Abstract: In some examples, a braze material includes a first set of particles, a second set of particles, and a polymeric binder. The first set of particles includes a braze powder, where the braze powder comprises an Si-containing alloy. The first set of particles defines an average or median particle diameter between about 1 ?m and about 40 ?m. The second set of particles includes at least one of SiC or a transition metal carbide, where the second set of particles has a multimodal particle size distribution.

Abstract: An aluminoborate glass composition, including B2O3, Al2O3, P2O5, Na2O, and CaO, as defined herein. Also disclosed are bioactive compositions including the disclosed aluminoborate glass composition, a suitable fluid, and at least one live cell. Also disclosed is method of limiting the amount of boron released into an aqueous solution from a disclosed aluminoborate-containing glass composition as defined herein. Also disclosed is a method of proliferating cells on a bioactive substrate as defined herein.

Abstract: The invention provides an environment-friendly optical glass with excellent negative anomalous dispersion performance and an optical element. The optical glass with excellent negative anomalous dispersion performance contains 0-5% of Nb2O5, exclusive of TiO2 and F, wherein the relative partial dispersion Pg, F of the optical glass is less than 0.57, and the negative anomalous dispersion ?Pg, F is less than and equal to ?0.008. There is no need to add any non-environmentally friendly element into the optical glass provided by the present invention, with the refractive index of 1.60-1.65, the Abbe number of 40-46, and the negative anomalous dispersion ?Pg, F of generally less than ?0.01. Therefore, the optical glass, with excellent negative anomalous dispersion performance and environmental performance, is applicable to be extensively applied to digital camera, digital video, camera phone, etc.

Abstract: A fuel cell stack includes a stack body formed by stacking a plurality of solid oxide fuel cells in a stacking direction. The fuel cell stack includes wall plate members and fuel cell support members. The wall plate members are provided in the stacking direction of the stack body around the sides of the stack body. Each of the fuel cell support members includes a composite layer made of composite material of alumina fiber and vermiculite. The fuel cell support members are interposed between the wall plate members and the sides of the stack body, and apply a load to the sides of the stack body in directions of a separator surface.

Abstract: Disclosed is a lead-free, low melting point glass composition, which is characterized by being substantially free from a lead component and comprising 0-8 mass % of SiO2, 2-12 mass % of B2O3, 2-7 mass % of ZnO, 0.5-3 mass % of RO (MgO+CaO+SrO+BaO), 0.5-5 mass % of CuO, 80-90 mass % of Bi2O3, 0.1-3 mass % of Fe2O3, and 0.1-3 mass % of Al2O3. This glass composition is not easily crystallized at high temperatures and is stable. Therefore, it is useful as an insulating coating material and a sealing material for electronic material substrates.

Abstract: The invention relates to a Nd-doped, aluminate-based or silicate-based, laser glass having a peak emission wavelength that is longer than 1059.7 nm, an emission cross section (?em) of ?1.5×10?20 cm2, and/or an emission bandwidth (??eff) of ?28 nm, while maintaining properties that render the glass suitable for commercial use, such as low glass transition temperature Tg and low nonlinear index, n2.

Abstract: The invention provides an optical glass for press molding which can satisfy all of the following requirements: (1) it contains no environmentally undesirable components; (2) it can easily achieve a low glass transition point; (3) it has a high refractive index and high dispersion; (4) it can easily provide a glass having an excellent visible light transmittance; and (5) it has excellent resistance to devitrification during preparation of a preform. The optical glass for press molding has a refractive index nd of 1.925 or more, an Abbe's number ?d of 10 to 30, and a glass composition, in % by mass, of 20 to 80% Bi2O3, 10 to 30% B2O3, and 0 to 5.5% GeO2 and is substantially free of lead component, arsenic component, and F component.

Abstract: The invention relates to new glass formulations with alumina contents greater than 35 mol % and methods for making these glasses. The glass may be a porous glass or a dense glass.

Abstract: Provided is an optical glass which can satisfy all of the following requirements: (1) it contains no environmentally undesirable components; (2) it can easily achieve a low glass transition point; (3) it has a high refractive index and high dispersion; (4) it can easily provide a glass having a superior visible light transmittance; and (5) it has superior resistance to devitrification during preparation of a preform. The optical glass has a refractive index nd of 2.0 or more, an Abbe's number ?d of 20 or less, a glass transition point of 450° C. or below, and a glass composition, in % by mass, of 70 to 90% Bi2O2, 4 to 29.9% B2O2, 0.1 to 10% Li2O+Na2O+K2O, and 0 to 2.5% SiO2+Al2O2 and is substantially free of lead component, arsenic component, F component, TeO2, and GeO2.

Abstract: A glass ceramic including an alkali metal earth oxide, e.g. SrO suitable for overmolding a RF component provides a good RF response and good mechanical robustness. Specifically, SrO reduces the flow temperature of the ceramic while maintaining the RF and mechanical performance. The resulting glass formulation contains 10-50 mol % SrO, 5-30 mol % Al2O3, and 20-60 mol % B2O3.

Abstract: Disclosed is a method for manufacturing a low melting point nano glass powder. The method includes the steps of: preparing a bismuth-based low melting point glass powder precursor of a micro size, having bismuth (Bi) as the main ingredient; injecting the glass powder precursor into a reaction chamber of a plasma treatment device; applying thermal plasma via a direct current power source to the glass powder precursor injected into the reaction chamber, to vaporize the glass powder precursor; and generating nano glass powder having a nano size by quenching the gas generated by vaporizing the glass powder precursor.

Abstract: An optical glass having high-refractivity and low-dispersion properties and containing, by mol %, 0.1 to 40% of SiO2, 10 to 50% of B2O3, wherein the mass ratio of the content of SiO2 to the content of B2O3, SiO2/B2O3, is 1 or less, 0.5 to 22% of ZnO, 5 to 50% of La2O3, and optionally other ingredients. The optical glass has a refractive index nd of 1.86 to 1.95 and an Abbe's number ?d of (2.36?nd)/0.014 or more but less than 38, and a glass transition temperature of equal to or greater than 640° C.

Abstract: The invention provides an optical glass for press molding which can satisfy all of the following requirements: (1) it contains no environmentally undesirable components; (2) it can easily achieve a low glass transition point; (3) it has a high refractive index and high dispersion; (4) it can easily provide a glass having an excellent visible light transmittance; and (5) it has excellent resistance to devitrification during preparation of a preform. The optical glass for press molding has a refractive index nd of 1.925 or more, an Abbe's number ?d of 10 to 30, and a glass composition, in % by mass, of 20 to 80% Bi2O3, 10 to 30% B2O3, and 0 to 5.5% GeO2 and is substantially free of lead component, arsenic component, and F component.

Abstract: Disclosed is a glass material for press forming providing an optical element having a sufficient optical performance without surface cracks, cloudiness, scratches, and the like even when the glass material contains a highly reactive component. Also disclosed are an optical element having a sufficient optical performance without surface cracks, cloudiness, scratches, and the like and a method for manufacturing the same. Specifically disclosed is a glass material for press forming which comprises a core portion composed of multicomponent optical glass and a surface glass layer covering at least a region serving as an optical functional surface of the core portion. The surface glass layer contains more than 90 mass % of SiO2, and the thickness of the layer is less than five nanometers. Also specifically disclosed is a method for manufacturing a glass optical element by heating the glass material and by press forming the softened glass material using a forming die.

Abstract: The embodiments described herein relate to chemically and mechanically durable glass compositions and glass articles formed from the same. In another embodiment, a glass composition may include from about 70 mol. % to about 80 mol. % SiO2; from about 3 mol. % to about 13 mol. % alkaline earth oxide; X mol. % Al2O3; and Y mol. % alkali oxide. The alkali oxide may include Na2O in an amount greater than about 8 mol. %. A ratio of Y:X may be greater than 1 and the glass composition may be free of boron and compounds of boron. In some embodiments, the glass composition may also be free of phosphorous and compounds of phosphorous. Glass articles formed from the glass composition may have at least a class S3 acid resistance according to DIN 12116, at least a class A2 base resistance according to ISO 695, and a type HGA1 hydrolytic resistance according to ISO 720.

Abstract: Provided is an optical glass which can satisfy all of the following requirements: (1) it contains no environmentally undesirable components; (2) it can easily achieve a low glass transition point; (3) it has a high refractive index and high dispersion; (4) it can easily provide a glass having a superior visible light transmittance; and (5) it has superior resistance to devitrification during preparation of a preform. The optical glass has a refractive index nd of 2.0 or more, an Abbe's number vd of 20 or less, a glass transition point of 450° C. or below, and a glass composition, in % by mass, of 70 to 90% Bi2O2, 4 to 29.9% B2O2, 0.1 to 10% Li2O+Na2O+K2O, and 0 to 2.5% SiO2+Al2O2 and is substantially free of lead component, arsenic component, F component, TeO2, and GeO2.

Abstract: Disclosed is a lead-free, low melting point glass composition, which is characterized by being substantially free from a lead component and comprising 0-8 mass % of SiO2, 2-12 mass % of B2O3, 2-7 mass % of ZnO, 0.5-3 mass % of RO (MgO+CaO+SrO+BaO), 0.5-5 mass % of CuO, 80-90 mass % of Bi2O3, 0.1-3 mass % of Fe2O3, and 0.1-3 mass % of Al2O3. This glass composition is not easily crystallized at high temperatures and is stable. Therefore, it is useful as an insulating coating material and a sealing material for electronic material substrates.

Abstract: An object of the present invention is to provide optical glass having improved glass-devitrification resistance and moldability without causing reduction in refractive index, and also provide an optical element using the optical glass as a raw material. Specifically, the present invention provides an optical glass containing components of, by mol %: B2O3: over 60% through 75%; Bi2O3: 24% to 39%; La2O3: 7% or lower; Gd2O3: 7% or lower; and ZrO2: 7% or lower.

Abstract: A glass composition having high refractive index, softening property at low temperature and small average thermal expansion coefficient, and a member provided with the composition on a substrate, are provided. The glass composition of the present invention has a refractive index (nd) of from 1.88 to 2.20, a glass transition temperature (Tg) of from 450 to 490° C., and an average thermal expansion coefficient at temperatures from 50° C. to 300° C. (?50-300) of from 60×10?7/K to 90×10?7/K, and includes Bi2O3 in an amount of from 5 to 25% in terms of mol % on the basis of oxides.

Abstract: The invention relates to a new class of luminescent substances (phosphorous) based on an universally dopable matrix made of an amorphous, at the most partially crystalline network of the elements P, Si, B, Al and N, preferably the composition Si3B3N7. Optical excitation and emission can be varied in this system over the entire practically relevant field by incorporation of any cationic activators, alone or in combination, but also by incorporation of oxygen as anionic component. This opens up the entire spectrum of use of luminescent substances, such as illumination systems or electronic screens.

Abstract: An aspect of the present invention relates to optical glass, which is oxide glass comprising various cationic components in prescribed amounts without Pb, with a refractive index nd of 1.750 to 1.850, an Abbé number ?d of 29.0 to 40.0, and a glass transition temperature of less than 630° C.

Abstract: A compositional range of high strain point alkali metal free, silicate, aluminosilicate and boroaluminosilicate glasses are described herein. The glasses can be used as substrates for photovoltaic devices, for example, thin film photovoltaic devices such as CIGS photovoltaic devices. These glasses can be characterized as having strain points ?570° C., thermal expansion coefficient of from 5 to 9 ppm/° C.

Abstract: A high-refractivity low-dispersion optical glass that can be stably supplied and has excellent glass stability and that has coloring reduced, comprises, by mass %, 5 to 32% of total of SiO2 and B2O3, 45 to 65% of total of La2O3, Gd2O3 and Y2O3, 0.5 to 10% of ZnO, 1 to 20% of total of TiO2 and Nb2O5, 0 to 15% of ZrO2, 0 to 2% of WO3, 0 to 20% of Yb2O3, 0 to 10% of total of Li2O, Na2O and K2O, 0 to 10% of total of MgO, CaO, SrO and BaO, 0 to 12% of Ta2O5, 0 to 5% of GeO2, 0 to 10% of Bi2O3, and 0 to 10% of Al2O3, wherein the mass ratio of the content of SiO2 to the content of B2O3, (SiO2/B2O3), is from 0.3 to 1.0, and the mass ratio of the total content of Gd2O3 and Y2O3 to the total content of La2O3, Gd2O3 and Y2O3, (Gd2O3+Y2O3)/(La2O3+Gd2O3+Y2O3), is from 0.05 to 0.6, the optical glass having a refractive index nd of 1.89 to 2.0 and an Abbe's number ?d of 32 to 38 and having a coloring degree ?70 of 430 nm or less.

Abstract: The lead-free and fluorine-free optical glass has a refractive index of 1.60?nd?1.64 and an Abbe number of from 56?vd?64, a transformation temperature less than or equal to 590° C., can be precise pressed and is stable to cystallization. The glass has the following, composition (in weight-% based on oxide content. P2O5, 26-35; B2O3, 10-15; Al2O3, 5.5-10; BaO, 25-37; SrO, 0-6; CaO, 8-15; ZnO, 3-10; Bi2O3, 0-8; Na2O, 0-2; K2O, 0-2; WO3, 0-10; La2O3, 0-2; Nb2O5, 0-1; TiO2,0-<1; ? alkaline earth metal oxides ?40; ? alkali metal oxides, 0-2 and at least one fining agent, 0-0.5.

Abstract: Optical glass having a refractive index (nd) of 1.85 or greater, and an Abbe number (?d) falling within the range of 10 to 30, which is suited for molding by precision mold press is provided. The optical glass is characterized by including B2O3+SiO2 in an amount of 3 to 60%, Bi2O3 in an amount of 25 to 80%, RO+Rn2O in an amount of 5 to 60% (wherein R represents one or more selected from a group consisting of Zn, Ba, Sr, Ca, and Mg; and Rn represents one or more selected from a group consisting of Li, Na, K, and Cs), with each component in the range expressed in oxide-based mole percentage, and is characterized in that transparency in the visible region is high, and that the transition point (Tg) is 480° C. or lower. The optical glass is characterized by having a spectral transmittance of 70% or greater at a wavelength of 600 nm for a thickness of 10 mm.

Abstract: Provided is a glass composition for electrode formation including, as a glass composition expressed in terms of oxides by mass %, 73.1 to 90% of Bi2O3, 2 to 14.5% of B2O3, 0 to 25% of ZnO, 0.2 to 20% of MgO+CaO+SrO+BaO (total content of MgO, CaO, SrO, and BaO) , and 0 to 8.5% of SiO2+Al2O3 (total content of SiO2 and Al2O3).

Abstract: To provide a substrate for information recording medium having various properties, in particular higher fracture toughness, required for application of the substrate for information recording medium of the next generation such as perpendicular magnetic recording system, etc. and a material with excellent workability for such purpose. A crystallized glass substrate for information recording medium, consisting of a crystallized glass which comprises one or more selected from RAl2O4 and R2TiO4 as a main crystal phase, in which R is one or more selected from Zn, Mg and Fe, and in which the main crystal phase has a crystal grain size in a range of from 0.5 nm to 20 nm, a degree of crystallinity of 15% or less, and a specific gravity of 3.00 or less.

Abstract: A glass composition being suitable for precision mold press forming, having superior resistance to devitrification, having optical constants (a refractive index, an Abbe number, and the like) required for aspherical lenses, and a low glass transition temperature. There is provided an optical glass comprising 5 mol % to 60 mol % of a B2O3 component, and 0.2 mol % to 60 mol % of a TeO2 component, by mol % on the basis of oxides. Further, there is provided an optical glass mentioned above having optical constants with a refractive index (nd) of 1.80 to 2.20, and an Abbe number (?d) of 16 to 40. Still further, there is provided an optical glass mentioned above having a glass transition temperature (Tg) of no more than 680° C.

Abstract: There is provided a glass ceramic material for plasma display, in which glass fine grains (A) having a softening point of 570-640° C. are in 40-70 wt %, and glass fine grains (B) having a softening point of 480-540° C. are in 30-60 wt %, the glass ceramic material for plasma display being characterized in that the glass fine grains (A) comprise 2-12 wt % of SiO2, 50-58 wt % of B2O3, 10-20 wt % of Al2O3, 0-6 wt % of ZnO, 0-2.8 wt % of Li2O, and 10-22 wt % of at least one selected from MgO, CaO, SrO and BaO and that refractive index of the glass fine grains (A) is 1.53-1.56.

Abstract: Provided is a precision press-molding optical glass that is not easily degraded in quality by the occurrence of an altered layer such as fogging or yellowing on a surface and that comprises B2O3, ZnO, La2O3 and ZrO2 and contains, by mol %, 0 to less than 0.5% of Li2O, 20 to 50% of B2O3, 0 to 20% of SiO2, 22 to 42% of ZnO, 5 to 24% of La2O3, 0 to 20% of Gd2O3, provided that the total content of La2O3 and Gd2O3 is 10 to 24%, 0.5 to 10% of ZrO2, 0 to 15% of Ta2O5, 0 to 20% of WO3, 0 to 15% of Nb2O5, 0 to 20% of TiO2, 0 to 10% of Bi2O3, 0 to 10% of GeO2, 0 to 10% of Ga2O3, 0 to 10% of Al2O3, 0 to 10% of BaO, 0 to 10% of Y2O3 and 0 to 10% of Yb2O3, the optical glass having an Abbe's number (?d) of at least 35 but less than 40.

Abstract: A non-lead optical glass consisting essentially of, as represented by mol %, from 45 to 75% of Bi2O3, from 12 to 45% of B2O3, from 1 to 20% of Ga2O3, from 1 to 20% of In2O3, from 0 to 20% of ZnO, from 0 to 15% of BaO, from 0 to 15% of SiO2+Al2O3+GeO2, from 0 to 15% of MgO+CaO+SrO, from 0 to 10% of SnO2+TeO2+TiO2+ZrO2+Ta2O3+Y2O3+WO3 and from 0 to 5% of CeO2, wherein Ga2O3+In2O3+ZnO?5%. An optical fiber comprising the above non-lead optical glass as a core.

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: The present invention is to provide glass exhibiting both of a low thermal expansion and a low-temperature melting property and to provide glass which is able to be manufactured under the condition where an average linear thermal expantion coefficient at 0° C. to 50° C. is preferably not less than 40×10?7° C.?1, more preferably 35×10?7° C.?1 and, most preferably, 33×10?7° C.?1 and a fusing temperature is preferably not higher than 1550° C., more preferably not higher than 1540° C. and, most preferably, not higher than 1530° C. The means therefor is the glass, characterized in that, where an average linear thermal expantion coefficient at 0° C. to 50° C. is not more than 40×10?7° C.?1, an Al2O3 component and a B2O3 component on the basis of oxides are contained and the ratio of B2O3/Al2O3 in terms of % by mass is not less than 0.8.

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

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: A low melting glass, which contains substantially no lead and contains 70-90% of Bi2O3, 1-20% of ZnO, 2-12% of B2O3, 0.1-5% of Al2O3, 0.1-5% of CeO2, 0-5% of CuO, 0-0.2% of Fe2O3 and 0.05-5% of CuO+Fe2O3 in mass %, wherein a content of alkali metal oxides in the glass composition is less than 0.1%, and the glass does not crystallize by pre-baking at a sealing temperature or more, can be used for sealing later, and can suppress deterioration of a material such as platinum or platinum-rhodium to provide a stable melting operation for a long period.

Abstract: Ceramics comprising (i) at least one of Nb2O5 or Ta2O5 and (ii) at least two of (a) Al2O3, (b) Y2O3, 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: 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: An optical glass which contains at least 20 mol % of TeO2 and has an internal transmittance of at least 80% in a thickness of 2 mm to a light having a wavelength of 405 nm and a refractive index of at least 1.85 to the same light, and which contains no alkali metal oxide or contains alkali metal oxides in a total amount of at most 15 mol %.

Abstract: The invention relates to uses of glasses and glass-ceramics in dental and orthodontic applications.

Abstract: A material usable for the electrodes and the dielectric layer plasma display panels and capable of reducing the occurrence of yellowing and a high-image-quality plasma display panel using the material are provided. Using glass powder containing 25 to 50 wt % of Bi2O3, 5 to 35 wt % of B2O3, 10 to 20 wt % of ZnO, 5 to 20 wt % of BaO, 0 to 15 wt % of SiO2 and 0 to 10 wt % of Al2O3, the electrodes and the dielectric layer of a plasma display panel are formed.

Abstract: A family of tellurite glasses and optical components for telecommunication systems, the glasses consisting essentially of, as calculated in cation percent, 65-97% TeO2, and at least one additional oxide of an element having a valence greater than two and selected from the group consisting of Ta, Nb, W, Ti, La, Zr, Hf, Y, Gd, Lu, Sc, Al and Ga, that may contain a lanthanide oxide as a dopant, in particular erbium oxide, and that, when so doped, is characterized by a fluorescent emission spectrum having a relatively broad FWHM value.

Abstract: A glass fiber comprising core glass and clad glass, wherein the core glass consists essentially of from 25 to 70 mol % of Bi2O3, from 5 to 74.89 mol % of B2O3+SiO2, from 0.1 to 30 mol % of Al2O3+Ga2O3, and from 0 to 10 mol % of CeO2.

Abstract: An optical amplifying glass having Er doped in an amount of from 0.01 to 10% as represented by mass percentage to a matrix glass comprising, by mol %, BiO2: 20 to 80, B2O3+SiO2: 5 to 75, Ga2O3+WO3+TeO2: 0.1 to 35, Al2O3≦10, GeO2≦30, TiO2≦30, and SnO2≦30, and containing no CeO2.

Abstract: A glass for press molding, containing substantially no lead, consisting substantially of, as represented by mol % based on oxides: 1 Bi2O3 25 to 70%, B2O3 + SiO2  5 to 75%, CeO2  0 to 10%, Al2O3  0 to 20%, Ga2O3  0 to 20%, Al2O3 + Ga2O3  0 to 30%, and ZnO + TeO2 + BaO + WO3  0 to 40%,

Abstract: A dielectric material comprising: a glass powder constituted of a glass comprising Si, B and an alkali metal element, the glass being amorphous in sintering at a temperature of 1,050° C. or lower; and a ceramic filler comprising at least one member of SiO2, Al2O3 and 3Al2O3.2Si2, and an alkali metal element, wherein when a total sum of Si converted into SiO2, B converted into B2O3 and the alkali metal element converted into A2O, wherein A represents an alkali metal element, all of which are contained in the glass, is 100 mole %, the content of the alkali metal element converted into A2O, which is contained in the glass, is 0.5 mole % or less; and when a total sum of at least one member of SiO2, Al2O3 and 3Al2O3.2SiO2, and the alkali metal element converted into A2O, all of which are contained in the ceramic filler, is 100 mole %, a content of the alkali metal element converted into A2O, which is contained in the ceramic filler, is 0.5 mole % or less.

Abstract: 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: Alumina-zirconia materials 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-rare earth oxide-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: 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.