Abstract: To provide a reflective frame for a light-emitting element, which can be preferably used for a light-emitting device having a metal member on which a light-emitting element is mounted, whereby the light extraction efficiency, the reliability and the productivity, etc. can be improved. A reflective frame for a light-emitting element, which is made of a sintered body comprising a glass material and a ceramic powder; and the sintered body is one fired at at most 900° C. and has a porosity of at most 15% and an average reflectance at a wave length of from 400 to 700 nm being at least 86% when the thickness is 1 mm.

Abstract: A substrate for mounting a light-emitting element, containing a substrate main body having a mounting surface on which a light-emitting element is to be mounted, a reflection layer formed on a part of the mounting surface of the substrate main body and containing silver to reflect light emitted from the light-emitting element, and a vitreous insulating layer formed on the reflection layer, wherein the vitreous insulating layer contains a glass containing SiO2, at least one of Al2O3 and B2O3, and at least one member selected from Li2O, Na2O and K2O, wherein (Li2O+Na2O+K2O)—Al2O3 is from ?20 to 1.5% and Si02+3×Al2O3 is at most 90% calculated using the mol % of each of said SiO2, Al2O3 B2O3, Li2O, Na2O and K2O in said glass.

Abstract: To provide a glass containing little B2O3, whereby when its powder is fired, its thermal expansion curve does not have an inflection point, a non-lead glass is provided containing, as represented by mol % based on the following oxides, from 35 to 41.5% of SiO2, from 8 to 25% of MgO, more than 27 to 35% of CaO, from 0 to 2% of SrO, from 0 to 4% of BaO, from 5 to 15% of ZnO and from 4.5 to 10% of Al2O3, wherein the total content of these components is at least 97%, and when SrO and BaO are contained, the total content of SrO and BaO is at most 2%; as well as a non-lead glass containing, as represented by mol % based on the following oxides, from 39.5 to 41.5% of SiO2, from 10 to less than 13% of MgO, from 18 to 22% of CaO, more than 12 to 15% of SrO, from 0 to 1% of BaO, from 6 to 11% of ZnO and from 4.5 to 7% of Al2O3, wherein the total content of these components is at least 97%.

Abstract: To provide a substrate for mounting a light-emitting element, which is provided with a reflection layer having a high optical reflectance and being less susceptible to deterioration of the reflectance due to corrosion and which has an improved light extraction efficiency and heat dissipation property, and a light-emitting device employing such a substance. A substrate for mounting a light-emitting element, which comprises a substrate main body having a mounting surface on which a light-emitting element is to be mounted, a reflection layer formed on a part of the mounting surface of the substrate main body and containing silver, and a vitreous insulating layer formed on the reflection layer and composed of glass and a ceramic filler, wherein the vitreous insulating layer has a surface swell of at most 5 ?m in a span of 300 ?m.

Abstract: To provide a substrate for a light-emitting device, which is provided with a reflection layer having a high optical reflectance and being less susceptible to deterioration of the reflectance due to corrosion and which has an improved light extraction efficiency, and a light-emitting device employing such a substrate.

Abstract: Glass for covering electrodes, which consists essentially of, as represented by mol % based on the following oxides, from 25 to 60% of B2O3, from 0 to 18% of SiO2, from 0 to 60% of ZnO, from 0 to 18% of BaO, from 3 to 15% of Bi2O3 and from 0 to 10% of Al2O3, and contains no PbO.

Abstract: To provide a glass containing little B2O3, whereby when its powder is fired, its thermal expansion curve does not have an inflection point. Non-lead glass comprising, as represented by mol % based on the following oxides, from 35 to 41.5% of SiO2, from 8 to 25% of MgO, more than 27 to 35% of CaO, from 0 to 2% of SrO, from 0 to 4% of BaO, from 5 to 15% of ZnO and from 4.5 to 10% of Al2O3, wherein the total content of these components is at least 97%, and when SrO and BaO are contained, the total content of SrO and BaO is at most 2%. Non-lead glass comprising, as represented by mol % based on the following oxides, from 39.5 to 41.5% of SiO2, from 10 to less than 13% of MgO, from 18 to 22% of CaO, more than 12 to 15% of SrO, from 0 to 1% of BaO, from 6 to 11% of ZnO and from 4.5 to 7% of Al2O3, wherein the total content of these components is at least 97%.

Abstract: Glass for covering electrodes, which consists esentially of, as represented by mol % based on the following oxides, from 25 to 60% of B2O3, from 0 to 18% of SiO2, from 0 to 60% of ZnO, from 0 to 18% of BaO, from 3 to 15% of Bi2O3 and from 0 to 10% of Al2O3, and contains no PbO.

Abstract: Non-lead glass consisting essentially of, as represented by mol %, from 20 to 50% of B2O3, from 5 to 35% of SiO2, from 10 to 30% of ZnO, from 0 to 10% of Al2O3, from 0 to 10% of SrO, from 6 to 16% of BaO, from 2 to 16% of Li2O, from 0 to 10% of Na2O+K2O, from 0 to 9% of Bi2O3, and from 0 to 2% of CuO+CeO2, wherein (B2O3+SiO2+Al2O3)/(Bi2O3+BaO) is at least 3.25, and MgO+CaO is at most 8 mol %. Further, a plasma display device wherein transparent electrodes formed on a glass substrate constituting a front substrate, or electrodes formed on a glass substrate constituting a rear substrate, are covered by the non-lead glass.

Abstract: A low melting point glass for covering electrodes, consisting, as represented by mass percentage based on the following oxides, essentially of: Mass percentage PbO 20 to 60%, Bi2O3  0 to 30%, B2O3 20 to 55%, SiO2  0 to 10%, Al2O3  0 to 15%, MgO + CaO  0 to 35%, SrO  0 to 35%, BaO  0 to 35%, ZnO  0 to 8%.

Abstract: A substrate for a plasma display panel, having electrodes and a covering material for the electrodes, provided thereon, wherein the covering material is a non-crystallizable glass having a softening point of at most 510.degree. C. and an average thermal expansion coefficient of from 70.times.10.sup.-7 to 85.times.10.sup.-7 /.degree.C. within a range of from 50 to 350.degree. C.