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Chemical tempering treatment method of glass

A chemical tempering and glass technology, applied in the field of glass preparation, can solve problems such as blocking the exchange layer and affecting the exchange depth, and achieve the effects of improving warpage, enhancing high-strength glass, and reducing differences

Inactive Publication Date: 2019-08-09
XIANNING NANBO PHOTOELECTRIC GLASS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high concentration of large ions in the salt bath will block the exchange layer and affect the exchange depth

Method used

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  • Chemical tempering treatment method of glass
  • Chemical tempering treatment method of glass
  • Chemical tempering treatment method of glass

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Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1: A method for chemically tempering glass, the glass is 0.7mm 2.5D shaped glass. The specific ingredients are in molar ratio: 68 parts of SiO 2 , 13 Al 2 o 3 , 12 Na 2 O, 3 copies of K 2 O, 3 parts MgO and 1 part ZrO 2 .

[0026] Specific process:

[0027] 1) The selected glass is soaked in the first salt bath (sodium nitrate 3wt%). The temperature of the salt bath is 440°C, and the soaking time is 3h. After soaking, it is rapidly annealed at room temperature, and the annealing time is ≤30min: salt bath soaking Complete cooling annealing at room temperature immediately after completion; fan can be used for rapid cooling

[0028] 2) The annealed glass obtained in step 1) is placed in the second salt bath (sodium nitrate 3wt%) for soaking. The temperature of the salt bath is 390° C., and the soaking time is 50 minutes. 20min: Complete cooling annealing at room temperature immediately after salt bath immersion;

[0029] Through the above treatment, the...

Embodiment 2

[0039] Embodiment 2: the method for glass chemical toughening treatment, wherein the specific composition of glass is: 68 parts of SiO by molar ratio 2 , 5 Al 2 o 3 , 10 parts of Na 2 O, 5 copies of K 2 O, 9 parts of MgO, 1 part of CaO.

[0040] Thickness: 0.55mm flat glass.

[0041] The specific steps are:

[0042] 1) The selected glass is soaked in the first salt bath (sodium nitrate 6wt%), the temperature of the salt bath is 440°C, and the soaking time is 5h. After soaking, it is rapidly annealed at room temperature, and the annealing time is ≤30min: salt bath soaking Complete cooling annealing at room temperature immediately after completion;

[0043] 2) The annealed glass obtained in step 1) is placed in the second salt bath (sodium nitrate 10wt%) for soaking. The temperature of the salt bath is 380° C., and the soaking time is 60 minutes. 20min: Complete cooling annealing at room temperature immediately after salt bath immersion;

[0044] Through the above treatm...

Embodiment 3

[0056] A method for chemical tempering treatment of glass, wherein the specific composition of the glass is: 68 parts of SiO in molar ratio 2 , 15 Al 2 o 3 , 12 Na 2 O, 3 copies of K 2 O, 2 parts of MgO.

[0057] Thickness: 0.7mm 2.5D shape glass.

[0058] The specific steps are:

[0059] 1) The selected glass is immersed in the first salt bath (sodium nitrate 5wt%). The temperature of the salt bath is 440°C, and the soaking time is 5h. Complete cooling annealing at room temperature immediately after completion;

[0060] 2) The annealed glass obtained in step 1) is placed in the second salt bath (sodium nitrate 5wt%) for soaking. The temperature of the salt bath is 400° C., and the soaking time is 30 minutes. 20min: Complete cooling annealing at room temperature immediately after salt bath immersion;

[0061] 3) The annealed glass obtained in step 2) is placed in the third salt bath (sodium nitrate 5wt%) for soaking. The temperature of the salt bath is 390° C., and the...

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Abstract

The invention discloses a chemical tempering treatment method of glass. The method includes the steps of: 1) selecting glass containing alkali metal ions, and immersing the glass in a first salt bathat 400-460DEG C for more than or equal to 1h, and then conducting rapid annealing at room temperature; 2) immersing the obtained annealed glass in a second salt bath at 350-420DEG C for at least 5min,and then conducting rapid annealing at room temperature, wherein the concentration of the first salt bath is less than or equal to the concentration of the second salt bath, and the concentration ofthe second salt bath is less than or equal to twice the concentration of the first salt bath. Through the above operations, chemical tempering treatment of the glass can be completed. The method can improve the glass strength, and also can improve the glass warpage.

Description

technical field [0001] The invention belongs to the field of glass preparation, in particular to a method for chemically tempering glass. Background technique [0002] Tempered glass, also known as strengthened glass, usually uses chemical or physical methods to form a compressive stress layer on the surface of the glass. When the glass is subjected to external forces, it first offsets the surface stress, thereby improving the bearing capacity and enhancing the glass's own resistance to wind pressure, cold and heat, and impact. sex etc. [0003] Chemical tempering is a process of ion exchange. Ion exchange is the ability of smaller alkali metal ions in the glass (efflux ions) to be exchanged in an elevated temperature salt bath for larger alkali metal ions (exchange ions), ie the larger ions replace the smaller ions in the glass. The densely packed larger ions on the glass surface generate high compressive stress (referred to here as CS), which in turn provides high-streng...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C21/00
CPCC03C21/002
Inventor 杨渭巍王洪熊圣安宋占财崔秀珍王明忠
Owner XIANNING NANBO PHOTOELECTRIC GLASS CO LTD
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