Abstract: Disclosed herein is an article having: coalesced first and second glasses, wherein: the first glass has at least two different metal oxides, wherein the first glass has a Tg1 and Tx1, and wherein the difference between the Tg1 and the Tx1 is at least 5K, the first glass having less than 20% by weight SiO2, less than 20% by weight B2O3, and less than 40% by weight P2O5; and the second glass has at least two different metal oxides, wherein the second glass has a Tg2 and Tx2, and wherein the difference between the Tg2 and the Tx2 is at least 5K, the second glass having less than 20% by weight SiO2, less than 20% by weight B2O3, and less than 40% by weight P2O5.

Abstract: Presently described are retroreflective articles, such as pavement markings, that comprise transparent microspheres partially embedded in a (e.g., polymeric) binder. Also described are (e.g., glass-ceramic) microspheres, methods of making microspheres, as well as compositions of glass materials and compositions of glass-ceramic materials. The microspheres generally comprise lanthanide series oxide(s), titanium oxide (TiO2), and optionally zirconium oxide (ZrO2).

Abstract: Presently described are retroreflective articles, such as pavement markings, that comprise transparent microspheres partially embedded in a (e.g., polymeric) binder. Also described are (e.g., glass-ceramic) microspheres, methods of making microspheres, as well as compositions of glass materials and compositions of glass-ceramic materials. The microspheres generally comprise lanthanide series oxide(s), titanium oxide (TiO2), and optionally zirconium oxide (ZrO2).

Abstract: Presently described are retroreflective articles, such as pavement markings, that comprise transparent microspheres partially embedded in a (e.g. polymeric) binder. Also described are (e.g. glass-ceramic) microspheres, methods of making microspheres, as well as compositions of glass materials and compositions of glass-ceramic materials. The microspheres generally comprise lanthanide series oxide(s), titanium oxide (TiO2), and optionally zirconium oxide (ZrO2).

Abstract: Amorphous materials, glass-ceramics and methods of making the same. Embodiments of the invention include abrasive particles. The abrasive particles can be incorporated into a variety of abrasive articles, including bonded abrasives, coated abrasives, nonwoven abrasives, and abrasive brushes.

Abstract: Al2O3—Y2O3—ZrO2/HfO2 ceramics (including glasses, crystalline ceramics, and glass-ceramics) and methods of making the same. 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. The particles and fibers are useful, for example, as thermal insulation, filler, or reinforcing material in composites (e.g., ceramic, metal, or polymeric matrix composites). The thin coatings can be useful, for example, as protective coatings in applications involving wear, as well as for thermal management. Certain ceramic particles according to the present invention can be are particularly useful as abrasive particles.

Abstract: A method of making a glass-ceramic from at least two different metal oxides is disclosed. The method includes providing the two different metal oxides as a glass, heating the glass above the glass transition temperature of the glass to form a coalesced shape; and heating the coalesced shape to a temperature above the crystallization onset temperature of the glass, thereby forming a glass-ceramic comprising at least 1% by volume crystallites, wherein the crystallites have an average size of less than 1 micrometer. The difference between the glass transition temperature and the crystallization onset temperature is at least 25K.

Abstract: A method of making an article from an aluminum oxide glass is disclosed. The aluminum oxide glass includes zirconium oxide and either calcium oxide or strontium oxide. The aluminum oxide glass has a glass transition temperature and a crystallization temperature, and these temperatures differ by at least 25K. The method includes: providing a glass in a form comprising particles, beads, microspheres, or fibers; heating the glass above the Tg such that the particles, beads, microspheres, or fibers coalesce to form a coalesced shape; and cooling the coalesced shape to form the article.

Abstract: A method of making an article from an aluminum oxide glass is disclosed. The aluminum oxide glass includes a rare earth oxide. The aluminum oxide glass has a glass transition temperature and a crystallization temperature, and these temperatures differ by at least 25K. The method includes: providing a glass in a form comprising particles, beads, microspheres, or fibers; heating the glass above the Tg such that the particles, beads, microspheres, or fibers coalesce to form a coalesced shape; and cooling the coalesced shape to form the article.

Abstract: Abrasive particles comprising alpha alumina particles and methods of making the same. The abrasive particles can be incorporated into a variety of abrasive articles, including bonded abrasives, coated abrasives, nonwoven abrasives, and abrasive brushes.

Abstract: Abrasive particles and methods of making the same. Embodiments of the invention can be used to make abrasive particles. The abrasive particles can be incorporated into a variety of abrasive articles, including bonded abrasives, coated abrasives, nonwoven abrasives, and abrasive brushes.

Abstract: Method of making an article, the method comprising coalescing a plurality of the glass particles. Examples of articles include kitchenware (e.g., plates), dental brackets, and reinforcing fibers, cutting tool inserts, abrasives, and structural components of gas engines, (e.g., valves and bearings).

Abstract: Method of making an article, the method comprising coalescing a plurality of the glass particles. The article may comprise glass, glass-ceramic, and/or crystalline ceramic. Examples of articles include kitchenware (e.g., plates), dental brackets, and reinforcing fibers, cutting tool inserts, abrasives, and structural components of gas engines, (e.g., valves and bearings).

Abstract: An LED extractor has an input surface adapted to optically couple to an emitting surface of an LED die, and is composed of a glass (including a glass-ceramic) material whose refractive index is at least 2, or at least 2.2.

Abstract: Ceramic materials and articles comprising at least 35 percent by weight Al2O3, and a plurality of cells having an average cell size of less than 3 micrometers.

Abstract: Fused abrasive particles comprising eutectic material. The fused abrasive particles can be incorporated into abrasive products such as coated abrasives, bonded abrasives, non-woven abrasives, and abrasive brushes.

Abstract: Ceramics (including glasses and glass-ceramics) comprising nitrogen, and methods of making the same.

Abstract: A glass-ceramic and methods for making glass-ceramics that exhibit a combination of high hardness and high in-line transmission.

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.

Abstract: Methods for making glass-ceramics comprising Al2O3, REO, at least one of ZrO2 or HfO2 and at least one of Nb2O5 or Ta2O5. 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.