Molten salt for chemical strengthening of glass and application process thereof

A chemical tempering and glass technology, applied in glass tempering, glass manufacturing equipment, manufacturing tools, etc., can solve the problems of high energy consumption, lack of outstanding improvement in the mechanical properties of tempered glass, and accelerated ion exchange speed, etc., to achieve reduction Energy consumption, large-scale production and cost-saving effects

Inactive Publication Date: 2010-12-22
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the operation process of this method, not only the mixed salt is required to go through two heating and melting processes, but also the molten salt is required to have a longer heat preservation time (5 hours in total), which consumes a lot of energy in the actual production process.
In addition, the patent emphasizes that the prepared molten salt accelerates the ion exchange rate and obtains tempered glass with small optical distortion and good mechanical properties; however, compared with tempered glass obtained by other methods, the mechanical properties of tempered glass obtained by this method are not significantly improved
At present, there are relatively few research reports on chemically tempered glass used in high-speed train windows.

Method used

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  • Molten salt for chemical strengthening of glass and application process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Put the glass plate into the chromic acid washing solution and ultrasonically clean it for 10 minutes, and then ultrasonically clean it in deionized water and absolute ethanol respectively to obtain a clean glass plate and dry it for storage.

[0017] The preparation ingredients include a mixed salt of main salt and auxiliary salt, wherein the main salt component KNO 3 100 parts by weight, auxiliary salt component: Al 2 o 3 3 parts by weight, KCl 0.3 parts by weight, K 2 CO 3 4 parts by weight, KOH 0.7 parts by weight.

[0018] Grind the prepared mixed salt until fine and mix well.

[0019] The prepared and ground mixed salt is put into a temperature-controlled electric furnace, and the electric furnace is heated from room temperature to 400° C. within 30 minutes, and then kept for 30 minutes to obtain molten salt. The pre-etched glass plate is preheated, and the specific treatment method is: heating from room temperature to 400° C. within 30 minutes, and then k...

Embodiment 2

[0023] Put the glass plate into the chromic acid washing solution and ultrasonically clean it for 15 minutes, and then ultrasonically clean it in deionized water and absolute ethanol respectively to obtain a clean glass plate and dry it for storage.

[0024] The formulation contains a mixture of primary and secondary salts. Among them, the main salt component KNO 3 100 parts by weight, auxiliary salt component: Al 2 o 3 4 parts by weight, KCl 2 parts by weight, K 2 CO 3 2 parts by weight and 0.9 parts by weight of KOH.

[0025] Grind the prepared mixed salt until fine and mix well.

[0026] The prepared and ground mixed salt is put into a temperature-controlled electric furnace, and the electric furnace is heated from room temperature to 400° C. within 30 minutes, and then kept for 30 minutes to obtain molten salt. The pre-etched glass plate is preheated. The specific treatment method is: put the glass plate into a temperature-controlled electric furnace, and the elect...

Embodiment 3

[0030] Put the glass plate into the chromic acid washing solution and ultrasonically clean it for 15 minutes, and then ultrasonically clean it in deionized water and absolute ethanol respectively to obtain a clean glass plate and dry it for storage.

[0031] The formulation contains a mixture of primary and secondary salts. Among them, the main salt component KNO 3 100 parts by weight, auxiliary salt component: Al 2 o 3 3 parts by weight, KCl 1 part by weight, K 2 CO 3 2 parts by weight, KOH 0.3 parts by weight.

[0032] Grind the prepared mixed salt until fine and mix well.

[0033]The prepared and ground mixed salt is put into a temperature-controlled electric furnace, and the electric furnace is heated from room temperature to 400° C. within 30 minutes, and then kept for 30 minutes to obtain molten salt. The pre-etched glass plate is preheated. The specific treatment method is: the glass plate is placed in a temperature-controlled electric furnace, and the electric ...

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Abstract

The invention provides molten salt for chemical strengthening of glass. The molten salt comprises main salt KNO3 and auxiliary salts Al2O3, KCl, K2CO3 and KOH mixed proportionally. The invention also provides a process of applying the molten salt to the chemical strengthening of common Na-Ca-Si flat glass. The technological conditions of ion exchange reaction temperature, time and the like are controlled, and a specific acid corrosion strengthening process is introduced before the ion exchange reaction to be combined with the ion exchange reaction to realize chemical strengthening. When the molten salt and the strengthening process of the invention are applied to the chemical strengthening of the common Na-Ca-Si flat glass, the compressive strength, the compression elastic modulus, the bending strength and the bending elastic modulus of the glass are greatly improved, the chemical strengthening time is remarkably shortened, the chemical strengthening temperature is reduced, the energy consumption for production is obviously reduced and the efficiency is increased.

Description

technical field [0001] The invention relates to the field of special glass and its manufacture, in particular to a molten salt that can be applied to the chemical strengthening of high-speed train window glass, and a process for tempering and strengthening the window glass by using the molten salt. Background technique [0002] With the construction of my country's high-speed railway transportation system, EMUs are developing towards high speed. The advancement of EMU technology and the increase in speed have put forward higher requirements for the reliability of key components such as window glass. [0003] At present, the main glass tempering and strengthening processes mainly include physical tempering and chemical tempering. Compared with the physical tempering process, chemical tempering can obtain higher surface pressure and a larger area of ​​strengthening layer, resulting in higher strength and better mechanical properties; in addition, the chemical tempering proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B27/03
Inventor 张启龙杨辉郝嵘樊先平汪海燕黄振晖
Owner ZHEJIANG UNIV
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