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 obtai

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

[0112] (example 1)

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

[0114] In step 1, the purity is 99.9% or more, the average particle size is 20nm, and the specific surface area is 90m using an ultrasonic homogenizer. 2 33.9 parts by mass of the raw material silica powder per g 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.

[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 are mixed and defoamed by a vacuum pump-equipped rotating and revolving mixer to prepare a mixed liquid.

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

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

[0118] After taking out t...

Example

[0139] (Example 2)

[0140] In step 7, the molded body degreased in step 6 was fired in the atmosphere at 1125°C instead of vacuum firing. Except for step 7, the same steps as in Example 1 were implemented.

Example

[0141] (Example 3)

[0142] In step 1, the purity is 99.9% or more, the average particle size is 100nm, and the specific surface area is 55~65m using an ultrasonic homogenizer. 2 62.9 parts by mass of raw material silica powder per g and 37.1 parts by mass of water whose pH was adjusted to 13 with a pH adjuster as a solvent were dispersed to prepare a dispersion.

[0143] In step 2, 94.1 parts by mass of the above-mentioned dispersion, 5.0 parts by mass of the water-soluble epoxy resin, and 0.9 parts by mass of the aliphatic amine curing agent are mixed and defoamed using a rotating and revolving mixer equipped with a vacuum pump to prepare a mixed solution.

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

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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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