Provided is a wavelength conversion member which is made of a phosphor powder dispersed in a glass matrix and has an excellent luminous efficiency. A wavelength conversion member is comprising: a phosphor powder dispersed in a glass matrix, wherein the glass matrix has a refractive index (nd) of 1.6 or more and a liquidus temperature of 1070? C. or below.

In a known composite material with a fused silica matrix there are regions of silicon-containing phase embedded. In order to provide a composite material which is suitable for producing components for use in high-temperature processes for heat treatment even when exacting requirements are imposed on impermeability to gas and on purity, it is proposed in accordance with the invention that the composite material be impervious to gas, have a closed porosity of less than 0.5% and a specific density of at least 2.19 g/cm.sup.3, and at a temperature of 1000 C. have a spectral emissivity of at least 0.7 for wavelengths between 2 and 8 m.

A photosensitive glass paste contains a photosensitive organic component and an inorganic component containing a glass powder having a high softening point, a glass powder having a low softening point, and a ceramic filler. The ceramic filler has a thermal expansion coefficient of 1010.sup.6/ C. to 1610.sup.6/ C., the inorganic component contains 30% to 50% by volume of the ceramic filler, and the inorganic component contains 0.5% to 10% by volume of the glass powder having a low softening point.

Provided are: a production method for a patterned phosphorescent body capable of producing a patterned phosphorescent body with excellent light emission (phosphorescent) performance through simple and easy production processes; a patterned phosphorescent body, and an evacuation guide sign. A mixture obtained by mixing at least a phosphorescent material and a glass material is filled in a mold and the mixture is press-molded so as to provide a planar part (10), thereby to create a molded body. The molded body is baked and slowly cooled, and then transfer paper of a water transfer type is attached to a surface of the planar part (10) of the baked molded body (4) and re-baking is performed at a temperature lower than a baking temperature of the molded body to impress a pattern (11) on the transfer paper.

The present invention relates to a process for producing a color-graded blank for dental restorations by way of a sedimentation process, to a blank obtained by the process according to the invention and to the use of a suspension for producing a color-graded dental restoration. The method comprises: a) providing a suspension comprising i) a liquid dispersant and ii) a base material and iii) one or more coloring substances; b) partial sedimentation with the formation of a sediment having a color gradient and a suspension supernatant; c) optionally completely or partially removing the suspension supernatant; d) adding a suspension comprising coloring substances, which suspension differs from the suspension in step a); e) sedimentation or partial sedimentation with the formation of a sediment having a color gradient and a suspension supernatant; f) optionally repeating steps c) and d) or step d) one or more times; g) solidifying the sediment with the formation of a color-graded blank.

Embodiments are directed to glass frits containing phosphors that can be used in LED lighting devices and for methods associated therewith for making the phosphor containing glass frit and their use in glass articles, for example, LED devices.

A conversion material for a white or colored light source is provided. The material includes a matrix glass that, as bulk material, for a thickness of about 1 mm, has a pure transmission of greater than 80% in the wavelength region from 350 to 800 nm and in the region in which the primary light source emits light, wherein the sum of transmission and reflection of the sintered matrix glass without luminophore is at least greater than 80% in the spectral region from 350 nm to 800 nm and in the spectral region in which the primary light source emits light.

A multilayer body includes a multilayer structure including a glass ceramic layer including a glass and a filler and a ferrite layer including a ferrite, in which the glass ceramic layer has a glass content of about 30.0% or more by weight and about 80.0% or less by weight and a filler content of about 20.0% or more by weight and about 70.0% or less by weight, the glass included in the glass ceramic layer includes about 0.5% or more by weight and about 5.0% or less by weight R.sub.2O (R represents at least one selected from the group consisting of Li, Na, and K), about 0% or more by weight and about 5.0% or less by weight Al.sub.2O.sub.3, about 10.0% or more by weight and about 25.0% or less by weight B.sub.2O.sub.3, and about 70.0% or more by weight and about 85.0% or less by weight SiO.sub.2 based on the total weight of the glass, and the filler included in the glass ceramic layer includes at least one of SiO.sub.2 and Al.sub.2O.sub.3 and also includes about 5.0% or more by weight and about 15.0% or less by weight of a ferrite based on the total weight of the glass and the filler.

According to embodiments disclosed herein, light-scattering laminated glass articles may include a first glass layer, a second glass layer, and a light-scattering component. The first glass layer may be formed from a first glass composition. The second glass layer may be formed from a second glass composition and fused to the first glass layer. The light-scattering component may be disposed at an interface of the first glass layer and the second glass layer. The light-scattering component may include a different composition or material phase than the first glass layer and the second glass layer. Also disclosed herein are methods for producing light-scattering laminated glass articles.

In a known composite material with a fused silica matrix there are regions of silicon-containing phase embedded. In order to provide a composite material which is suitable for producing components for use in high-temperature processes for heat treatment even when exacting requirements are imposed on impermeability to gas and on purity, it is proposed in accordance with the invention that the composite material be impervious to gas, have a closed porosity of less than 0.5% and a specific density of at least 2.19 g/cm.sup.3, and at a temperature of 1000 C. have a spectral emissivity of at least 0.7 for wavelengths between 2 and 8 m.