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Low-expansion glass-ceramics tableware

A glass-ceramic, low-expansion technology, applied in the field of glassware, can solve problems such as difficulty in heat treatment of glass tableware, and achieve the effects of solving self-burst, improving mechanical strength, and removing thermal stress and residual stress

Inactive Publication Date: 2016-08-03
JIANGSU YUEFENG TECH
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AI Technical Summary

Problems solved by technology

The existing heat treatment method for low expansion coefficient glass-ceramics is mainly a two-step method. This method is mainly aimed at thin plates or small pieces of glass that require rapid heat treatment, and it is difficult to heat treat glass tableware.

Method used

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Embodiment Construction

[0008] Below in conjunction with specific embodiment the present invention is described in detail:

[0009] (1) A low-expansion glass-ceramic tableware, the weight percentage of its formula is composed of: SiO 2 : 62%, P 2 o 5 : 8%, Li 2 O4.5%, MgO: 1.2%, ZnO: 1.5%, CaO: 0.8%, BaO: 3%, SrO2%, Sb 2 o 3 : 0.8%, Al 2 o 3 、TiO 2 and ZrO 2 , the Al 2 o 3 and SiO 2 The sum of the weight percentages is 80%, the TiO 2 and ZrO 2 The sum of the weight percentages is 4%;

[0010] (2) Calculate the oxides, carbonates and enough nitrates used in the batch according to the composition of the weight percentage, and accurately weigh them and mix them uniformly to form a glass batch; add the batch to the glass melting furnace that has been heated to 1560 °C , fully stirred several times during the melting process, raised the temperature to 1600°C for clarification, poured the molten glass into the mold after homogenizing and cooling down, and cooled down to room temperature throu...

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Abstract

A low-expansion glass-ceramics tableware is composed of the following ingredients (by weight): 51.5-64% of SiO2, 6.8-11% of P2O5, 3-5.2% of Li2O, 0.5-2.2% of MgO, 0.4-2.1% of ZnO, 0.2-2.5% of CaO, 0.5-4.5% of BaO, 0.2-3% of SrO, 0.6-2% of Sb2O3, Al2O3, TiO2 and ZrO2, wherein the total weight percentage of Al2O3 and SiO2 is 75-84%, and the total weight percentage of TiO2 and ZrO2 is 3.5-5%. As heat treatment temperature and time of glass tableware are accurately controlled, thermal stress and residual stress in glass tableware are effectively removed, mechanical strength, hot-cold resistance and impact resistance of glass tableware are raised, and self-explosion phenomenon of glass tableware is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of glassware, in particular to a low-expansion glass-ceramic tableware. Background technique [0002] Glass is a poor conductor of heat, and when it is heated or cooled, it will experience dramatic, non-uniform temperature changes, creating considerable temperature differences inside the glass. Most of the existing tempered glassware production process adopts the tempering process with air as the cooling medium, so that the heated glassware is subjected to chilling treatment in a short time through a large amount of air, thereby completing the tempering process. Japanese Patent Laid-Open No. 2005-89272 and Japanese Patent Laid-Open No. 2005-231994 disclose two kinds of glass-ceramic tableware with low expansion coefficient. The chemical composition of these two technical solutions does not contain SrO, and the crystallization tendency and forming difficulty are not clear. The existing heat treatment method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00
Inventor 刘银
Owner JIANGSU YUEFENG TECH
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