CPC C04B 41/5042 (2013.01) [B01J 12/005 (2013.01); B01J 19/02 (2013.01); C01B 3/36 (2013.01); C01B 3/386 (2013.01); C04B 35/484 (2013.01); C04B 35/486 (2013.01); C04B 35/4885 (2013.01); C04B 35/62222 (2013.01); C04B 41/009 (2013.01); C04B 41/87 (2013.01); C10J 3/72 (2013.01); B01J 2219/0218 (2013.01); C01B 2203/0261 (2013.01); C01B 2203/1235 (2013.01); C04B 2111/0025 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/3244 (2013.01); C04B 2235/3246 (2013.01); C04B 2235/3418 (2013.01); C04B 2235/604 (2013.01); C04B 2235/72 (2013.01); C04B 2235/76 (2013.01); C04B 2235/762 (2013.01); C04B 2235/765 (2013.01); C04B 2235/77 (2013.01); C04B 2235/786 (2013.01); C04B 2235/96 (2013.01); C04B 2235/9669 (2013.01)] | 4 Claims |
1. A combustion chamber operating in a reducing atmosphere comprising a refractory lining, wherein the refractory lining comprises a shaped and fired zirconia refractory material in the form of a brick based on granular CaO and/or MgO stabilized fused zirconia raw material low in silica, consisting essentially of crystalline zirconia, wherein the fired refractory material comprises a total content of tetragonal and cubic ZrO2 measured by X-ray powder diffraction analysis of at least 20% by weight, wherein the tetragonal ZrO2 is in the t-phase, wherein the Al2O3 content is 0.05-6% by weight, and wherein the SiO2 content of bonding phase of the material is below 1.5% by weight.
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