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Sitall produce with suppressed surface and method of producing the sitall

A glass-ceramic, glass technology, applied in glass manufacturing equipment, glass molding, glass pressing, etc., to achieve the effect of low heating

Inactive Publication Date: 2009-12-23
SCHOTT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, all known coatings always represent a compromise in this respect or otherwise

Method used

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  • Sitall produce with suppressed surface and method of producing the sitall
  • Sitall produce with suppressed surface and method of producing the sitall
  • Sitall produce with suppressed surface and method of producing the sitall

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] in accordance with figure 1 In the temperature-time graph of the graph, the temperature change distribution on the surface of the green glass body is drawn as a dotted line and the temperature change distribution on the surface of the pressing tool, which is used, for example, in the lithium-aluminum- Silicate (LAS) glass-ceramics produce a structured surface on green glass. The time measurement starts at 500 °C and is thus significantly below the nucleation temperature T Kb Reheating of the green glass begins at a temperature of . undergo a reheating period t of less than 30 seconds 1 , the surface of the green glass body is heated to a temperature of approximately 1100° C. by means of the previously described gas-fired infrared slit radiator. At this temperature, the surface of the glass body has a value of 10 6.6 Viscosity of Pas or less. After reaching this temperature, the glass substrate comes into contact with the tool, which was previously preheated to a te...

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PUM

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Abstract

The invention relates to a microcrystal glass product which is produced by green glass ceramic and has a pressed surface structure. The invention also relates to a method for re-shaping the green ceramic for producing the microcrystal glass, wherein the green glass body preformed from a glass melt and already cooled to a temperature lower than a nucleus formation temperature TKb is reheated to such a surface temperature that the viscosity of the glass becomes 10<6.6>Pa s to 10<9>Pa s by a gas infrared porous illuminator, thereafter subjected to a secondary formation step, and then cooled to a temperature lower than the transformation temperature Tg at a high cooling rate. The invention also relates to a method for producing the microcrystal glass with the structuring surface. The structuring surface has the advantages of that the whole product is made of the same microcrystal glass product and thus the different characters between the surface layer and the microcrystal glass does not exist and the surface has lotus effect.

Description

technical field [0001] The present invention has the following subjects: a method for reshaping, in particular structuring, the surface of a green glass body for the manufacture of glass-ceramics (glass-ceramics); a method for producing glass-ceramics with structured surfaces; and Glass-ceramics manufactured in accordance with this method. Background technique [0002] Forming solutions for glass-ceramics are generally known. The difference is that the initial molding from the melt and the reshaping according to the category. Reshaping methods such as gravity sinking, pressing, pressing or vacuum drawing are known to obtain application-specific three-dimensional shaping of glass-ceramics. [0003] Said forming process is known to be applied to green glass, ie glass-like semi-finished products of glass-ceramic. [0004] Normally, green glass is heated in known forming methods to a maximum temperature of about 1000° C. inside the glass in order to obtain a sufficient viscos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B23/00C03B29/00C03B32/02
CPCC03B2215/41C03B23/02C03B32/02C03B29/025C03B11/082
Inventor 波利娜·埃贝林贝恩德·沃尔芬贝恩特·霍佩
Owner SCHOTT AG