| abstract |
A refractory object can include at least approximately 10 wt% A1 2 O 3 and at least approximately 1 wt% SiO 2 . In an embodiment, the refractory object can include an additive. In a particular embodiment, the additive can include TiO 2 , Y 2 O 3 , SrO, BaO, CaO, Ta 2 O 5 , Fe 2 O 3 , ZnO, or MgO. The refractory object can include at least approximately 3 wt% of the additive. In an additional embodiment, the refractory object can include no greater than approximately 8 wt% of the additive. In a further embodiment, the creep rate of the refractory object can be at least approximately 1 x 10 -6 h -1 . In another embodiment, the creep rate of the refractory object can be no greater than approximately 5 x 10 -5 h -1 . In an illustrative embodiment, the refractory object can include a glass overflow trough or a forming block. |