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Aluminosilicate glass having high thermal stability and low processing temperature

A technology of aluminosilicate glass and processing temperature, applied in the field of aluminosilicate glass, can solve problems such as insufficient anti-devitrification performance, loss of glass characteristics, and influence on glass forming.

Active Publication Date: 2012-07-04
SCHOTT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this glass composition has the disadvantage that the devitrification resistance is insufficient, that is, in the case of forming processes, for example in the case of drawing tubes, devitrification devitrification occurs when the glass is cooled, which affects the glass on the surface. molding
In addition, the original glass characteristics are lost due to crystallization

Method used

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  • Aluminosilicate glass having high thermal stability and low processing temperature
  • Aluminosilicate glass having high thermal stability and low processing temperature
  • Aluminosilicate glass having high thermal stability and low processing temperature

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Embodiment Construction

[0163] A glass composition according to the invention is selected and a glass is produced therefrom. For the melting, a 4 liter platinum pot was used, in which the raw material was placed at a melting temperature of 1580° C. for more than 8 hours and kept there at this temperature for 14 hours. The glass melt was then cooled to 1400° C. within 8 hours with stirring and then poured into a graphite mold preheated to 500° C. After pouring, the casting mold was placed in a cooling furnace preheated to 650° C., which was cooled to room temperature at 5° C. / hour.

[0164] The compositions and properties of the glasses according to the invention are summarized in Tables 1 and 2 below.

[0165] Table 1

[0166]

[0167]

[0168] Table 2

[0169]

[0170]

[0171]

[0172] Anti-crystallization:

[0173] + good

[0174] O Moderate

[0175] - Difference

[0176] It is thus described for the first time by the present invention to provide an alternative glass compo...

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PUM

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Abstract

The invention relates to an aluminosilicate glass having a thermal expansion coefficient ranging from 8 to 10 x 10-6 / K in a temperature range of 20 to 300 DEG C, a transformation temperature Tg ranging from 580DEG C; C to 640DEG C; C, and a processing temperature VA ranging from 1065DEG C; C to 1140DEG C; C, and thus can be used as an alternative to soda lime glass. The invention further relates to the use of the glass according to the invention in applications where high thermal resistance of the glass is advantageous, in particular as substrate glass, superstrate glass and / or cover glass in the field of semiconductor technology, preferably for Cd-Te or for CIS and / or CIGS photovoltaic applications, and for other applications in solar technology.

Description

technical field [0001] The present invention relates to an aluminosilicate glass with high heat resistance and low processing temperature. Background technique [0002] Soda-lime glass, also known as alkali-alkaline earth-silicate glass, belongs to the earliest known type of glass and is the most widely used glass ("standard glass"). Soda-lime glass is mainly used as flat glass, such as mirror or window glass, and as packaging glass, for example for bottles, food packaging, beverage bottles and the like. A disadvantage of known soda-lime glasses is that soda-lime glasses have only relatively little heat resistance, for example with a glass transition temperature ("Tg") in the range of approximately 490 to 530°C. The use of the hitherto known soda-lime glasses is thus very limited. [0003] There is always a need to change and modify glass compositions in order to change and improve properties and better match desired applications. However, the problem here is always that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/087C03C4/00
CPCC03C4/0092C03C3/087
Inventor 约尔格·欣里希·费希纳弗伦茨·奥特埃哈德·迪克克里斯托夫·克斯
Owner SCHOTT AG
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