Abstract:
The present invention provides an alkali-free glass sheet, including as a glass composition, in terms of mol %, 60% to 74% of SiO2, 6% to 20% of Al2O3, 0% to 9% of B2O3, 1% to 13% of MgO, 1% to 13% of CaO, 0% to 7% of SrO, 0% to 8% of BaO, and 0% to less than 1.0% of Y2O3+La2O3, being substantially free of an alkali metal oxide, and having a strain point of 650° C. or more.
Abstract:
Provided is a method for manufacturing a wavelength conversion member by which unevenness in luminescent color are less likely to occur. A method for manufacturing a wavelength conversion member includes the steps of: preparing a slurry containing glass particles to be a glass matrix 2 and phosphor particles 3; forming a green sheet by applying the slurry onto a support substrate and moving a doctor blade relative to the slurry, the doctor blade being spaced a predetermined distance away from the support substrate; forming a green sheet laminate by applying heat and pressure to a plurality of the green sheets overlaid one upon another; and sintering the green sheet laminate to obtain a wavelength conversion member, wherein in the step of forming a green sheet laminate, the plurality of green sheets are overlaid one upon another so that, as for at least two of the plurality of green sheets, respective directions of movement of the doctor blade in the step of forming a green sheet intersect each other.
Abstract:
Provided is a wavelength conversion member that is less likely to cause deformation or breakage due to thermal expansion and has an excellent light extraction efficiency. A wavelength conversion member 1 that converts a wavelength of excitation light 11 emitted from a light source includes: a container 2 having a frame-shaped sidewall 4; a phosphor layer 6 disposed in the container 2 and containing a resin and a phosphor; a cover member 5 disposed over the sidewall 4 of the container 2 and sealing an interior of the container 2; and a sealing material layer 9 disposed between the sidewall 4 of the container 2 and the cover member 5, wherein the phosphor layer 6 and the cover member 5 are in close contact with each other, and a cavity 10 surrounded by the phosphor layer 6, the cover member 5, and the sealing material layer 9 is provided over the sidewall 4 of the container 2.
Abstract:
Provided is a tempered glass which is suitable for protection of a display or the like and allows transmission of an infrared ray having a wavelength of from 5 μm to 20 μm. The tempered glass has a compressive stress layer on its surface and has formed therein a through hole penetrating through the tempered glass so as to pass through the surface.
Abstract:
A glass article includes a glass composition including mole percent (mol %) to 70 mol % of SiO2, 5 mol % to 15 mol % of Al2O3, 5 mol % to 15 mol % of Na2O, greater than 0 mol % and equal to or less than 5 mol % of K2O, 5 mol % to 15 mol % of Li2O, and greater than 0 mol % and equal to or less than 5 mol % of MgO, and satisfying Relation (1) below: 0.1≤Al2O3/(sum of Na2O,K2O, and Li2O)≤0.7 (1), where Al2O3, Na2O, K2O, and Li2O in the Relation (1) denote contents (mol %) of Al2O3, Na2O, K2O, and Li2O, respectively, in the glass composition, and the glass article has a thickness of 100 micrometers (μm) or less.
Abstract:
Provided is a wavelength conversion member that can be readily adjusted in chromaticity and can be increased in productivity and a production method for the wavelength conversion member. A wavelength conversion member 1 having a first principal surface 1a and a second principal surface 1b opposed to each other includes a glass matrix 2 and phosphor particles 3 disposed in the glass matrix 2, wherein concentrations of the phosphor particles 3 in the first principal surface 1a and in the second principal surface 1b are higher than concentrations of the phosphor particles 3 in surface layer bottom planes 1c and 1d located 20 μm inward from the first principal surface 1a and 20 μm inward from the second principal surface 1b, respectively.
Abstract:
Provided is a wavelength conversion member that is less decreased in luminescence intensity with time by irradiation with light of an LED or LD and a light emitting device using the wavelength conversion member. A wavelength conversion member is formed of an inorganic phosphor dispersed in a glass matrix, wherein the glass matrix contains, in % by mole, 30 to 85% SiO2, 0 to 20% B2O3, 0 to 25% Al2O3, 0 to 3% Li2O, 0 to 3% Na2O, 0 to 3% K2O, 0 to 3% Li2O+Na2O+K2O, 0 to 35% MgO, 0 to 35% CaO, 0 to 35% SrO, 0 to 35% BaO, 0.1 to 45% MgO+CaO+SrO+BaO, and 0 to 4% ZnO, and the inorganic phosphor is at least one selected from the group consisting of an oxide phosphor, a nitride phosphor, an oxynitride phosphor, a chloride phosphor, an oxychloride phosphor, a halide phosphor, an aluminate phosphor, and a halophosphate phosphor.
Abstract:
A tempered glass has a compressive stress layer in a surface thereof, includes as a glass composition, in terms of mass %, 50 to 80% of SiO2, 10 to 30% of Al2O3, 0 to 6% of B2O3, 0 to 2% of Li2O, and 5 to 25% of Na2O, and is substantially free of As2O3, Sb2O3, PbO, and F.
Abstract:
Provided is a glass substrate for an OLED device, including a roughened surface having a surface roughness Rt of 50 to 10,000 nm as at least one surface thereof, the glass substrate for an OLED device having a refractive index nd of 1.55 or more.
Abstract:
An object is to devise a tempered glass substrate that has high mechanical strength and hardly undergoes breakage even though having a large size. A tempered glass substrate has a compressive stress layer in a surface thereof, and includes 1 piece/cm3 or less of devitrified stones containing Zr.