Abstract: A material composite that is vacuum-tight and resistant to thermal shocks is disclosed along with a method for the production thereof and to its use. A permanent connection between an aluminum oxide sapphire and an aluminum oxide ceramic is attained by a first connecting later comprised of a manganese-silicate glass, in which at least one of the metals molybdenum, tungsten, palladium or platinum is incorporated, and by a second connecting layer comprised of a manganese-silicate glass. To this end, the individual materials are fused by sintering. The material composite is used, for example, for inserting a window comprised of aluminum oxide sapphire into a housing for a light-ignitable thyristor.

Abstract: The invention relates to a material composite (1) that is vacuum-tight and resistant to thermal shocks, to a method for the production thereof and to its use. A permanent connection between an aluminum oxide sapphire (2) and an aluminum oxide ceramic (5) is attained by a first connecting layer (3) comprised of a manganese-silicate glass, in which at least one of the metals molybdenum, tungsten, palladium or platinum is incorporated, and by a second connecting layer (4) comprised of a manganese-silicate glass. To this end, the individual materials are fused by sintering. The material composite (1) is used for inserting a window comprised of aluminum oxide sapphire (2) into a housing (16) for a light-ignitable thyristor (24).