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Low temperature chemical strengthening process for glass

A glass and chemical technology, applied in the field of low-temperature technology, can solve the problems of glass visual properties, corrosiveness, etc.

Pending Publication Date: 2018-04-03
CORNING INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The high temperatures required by conventional ion exchange processes can cause the salts in the ion exchange solution to decompose, forming by-products that can affect the visual properties of the glass and in some embodiments are corrosive

Method used

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  • Low temperature chemical strengthening process for glass
  • Low temperature chemical strengthening process for glass
  • Low temperature chemical strengthening process for glass

Examples

Experimental program
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Embodiment

[0043] Example

[0044] Embodiments are further illustrated using the following examples, which are illustrative only and do not limit the scope of the present disclosure.

[0045] Eighteen glass sheets were formed according to conventional methods. Form 6 panes of glass from each of the following three glass types: glass 3, Glass 4 and alkali aluminosilicate glass (both manufactured by Corning).

[0046] By mixing 55% by weight of KNO 3 and 45% by weight NaNO 3 To prepare the main ion exchange solution. The mixture was heated to 450°C and 18 glass plates were individually immersed in the primary ion exchange solution for the durations shown in Table 1 below. Subsequently, the glass plate was removed from the primary ion exchange solution and rinsed with water to remove any residual ion exchange solution.

[0047] By mixing 95% by weight of KNO 3 and 5% by weight Ca(NO 3 ) 2 To prepare the secondary ion exchange solution. The mixture was then heated to the temperatu...

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Abstract

A method of chemically strengthening a glass. The method INC.ludes heating an ion exchange solution to a temperature less than about 360 C, and contacting the glass and the strengthening solution at the temperature for a duration from about 0.5 hours to about 24 hours. The ion exchange solution INC.ludes a primary nitrate and at least one monovalent or divalent cation nitrate component in an amount from about 1 wt.% to about 10 wt.%.

Description

[0001] Cross References to Related Applications [0002] This application claims priority under 35 U.S.C. §119 to U.S. Provisional Application Serial No. 62 / 121,693, filed February 27, 2015, the contents of which are based upon and incorporated by reference in its entirety. [0003] background technical field [0004] This specification relates generally to processes for chemically strengthening glass, and more particularly to low temperature processes for chemically strengthening glass. More specifically, the specification relates to a low temperature process for chemically strengthening glass in an ion exchange solution containing additives. Background technique [0005] Chemically strengthened glass is currently used in hand-held devices such as mobile phones, media players, and other devices, as well as in other applications requiring high strength and abrasion resistance. [0006] Ion exchange is a chemical strengthening process that begins with glass containing small...

Claims

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Application Information

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IPC IPC(8): C03C21/00
CPCC03C21/001C03C21/002C03C21/005
Inventor S·戈麦斯郭晓菊P·奥拉姆
Owner CORNING INC
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