Glazed areas that are exposed to an extremely high temperature gradient

Secure such extremely high temperature gradients are present, for example at room stations Welraum missiles or polar stations. DOLLAR A In order to ensure high temperature stability, there is the glazing of a disk package in which the surface facing the surroundings outer disk is made of glass ceramic. DOLLAR A is Preferably, the glass ceramic has a floated glass ceramics on the basis of a floated Alumosilikatglases, creating a very low surface roughness is given which allows a distortion-free viewing and ensures a high degree of cleaning.