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Coloured transparent lithium aluminium silicate glass-ceramic and use thereof

A technology of lithium aluminum silicate and glass ceramics, which is applied in lighting and heating equipment, treatment of combustion products, combustion methods, etc., and can solve problems such as adverse effects of strength

Active Publication Date: 2019-03-05
SCHOTT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, the glass must be free from any devitrification during the forming process, which means that no damaging crystals should form, which would adversely affect the strength of the starting glass and the glass-ceramics produced from them

Method used

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  • Coloured transparent lithium aluminium silicate glass-ceramic and use thereof
  • Coloured transparent lithium aluminium silicate glass-ceramic and use thereof
  • Coloured transparent lithium aluminium silicate glass-ceramic and use thereof

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Embodiment Construction

[0025] The environmentally friendly colored transparent lithium aluminosilicate glass-ceramic according to the invention fulfills the various requirements stated, it has the general properties required for glass-ceramics suitable as coating surfaces and has specific transmission properties and is produced without Certain ingredients are harmful to the environment.

[0026] Accordingly, the glass-ceramic according to the invention has a light transmittance measured in the CIE system, a light transmittance Y(D65, 2°) of at least 2.5%, preferably greater than 2.5%, more preferably at least 3.5%, very preferably at least 4.5%, Up to 10%, preferably up to 7.5%, more preferably 5%. These values ​​were measured on polished glass-ceramic samples of 4 mm thickness with standard illuminant D65, observer angle 2°.

[0027] The spectral transmittance τ at 465 nm of the glass ceramics according to the invention is greater than 1.0%, preferably greater than 1.2%. The value is measured on ...

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Abstract

A description is given of a coloured, transparent, lithium aluminium silicate glass-ceramic and also of the use thereof, said glass-ceramic possessing a light transmission Y of 2.5% to 10% and a spectral transmission [tau](at 465 nm) of more than 1.0%.

Description

technical field [0001] The invention relates to a colored transparent lithium aluminosilicate glass-ceramic according to the preamble of claim 1 . The invention also relates to the use of such LAS glass ceramics. Background technique [0002] Known to contain Li 2 O-Al 2 o 3 -SiO 2 The glass of the system can be transformed into glass ceramics with high quartz solid solution and / or keatite solid solution as the main crystal phase. For the first type of glass-ceramic, the synonyms "β-quartz" or "β-eucryptite", for the second type, "β-spodumene", are found in the literature as the name of the crystalline phase. A preferred field of application for LAS glass-ceramics is their use as cooking surfaces. [0003] A key property of these glass-ceramics is that they have an extremely low coefficient of thermal expansion, α, in the temperature range from room temperature to about 700°C 20 / 700 , usually below 1.5×10 -6 / K. Glass ceramics with a high quartz solid solution as th...

Claims

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Application Information

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IPC IPC(8): C03C10/12C03C4/02
CPCC03C4/02C03C10/0027F24C15/10C03C3/087C03C3/097C03C3/093F24C15/005F23J13/02C03C10/0054C03C2204/00
Inventor E·韦斯M·斯皮尔M·博克迈耶T·赞可尔K·舍恩伯格J·斯廷纳O·霍克莱恩U·马腾斯M·巴格
Owner SCHOTT AG
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