Refractory object, glass overflow forming block, and process of forming and using the refractory object

摘要

A refractory object can include at least 10 wt % Al2O3. Further, the refractory object may contain less than approximately 6 wt % SiO2 or may include a dopant that includes an oxide of Ti, Mg, Ta, Nb, or any combination thereof. In an embodiment, at least approximately 1% of the Al2O3 in the refractory object can be provided as reactive Al2O3. In another embodiment, the refractory object may have a density of at least approximately 3.55 g/cc, a corrosion rate of no greater than approximately 2.69 mm/year, or any combination of the foregoing. In a particular embodiment, the refractory object can be used to form an Al—Si—Mg glass sheet. In an embodiment, the refractory object may be formed by a process using a compound of Ti, Mg, Ta, Nb, or any combination thereof.

主权项

1. A refractory object used in forming a glass object, the refractory object comprising:
at least 95 wt % Al2O3; at least about 0.5 wt % Ta2O5; at least about 0.5 wt % TiO2 and a porosity of at least 0.05 vol % and no greater than 9.0 vol %.