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% SiO.sub.2, 0 to 20% B.sub.2O.sub.3, 0 to 25% Al.sub.2O.sub.3, 0 to 3% Li.sub.2O, 0 to 3% Na.sub.2O, 0 to 3% K.sub.2O, 0 to 3% Li.sub.2O+Na.sub.2O+K.sub.2O, 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.

Embodiments of the present invention pertain to antimicrobial glass compositions, glasses, and articles. The articles include a glass, which may include a glass phase and a cuprite phase. In other embodiments, the glasses include a plurality of Cu.sup.1+ ions, a degradable phase including B.sub.2O.sub.3, P.sub.2O.sub.5 and K.sub.2O, and a durable phase including SiO.sub.2. Other embodiments include glasses having a plurality of Cu.sup.1+ ions disposed on the surface of the glass and in the glass network and/or the glass matrix. The article may also include a polymer. The glasses and articles disclosed herein exhibit a 2 log reduction or greater in a concentration of at least one of Staphylococcus aureus, Enterobacter aerogenes, Pseudomonas aeruginosa bacteria, Methicillin Resistant Staphylococcus aureus, and E. coli, under the EPA Test Method for Efficacy of Copper Alloy as a Sanitizer testing condition and under Modified JIS Z 2801 for Bacteria testing conditions.

Embodiments of the present invention pertain to antimicrobial glass compositions, glasses, and articles. The articles include a glass, which may include a glass phase and a cuprite phase. In other embodiments, the glasses include a plurality of Cu.sup.1+ ions, a degradable phase including B.sub.2O.sub.3, P.sub.2O.sub.5 and K.sub.2O, and a durable phase including SiO.sub.2. Other embodiments include glasses having a plurality of Cu.sup.1+ ions disposed on the surface of the glass and in the glass network and/or the glass matrix. The article may also include a polymer. The glasses and articles disclosed herein exhibit a 2 log reduction or greater in a concentration of at least one of Staphylococcus aureus, Enterobacter aerogenes, Pseudomonas aeruginosa bacteria, Methicillin Resistant Staphylococcus aureus, and E. coli, under the EPA Test Method for Efficacy of Copper Alloy as a Sanitizer testing condition and under Modified JIS Z 2801 for Bacteria testing conditions.

A glass that contains Si, B, Al, and Zn. The glass has SiO.sub.2 at a content of 15% by weight to 65% by weight, B.sub.2O.sub.3 at a content of 11% by weight to 30% by weight, Al.sub.2O.sub.3, and ZnO, wherein a weight ratio of the SiO.sub.2 to the B.sub.2O.sub.3 (SiO.sub.2/B.sub.2O.sub.3) is 1.21 or higher, and a weight ratio of the Al.sub.2O.sub.3 to the ZnO (Al.sub.2O.sub.3/ZnO) is 0.75 to 1.64, and wherein an alkaline-earth metal is excluded as a material contained in the glass.

A glass that contains Si, B, Al, and Zn. The glass has SiO.sub.2 at a content of 15% by weight to 65% by weight, B.sub.2O.sub.3 at a content of 11% by weight to 30% by weight, Al.sub.2O.sub.3, and ZnO, wherein a weight ratio of the SiO.sub.2 to the B.sub.2O.sub.3 (SiO.sub.2/B.sub.2O.sub.3) is 1.21 or higher, and a weight ratio of the Al.sub.2O.sub.3 to the ZnO (Al.sub.2O.sub.3/ZnO) is 0.75 to 1.64, and wherein an alkaline-earth metal is excluded as a material contained in the glass.

A ceramic composition includes an antimicrobial glass composition that includes components harmless to the human body and maintains an antimicrobial function semi-permanently. Specifically, the ceramic composition includes a novel antimicrobial glass composition that includes a glass former SiO.sub.2 as a main component, and ZnO and SnO as antimicrobial components.

There is disclosed an antibacterial glass composite and a manufacturing method thereof. The antibacterial glass composite may include 15 to 40% by weight (wt) of SiO.sub.2: 20 to 40% wt of B.sub.2O.sub.3: 10 to 30% wt of at least one of Na.sub.2O, K.sub.2O and Li.sub.2O; to 15% wt of at least one of MgO and TiO.sub.2; 5 to 40% wt of at least one of ZnO and CaO; to 10% wt of CuO; and 0.1 to 3% wt of Ag.sub.2O, thereby having an anti-biofilm effect.

There is disclosed an antibacterial glass composite and a manufacturing method thereof. The antibacterial glass composite may include 15 to 40% by weight (wt) of SiO.sub.2: 20 to 40% wt of B.sub.2O.sub.3: 10 to 30% wt of at least one of Na.sub.2O, K.sub.2O and Li.sub.2O; to 15% wt of at least one of MgO and TiO.sub.2; 5 to 40% wt of at least one of ZnO and CaO; to 10% wt of CuO; and 0.1 to 3% wt of Ag.sub.2O, thereby having an anti-biofilm effect.

A light guide plate includes: an optical glass, the optical glass having a refractive index n.sub.d of at least 1.75 or of at least 1.80 and including Nb.sub.2O.sub.5 in an amount of at least 15 mol % and P.sub.2O.sub.5 in an amount of at least 19 mol %, the light guide plate having an internal transmission of at least 0.80 or of at least 0.90, measured at a wavelength of 440 nm and a sample thickness of 10 mm.

The glass for covering a semiconductor element contains: in mol %, as a glass composition, SiO.sub.2: 20% to 36%, ZnO: 8% to 40%, B.sub.2O.sub.3: 10% to 24%, Al.sub.2O.sub.3: 10% to 20%, and MgO+CaO: 8% to 22%, in which SiO.sub.2/ZnO is 0.6 or more and less than 3.3 in terms of a molar ratio, and a lead component is substantially not contained.