In another embodiment, a shell mold for casting molten material to form an article comprises a facecoat disposed on an inner surface of the shell mold that contacts 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 {HEAD ~ a slurry} comprising {TAIL ~ zirconium silicate} and colloidal silica with a stucco comprising aluminum oxide 
comprising
In another embodiment , a shell mold for casting molten material to form an article comprises a facecoat disposed on an inner surface of the shell mold that contacts 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 { HEAD ~ a slurry } comprising { TAIL ~ zirconium silicate } and colloidal silica with a stucco comprising aluminum oxide
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