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Borosilicate glass article

A glass product and glass technology, applied in the field of borosilicate glass products, can solve the problems of high thermal expansion coefficient and no hydrolysis resistance.

Pending Publication Date: 2022-06-07
SCHOTT AG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of alkali metals only results in a high coefficient of thermal expansion
Furthermore, this glass composition does not exhibit good hydrolysis resistance

Method used

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  • Borosilicate glass article
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Embodiment Construction

[0115] The present invention relates to glasses that are resistant in several respects. Particularly resistant glass is especially useful when the glass is exposed to special requirements. This is the case in extreme environments, for example. Extreme environments are especially application areas that require special resistance, durability and safety, such as areas that require explosion protection.

[0116] In one embodiment, the present invention relates to glass articles having particular suitability for use in extreme environments and having the following properties:

[0117] - The induced extinction α(λ) at 200 nm does not exceed 0.300 after 48 hours of irradiation with a deuterium lamp,

[0118] - The induced extinction α(λ) at 254 nm does not exceed 0.100 after 48 hours of irradiation with a deuterium lamp,

[0119] - a thickness of at least 0.3 mm, in particular at least 3 mm and / or at most 20 mm, and / or

[0120] - Thermal shrinkage is less than 50μm / 100mm.

[012...

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Abstract

The invention relates to a glass having high ultraviolet transmittance, advantageous delamination properties and good weld connection properties. The invention also relates to the use of such a glass, in particular UV LEDs, UV transparent lamps, UV lamp protection tubes, UV transparent materials for UV oxidation reactors, UV flame detectors, UV photocells, solar reactors, spectroscopic analyzers, photomultipliers and windows (in particular EPROM windows), solar cell covers (e.g. In the space) and / or UV transparent cells (e.g. For UV excited photoluminescence measurements), glass fluxes of enamel coatings, ultraviolet transparent layers, ultraviolet-transparent moldings, microfluidic components (e.g., for use in photoluminescence-based diagnostic methods), UV CCL (cold cathode lamps), and / or xenon flash lamps.

Description

technical field [0001] The present invention relates to articles made of borosilicate glass having high UV transmission, favorable properties in terms of segregation and good bonding properties when welded. The invention also relates to the use of this glass, especially in UV lamps and photomultiplier tubes. Background technique [0002] In addition to quartz glass, alkali borosilicate glasses are also known in the prior art, which likewise have a high UV transmission and are easier to melt. The disadvantage compared to quartz glass is that this glass with a high boron content has a strong tendency to segregate. Segregation means the formation of an alkali metal or alkaline earth metal borate phase in the glass in addition to the silicate glass phase. In addition to the nodules caused by evaporation, this also leads to reduced transmission in the UV range during production. In addition, the segregation leads to deterioration of the hydrolysis resistance of the glass. [...

Claims

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Application Information

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IPC IPC(8): C03C3/118C03C4/00A61L2/10
CPCC03C3/118A61L2/10A61L2/26A61L9/20A61N5/0624C02F1/32C03C3/089C03C3/091A23L5/20A23L5/30A23C7/04A61L2202/121A61N2005/0661
Inventor S·克鲁格O·霍克莱恩M·格林R·E·艾希霍尔茨B·沃兹林K·瑙曼
Owner SCHOTT AG
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