TWI510443B - Method for increasing strengthening behavior of glass - Google Patents

Description

Glass component strengthening treatment method

The invention relates to the field of glass, and in particular to a method for strengthening a glass component capable of improving the reinforcing performance of a glass component.

Glass components, such as display screens, touch panels, etc., are widely used in handheld electronic devices such as mobile phones and tablet computers. The strength level of the glass component is closely related to the possibility of failure of the glass component. For example, the lower the strength of the glass component, the easier it is to be damaged by dropping, collision or other improper operation, and the greater the possibility of internal failure. . Therefore, in order to reduce the possibility that the glass component is damaged after the drop, collision or other improper operation of the handheld electronic device, it is necessary to strengthen the glass member to enhance the strength of the glass member. However, the compressive stress of glass components is still low after being traditionally reinforced by the industry.

In view of the above, it is necessary to provide a glass member reinforced treatment method capable of improving compressive stress.

A glass component strengthening treatment method comprising: obtaining the glass component; annealing the glass component, comprising: heating the glass component to a first temperature exceeding an annealing point of the glass component, and maintaining the first temperature for a predetermined first time Cooling the glass member to a second temperature below the strain point temperature of the glass member and maintaining the second temperature for a predetermined second amount of time; and cooling the glass member to room temperature; and chemically strengthening the glass member .

Compared with the prior art, the glass component strengthening treatment method provided by the present invention firstly anneals the glass component and then chemically strengthens the glass component, and not only directly compresses the glass component without chemical treatment, but also has high compressive stress. And can maintain the depth of the layer.

200‧‧‧Chemical strengthening bath

100‧‧‧Anealed glass parts

102‧‧‧Enhanced surface

FIG. 1 is a flow chart of a glass member strengthening treatment method according to an embodiment of the present invention.

2 is a schematic view showing an annealing curve when annealing a glass member in the glass strengthening treatment method of FIG. 1.

Fig. 3 is a schematic view showing the chemical strengthening of a glass member in the glass strengthening treatment method of Fig. 1.

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Please refer to FIG. 1 , which is a flowchart of a method for strengthening a glass component according to an embodiment of the present invention. Wherein, the glass component strengthening treatment method comprises the following steps:

Step S102: forming a glass member. The formation of the glass member can be achieved by a thermoforming process, a melting process, or a float process. Among them, the float process usually floats the molten glass on the surface of the molten metal (for example, tin) and allows the molten glass to cool. The melting process typically involves blending the feedstock into a glass composition that is melted and conditioned to create a molten glass. The molten glass is fed into the grooves until the molten glass flows uniformly over the sides of the grooves. The glass is then rejoined or melted and dragged down to form a continuous flat glass sheet, thereby forming the glass sheet into the air from the overflow trench of the molten glass. Additionally, forming the glass member can include the act of machining the glass sheet. In particular, machining the glass sheet can include scribing, splitting, cutting, grinding, and/or polishing the glass part from the glass sheet. In the present embodiment, the glass nitrate of the glass member is an aluminosilicate glass.

Step S104: annealing the glass member. Referring to FIG. 2, annealing the glass member specifically includes the following steps: first, heating the glass member to a first temperature T1 exceeding the annealing point of the glass member, and maintaining the first temperature T1 for a predetermined first amount of time t1 . Wherein, the first temperature T1 is in a range between 550 degrees Celsius and 750 degrees Celsius; the first time amount t1 is in a range between 30 minutes and 60 minutes. Next, the glass member is cooled to a second temperature T2 that is lower than the strain point temperature of the glass member, and the second temperature T2 is maintained for a predetermined second amount of time t2. Wherein, the second temperature T2 is less than the first temperature T1 by about 100 degrees Celsius and 150 degrees Celsius, and the second time amount is in a range between 30 minutes and 60 minutes. Finally, the glass part was cooled to room temperature.

Step S106: performing a chemical strengthening treatment on the glass member. Referring to FIG. 3, the chemical strengthening treatment of the glass member specifically includes the following steps: First, a chemical strengthening bath 200 is provided, which is a potassium nitrate salt bath. Next, an additive is added to the chemical strengthening bath 200, and the additive is lithium nitrate, sodium nitrite, sodium nitrate or cerium nitrate. Finally, the annealed glass member 100 is immersed in a chemical strengthening bath 200 to which an additive is added to promote exchange of ions included in the glass member with ions included in the chemical strengthening bath. Specifically, the potassium ions in the chemical strengthening bath 200 are exchanged with the sodium ions in the annealed glass member 100, and ion exchange produces a strengthening surface 102 on the annealed glass member 100. The strengthened surface 102 has a higher compressive stress (CS) than a reinforced surface formed by direct chemical strengthening treatment of the glass member without the above annealing step, and can maintain a depth of layer (DOL). ).

The glass component strengthening treatment method provided by the invention firstly anneals the glass component and then chemically strengthens the treatment, and not only directly compresses the glass component without chemical treatment, but also has high compressive stress, and can maintain strong chemical strength. Layer depth. In addition, during the annealing process, maintaining the first temperature for a predetermined first amount of time and maintaining the second temperature for a predetermined second amount of time are between 30 minutes and 60 minutes, The time required for the annealing process is shortened, thereby saving time in the process of strengthening the entire glass component.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

no

Claims (9)

A method for strengthening a glass component, comprising:
Forming the glass member;
Annealing the glass member, comprising: heating the glass member to a first temperature that exceeds an annealing point of the glass member, and maintaining the first temperature for a predetermined first amount of time; cooling the glass member below a strain point of the glass member a second temperature of the temperature, and maintaining the second temperature for a predetermined second amount of time; and cooling the glass member to room temperature; and chemically strengthening the glass member. The glass member strengthening treatment method according to claim 1, wherein the glass nitrate of the glass member is aluminosilicate glass. The glass member strengthening treatment method according to claim 1, wherein the step of obtaining the glass member comprises forming the glass member by a thermoforming process, a melting process or a float process. The glass member strengthening treatment method according to claim 1, wherein the first temperature is in a range between 550 degrees Celsius and 750 degrees Celsius. The glass member strengthening treatment method according to claim 4, wherein the first amount of time is in a range between 30 minutes and 60 minutes. The glass member strengthening treatment method according to claim 4, wherein the second temperature is less than the first temperature of about 100 degrees Celsius and 150 degrees Celsius. The glass member strengthening treatment method according to claim 1, wherein the second amount of time is in a range between 30 minutes and 60 minutes. The glass member strengthening treatment method according to claim 1, wherein the chemical strengthening treatment of the glass member comprises:
Providing a chemical strengthening bath;
Adding an additive to the chemical strengthening bath; and immersing the annealed glass member in a chemical strengthening bath to which an additive is added to promote exchange of ions included in the annealed glass member with ions included in the chemical strengthening bath. The glass member strengthening treatment method according to claim 8, wherein the chemical strengthening bath is a potassium nitrate salt bath, and the additive is lithium nitrate, sodium nitrite, sodium nitrate or cerium nitrate.