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Glass object

An article and glass technology, applied in the field of glass articles, can solve the problems of unknown changes in chemical strengthening suitability, loss of chemical durability, and excessive alkali.

Inactive Publication Date: 2014-02-05
TOYO SASAKI GLASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the disclosed invention, potassium crystal glass is not used for chemical strengthening suitability, but Na-containing glass is used. 2 O is 10wt% or more, CaO is 4.2wt% or less, and ZnO is 6wt% or more potassium-zinc crystal glass composition.
[0016] On the other hand, it has been clarified that Na 2 The O content is more than 10wt% of the method, because K is also a basic oxide 2 The O content is more than 8wt%, resulting in too much alkali, so that SiO 2 The formed network becomes open, causing loss of chemical durability
[0017] In addition, the CaO content of all known potassium crystal glass compositions exceeds 5wt%, and changes in chemical strengthening suitability when a part of ZnO is replaced with other alkaline earth oxides (MgO, SrO) still unknown

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0101] The composition of Example 1 satisfies the predetermined legal crystal glass conditions in terms of glass composition, refractive index, and density similarly to the composition of the known potassium-zinc crystal glass suitable for chemical strengthening (Comparative Example 1), and its alkali elution The amount is small, so it shows excellent chemical resistance. The composition of the crystal glass of the present invention also has chemical strengthening suitability effective in improving the practical strength of tableware, which will be described in detail below.

[0102] [Table 1]

[0103]

[0104] Table 2 shows that in the present invention, substituting a part of ZnO in the known composition with specific compositional ratios of three kinds of alkaline earth oxides (MgO, CaO, and SrO) contributes to the maintenance of chemical strengthening. Ion exchange facilitates function.

[0105] In Example 2 and Examples 4 to 6, after surface coating with potassium aq...

Embodiment 6

[0118] The Vickers hardness of the glass of Example 6 was: 561Hv before chemical strengthening, and 587Hv after chemical strengthening.

[0119] After soaking the surface of the glass sample composed of the embodiment of the present invention and the surface of the glass sample composed of the comparative example with a potassium salt solution, the temperature range of 420°C, 440°C, 460°C, and 480°C within the temperature range suitable for ion exchange Carry out the ion exchange of 90 minutes, measure the thickness and the stress value of the chemical strengthening stress that is given, the comparison result of the same kind of the best example is shown in Table 2 and figure 2 . It is given in the embodiment that it can impart a thickness greater than 15 μm necessary for scratch resistance, and greater than 1500 kg / cm 2 The ion exchange conditions of the stress values, while the comparative examples do not show better than them.

[0120] The high bending strength of the ma...

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Abstract

The invention discloses a glass object and aims to provide a chemical enhanced crystal glass product which is prepared by using a cheap combination of other oxides replacing most of a ZnO-containing combination of potassium-zinc crystal glass which is widely-known to have chemical enhanced suitability, is easy for fusion in a tank furnace and mechanical forming of a tableware, reaches the legal crystal glass standards in the aspects of glass composition, refractive index and density, is a novel glass combination, has excellent chemical enhanced suitability, has high practical strength, can be washed with alkali and can be used as a tableware. According to the invention, in comparison with the potassium-zinc crystal glass which is widely-known to have chemical enhanced suitability, the chemical enhanced high-grade crystal glass product has the following advantages: cost of raw materials can be reduced by half; practical strength is high; and deterioration is less.

Description

[0001] This application is a divisional application of an invention patent application with an application date of May 2, 2008, an application number of 200880128095.8, and an invention title of "glass article". technical field [0002] The invention relates to glass objects such as high-grade tableware, vases, ashtrays, decorative lighting, decorations and other decorations. Background technique [0003] Crystal glass is used as high-end tableware and handicrafts because of its high transparency and brightness, moderate weight, beautiful sound, and easy molding and processing. [0004] ZnO, BaO, PbO, K in oxide composition 2 The content of O alone or in total is 10 wt% or more, and the refractive index n d ≥1.520, density ≥2.45g / cm 3 It is the quality indication standard (EC Directive) for crystal glass. [0005] Conventional lead (containing PbO) crystal glass and barium (containing BaO) crystal glass have problems in terms of environment and alkali resistance because r...

Claims

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Application Information

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IPC IPC(8): C03C3/087C03C3/095C03C21/00
Inventor 柴田宪章丰田洋一玉卷圭子
Owner TOYO SASAKI GLASS
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