Abstract: A process for transitioning molten glass in a glass furnace from one color to another color while minimizing the production of out-of-color specification transition glass. During the transition, a compensating agent is introduced into the molten glass to adjust the color of the molten glass being discharged from the furnace so that the discharged molten glass meets a target color specification, which effectively results in acceleration of the furnace color change compared to other conventional methods.

Abstract: A process for transitioning molten glass in a glass furnace from one color to another color while minimizing the production of out-of-color specification transition glass. During the transition, a compensating agent is introduced into the molten glass to adjust the color of the molten glass being discharged from the furnace so that the discharged molten glass meets a target color specification, which effectively results in acceleration of the furnace color change compared to other conventional methods.

Abstract: The invention relates to a process for preparing porous glass particles suitable for use as precursor materials for production of an opto-ceramic element. The process comprises: providing particles of a soluble glass composition comprising at least one soluble component, at least one component having low solubility in an aqueous solution, and at least one lasing dopant which also has a low solubility in the aqueous solution; and immersing the particles in an aqueous solution having low solubility for said at least one component and said at least one lasing dopant, to thereby dissolve substantially all of the soluble portions of the glass particles.

Abstract: The invention describes a glass and a glass-ceramic which at least includes the constituents SiO2, Al2O3 and Y2O3 and is preferably doped with rare earth ions. The weight ratio between the weight of Y2O3 and the total weight of SiO2, Al2O3 and Y2O3 is at least 0.2, preferably at least 0.4 or more. The rare earth ions can preferably be incorporated in crystal phases which are precipitated out of glass with a high yttrium content.

Abstract: The invention describes a solid-state light source comprising a solid-state emitter designed for emitting light energy, which preferably has an LED, a luminescent light conversion medium, made from glass or glass ceramics, for converting emitted light energy to light energy of a different frequency spectrum, and a coupling medium for decoupling the light energy to an ambient medium, such as air, the light conversion medium having a refractive index ncs, selected as a function of the refractive index nHL of the solid-state emitter in the range of 0.7·(nHL2)1/3 to 1.3·(nHL2)1/3.

Abstract: To bond bodies with a high thermal stability, a process is provided for bonding two bodies, in which the bodies are joined together using an aluminate-containing solution, and constituents of the aluminate-containing solution are made to react between those surfaces of the bodies which have been joined together.

Abstract: The invention describes a glass and a glass-ceramic which at least includes the constituents SiO2, Al2O3 and Y2O3 and is preferably doped with rare earth ions. The weight ratio between the weight of Y2O3 and the total weight of SiO2, Al2O3 and Y2O3 is at least 0.2, preferably at least 0.4 or more. The rare earth ions can preferably be incorporated in crystal phases which are precipitated out of glass with a high yttrium content. (FIG. 2).

Abstract: A white cold light source uses an LED or a gas discharge lamp and a luminescent rare earth doped glass comprising multiple rare earth cations and a particularly high total rare earth content to generate white light emission. Preferably, the luminescent glass has a 2700K to 7000K black body temperature and color rendering index value exceeding 80. A first embodiment of the glass is composed primarily of P2O5, Al2O3, and alkaline earth and alkali metal oxides, and possesses other properties such as physical and thermal properties that are compatible with conventional melting, forming and other manufacturing steps. Other embodiments of the luminescent glass have a maximum water content of 0.1 wt-% and do not contain any boron. Also the luminescent glass is preferably free of water, boron oxides and nitrides. The luminescent glass can be used as a wavelength converter to produce bright white light emission when pumped by conventional commercially available blue and UV light emitting diode sources.

Abstract: A white cold light source uses an LED or a gas discharge lamp and a luminescent rare earth doped glass comprising multiple rare earth cations and a particularly high total rare earth content to generate white light emission. Preferably, the luminescent glass has a 2700K to 7000K black body temperature and color rendering index value exceeding 80. A first embodiment of the glass is composed primarily of P2O5, Al2O3, and alkaline earth and alkali earth oxides, and possesses other properties such as physical and thermal properties that are compatible with conventional melting, forming and other manufacturing steps. Other embodiments of the luminescent glass have a maximum water content of 0.1 wt-% and do not contain any boron. Also the luminescent glass is preferably free of water, boron oxides and nitrides. The luminescent glass can be used as a wavelength converter to produce bright white light emission when pumped by conventional commercially available blue and UV light emitting diode sources.