Heat treatment process for crystal porcelain glass tableware

A glass and tableware technology, applied in the field of heat treatment of crystal porcelain glass tableware, can solve the problems of glass tableware heat treatment difficulties, etc., achieve the effect of solving self-burst, removing thermal stress and residual stress, and improving mechanical strength

Inactive Publication Date: 2020-01-03
JIANGSU YUEFENG TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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 kind of toughened crystal porcelain glass 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 tem...

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Abstract

The invention discloses a heat treatment process for crystal porcelain glass tableware. The formula comprises the following components in percentages 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 sum of the Al2O3 and the SiO2 in percentages by weight is 75-84%, and the sum of the TiO2 and the ZrO in percentages by weight is 3.5-5%. Due to the fact that the temperature and the time of heat treatment of the glass tableware are accurately controlled, heat stress and residual stress in the glass tableware are effectively removed, the mechanical strength, the cold and heat resistance and the impact resistance of the glass tableware are improved,and the phenomenon that the glass tableware bursts automatically is effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of glassware, and in particular relates to a heat treatment process for crystal porcelain glass 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. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00C04B32/02
CPCC03C10/00C04B32/02
Inventor 张小苏
Owner JIANGSU YUEFENG TECH
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