Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Optically detectable, floatable, arsenic- and antimony-free, ceramisable lithium-aluminium-silicate glass

A lithium aluminosilicate, optical detection technology, applied in the field of glass ceramics, can solve problems such as unfavorable enhancement

Active Publication Date: 2012-05-30
SCHOTT AG
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, tin clarification also has disadvantages, especially when it is ceramicized, it produces interfering Sn / Ti colored complexes that absorb in the short-wave to medium-wave part of visible light
Although this colored complex is only detrimental to high-quality requirements in the starting glass for the float process, its detriment is significantly increased in ceramization and leads to a clearly perceptible yellow-brown color

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optically detectable, floatable, arsenic- and antimony-free, ceramisable lithium-aluminium-silicate glass
  • Optically detectable, floatable, arsenic- and antimony-free, ceramisable lithium-aluminium-silicate glass
  • Optically detectable, floatable, arsenic- and antimony-free, ceramisable lithium-aluminium-silicate glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0074] Example 20 shows the transmission spectrum of 4 mm thick pristine glass (Examples 1, 2). The characteristic absorption band of Nd ions which is particularly suitable for marking and recycling float flat glass according to the invention is seen in Example 2 of the invention.

Embodiment 19

[0079] Glass 2 in Table 1 was chemically prestressed by ion exchange in a sodium nitrate salt bath at 450°C for 22 hours. The thickness of the compressive stress layer is 1 mm, and the polished sample is measured by optical stress measurement before prestressing. The measured surface compressive stress is 7900 nm / cm, and the tensile stress inside the glass is 100 nm / cm. The thickness of the compressive stress region on the surface was 320 μm. The flat glass according to the invention exhibits excellent chemical prestressability due to its relatively high compressive stress values ​​at the surface and the excellent compressive stress layer thickness.

Embodiment 20

[0080] Example 20 shows a comparison of the transmission spectra of Glass 1 and Glass 2.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
transition temperatureaaaaaaaaaa
thicknessaaaaaaaaaa
yellowness indexaaaaaaaaaa
Login to View More

Abstract

An optically detectable, floatable arsenic- and antimony-free, glazable lithium-aluminosilicate glass is provided. The invention relates to the optically detectable, floatable arsenic- and antimony-free, glazable lithium-aluminosilicate glass which can be prestressed, and the glass ceramic converted therefrom. The glass or the glass ceramic has a composition (in % by weight based on oxide) of essentially 55-69 of SiO2, 19-25 of Al2O3, 3.2-5 of Li2O, 0-1.5 of Na2O, 0-1.5 of K2O, 0-2.2 of MgO, 0-2.0 of CaO, 0-2.0 of SrO, 0-2.5 of BaO, 0-<1.5 of ZnO, 1-3 of TiO2, 1-2.5 of ZrO2, 0.1-<1 of SnO2, 2.5-5 of SigmaTiO2+ZrO2+SnO2, 0-3 of P2O5, 0.01-0.6 of Nd2O3, 0-0.005 of CoO, 0-1 of F, and 0-2 of B2O3.

Description

technical field [0001] The present invention relates to a ceramizable, arsenic- and antimony-free, optically detectable, floatable lithium-aluminosilicate glass which can be prestressed and which can be transformed into glass ceramics. Background technique [0002] Due to their excellent thermal properties, panels made of glass ceramics and their precursor glasses are used in large numbers especially for cooking surfaces, oven trays, fireplace shutters and fire glazing. In many applications of this glass, the glass pane is thermally or chemically prestressed in order to increase its strength as safety glass or for the protection of personnel. [0003] In order to achieve high optical quality, the glass is produced in the float process. Transparent glass panes are practically no longer visually distinguishable from window panes (potassium-sodium glass). Compared with other forming methods, the float process can produce flat glass with larger dimensions, because in the floa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/118C03C3/097C03C3/093C03C3/087C03C10/12C03C10/00
CPCC03C10/0045C03C10/0027C03C1/002C03C10/0054C03C3/095C03C3/076C03C3/083C03C3/089C03C3/093
Inventor F·西伯斯H·-W·比特B·鲁丁格G·劳坦施拉格K·施奈德M·杰夸里W·施米德鲍尔
Owner SCHOTT AG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com