CPC C04B 35/185 (2013.01) [C03B 5/43 (2013.01); C04B 35/657 (2013.01); C04B 35/66 (2013.01); C04B 41/009 (2013.01); C04B 41/5037 (2013.01); C04B 41/87 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/3222 (2013.01); C04B 2235/3227 (2013.01); C04B 2235/3229 (2013.01); C04B 2235/3232 (2013.01); C04B 2235/3241 (2013.01); C04B 2235/3243 (2013.01); C04B 2235/3267 (2013.01); C04B 2235/3272 (2013.01); C04B 2235/3274 (2013.01); C04B 2235/3279 (2013.01); C04B 2235/3293 (2013.01); C04B 2235/3418 (2013.01); C04B 2235/3813 (2013.01); C04B 2235/5409 (2013.01); C04B 2235/5436 (2013.01); C04B 2235/5445 (2013.01); C04B 2235/72 (2013.01); C04B 2235/77 (2013.01); C04B 2235/80 (2013.01)] | 6 Claims |
1. A refractory article comprising:
a body including a ceramic consisting of:
mullite present in an amount of at least 93 wt % and not greater than 97 wt % for a total weight of the body; and
a dopant consisting of a combination of MgAl2O4 and Fe3O4, wherein the dopant is present in an amount of at least 3 wt. % and not greater than 7 wt. % for a total weight of the body,
wherein the body comprises an average relative emissivity over a wavelength of 0.5 microns to 5 microns of at least 0.8 and not greater than 0.99, and
wherein the body comprises a melting temperature of at least 1600° C. and not greater than 3200° C.
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