In another embodiment, a shell mold for casting molten material to form an article comprises a facecoat disposed on an inner surface of {HEAD ~ the shell mold} that contacts {TAIL ~ the molten material} during use thereof, said facecoat having a phase comprising a high emissivity alumina solid solution, wherein the high emissivity alumina solid solution is formed from a slurry comprising zirconium silicate and colloidal silica with a stucco comprising aluminum oxide 
In another embodiment , a shell mold for casting molten material to form an article comprises a facecoat disposed on an inner surface of { HEAD ~ the shell mold } that contacts { TAIL ~ the molten material } during use thereof , said facecoat having a phase comprising a high emissivity alumina solid solution , wherein the high emissivity alumina solid solution is formed from a slurry comprising zirconium silicate and colloidal silica with a stucco comprising aluminum oxide
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