abstract |
Methods for making glass-ceramics comprising Al 2 O 3 , REO, at least one of ZrO 2 or HfO 2 and at least one of Nb 2 O 5 or Ta 2 O 5 . Glass-ceramics according to the present invention can be made, formed as, or converted into glass beads, articles (e.g., plates), fibers, particles, and thin coatings. Some embodiments of glass-ceramic particles according to the present invention can be are particularly useful as abrasive particles. |