Patent ID: 7540155
Filing Date: 2009-06-02
Classification: F23M,F23R,Y10T

Abstract:
1. A heat shield brick, comprising: a hot side, adapted to be exposed to a hot medium; a wall side, on an opposite side from the hot side; a hot-side region, adjoining the hot side; and a wall-side region, adjoining the wall side, wherein a mean grain size in the wall-side region is relatively smaller than a mean grain size in the hot-side region, wherein layers of decreasing grain size are provided in a direction from the hot side toward the wall side, so that a stepped adjustment of the grain size is achieved, wherein the heat shield brick includes at least a first substance and a second substance different from the first substance, wherein a concentration of the first substance in the wall-side region is relatively greater than in the hot-side region, and wherein the first substance is an oxide and the second substance is a silicate.