold paste suitable for use at 10 -8 torr and
at high temperatures (around 800 C) ?

Thank you
Petru