Patent ID: 7825052

Claim:
A refractory material comprising: a fibrous body formed of; alumina silicate fibers; an additive selected from a group consisting of silicon carbide, silicon nitride, boron carbide, boron nitride and silicon carbo-nitride, the additive blended with the alumina silicate fibers; and colloidal silica that acts as a binder; wherein the alumina silicate fibers provide structural integrity to the fibrous body; wherein the linear shrinkage of the material is no greater than 3.5% at 2600 degrees Fahrenheit; wherein the material has a silica content of 25% or less by weight; wherein the colloidal silica makes up 4.5% to 5.0% of the material by weight; and wherein the additive makes up 50.0% to 55.0% of the material by weight.