In another embodiment, a shell mold for casting molten material to form {HEAD ~ 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 a slurry comprising zirconium silicate and colloidal silica with a stucco comprising {TAIL ~ aluminum oxide} 
In another embodiment , a shell mold for casting molten material to form { HEAD ~ 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 a slurry comprising zirconium silicate and colloidal silica with a stucco comprising { TAIL ~ aluminum oxide }
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