C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
25/132, 261/24
C04B 35/00 (2006.01) C04B 30/00 (2006.01) C04B 30/02 (2006.01)
Patent
CA 1146981
ABSTRACT OF THE DISCLOSURE A method and apparatus for producing shaped heat-insulating bodies based on water-insoluble oxidic metal compounds particularly of the elements silicon and aluminum, clouding agents and other additives, whereby the bodies are thermally hardened and have a heat conductivity of 0.2 to 0.1 W/K.m at temperatures of approximately 300 to 500°C and are comprised of (a) 100 parts by weight of water-insoluble oxidic metal compounds having a BET-surface of 10 to 700 m2/g, with the provision that at least 5% by weight of these compounds have a BET-surface of at least agents having at least one absorption maximum in the wave length range of 1.5 to 10 µm; and (c) 0.1 to 30 parts by weight of elements capable of forming a solid oxide having a standard formation of enthalpy of less than minus 900 KJ/Mol. In addition, 0-100 parts by weight of mineral fibers can be added. The mixture is then put into a mold of the desired shape, compressed to densities between 0.15 to 1 g/cm3, and heated to temperatures between 200 to 900°C so that a chemical reaction will take place. The cooled heat-insulating body so formed mat be used as a structural element in the building industry, for electrical devices and for various installations.
364720
Katzer Hans
Kratel Gunter
Consortium Fur Elektrochemische Industrie G.m.b.h.
Mcfadden Fincham
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