Patent ID: 6548436
Filing Date: 2003-04-15
Classification: C04B

Abstract:
A refractory material comprised of mullite crystals in a cristobalite-free matrix, said mullite crystals identifiable by X-ray diffraction peaks at 2&thgr;=16.5Â°, 26.5Â°, 31Â°, 33.3Â°, 35.3Â° and 40.9Â°, and said cristobalite-free matrix being comprised of the following material:alumina (Al2O3); silica (SiO2); and at least 2% by weight of an oxide selected from the group consisting of barium oxide (BaO) and strontium oxide (SrO). A refractory material as described in claim 1 wherein said cristobalite-free matric contains 2% to about 20% by weight of an oxide selected from the group consisting of barium oxide (BaO) and strontium oxide (SrO).