CN113105121A - 3D glass cover plate and manufacturing method thereof - Google Patents
3D glass cover plate and manufacturing method thereof Download PDFInfo
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- CN113105121A CN113105121A CN202010031265.3A CN202010031265A CN113105121A CN 113105121 A CN113105121 A CN 113105121A CN 202010031265 A CN202010031265 A CN 202010031265A CN 113105121 A CN113105121 A CN 113105121A
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- Prior art keywords
- glass
- cover plate
- manufacturing
- glass cover
- side wall
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C15/00—Surface treatment of glass, not in the form of fibres or filaments, by etching
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/20—Uniting glass pieces by fusing without substantial reshaping
- C03B23/203—Uniting glass sheets
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B25/00—Annealing glass products
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
- C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
- C03C21/002—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to perform ion-exchange between alkali ions
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
The invention relates to a 3D glass cover plate and a manufacturing method thereof, wherein the manufacturing method comprises the following steps: preparing bottom plate glass and side wall glass for enclosing the edge of the bottom plate glass; performing surface activation treatment on at least to-be-connected parts of the bottom plate glass and the side wall glass, wherein the surface activation treatment can enable the bottom plate glass and the side wall glass to form hydrogen bond connection on a contact surface after being abutted; the bottom plate glass and the side wall glass are abutted and heated for fusion welding. The surface activation effect is achieved by processing the part to be connected in an activation mode, the activation surface can form hydrogen bond connection after being attached, and the hydrogen bond forms Si-O bond connection under the ion diffusion condition under the high-temperature condition, so that glass is welded without adopting solder, and the requirement on equipment is low.
Description
Technical Field
The invention relates to the field of electronic product shells, in particular to a 3D glass cover plate and a manufacturing method thereof.
Background
With the increasing demands of people on the appearance and functions of electronic communication products such as mobile phones and the increasing maturity of related technologies, more and more electronic communication products use 3D glass as a front cover plate or a rear cover plate. The processing mode of the 3D glass cover plate commonly adopted in the industry at present is hot bending and mechanical processing. The 3D hot bending technology is high in production cost, the produced 3D glass cover plate is prone to generating defects such as concave and convex points, the inner side wall and the concave surface of the glass need to be machined in a machining mode, the process is complex, and the yield is low. In addition, there are processes for preparing 3D cover glass by fusion bonding, such as the fusion bonding processes mentioned in patents CN108262679A and CN108381053A, but these fusion bonding methods require the use of solder for fusion bonding, and the solder needs to be formed on the glass by vapor deposition or evaporation, which requires very high equipment requirements.
Disclosure of Invention
Accordingly, there is a need for a 3D glass cover plate and a method for manufacturing the same that requires less equipment without using solder for fusing.
A manufacturing method of a 3D glass cover plate comprises the following steps:
performing surface activation treatment on at least a part to be connected of the bottom plate glass and a part to be connected of the side wall glass;
abutting the part to be connected of the bottom plate glass and the part to be connected of the side wall glass, and forming hydrogen bond connection between the bottom plate glass and the side wall glass at a contact surface to form a connector;
and heating and welding the connecting body.
In one embodiment, the surface activation treatment is performed by soaking with an acid solution, an alkali solution, or an alkali metal organic acid salt solution.
In one embodiment, the acid solution is one or more of hydrofluoric acid, sulfuric acid, hydrochloric acid, nitric acid, and perchloric acid.
In one embodiment, the alkali liquor is at least one of sodium hydroxide and potassium hydroxide;
the alkali metal organic acid salt solution is at least one selected from sodium methoxide, sodium ethoxide and butyl lithium.
In one embodiment, the surface activation treatment is a soaking treatment with an oxidizing agent.
In one embodiment, the oxidant is H2O2One or more of potassium permanganate and hypochlorous acid.
In one embodiment, the temperature of the soaking treatment is 25-90 ℃, and the soaking time is 2-60 min.
In one embodiment, after the bottom plate glass and the side wall glass are abutted, the connector is maintained under the air pressure of 0.5MPa to 1MPa for 10min to 30 min.
In one embodiment, the temperature of the heat welding is 650-800 ℃.
In one embodiment, after the step of fusing, the method further comprises the following steps: and annealing the welded product.
In one embodiment, the temperature of the annealing treatment is 600-900 ℃, and the time is 0.5-2.0 h.
In one embodiment, the manufacturing method further comprises the following steps: and placing the product subjected to the annealing treatment in toughened molten salt for chemical strengthening treatment.
A3D glass cover plate is manufactured by the manufacturing method of any one of the embodiments.
Compared with the prior art, the 3D glass cover plate and the manufacturing method thereof have the following beneficial effects:
the 3D glass cover plate and the manufacturing method thereof treat the mode of activating the to-be-connected part to achieve the effect of surface activation, so that the activated surface can form hydrogen bond connection after being attached, and the hydrogen bond forms Si-O bond connection under the condition of ion diffusion at high temperature, thereby realizing the fusion connection of glass, avoiding adopting solder for fusion connection, and having lower requirements on equipment.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the following examples. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The manufacturing method of the 3D glass cover plate provided by the embodiment of the invention comprises the following steps:
firstly, surface activation treatment is carried out on at least a part to be connected of the bottom plate glass and a part to be connected of the side wall glass.
The 3D glass cover plate can be regarded as formed by combining 2D sheet-shaped bottom plate glass and peripheral side wall glass, and the side wall glass is used for enclosing the edge of the bottom plate glass.
The side wall glass can cooperate with the bottom plate glass to form a containing groove for containing internal components of an electronic product, such as a display module, 2D sheet-shaped bottom plate glass can be firstly carved into a required size structure, and then a required 3D glass cover plate can be prepared in a welding mode.
The surface activation treatment enables the bottom plate glass and the side wall glass to form hydrogen bonds at the contact surface after being abutted.
And secondly, abutting the part to be connected of the bottom plate glass and the part to be connected of the side wall glass, and forming hydrogen bond connection on the contact surface of the bottom plate glass and the side wall glass to form a connector.
And step three, heating and welding the connecting body.
The method for activating the parts to be connected achieves the effect of surface activation, so that the activated surfaces can form hydrogen bond connection after being attached, and the hydrogen bond forms Si-O bond connection under the condition of ion diffusion at high temperature, thereby realizing the fusion of glass.
In one example, the surface activation treatment is performed by soaking with an acid solution.
Wherein, the acid is strong acid. In one example, the acid is one or more of hydrofluoric acid, sulfuric acid, hydrochloric acid, nitric acid, perchloric acid.
In one example, the surface activation treatment is performed by soaking with an alkali solution or an alkali metal organic acid salt solution.
The alkali is strong alkali. In one example, the alkali is at least one of sodium hydroxide and potassium hydroxide.
In one example, the alkali metal organic acid salt solution is selected from at least one of sodium methoxide, sodium ethoxide, and butyl lithium.
In one example, the surface activation treatment is carried out by soaking with an oxidizing agent.
The oxidant is a strong oxidant. In one example, the oxidant is H2O2One or more of potassium permanganate and hypochlorous acid.
In one example, in the second step, the soaking temperature is 25-90 ℃, and the soaking time is 2-60 min.
Further, in one example, in the second step, the soaking temperature is 50 ℃ to 90 ℃, and the soaking time is 20min to 40 min.
And thirdly, abutting the bottom plate glass and the side wall glass, and heating for welding.
In one example, the pressure is maintained at 0.5 to 1MPa for 10 to 30 minutes while the bottom plate glass and the side wall glass are brought into contact with each other.
In one example, in step three, the temperature of the fusion is 650 ℃ to 800 ℃. The heat preservation time can be selected to be 0.5 h-2 h.
Further, in one example, in step three, the temperature of the fusion is 700 ℃ to 750 ℃.
In one example, after the step of fusing, the method for manufacturing the 3D glass cover plate further comprises a step of annealing the fused product to eliminate residual stress in the product.
In one example, the annealing temperature is 600-900 ℃ and the time is 0.5-2 h.
In one example, the manufacturing method of the 3D glass cover plate further comprises the step of placing the annealed product in a tempering molten salt for chemical strengthening.
In one example, before the step of chemically strengthening, the method for manufacturing the 3D glass cover plate further comprises a step of finishing the annealed product to form a structure with a required size. The finish machining process can adopt CNC and the like.
In one example, after the step of finishing, and before the step of chemically strengthening, the method of making a 3D glass cover plate further comprises the step of polishing the finished product.
In one example, after the step of chemically strengthening, the method of making a 3D glass cover plate further comprises the step of evaluating the chemically strengthened product.
Furthermore, the invention also provides a 3D glass cover plate which is manufactured by the manufacturing method in any one of the above examples.
The method for manufacturing the 3D glass cover plate according to the present invention is further described with reference to the following embodiments.
Example 1
The embodiment provides a manufacturing method of a 3D glass cover plate, which comprises the following steps:
step S1, cutting: and cutting a large glass raw material into glass white sheets with the cover plate size as bottom plate glass, and using strip-shaped glass corresponding to the arc height of the 3D cover plate glass as side wall glass.
Step S2, finishing: and finishing the plurality of glass white sheets to a required appearance and size.
Step S3, surface activation treatment: and cleaning the processed glass, and then carrying out surface activation treatment. Soak in hydrofluoric acid solution at 25 deg.C for 5 min.
Step S4, welding: and (3) laminating a plurality of pieces of bottom plate glass and side wall glass according to preset positions, maintaining the pressure for 10min under the air pressure of 1MPa, heating for fusion welding, wherein the fusion welding temperature is 800 ℃, and the heat preservation time is 0.5h, so that the 3D glass cover plate blank is formed.
Step S5, annealing: and annealing the 3D glass cover plate blank to remove residual stress. The annealing temperature is 900 ℃ and the annealing time is 2 h.
Step S6, finishing: and performing finish machining on the 3D glass cover plate blank to obtain a required size structure.
Step S7, polishing: and polishing the front and back surfaces of the blank glass to achieve the required appearance effect.
Step S8, strengthen: and placing the polished 3D cover plate in toughened molten salt for chemical strengthening.
Step S9, cleaning: and cleaning the chemically strengthened 3D cover plate glass to obtain the 3D mobile phone glass cover plate.
Example 2
The embodiment provides a manufacturing method of a 3D glass cover plate, which comprises the following steps:
step S1, cutting: and cutting a large glass raw material into glass white sheets with the cover plate size as bottom plate glass, and using strip-shaped glass corresponding to the arc height of the 3D cover plate glass as side wall glass.
Step S2, finishing: and finishing the plurality of glass white sheets to a required appearance and size.
Step S3, surface activation treatment: and cleaning the processed glass, and then carrying out surface activation treatment. The mixture was soaked with sodium hydroxide solution at 90 ℃ for 45 minutes.
Step S4, welding: and (3) laminating a plurality of pieces of bottom plate glass and side wall glass according to preset positions, maintaining the pressure for 20min under the air pressure of 0.7MPa, heating for fusion welding, wherein the fusion welding temperature is 800 ℃, and the heat preservation time is 1h, so that the 3D glass cover plate blank is formed.
Step S5, annealing: and annealing the 3D glass cover plate blank to remove residual stress. The annealing temperature is 600 ℃ and the annealing time is 1 h.
Step S6, finishing: and performing finish machining on the 3D glass cover plate blank to obtain a required size structure.
Step S7, polishing: and polishing the front and back surfaces of the blank glass to achieve the required appearance effect.
Step S8, strengthen: and placing the polished 3D cover plate in toughened molten salt for chemical strengthening.
Step S9, cleaning: and cleaning the chemically strengthened 3D cover plate glass to obtain the 3D mobile phone glass cover plate.
Example 3
The embodiment provides a manufacturing method of a 3D glass cover plate, which comprises the following steps:
step S1, cutting: and cutting a large glass raw material into glass white sheets with the cover plate size as bottom plate glass, and using strip-shaped glass corresponding to the arc height of the 3D cover plate glass as side wall glass.
Step S2, finishing: and finishing the plurality of glass white sheets to a required appearance and size.
Step S3, surface activation treatment: and cleaning the processed glass, and then carrying out surface activation treatment. The mixture was soaked with a potassium hydroxide solution at 50 ℃ for 40 minutes.
Step S4, welding: and (3) adhering a plurality of pieces of bottom plate glass and side wall glass according to preset positions, maintaining the pressure for 30min under the air pressure of 0.5MPa, heating for fusion welding, wherein the fusion welding temperature is 650 ℃, and the heat preservation time is 2h, so that the 3D glass cover plate blank is formed.
Step S5, annealing: and annealing the 3D glass cover plate blank to remove residual stress. The annealing temperature is 800 ℃ and the annealing time is 0.5 h.
Step S6, finishing: and performing finish machining on the 3D glass cover plate blank to obtain a required size structure.
Step S7, polishing: and polishing the front and back surfaces of the blank glass to achieve the required appearance effect.
Step S8, strengthen: and placing the polished 3D cover plate in toughened molten salt for chemical strengthening.
Step S9, cleaning: and cleaning the chemically strengthened 3D cover plate glass to obtain the 3D mobile phone glass cover plate.
Example 4
The embodiment provides a manufacturing method of a 3D glass cover plate, which comprises the following steps:
step S1, cutting: and cutting a large glass raw material into glass white sheets with the cover plate size as bottom plate glass, and using strip-shaped glass corresponding to the arc height of the 3D cover plate glass as side wall glass.
Step S2, finishing: and finishing the plurality of glass white sheets to a required appearance and size.
Step S3, surface activation treatment: and cleaning the processed glass, and then carrying out surface activation treatment. Soaking in hydrogen peroxide solution at 25 deg.c for 60 min.
Step S4, welding: and (3) laminating a plurality of pieces of bottom plate glass and side wall glass according to preset positions, maintaining the pressure for 10min under the air pressure of 1MPa, heating for fusion welding, wherein the fusion welding temperature is 700 ℃, and the heat preservation time is 2h, so that a 3D glass cover plate blank is formed.
Step S5, annealing: and annealing the 3D glass cover plate blank to remove residual stress. The annealing temperature is 900 ℃ and the annealing time is 2 h.
Step S6, finishing: and performing finish machining on the 3D glass cover plate blank to obtain a required size structure.
Step S7, polishing: and polishing the front and back surfaces of the blank glass to achieve the required appearance effect.
Step S8, strengthen: and placing the polished 3D cover plate in toughened molten salt for chemical strengthening.
Step S9, cleaning: and cleaning the chemically strengthened 3D cover plate glass to obtain the 3D mobile phone glass cover plate.
Example 5
The embodiment provides a manufacturing method of a 3D glass cover plate, which comprises the following steps:
step S1, cutting: and cutting a large glass raw material into glass white sheets with the cover plate size as bottom plate glass, and using strip-shaped glass corresponding to the arc height of the 3D cover plate glass as side wall glass.
Step S2, finishing: and finishing the plurality of glass white sheets to a required appearance and size.
Step S3, surface activation treatment: and cleaning the processed glass, and then carrying out surface activation treatment. Soaking in hydrogen peroxide at 40 deg.c for 40 min.
Step S4, welding: and (3) laminating a plurality of pieces of bottom plate glass and side wall glass according to preset positions, maintaining the pressure for 20min under the air pressure of 0.7MPa, heating for fusion welding, wherein the fusion welding temperature is 800 ℃, and the heat preservation time is 1h, so that the 3D glass cover plate blank is formed.
Step S5, annealing: and annealing the 3D glass cover plate blank to remove residual stress. The annealing temperature is 600 ℃ and the annealing time is 2 h.
Step S6, finishing: and performing finish machining on the 3D glass cover plate blank to obtain a required size structure.
Step S7, polishing: and polishing the front and back surfaces of the blank glass to achieve the required appearance effect.
Step S8, strengthen: and placing the polished 3D cover plate in toughened molten salt for chemical strengthening.
Step S9, cleaning: and cleaning the chemically strengthened 3D cover plate glass to obtain the 3D mobile phone glass cover plate.
Control experiment
The preparation method of the control experiment comprises the following steps:
step S1, cutting: and cutting a large glass raw material into glass white sheets with the cover plate size as bottom plate glass, and using strip-shaped glass corresponding to the arc height of the 3D cover plate glass as side wall glass.
Step S2, finishing: and finishing the plurality of glass white sheets to a required appearance and size.
Step S3, welding: and (3) laminating a plurality of pieces of bottom plate glass and side wall glass according to preset positions, maintaining the pressure for 10min under the air pressure of 1MPa, heating for fusion welding, wherein the fusion welding temperature is 800 ℃, and the heat preservation time is 0.5h, so that the 3D glass cover plate blank is formed.
Step S4, annealing: and annealing the 3D glass cover plate blank to remove residual stress. The annealing temperature is 900 ℃ and the annealing time is 2 h.
Step S5, finishing: and performing finish machining on the 3D glass cover plate blank to obtain a required size structure.
Step S6, polishing: and polishing the front and back surfaces of the blank glass to achieve the required appearance effect.
Step S7, strengthen: and placing the polished 3D cover plate in toughened molten salt for chemical strengthening.
Step S8, cleaning: and cleaning the chemically strengthened 3D cover plate glass to obtain the 3D mobile phone glass cover plate.
The welding effects of the examples and the control are shown in table 1.
TABLE 1
| Examples | Effect of welding |
| Example 1 | No crack, no bubble, close welding |
| Example 2 | No crack, no bubble, close welding |
| Example 3 | No crack, no bubble, close welding |
| Example 4 | No crack, no bubble, close welding |
| Example 5 | No cracks and noBubble, tight fusion |
| Control experiment | No cracks, few bubbles, no local fusion |
The 3D glass cover plate and the manufacturing method thereof treat the mode of activating the to-be-connected part to achieve the effect of surface activation, so that the activated surface can form hydrogen bond connection after being attached, and the hydrogen bond forms Si-O bond connection under the condition of ion diffusion at high temperature, thereby realizing the fusion connection of glass, avoiding adopting solder for fusion connection, and having lower requirements on equipment.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (13)
1. The manufacturing method of the 3D glass cover plate is characterized by comprising the following steps:
performing surface activation treatment on at least a part to be connected of the bottom plate glass and a part to be connected of the side wall glass;
abutting the part to be connected of the bottom plate glass and the part to be connected of the side wall glass, and forming hydrogen bond connection between the bottom plate glass and the side wall glass at a contact surface to form a connector;
and heating and welding the connecting body.
2. The method for manufacturing a 3D glass cover plate according to claim 1, wherein the surface activation treatment is performed by soaking in an acid solution, an alkali solution, or an alkali metal organic acid salt solution.
3. The method for manufacturing a 3D glass cover plate according to claim 2, wherein the acid solution is one or more of hydrofluoric acid, sulfuric acid, hydrochloric acid, nitric acid and perchloric acid.
4. The method for manufacturing a 3D glass cover plate according to claim 2, wherein the alkali solution is at least one of sodium hydroxide and potassium hydroxide;
the alkali metal organic acid salt solution is at least one selected from sodium methoxide, sodium ethoxide and butyl lithium.
5. The method for making a 3D glass cover plate according to claim 1, wherein the surface activation treatment is a soaking treatment with an oxidizing agent.
6. The method of claim 5, wherein the oxidizing agent is H2O2One or more of potassium permanganate and hypochlorous acid.
7. The method for manufacturing the 3D glass cover plate according to any one of claims 2 to 5, wherein the temperature of the soaking treatment is 25 ℃ to 90 ℃, and the soaking time is 2min to 60 min.
8. The method for manufacturing a 3D glass cover plate according to any one of claims 1 to 5, wherein the pressure of the connector is maintained at 0.5MPa to 1MPa for 10min to 30min after the bottom plate glass and the side wall glass are brought into contact with each other.
9. The method for manufacturing the 3D glass cover plate according to any one of claims 1 to 5, wherein the temperature for the heat welding is 650 ℃ to 800 ℃.
10. The method for manufacturing a 3D glass cover plate according to any one of claims 1 to 5, further comprising, after the step of fusing, the steps of: and annealing the welded product.
11. The method for manufacturing a 3D glass cover plate according to claim 10, wherein the annealing is performed at a temperature of 600 ℃ to 900 ℃ for 0.5h to 2.0 h.
12. The method of making a 3D glass cover plate of claim 11, further comprising the steps of: and placing the product subjected to the annealing treatment in toughened molten salt for chemical strengthening treatment.
13. A 3D glass cover plate manufactured by the manufacturing method according to any one of claims 1 to 12.
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