Patent ID: 6921506

Claim:
A method of manufacturing a pressed thermal insulation body comprising the steps of: (1) providing a dry composition consisting of: (a) 10 to 100 percent by weight of volatilised silica containing a dispersion of 0.5 to 6 percent by weight of carbon; (b) 0 to 40 percent by weight of infra-red opacifier; (c) 0 to 50 percent by weight of particulate inorganic filler material; and (d) 0 to 25 percent by weight of reinforcing filaments; (2) pressing the dry composition from step (1) to form a body of a desired shape and density; and (3) heat treating the pressed body at a temperature in the range from 400 degrees Celsius to 1000 degrees Celsius to effect hardening thereof.