Abstract: A glass powder of the present invention is a glass powder, which is formed of alkali borosilicate glass, wherein the glass powder includes 0.1 mol % to 1.0 mol %, provided that 1.0 mol % is excluded, of Li2O+Na2O+K2O in a glass composition, has a molar ratio Li2O/(Li2O+Na2O+K2O) of from 0.35 to 0.65, a molar ratio Na2O/(Li2O+Na2O+K2O) of from 0.25 to 0.55, and a molar ratio K2O/(Li2O+Na2O+K2O) of from 0.025 to 0.20, and has a specific dielectric constant at 25° C. and 16 GHz of from 3.5 to 4.0 and a dielectric dissipation factor at 25° C. and 16 GHz of 0.0020 or less.

Abstract: A glass powder of the present invention is a glass powder, which is formed of alkali borosilicate glass, wherein the glass powder includes 0.1 mol % to 1.0 mol %, provided that 1.0 mol % is excluded, of Li2O+Na2O+K2O in a glass composition, has a molar ratio Li2O/(Li2O+Na2O+K2O) of from 0.35 to 0.65, a molar ratio Na2O/(Li2O+Na2O+K2O) of from 0.25 to 0.55, and a molar ratio K2O/(Li2O+Na2O+K2O) of from 0.025 to 0.20, and has a specific dielectric constant at 25° C. and 16 GHz of from 3.5 to 4.0 and a dielectric dissipation factor at 25° C. and 16 GHz of 0.0020 or less.

Abstract: A composite powder of the present invention includes a glass powder and a ceramic powder, wherein a content of the glass powder is from 30 vol % to 60 vol %, wherein a content of the ceramic powder is from 40 vol % to 70 vol %, wherein the glass powder includes as a glass composition, in terms of mass %, 10% to 30% of SiO2, more than 20% to 40% of B2O3, 20% to 40% of SrO+BaO, 0% to 10% of Al2O3, and 0% to 15% of ZnO, and wherein the composite powder is used for a light reflective substrate.

Abstract: A composite powder of the present invention includes a glass powder and a ceramic powder, wherein a content of the glass powder is from 30 vol % to 60 vol %, wherein a content of the ceramic powder is from 40 vol % to 70 vol %, wherein the glass powder includes as a glass composition, in terms of mass %, 10% to 30% of SiO2, more than 20% to 40% of B2O3, 20% to 40% of SrO+BaO, 0% to 10% of Al2O3, and 0% to 15% of ZnO, and wherein the composite powder is used for a light reflective substrate.

Abstract: An object of the present invention is to provide a light reflective substrate capable of achieving high optical reflectance even though fine particles are not used as a material, and a light emitting device using the same. The light reflective substrate according to the present invention comprises: a glass matrix; and RNb2O6 crystal and/or R4Nb2O9 crystal (R is at least one of Mg, Ca, Sr and Ba) in the glass matrix.

Abstract: The present invention has an object to provide a material with which a light reflective substrate having high optical reflectance can be easily produced. The material for a light reflective substrate according to the present invention comprising a glass powder which does not substantially contain CaO as a composition, and Nb2O5 crystal powder.

Abstract: An object of the present invention is to provide a light reflective substrate capable of achieving high optical reflectance even though fine particles are not used as a material, and a light emitting device using the same. The light reflective substrate according to the present invention comprises: a glass matrix; and RNb2O6 crystal and/or R4Nb2O9 crystal (R is at least one of Mg, Ca, Sr and Ba) in the glass matrix.

Abstract: A dopant host containing, in terms of mole %, 20 to 50% SiO2, 30 to 60% (exclusive of 30%) Al2O3, 10 to 40% B2O3, and 2 to 10% RO, wherein R represents alkaline earth metal, or being a laminate including a boron component volatilization layer containing, in terms of mole %, 30 to 60% SiO2, 10 to 30% Al2O3, 15 to 50% B2O3, and 2 to 10% RO, wherein R represents alkaline earth metal, and a heat resistant layer containing, in terms of mole %, 8 to 30% SiO2, 50 to 85% Al2O3, 5 to 20% B2O3, and 0.5 to 7% RO, wherein R represents alkaline earth metal. A process for producing a boron dopant for a semiconductor including the steps of slurrying a starting material powder containing a boron-containing crystalline glass powder, forming the slurry to prepare a green sheet, and sintering the green sheet.

Abstract: Provided is a dopant host with which the amount of B2O3 volatilized is unlikely to decrease over time and that has good B2O3 volatilizing ability for a long period of time. The dopant host has a laminate that includes a boron component volatilization layer containing 30 to 60 mol % of SiO2, 10 to 30 mol % of Al2O3, 15 to 50 mol % of B2O3, and 2 to 15 mol % of RO (R is an alkaline earth metal) and a heat resistant layer containing 8 to 40 mol % of SiO2, 40 to 85 mol % of Al2O3, 5 to 30 mol % of B2O3, and 0.5 to 7 mol % of RO (R is an alkaline earth metal). At least one outermost layer of the laminate is composed of the boron component volatilization layer. The laminate further includes the boron component volatilization layer inside the laminate. The boron component volatilization layer constituting at least one outermost layer of the laminate has a B2O3 content lower than the B2O3 content in the boron component volatilization layer inside the laminate.

Abstract: A dopant host containing, in terms of mole %, 20 to 50% SiO2, 30 to 60% (exclusive of 30%) Al2O3, 10 to 40% B2O3, and 2 to 10% RO, wherein R represents alkaline earth metal, or being a laminate including a boron component volatilization layer containing, in terms of mole %, 30 to 60% SiO2, 10 to 30% Al2O3, 15 to 50% B2O3, and 2 to 10% RO, wherein R represents alkaline earth metal, and a heat resistant layer containing, in terms of mole %, 8 to 30% SiO2, 50 to 85% Al2O3, 5 to 20% B2O3, and 0.5 to 7% RO, wherein R represents alkaline earth metal. A process for producing a boron dopant for a semiconductor including the steps of slurrying a starting material powder containing a boron-containing crystalline glass powder, forming the slurry to prepare a green sheet, and sintering the green sheet.

Abstract: Disclosed is a phosphor composite material which can be fired at low temperatures and enables to obtain a phosphor composite member which is excellent in weather resistance and reduced in deterioration after long use. Also disclosed is a phosphor composite member obtained by firing such a phosphor composite material. Specifically disclosed is a phosphor composite material composed of a glass powder and a phosphor powder, which is characterized in that the glass powder is composed of SnO—P2O5—B2O3 glass.

Abstract: The present invention has an object to provide a material with which a light reflective substrate having high optical reflectance can be easily produced. The material for a light reflective substrate according to the present invention comprising a glass powder which does not substantially contain CaO as a composition, and Nb2O5 crystal powder.

Abstract: To provide a wavelength conversion member having good surface accuracy and dimensional accuracy even when processed in various shapes, and a method for manufacturing the same. A method for manufacturing a wavelength conversion member, including the steps of: subjecting a preform made of a powder mixture containing a glass powder and an inorganic phosphor powder to heat treatment, thereby obtaining a sintered powder product; and re-press molding the sintered powder product with a die.

Abstract: An object of the present invention is to provide a light reflective substrate capable of achieving high optical reflectance even though fine particles are not used as a material, and a light emitting device using the same. The light reflective substrate according to the present invention comprises: a glass matrix; and RNb2O6 crystal and/or R4Nb2O9 crystal (R is at least one of Mg, Ca, Sr and Ba) in the glass matrix.

Abstract: Provided is a dopant host with which the amount of B2O3 volatilized is unlikely to decrease over time and that has good B2O3 volatilizing ability for a long period of time. The dopant host has a laminate that includes a boron component volatilization layer containing 30 to 60 mol % of SiO2, 10 to 30 mol % of Al2O3, 15 to 50 mol % of B2O3, and 2 to 15 mol % of RO (R is an alkaline earth metal) and a heat resistant layer containing 8 to 40 mol % of SiO2, 40 to 85 mol % of Al2O3, 5 to 30 mol % of B2O3, and 0.5 to 7 mol % of RO (R is an alkaline earth metal). At least one outermost layer of the laminate is composed of the boron component volatilization layer. The laminate further includes the boron component volatilization layer inside the laminate. The boron component volatilization layer constituting at least one outermost layer of the laminate has a B2O3 content lower than the B2O3 content in the boron component volatilization layer inside the laminate.

Abstract: Disclosed is a phosphor composite material which can be fired at low temperatures and enables to obtain a phosphor composite member which is excellent in weather resistance and reduced in deterioration after long use. Also disclosed is a phosphor composite member obtained by firing such a phosphor composite material. Specifically disclosed is a phosphor composite material composed of a glass powder and a phosphor powder, which is characterized in that the glass powder is composed of SnO—P2O5—B2O3 glass.

Abstract: Disclosed is a phosphor composite material which can be fired at low temperatures and enables to obtain a phosphor composite member which is excellent in weather resistance and reduced in deterioration after long use. Also disclosed is a phosphor composite member obtained by firing such a phosphor composite material. Specifically disclosed is a phosphor composite material composed of a glass powder and a phosphor powder, which is characterized in that the glass powder is composed of SnO—P2O5—B2O3 glass.

Abstract: The present invention provides a fluorescent substance composite glass which is chemically stable, has a large size, is reduced in wall thickness, has a uniform thickness and therefore has a high energy conversion efficiency; a fluorescent substance composite glass green sheet and a process for producing the fluorescent substance composite glass. The fluorescent substance composite glass of the present invention is produced by baking a mixture containing a glass powder and an inorganic fluorescent substance powder, in which the energy conversion efficiency to a visible light wavelength region of 380 to 780 nm is 10% or more, when light having an emission peak in a wavelength range of 350 to 500 nm is applied.

Abstract: The present invention provides a fluorescent substance composite glass which is chemically stable, has a large size, is reduced in wall thickness, has a uniform thickness and therefore has a high energy conversion efficiency; a fluorescent substance composite glass green sheet and a process for producing the fluorescent substance composite glass. The fluorescent substance composite glass of the present invention is produced by baking a mixture containing a glass powder and an inorganic fluorescent substance powder, in which the energy conversion efficiency to a visible light wavelength region of 380 to 780 nm is 10% or more, when light having an emission peak in a wavelength range of 350 to 500 nm is applied.

Abstract: To provide a wavelength conversion member having good surface accuracy and dimensional accuracy even when processed in various shapes, and a method for manufacturing the same. A method for manufacturing a wavelength conversion member, including the steps of: subjecting a preform made of a powder mixture containing a glass powder and an inorganic phosphor powder to heat treatment, thereby obtaining a sintered powder product; and re-press molding the sintered powder product with a die.