Abstract: According to the invention, a simple and reliable cooling device for a computer, comprising a processor (4), mounted on a main board (5), the temperature of which may be maintained at a temperature below ambient, in particular at a negative temperature, by means of an active cooling unit (3), may be achieved, whereby the processor (4) and the main board (5) are placed in a cooled box (6), made from a micro-porous pressed ceramic powder based on a metal oxide, in particular, pyrogenically-created highly-dispersed silicic acid or silicon aerogel.

Abstract: A molded thermal insulator body, in particular a thermal insulator plate comprises, for the purposes of a better flexibility, a prepressed base body (1) substantially containing at least one center layer (3), predominantly made of a highly dispersed ceramic material such as silica aerogel (SiO.sub.2), and an upper and a lower support layer (2), predominantly made out of flexible paper, foil, cardboard, or felts of ceramic material, or of a mixture of at least two of the same, preferably of ceramic paper, foil or cardboard, and wherein the base body is enveloped by a shrinkable plastic foil (4).