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Quartz glass and ultraviolet emitting element member using same

A technology of quartz glass and straight lines, applied in the field of components for ultraviolet light-emitting elements, can solve problems such as low productivity, achieve the effects of suppressing deterioration and good laser processability

Pending Publication Date: 2019-09-03
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to obtain such a small piece of quartz glass member, it is necessary to process the ingot of synthetic quartz glass obtained by the flame hydrolysis method into a wafer, and further perform small pieces by laser processing, and the productivity is low.

Method used

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  • Quartz glass and ultraviolet emitting element member using same
  • Quartz glass and ultraviolet emitting element member using same
  • Quartz glass and ultraviolet emitting element member using same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0113] The above steps of Step 1 to Step 8 are carried out to obtain quartz glass.

[0114] In step 1, the purity of 99.9% or more, the average particle size of 20nm, and the specific surface area of ​​90m 2 33.9 parts by mass of silicon dioxide powder / g as a raw material was dispersed in 66.1 parts by mass of water whose pH was adjusted to 13 using a pH adjuster as a solvent to prepare a dispersion liquid.

[0115] In step 2, 88.2 parts by mass of the above-mentioned dispersion liquid, 10.0 parts by mass of the water-soluble epoxy resin, and 1.8 parts by mass of the aliphatic amine curing agent were mixed and defoamed by a rotary mixer equipped with a vacuum pump to prepare a mixed solution.

[0116] In step 3, the above-mentioned liquid mixture was filled in a mold made of polyethylene with a diameter of 30 mm×10 mmt.

[0117] In step 4, the liquid mixture filled in the mold is allowed to stand at room temperature to be solidified.

[0118] After the molded body is taken o...

example 2

[0140] In step 7, the molded body degreased in step 6 was subjected to atmospheric firing at 1125° C. instead of vacuum firing. Except for the step 7, the same procedure as in Example 1 was carried out.

example 3

[0142] In step 1, the purity of 99.9% or more, the average particle size of 100nm, and the specific surface area of ​​55 to 65m 2 A dispersion was prepared by dispersing 62.9 parts by mass of silica powder / g as a raw material and 37.1 parts by mass of water whose pH was adjusted to 13 with a pH adjuster as a solvent.

[0143] In step 2, 94.1 parts by mass of the dispersion liquid, 5.0 parts by mass of the water-soluble epoxy resin, and 0.9 parts by mass of the aliphatic amine curing agent were mixed and defoamed using an autorotation-revolution mixer equipped with a vacuum pump to prepare a mixed solution.

[0144] In the following steps, the same steps as in Example 1 were carried out to obtain quartz glass.

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PUM

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Abstract

The purpose of the invention is to provide a quartz glass which has an excellent laser processability or which has wavelength-selective transmission properties and, therefore, is suitably usable for sterilization. The present invention pertains to a quartz glass wherein, when an indentation is formed on the surface of the quartz glass by using a Vickers indenter, a pressing load of the Vickers indenter at which the incidence of cracking is 50% is 0.1-0.5 kgf, or a quartz glass wherein the linear transmittance (%) at a wavelength of 265 nm in terms of a quartz glass thickness of 1 mm is 85% ormore and the difference [delta]T between the linear transmittance (%) at a wavelength of 230 nm and the linear transmittance (%) at a wavelength of 200 nm is 10-50%.

Description

technical field [0001] The present invention relates to quartz glass and a member for an ultraviolet light-emitting element using the quartz glass. The quartz glass of the present invention is suitable for a window member of ultraviolet light emitting elements such as ultraviolet light emitting diodes (UV-LED). Background technique [0002] Ultraviolet light-emitting devices are used in various applications such as sterilization, disinfection, water purification, air purification, phototherapy, plant growth control, sensing, resin curing, analysis, and surface modification. In the past, mercury lamps were often used as ultraviolet light-emitting elements, but in recent years, a switch to LEDs (light-emitting diodes) with less environmental impact has been studied. [0003] In an ultraviolet LED (UV-LED), a flat plate or a lens-shaped window member is used for the light emitting portion. The window member functions as a cover member that protects the ultraviolet LED chip, a...

Claims

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Application Information

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IPC IPC(8): C03B20/00H01L33/48
CPCC03B20/00H01L33/48C03C4/12C03C3/06C03C2201/02
Inventor 贵岛美纱子生田目真美本间脩胜田信篠崎泰夫谷田正道
Owner ASAHI GLASS CO LTD
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