Tempered sheet glass and preparation method thereof

A thin plate and glass technology, applied in the field of tempered thin plate glass and its preparation, can solve the problems of incomplete chemical tempering, platinum and rhodium erosion in platinum crucibles, etc. Effect

Active Publication Date: 2017-08-18
CAIHONG GRP SHAOYANG SPECIAL GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem that it exists is that the glass frit is full of oxides, and the melting atmosphere is a strong reducing atmosphere, which may cause serious corrosion of platinum and rhodium in the platinum crucible; CN101508524 provides a glass suitable for chemical toughening and its chemical toughened glass. The preparation method proposes a silicon oxide-alumina-lithium oxide glass suitable for low-temperature ion exchange process and easy to melt. The glass is suitable for chemical toughening, and its weight percentage is composed of: SiO 2 : 55-60%, B 2 o 3 : 0.1-2.5%, Al 2 o 3 : 11-16%, Na 2 O: 14-17%, K 2 O: 1-8%, ZrO 2 : 0-8%, CaO: 0-5%, MgO: 0-5%, Sb 2 o 3 : 0-1%
The surface compressive stress of the obtained glass reaches 610-1100MPa, and the depth of the stress layer is 31-80μm. This scheme only uses K 2 O Ion exchange for chemical tempering with a molten salt containing potassium ions, which may result in incomplete chemical tempering due to insufficient potassium ions

Method used

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preparation example Construction

[0048] The invention discloses a method for preparing tempered thin-plate glass, the whole process of which is as follows.

[0049] The first step is the treatment of broken glass.

[0050] 1) Firstly, after removing the organic components from the collected thin glass cullets, use a wheel grinder to crush them to particles with a particle size of less than 10mm;

[0051] 2) Then, pass the broken particles through an electromagnetic iron removal device to remove iron;

[0052] 3) Then, put the broken glass particles of iron removal into the washing machine for cleaning;

[0053] 4) Finally, dry the cleaned cullet at 110-150° C. to become cullet raw material.

[0054] The second step is the preparation of thin glass.

[0055] 1) First, according to the mass fraction of the mixture, accurately weigh 48.5-52.1% of quartz sand, 1.35-1.55% of boric acid, 1.1-1.5% of borax, 8.5-10.5% of alumina, and 16.5-18.1% of lithium carbonate , 3.5-4.5% lithium nitrate, 3.5-5.0% sodium carb...

Embodiment 1

[0076] The first step is the treatment of broken glass.

[0077] 1) Firstly, after removing the organic components from the collected thin glass cullets, use a wheel grinder to crush them to particles with a particle size of less than 10mm;

[0078] 2) Then, pass the broken particles through an electromagnetic iron removal device to remove iron;

[0079] 3) Then, put the broken glass particles of iron removal into the washing machine for cleaning;

[0080] 4) Finally, dry the cleaned cullet at 110° C. to become cullet raw material.

[0081] The second step is the preparation of thin glass.

[0082]1) First, according to the mass fraction of the mixture, accurately weigh 48.5% of quartz sand, 1.55% of boric acid, 1.1% of borax, 9.97% of aluminum oxide, 16.5% of lithium carbonate, 4.5% of lithium nitrate, 3.5% of Sodium carbonate, 2.5% tripotassium phosphate, 0.2% calcium carbonate, 3.5% calcium phosphate, 6.5% basic magnesium carbonate, 1.5% strontium carbonate, 0.15% stanno...

Embodiment 2

[0102] The first step is the treatment of broken glass.

[0103] 1) Firstly, after removing the organic components from the collected thin glass cullets, use a wheel grinder to crush them to particles with a particle size of less than 10mm;

[0104] 2) Then, pass the broken particles through an electromagnetic iron removal device to remove iron;

[0105] 3) Then, put the broken glass particles of iron removal into the washing machine for cleaning;

[0106] 4) Finally, dry the cleaned cullet at 120° C. to become cullet raw material.

[0107] The second step is the preparation of thin glass.

[0108] 1) First, according to the mass fraction of the mixture, accurately weigh 48.7% of quartz sand, 1.52% of boric acid, 1.22% of borax, 10.5% of aluminum oxide, 17.1% of lithium carbonate, 4.31% of lithium nitrate, 3.25% of Sodium carbonate, 2.25% tripotassium phosphate, 0.25% calcium carbonate, 3.1% calcium phosphate, 6.2% basic magnesium carbonate, 1.4% strontium carbonate, 0.17% ...

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Abstract

The invention relates to tempered sheet glass and a preparation method thereof. The method comprises the steps as follows: step 1, a mixture formed after mixing is accurately weighed according to the mass fraction of the mixture; step 2, cullet accounting for 30%-55% of the mass fraction of the mixture is added and uniformly mixed, and a batch is obtained; step 3, a formed glass sheet is prepared after the batch is molten; step 4, the formed glass sheet is annealed at 700-750 DEG C for 30-60 min and cooled to 450 DEG C, and sheet glass is obtained; step 5, tempering materials are weighed for later use according to the mass fraction; step 6, the tempering materials are kept at the constant temperature of 410-450 DEG C for 1-2 h and uniformly mixed molten salt is formed; step 7, the sheet glass at 450 DEG C is placed in the uniformly mixed molten salt, kept at the constant temperature of 410-450 DEG C for 1-6 h and taken out; step 8, the sheet glass taken out of the molten salt is dried, naturally cooled to the room temperature, washed and dried, and the tempered sheet glass is obtained.

Description

technical field [0001] The invention relates to a preparation method of thin-plate glass, in particular to tempered thin-plate glass and a preparation method thereof. Background technique [0002] Protective glass is commonly used in electronic and mobile electronic devices such as personal data assistants, mobile or cellular phones, watches, laptops, notebooks, digital cameras and PDAs, or as a substrate glass for touch screens and televisions. In recent years, with the rapid development of flat panel display technology, it has gradually replaced the traditional CRT (Cathode Ray Tube, cathode ray tube) display products, and TFT-LCD (Thin Film Transistor Liquid Crystal Display, thin film transistor liquid crystal display) is currently Among the mainstream flat panel display products on the market, TFT-LCD substrate glass (hereinafter referred to as substrate glass) is an important part of TFT-LCD and has become one of the key raw materials restricting the development of TFT-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/091C03C6/02C03B27/03C03B5/235C03B19/02
CPCC03B5/235C03B19/02C03B27/03C03C1/002C03C3/091Y02P40/50Y02P40/57
Inventor 杨国洪刘仲军王答成郭萍莉王志强
Owner CAIHONG GRP SHAOYANG SPECIAL GLASS CO LTD
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