Abstract: Disclosed is a composition for metallizing a ceramic surface which consists essentially of 10.0 to 32.5% by weight of Mn, 45.0 to 67.5% by weight of W, up to 5.0% by weight of at least one member selected from Ti and Zr, and Ag and Ni in a total amount of 15.0 to 35.0% by weight, the amount of Ni being 5.0 to 20.0% by weight of the total amount of Ni and Ag. This composition is applied to the surface of a ceramic body in the form of a metal paste or metal powder and heat-fusion-bonded to the ceramic surface, or the composition is applied to the surface of a ceramic body by the gas-phase deposition method.

Abstract: A metallizing composition essentially consists of given amounts of Ni, Nb, Cr, C, Si, Zr, SiC and W and is used for metallizing the surface of ceramics such as Si.sub.3 N.sub.4, SIALON, A1N, high purity alumina and so on. This composition forms a metallized layer having an excellent bonding strength to the ceramic surface.