The present disclosure relates to an antibacterial glass composition and a manufacturing method thereof. The antibacterial glass composition according to the present disclosure comprises 20 to 40 wt % of SiO.sub.2; 5 to 25 wt % of B.sub.2O.sub.3; 15 to 25 wt % of one or more of Na.sub.2O, K.sub.2O and Li.sub.2O; and 25 to 45 wt % of CaO, preventing a deterioration in durability and having an excellent antibacterial property. Additionally, the present disclosure relates to an antibacterial glass composition and a manufacturing method of antibacterial glass powder using the same that is a novel silicate glass composition, is transparent and colorless and has an excellent antibacterial property and a high antifungal activation level, such that when the antibacterial glass composition is used as a coating agent of a glass shelf, an additive of a plastic injection molded product and the like, the antibacterial glass composition prevents the deformation of the exteriors of the glass shelf, the plastic injection molded product and the like.

The present disclosure relates to an antibacterial glass composition and a manufacturing method thereof. The antibacterial glass composition according to the present disclosure comprises 20 to 40 wt % of SiO.sub.2; 5 to 25 wt % of B.sub.2O.sub.3; 15 to 25 wt % of one or more of Na.sub.2O, K.sub.2O and Li.sub.2O; and 25 to 45 wt % of CaO, preventing a deterioration in durability and having an excellent antibacterial property. Additionally, the present disclosure relates to an antibacterial glass composition and a manufacturing method of antibacterial glass powder using the same that is a novel silicate glass composition, is transparent and colorless and has an excellent antibacterial property and a high antifungal activation level, such that when the antibacterial glass composition is used as a coating agent of a glass shelf, an additive of a plastic injection molded product and the like, the antibacterial glass composition prevents the deformation of the exteriors of the glass shelf, the plastic injection molded product and the like.

Provided is a light guide plate for an image display device which uses lead-free glass, has excellent color reproducibility and a light weight, and may obtain a wide viewing angle. A light guide plate for an image display device, which guides image light inputted from an image display element and outputs the image light toward a user's pupil, is configured to be made of lead-free glass having a refractive index of 1.8 or more with respect to a wavelength of the image light, and to have internal transmittance of 0.6 or more with respect to a wavelength of 400 nm when a plate thickness is 10 mm.

Provided is a light guide plate for an image display device which uses lead-free glass, has excellent color reproducibility and a light weight, and may obtain a wide viewing angle. A light guide plate for an image display device, which guides image light inputted from an image display element and outputs the image light toward a user's pupil, is configured to be made of lead-free glass having a refractive index of 1.8 or more with respect to a wavelength of the image light, and to have internal transmittance of 0.6 or more with respect to a wavelength of 400 nm when a plate thickness is 10 mm.

An enamel composition, a method for preparing an enamel composition, and a cooking appliance including an enamel composition are provided. The enamel composition may include a base glass frit, and a catalytic glass frit. Further, the enamel composition may include 3 to 20 parts by weight of the catalytic glass frit based on 100 parts by weight of the base glass frit.

Glass compositions include boron oxide (B.sub.2O.sub.3), lanthanum oxide (La.sub.2O.sub.3), tungsten oxide (WO.sub.3) and zirconia (ZrO.sub.2) as components and may optionally include niobia (Nb.sub.2O.sub.5), titania (TiO.sub.2), bismuth oxide (Bi.sub.2O.sub.3), yttria (Y.sub.2O.sub.3), tellurium oxide (TeO.sub.2), SiO.sub.2, PbO and other components. The glasses may be characterized by high refractive index at 587.56 nm and low density at room temperature relative to known glasses.

Glass compositions include boron oxide (B.sub.2O.sub.3), lanthanum oxide (La.sub.2O.sub.3), tungsten oxide (WO.sub.3) and zirconia (ZrO.sub.2) as components and may optionally include niobia (Nb.sub.2O.sub.5), titania (TiO.sub.2), bismuth oxide (Bi.sub.2O.sub.3), yttria (Y.sub.2O.sub.3), tellurium oxide (TeO.sub.2), SiO.sub.2, PbO and other components. The glasses may be characterized by high refractive index at 587.56 nm and low density at room temperature relative to known glasses.

The present disclosure discloses a lithium-tellurium silicon-lead bismuth multi-component glass-oxide-complex system and conductive paste containing same, belonging to the technical field of solar cells. According to the present disclosure, a “functional modularization” strategy is adopted in a formula design of the glass-oxide-complex system, and glass oxide systems with selective reactivity for different passivation layers are compounded based on the structures, compositions and thicknesses of the passivation layers, so that a paste formula is developed, which is composed of lithium-containing, tellurium-silicon-containing and lead-containing glass oxides. Due to adoption of the modularized formula strategy, active ingredients can be better controlled, and the overall paste formula is more optimized, so that the laminated passivation layers can be selectively burned through to obtain a more balanced contact, and better battery performance on silicon wafers with different passivation layer thicknesses can be achieved, thus achieving excellent photoelectric conversion efficiency.

To provide an optical glass having a high refractive index and a relatively low specific gravity, and an optical element.

An optical glass which is a SiO.sub.2—TiO.sub.2—Nb.sub.2O.sub.5-based glass, and in which the content of SiO.sub.2 is 10% by mass or greater, the total content of Na.sub.2O, K.sub.2O, and Cs.sub.2O(Na.sub.2O+K.sub.2O+Cs.sub.2O) is 11.0% by mass or less, and the specific gravity and the refractive index nd thereof satisfy formula (1).

nd≥0.2×specific gravity+1.18  (1):

To provide an optical glass having a high refractive index and a relatively low specific gravity, and an optical element.

An optical glass which is a SiO.sub.2—TiO.sub.2—Nb.sub.2O.sub.5-based glass, and in which the content of SiO.sub.2 is 10% by mass or greater, the total content of Na.sub.2O, K.sub.2O, and Cs.sub.2O(Na.sub.2O+K.sub.2O+Cs.sub.2O) is 11.0% by mass or less, and the specific gravity and the refractive index nd thereof satisfy formula (1).

nd≥0.2×specific gravity+1.18  (1):