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High-transmission glass

A technology of glass and transmittance, which is applied in the field of high transmittance glass, and can solve problems such as uneven color, reduced brightness, and uneven brightness

Inactive Publication Date: 2018-04-17
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among them, when high-transmittance glass is applied to light guide plates that have conventionally used acrylic resin plates, it is clear that light absorption inside the glass in the visible light region (380nm to 780nm wavelength range) cannot be ignored as the optical path length becomes longer. , resulting in a reduction in brightness or uneven brightness and color within the plane

Method used

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Embodiment

[0192] Hereinafter, although an Example is given and the present invention is concretely described, the present invention is not limited thereto. In addition, examples 1, 2, 15, 47, and 48 are comparative examples, and the others are examples.

[0193]

[0194] The raw materials of each component are adjusted to achieve the target composition, and melted at a temperature of 1500° C. to 1700° C. for 3 to 10 hours using a platinum crucible. At the time of melting, 400 g of raw materials were injected into the molten glass at 20-minute intervals, a platinum stirrer was inserted into the molten glass, and the glass was homogenized by stirring for 1 hour. Next, the molten glass was flowed out to be formed into a plate shape, and slowly cooled to room temperature at a cooling rate of 1° C. per minute to obtain a glass block. The particle size of the raw material and the type and amount of the clarifying agent can be appropriately selected.

[0195] As the particle size of the ra...

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Abstract

The present invention relates to a glass which includes, in terms of oxide amount in mass%, 50-85% of SiO2, 0-10% of B2O3, 1-20% of Na2O, and up to 20% of K2O, contains substantially no Sb2O3, and hasan (Ni+Cr) content higher than 0 but not higher than 1.2 mass ppm and in which the total iron oxide content (t-Fe2O3) in terms of Fe2O3 amount, the Na2O / Al2O3, and the (Al2O3+K2O) are respectively inspecific ranges and the contents of components satisfy a specific relationship.

Description

technical field [0001] The present invention relates to a high-transmittance glass with excellent melting properties, high internal transmittance in the visible light region, and flattened internal transmittance spectrum, and a glass plate and glass article including the glass. Background technique [0002] Glass with high visible light transmittance (so-called whiteboard glass. Hereinafter, it may also be referred to as "high transmittance glass") is required for various applications. For example, in construction applications (interior materials, exterior materials), electronic equipment applications (light guide materials for planar light-emitting devices, so-called light guide plates), and other industrial applications (protective glass for solar power generation modules, etc.), there are Visible light is effectively transmitted to improve the utilization efficiency of light, or it is used as a material that brings high designability (luxury) due to high transmission. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/085C03C3/087C03C3/091
CPCC03C3/083C03C3/085C03C3/087C03C3/091C03C4/00G02B2006/12038C03C4/0092
Inventor 梶原贵人荒井雄介菅野直树坂上贵寻
Owner ASAHI GLASS CO LTD