Corning 9608 is a major ceramics used in Corning WareÔ. Its basic chemical system is 70% SiO2, 18% Al2O3, 5% TiO2, 3% Li2O, 3% MgO, and 1% ZnO. The crystalline phase is primarily a b-spodumene (keatite) solid solution which provides low expansion, thermal shock resistance, and high chemical durability. In order to initiate internal crystallization, metal oxides, titania or titania-zirconia mixtures are added as nucleating agents.

After nucleating, the material is heated to a higher temperature in order for crystal growth to proceed; these temperatures are 750-1150°C. Usually the composition of the crystal is different from the composition of the glass . At high temperature, the first major crystalline phase with high-quartz solid solution appears. If heat is applied continuously at a longer duration, the concentration of high-quartz solid solution phase would increase at the glassy phase's expense. Fin ally, if heat is applied long enough, a b-spodumene (keatite) solid solution will then be formed. When heat treatment is over, the material may undergo additional finishing steps.

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