Method and apparatus for thermal joining of components made of silicate materials, silica composites and silicate composite materials

In a method for the thermal joining of components (B) of silicate materials at a joint (S) with each other components to be joined (B) at least in a region around the joint location (S) is heated to a preheat temperature below its softening point. In the heated components (B) (S) is introduced additional heat energy at the joint to give (S) to heat the joint to a joining temperature at or above the temperature of the softening point. Preferably, a laser device (6) is used for the additional heat input. Furthermore, a suitable device for the process is specified. can be connected flat or solid geometrical Any components (B) of silicate materials stress in very high quality together therewith.