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Plane glass ceramic object having at least one dull polishing region and its preparing method

A glass-ceramic and plane technology, which is applied in the field of preparing such glass-ceramic bodies and flat glass-ceramic bodies, can solve the problem that the coating is only suitable for maintenance, and achieve the effect of a simple process

Active Publication Date: 2009-12-02
SCHOTT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the heat resistance of this type of resin is up to 400°C, so that the coating is only suitable for areas of the glass-ceramic cooking surface that are kept in cold operation (below 400°C)

Method used

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  • Plane glass ceramic object having at least one dull polishing region and its preparing method
  • Plane glass ceramic object having at least one dull polishing region and its preparing method
  • Plane glass ceramic object having at least one dull polishing region and its preparing method

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Embodiment

[0033] Black glass-ceramic (designation CERAN) described in DE 19721737C1 and described in EP 0220333B1) on plate-like substrates in a non-ceramic state, i.e. in the corresponding blank glass substrate, are coated by screen printing with conventional screen printing media based on aromatic hydrocarbon mixtures (such as Zschimmer & Schwarz GmbH & Co. KG Chemische Fabriken products) and grades are 3.3 Paste composed of borosilicate glass. The paste ratio is 10 parts by weight of glass frit and 12 parts by weight of screen printing medium. The mesh of the screen was 36 μm.

[0034] The data of glass powder are as follows:

[0035] 3.3 Composition (according to DE 19643870C1)

[0036] Oxide

Weight % (±0.3)

SiO 2

80.9

B 2 o 3

12.8

Na 2 o

3.3

K 2 o

0.6

Al 2 o 3

2.4

[0037] Clarifying agent: NaCl

[0038] Particle size distribution of glass powder

[0039] granulari...

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PUM

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Abstract

Until now, such frosted areas on the glass-ceramic body could only be produced with expensive or hazardous substances, or they could not withstand the thermal and mechanical requirements eg during operation of the glass-ceramic body as a cooking surface. In order to avoid these disadvantages, the present invention provides a planar glass ceramic body having at least one frosted area, wherein the frosted area is formed by a frosted molten glass layer on the glass ceramic material, the frosted molten glass having a temperature of greater than 750°C have a high softening point and a different refractive index than glass-ceramic materials.

Description

technical field [0001] The invention relates to a planar glass-ceramic body having at least one frosted region, preferably a glass-ceramic body for use as a cooking surface. However, the planar glass-ceramic body can also be formed by sight glass panes, such as chimney sight glass panes or furnace sight glass panes, as well as by lamp shades. [0002] The invention also relates to a method for producing such glass-ceramic bodies. Background technique [0003] New cooking zones usually have glass-ceramic cooking surfaces for the individual cooking zones or cooking positions heated by gas, induction radiators or electric radiators. [0004] Known glass-ceramic cooking surfaces generally have a dark to black color appearance, in particular to ensure the desired invisibility into the cooking area interior. This can be achieved by coloring the glass-ceramic raw material in the melt or by an opaque colored coating of the underside of the corresponding glass-ceramic plate. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/00C03C4/00C03C17/02C03B19/01A47J27/00F24C15/04C03C8/02C03C17/04C04B41/86F24C15/06F24C15/10H05B3/74
CPCC03C17/04H05B3/748
Inventor I·科斯马斯D·温内曼恩L·亚亚比H·斯特里格勒
Owner SCHOTT AG