Glass with improved chemically strengthened warping properties

A glass and warping technology, which is applied in the tempering of glass, glass manufacturing equipment, manufacturing tools, etc., can solve the problems of large environmental hazards, affecting the service life of the kiln body, and corrosion of the kiln body, so as to achieve good strengthening warpage and improve Surface scratch resistance, warpage improvement effect

Active Publication Date: 2021-08-24
XIANNING NANBO PHOTOELECTRIC GLASS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

3) Adjust the alkali metal content of the air surface and the tin surface to control the chemical tempering warping of float glass, such as patent CN201380068423, which uses acidic gases and liquids containing F, Cl, S and other atoms to dealkalize with the glass surface reaction, the acid gas used in this method has a corrosive effect on the kiln body and affects the service life of the kiln body. In addition, the acidic gas and liquid containing F, Cl, S and other atoms used are more harmful to the environment.

Method used

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  • Glass with improved chemically strengthened warping properties
  • Glass with improved chemically strengthened warping properties
  • Glass with improved chemically strengthened warping properties

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] There is no special requirement for the thickness of the glass substrate, and when the chemical strengthening process is fixed, the greater the thickness, the smaller the chemical strengthening warpage, and the product with a thickness of 0.7mm is selected in the present invention.

[0023] During the glass preparation process, through tin bath process adjustment, acid treatment and annealing kiln coating control, the obtained glass has good chemically strengthened warping properties.

[0024] Specifically, the adjustment of the tin bath process can firstly reduce the pressure of the tin bath appropriately, increase the temperature of some areas of the tin bath, and increase the tin content in the atmosphere, and secondly adjust the composition of the tin bath protective gas, and add a certain amount of tin Steam, and pass the protective gas mixed with tin vapor into the tin bath, so that the tin in the atmosphere of the tin bath is in a supersaturated state, and a tin f...

Embodiment 2

[0041] Example 2: In this example, the principle of sol-gel coating is used to form a certain thickness of a stress-free layer on one side of the glass. At the same time, the increase in thickness will also change the geometric center of the glass, thereby improving warpage.

[0042] Experimental raw materials: 0.7mm, 2.5D products, silica sol.

[0043] Experimental process: The glass is cut, CNC, and polished to obtain a 2.5D unreinforced product, and the non-polished surface is coated with silica sol, and the silica sol is cured in an oven. Multiple batches of tests were carried out, in which the comparison sheet was not coated with silica sol, while the experimental samples were coated with silica sol. The specific data is shown in Table 5 below. From the test data, the silica sol coating is also conducive to the improvement of warpage.

[0044] table 5

[0045]

Embodiment 3

[0047] Experimental raw materials: 0.7mm product, aluminum sol suspension with a solid content of 10%.

[0048] Experimental process: Put the 300mm*300mm product into the tempering preheating furnace, heat it to 500°C, atomize the aluminum sol with a spray bottle, spray an appropriate amount of aluminum sol onto the air surface of the glass sheet, close the furnace door, and keep it warm for a period of time , cooling with furnace temperature. Then carry out CNC, cleaning, tempering and testing. The specific data are shown in Table 6 below.

[0049] Al-rich coating on one side of the glass 2 o 3 Solvent suspension forms a certain thickness of stress-free layer on one side of the glass, and the increase in thickness will also change the geometric center of the glass, thereby improving warpage.

[0050] Al plated 2 o 3 In the case of sol, the tempering warpage should theoretically increase first and then decrease, because when a small amount of Al is plated, the surface [A...

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PUM

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Abstract

The invention discloses a glass that can effectively improve the warping performance of chemical strengthening. The side surface of the glass, that is, the distribution of CS*DOL in the thickness direction satisfies |(∫CS*DOLdT, 0≤T≤D / 2) / (∫CS*DOLdT,‑ D / 2≤T≤0)‑1|≤10T%, T is the corresponding thickness, with the center of the glass as the coordinate origin, the tin surface is ‑D / 2, and the air surface is D / 2; in addition, the central tensile stress (CT )=CS*DOl / (T‑2DOL). Realize the controllability of the chemically strengthened warping performance of the float glass.

Description

technical field [0001] The invention belongs to the field of glass and relates to float glass, a glass which can effectively improve the chemically strengthened warping performance and a preparation method thereof. Background technique [0002] In recent years, electronic information products have basically been displays with touch panels, such as tablet computers, smart phones, and vehicle screens. There is a layer of protective glass on the outermost layer of the touch panel display, also known as "Cover Glass" cover glass. As the outer screen of the mobile phone, the cover glass needs to have good mechanical strength (bending resistance, impact resistance, drop resistance). At present, the method to increase the mechanical properties of the cover glass is mainly the low-temperature chemical ion exchange strengthening method. + ) Monovalent cations with large ionic radius (such as K + ) and Na + ion exchange, so that K + Ways to get to the surface. In short, in a cer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B18/20C03B18/22C03B18/18C03B25/00C03C15/00C03C17/245C03C17/25C03B27/02C03C21/00
CPCC03B18/18C03B18/20C03B18/22C03B25/00C03B27/02C03C15/00C03C17/006C03C17/245C03C17/25C03C21/002
Inventor 宋占财王洪陈洪文杨渭巍
Owner XIANNING NANBO PHOTOELECTRIC GLASS CO LTD
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