Ceramics comprising Al2O3, REO, ZrO2 and/or HfO2, and Nb2O5 and/or Ta2O5 and methods of making the same
Assignee3M Innovative Properties Company
InventorsAnatoly Z. Rosenflanz, Craig R. Schardt
Life of this patent
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Abstract
Ceramics comprising (i) at least one of Nb2O5 or Ta2O5 and (ii) at least two of (a) Al2O3, (b) REO, or (c) at least one of ZrO2 or HfO2. Embodiments of ceramics according to the present invention can be made, formed as, or converted into optical waveguides, glass beads, articles (e.g., plates), fibers, particles (e.g., abrasive particles), and thin coatings.
Claims33
Glass collectively comprising at least 80 percent by weight of (i) at least one of Nb2O5 or Ta2O5 ,(ii) at least one of ZrO2 or HfO2, and (iii) at least one of Al2O3or REO, and the glass containing not more than 20 percent by weight collectively As2O3, B2O3, GeO2, P2O5, SiO2, TeO2, and V2O5, with the proviso that the glass does not comprise 35.73 percent by weight Al2O3, 42.17 percent by weight La2O3, 17.1 percent by weight ZrO2, and 5 percent by weight of one of Nb2O5 or Ta2O5, based on the total weight of the glass.
Glass collectively comprising at least 97 percent by weight of (i) at least one of Nb2O5 or Ta2O5 and (ii) at least two of (a) Al2O3, (b) REO, or (c) at least one of ZrO2 or HfO2, and the glass containing not more than 3 percent by weight collectively As2O3, B2 O3, GeO2, P2O5, SiO2, TeO2, and V2O5, with the proviso that the glass does not comprise 35.73percent by weight Al2 O3, 42.17 percent by weight La2O3, 17.1 percent by weight ZrO2, and 5 percent by weight of one of Nb2O5 or Ta2O5, based on the total weight of the glass.
Dependencies are inferred from the claim text.