| http://www.w3.org/ns/prov#value | - the glass-ceramic, wherein the glass-ceramic comprises the Al2O3, the ZrO2, and the metal oxide other than Al2O3 or ZrO2, wherein at least a portion of the metal oxide other than Al2O3 or ZrO2 is present as at least one distinct crystalline phase, wherein the glass-ceramic of each particle of the portion collectively comprises at least 50 percent by weight collectively of the Al2O3 and the ZrO2,
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