Producing method of mullite-like ceramic fiber

Abstract

Abstract PURPOSE: To obtain ceramic fibers, having the mullite composition, and suitable for a fibrous fire-resiting heat insulating material, by mixing specific aluminosilicate ceramic fibers with another alumina material, and heat-treating the resultant mixture. CONSTITUTION: (A) Aluminosilicate ceramic fibers with an Al 2 O 3 content ≤72 wt% are mixed with (B) polycrystalline high-alumina ceramic fibers, sol-like alumina, gel-like alumina, alumina powder and/or a substance with an Al 2 O 3 content ≥72wt% capable of forming α-Al 2 O 3 microcrystals on heating, and the resultant mixture is then heated to 950°C or above to give the aimed fibers. Preferably, the total content of Al 2 O 3 in the mixture is ≥72wt%, and the mixture consists of the component (A) and the polycrystalline high-alumina ceramic fibers. COPYRIGHT: (C)1982,JPO&Japio

Inventors

• 👤 Takaki Nakagami

Bibliographic Details