High-strength glass cover plate

Abstract

The utility model discloses a kind of high-strength glass cover plate, the high-strength glass cover plate includes: substrate layer, anti-cracking layer and surface functional coating, substrate layer, anti-cracking layer and surface functional coating are sequentially stacked to form high-strength glass cover plate whole;Substrate layer surface is provided with gradient ion exchange layer, gradient ion exchange layer is arranged on the side surface of substrate layer towards anti-cracking layer;Gradient ion exchange layer includes first ion exchange layer, second ion exchange layer and third ion exchange layer, first ion exchange layer, second ion exchange layer and third ion exchange layer are sequentially arranged on substrate layer surface, first ion exchange layer is arranged on the surface layer side of substrate layer;Third ion exchange layer is arranged on the inside side of substrate layer.The high-strength glass cover plate gradient ion exchange layer of the utility model strengthens the structural strength of substrate layer.

Description

Technical Field

[0001] This utility model relates to the field of glass cover technology, and in particular to a high-strength glass cover. Background Technology

[0002] Glass covers are specially reinforced transparent protective materials primarily used in electronic devices, transportation, and construction as protective layers for screens or surfaces. Their core characteristics are high hardness, impact resistance, and good light transmittance, while also offering additional features such as fingerprint resistance and self-cleaning. Currently, glass covers are generally modified to adapt their performance to various market applications through material strengthening, surface treatment, and flexible design. For example, mobile devices such as smartphones and tablets have high requirements for drop resistance and high light transmittance in their glass covers; automotive center console screens require high-temperature resistance and anti-glare performance; and special protective glass panels, such as bulletproof glass and military equipment screens, need to be reinforced for impact resistance.

[0003] Currently, glass cover plates generally use ion exchange technology to improve the surface strength of the substrate. However, a single ion exchange layer on the substrate surface only strengthens the surface under a single compressive stress standard, and the internal strength and crack resistance of the substrate are insufficient. Utility Model Content

[0004] Therefore, it is necessary to provide a high-strength glass cover to address the technical problems of the single surface strengthening layer and insufficient strength of existing glass cover substrates.

[0005] A high-strength glass cover plate includes a substrate layer, a crack-resistant layer, and a surface functional coating, which are stacked sequentially to form a high-strength glass cover plate as a whole.

[0006] A gradient ion exchange layer is provided on the surface of the substrate layer, and the gradient ion exchange layer is provided on the side of the substrate layer facing the crack-resistant layer.

[0007] The gradient ion exchange layer includes a first ion exchange layer, a second ion exchange layer, and a third ion exchange layer, which are arranged sequentially on the surface of the substrate layer. The first ion exchange layer is disposed on one side of the surface of the substrate layer, and the third ion exchange layer is disposed on one side of the interior of the substrate layer.

[0008] In one embodiment, the substrate layer described above is a composite microcrystalline glass substrate.

[0009] In one embodiment, the thickness of the substrate layer is set to 0.5-3 mm.

[0010] In one embodiment, the thickness of the gradient ion exchange layer on the surface of the substrate layer is set to 150-300 μm.

[0011] In one embodiment, the thickness of the third ion exchange layer is set to be greater than 150 μm.

[0012] In one embodiment, the thickness of the second ion exchange layer is set to 20-150 μm.

[0013] In one embodiment, the thickness of the third ion exchange layer is set to 1-20 μm.

[0014] In one embodiment, the crack-resistant layer includes a crack-resistant microstructure portion and an edge stress portion. The crack-resistant microstructure portion is disposed on the main body of the crack-resistant layer, and the edge stress portion is disposed at the edge of the crack-resistant microstructure portion.

[0015] In one embodiment, the aforementioned crack resistance is achieved by providing spiderweb-like grooves on the surface of the structural part;

[0016] In one embodiment, the aforementioned edge stress region is scanned by a CO2 laser at a speed of 500 mm / s to form a temperature gradient annealing zone.

[0017] In one embodiment, the aforementioned surface functional coating includes a diamond-like carbon (DLC) coating and a self-healing coating, wherein the DLC coating is disposed on the surface of the crack-resistant layer and the self-healing coating is disposed on the surface of the DLC coating.

[0018] The aforementioned high-strength glass cover plate's gradient ion exchange layer enhances the structural strength of the substrate layer. Specifically, the first ion exchange layer is configured as a shallow replacement layer with a high concentration of large ions, the second ion exchange layer as a medium replacement layer with a medium concentration of medium ions, and the third ion exchange layer as a deep replacement layer with a low concentration of low ions, thus forming the overall gradient ion exchange layer. Based on this, the gradient ion exchange layer can achieve stress gradient matching optimization of the substrate layer. The first ion exchange layer, i.e., the shallow replacement layer, has ultra-high surface compressive stress, which can suppress the generation of microcracks; the second ion exchange layer, i.e., the medium replacement layer, has high surface compressive stress, which can prevent cracks from propagating into the deeper layers of the substrate; the third ion exchange layer, i.e., the deep replacement layer, has reduced ion replacement, and the compressive stress gradually transitions to an equilibrium state within the substrate layer, thereby effectively optimizing the structural strength and impact resistance of the glass cover plate. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of a high-strength glass cover plate in one embodiment;

[0020] Figure 2 This is a schematic diagram of the exploded structure of a high-strength glass cover plate in one embodiment;

[0021] Figure 3 for Figure 2 An enlarged structural diagram of part M in the illustrated embodiment. Detailed Implementation

[0022] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] Please see Figures 1 to 3This utility model discloses a high-strength glass cover plate 10, which includes a substrate layer 100, a crack-resistant layer 200, and a surface functional coating 300. The substrate layer 100, the crack-resistant layer 200, and the surface functional coating 300 are stacked sequentially to form the high-strength glass cover plate 10 as a whole. A gradient ion exchange layer is disposed on the surface of the substrate layer 100 facing the crack-resistant layer 200 to enhance the structural strength of the substrate layer 100. Specifically, the gradient ion exchange layer includes a first ion exchange layer 110, a second ion exchange layer 120, and a third ion exchange layer 130. The first ion exchange layer 110, the second ion exchange layer 120, and the third ion exchange layer 130 are arranged sequentially on the surface of the substrate layer 100. The first ion exchange layer 110 is disposed on the surface side of the substrate layer 100, and the third ion exchange layer 130 is disposed on the interior side of the substrate layer 100. The first ion exchange layer 110 is configured as a shallow replacement layer with a high concentration of large ions, the second ion exchange layer 120 is configured as a middle replacement layer with a medium concentration of medium ions, and the third ion exchange layer 130 is configured as a deep replacement layer with a low concentration of low ions, thereby forming the overall gradient ion exchange layer. Based on this, the gradient ion exchange layer can achieve stress gradient matching optimization of the substrate layer 100. The first ion exchange layer 110, i.e., the shallow replacement layer, has ultra-high surface compressive stress, which can prevent the generation of microcracks. The second ion exchange layer 120, i.e., the middle replacement layer, has high surface compressive stress, which can prevent cracks from propagating to the deeper layers of the substrate. The third ion exchange layer 130, i.e., the deep replacement layer, has reduced ion replacement, and the compressive stress gradually transitions to the equilibrium state inside the substrate layer 100. Thus, the structural strength and impact resistance of the glass cover are effectively optimized.

[0029] Furthermore, the substrate layer 100 is made of composite microcrystalline glass substrate, and the thickness of the substrate layer 100 is set to 0.5-3 mm to support the main body and provide mechanical strength; while the thickness of the gradient ion exchange layer on the surface of the substrate layer 100 is set to 150-300 μm to form compressive stress on the surface of the substrate layer 100 to resist crack propagation. Specifically, the gradient ion exchange layer is formed by ion replacement reaction in a high-temperature mixed molten salt. In the shallow first ion exchange layer 110, due to the weak permeability of large ions, a high-concentration replacement zone is formed in this layer, thereby generating ultra-high surface compressive stress; in the middle second ion exchange layer 120, due to the deeper diffusion of ions, a sub-surface compressive stress zone is formed in this layer; in the deep third ion exchange layer 130, due to the reduction of ion replacement, the compressive stress gradually transitions to an equilibrium state inside the substrate layer 100.

[0030] Furthermore, the thickness of the third ion exchange layer 130 is set to be greater than 150 μm to balance the overall stress field inside the substrate layer 100; the thickness of the second ion exchange layer 120 is set to be 20-150 μm to prevent cracks from propagating to deeper layers; and the thickness of the third ion exchange layer 130 is set to be 1-20 μm to suppress the generation of microcracks on the surface of the substrate layer 100.

[0031] Furthermore, the crack-resistant layer 200 includes a crack-resistant microstructure portion 210 and an edge stress portion 220. The crack-resistant microstructure portion 210 is disposed in the main body of the crack-resistant layer 200, and the edge stress portion 220 is disposed at the edge of the crack-resistant microstructure portion 210. Specifically, the surface of the crack-resistant microstructure portion 210 is provided with spider web-like grooves to guide the direction of crack propagation, reduce stress concentration, and convert point impacts into surface loads, thereby reducing stress peaks. The edge stress portion 220 uses a CO2 laser to scan the edge region at a speed of 500 mm / s to form a temperature gradient annealing zone. From the edge inwards within 3 mm, the compressive stress linearly decreases from 1 GPa to 500 MPa, effectively preventing edge cracking.

[0032] Furthermore, the surface functional coating 300 includes a diamond-like carbon (DLC) coating 310 and a self-healing coating 320. The DLC coating 310 is disposed on the surface of the crack-resistant layer 200, and the self-healing coating 320 is disposed on the surface of the DLC coating 310. The DLC coating 310 is formed by sputtering and can provide excellent hardness performance; the self-healing coating 320 is used to provide crack repair function.

[0033] In summary, the high-strength glass cover plate gradient ion exchange layer disclosed in this invention enhances the structural strength of the substrate layer. Specifically, the first ion exchange layer is configured as a shallow replacement layer with a high concentration of large ions, the second ion exchange layer is configured as a medium replacement layer with a medium concentration of medium ions, and the third ion exchange layer is configured as a deep replacement layer with a low concentration of low ions, thus forming a gradient ion exchange layer as a whole. Based on this, the gradient ion exchange layer can achieve stress gradient matching optimization of the substrate layer. The first ion exchange layer, i.e., the shallow replacement layer, has ultra-high surface compressive stress, which can suppress the generation of microcracks; the second ion exchange layer, i.e., the medium replacement layer, has high surface compressive stress, which can prevent cracks from propagating into the deeper layers of the substrate; the third ion exchange layer, i.e., the deep replacement layer, has reduced ion replacement, and the compressive stress gradually transitions to an equilibrium state within the substrate layer, thereby effectively optimizing the structural strength and impact resistance of the glass cover plate.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A high-strength glass cover plate, characterized in that, include: The high-strength glass cover consists of a substrate layer, a crack-resistant layer, and a surface functional coating, which are stacked sequentially to form the entire high-strength glass cover. A gradient ion exchange layer is disposed on the surface of the substrate layer, and the gradient ion exchange layer is disposed on the side surface of the substrate layer facing the crack-resistant layer; The gradient ion exchange layer includes a first ion exchange layer, a second ion exchange layer, and a third ion exchange layer, which are sequentially arranged on the surface of the substrate layer. The first ion exchange layer is disposed on one side of the surface of the substrate layer, and the third ion exchange layer is disposed on one side of the interior of the substrate layer.

2. The high-strength glass cover plate according to claim 1, characterized in that, The substrate layer is made of composite microcrystalline glass substrate.

3. The high-strength glass cover plate according to claim 2, characterized in that, The thickness of the substrate layer is set to 0.5-3 mm.

4. The high-strength glass cover plate according to claim 3, characterized in that, The thickness of the gradient ion exchange layer is set to 150-300 μm.

5. The high-strength glass cover plate according to claim 4, characterized in that, The thickness of the third ion exchange layer is set to be greater than 150 μm.

6. The high-strength glass cover plate according to claim 5, characterized in that, The thickness of the second ion exchange layer is set to 20-150 μm.

7. The high-strength glass cover plate according to claim 6, characterized in that, The thickness of the third ion exchange layer is set to 1-20 μm.

8. The high-strength glass cover plate according to claim 7, characterized in that, The crack-resistant layer includes a crack-resistant microstructure and an edge stress portion. The crack-resistant microstructure is disposed on the main body of the crack-resistant layer, and the edge stress portion is disposed at the edge of the crack-resistant microstructure.

9. The high-strength glass cover plate according to claim 8, characterized in that, The crack resistance is achieved by providing spiderweb-like grooves on the surface of the structural parts.

10. The high-strength glass cover plate according to claim 9, characterized in that, The surface functional coating includes a diamond-like carbon (DLC) coating and a self-healing coating. The DLC coating is disposed on the surface of the crack-resistant layer, and the self-healing coating is disposed on the surface of the DLC coating.

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