A silver-metal oxide composite material comprising a silver matrix, (a) from 1 to 20% by weight, in terms of elemental metal, of an oxide of at least one element selected from the group consisting of Sn, Cd, Zn and In and, optionally, (b) an oxide of Mg, Zr, etc. and/or (c) an oxide of Cd, Sb, etc.;...http://www.google.se/patents/US5160366?utm_source=gb-gplus-sharePatent US5160366 - Silver-metal oxide composite material and process for producing the same
