Ceramic fibers for the reinforcement of refractory materials
AssigneePem Abrasifs Refractaires
InventorJean-Andre Alary
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Abstract
The subject of the invention is ceramic fibers for the reinforcement of refractory materials, being constituted by sintered bauxite fibers with a length/diameter greater than 10. Preferably, they have a cylindrical or prismatic shape truncated by two surfaces, for example, substantially planar surfaces perpendicular to the axis of the prism. They enable the mechanical strength and the lifetime of the refractory products to be significantly increased.
Claims11
A castable, metal oxide based refractory material, comprising, as a reinforcement, 0.1 to 50% by weight of fibers produced by crushing and calcining natural bauxite, forming a paste with the crushed, calcined bauxite by mixing with a binder, extruding and sintering the paste and cutting the sintered paste to form fibers, the fibers having a length/diameter ratio greater than 10, and an equivalent diameter between 0.2 and 1 mm.
Fibers for reinforcing refractory materials comprising sintered bauxite with a star-shaped cross section and a length/diameter ratio greater than 10, and an equivalent diameter between 0.2 and 1 mm.
Fibers for reinforcing refractory materials comprising sintered bauxite with a length/diameter ratio greater than 10, and an equivalent diameter between 0.2 and 1 mm, which have been produced by crushing natural bauxite, calcining the crushed bauxite, forming a paste with the calcined crushed bauxite by mixing with a binder, extruding the paste, cutting the extruded paste and sintering the cut, extruded paste to form the fibers.
Dependencies are inferred from the claim text.