Glazing, which can be subjected to high levels of thermal stress and comprising a glass body

The invention concerns a glazing which can be subjected to high levels of thermal stress, in particular for fire-resistant glazing, and comprising a glass body. The fire-resistant glazing includes one or more glass pane, at least one of which consists of glass containing nucleating agents so that the glass pane is at least partially ceramicized when subjected to high thermal stress sufficient to cause ceramicizing, for example during a fire. The glass may be tempered and contains, in percent by weight based on oxide content SiO, 55 to 69; AlO, 19 to 25 and LiO, 3.2 to 5.0. This glass pane combines the advantages of the strength of tempered glass at low temperature with the stability and long-term resistance to thermal stress of glass-ceramic material at high temperature. The fire-resistant glazing can also include at least one other glass pane made of a conventional glass and at least one plastic layer of PVB film.