Toughened glass fabrication method and toughened glass fabricated thereby
View Patent ↗A toughened glass fabrication method in which the productivity of a large toughened glass and the strength variation of the toughened glass can be improved and a toughened glass fabricated thereby. The toughened glass fabrication method includes the steps of mounting jigs on an upper surface and an undersurface of a raw glass such that an injection space through which a gel-type salt mixture is to be injected is defined between each of the jigs and the raw glass, injecting the gel-type salt mixture into the injection spaces, and heat-treating the raw glass on which the jigs are mounted.
1. A toughened glass fabrication method comprising:
mounting jigs on an upper surface and an undersurface of a raw glass such that an injection space through which a salt mixture gel is to be injected is defined between each of the jigs and the raw glass, thereby dispensing with a salt mixture containing bath for dipping the raw glass therein;
injecting the salt mixture gel into the injection spaces; and
heat-treating the raw glass on which the jigs are mounted.
2. The toughened glass fabrication method of claim 1 , wherein the salt mixture gel comprises an alkali metal ion salt and an inorganic oxide.
3. The toughened glass fabrication method of claim 2 , wherein the alkali metal ion salt comprises at least one selected from the group consisting of a nitride, a chloride and a sulfate.
4. The toughened glass fabrication method of claim 3 , wherein the alkali metal ion salt comprises potassium nitrate (KNO 3 ).
5. The toughened glass fabrication method of claim 1 , wherein heat-treating the raw glass comprises heat-treating the raw glass at a temperature ranging from 200 to 740° C.
6. The toughened glass fabrication method of claim 1 , further comprising cooling the raw glass after heat-treating the raw glass.
7. The toughened glass fabrication method of claim 6 , further comprising, after cooling the raw glass, removing the jigs from the raw glass and then cleaning the raw glass.
8. The toughened glass fabrication method of claim 1 , wherein heat-treating the raw glass comprises heat-treating the raw glass on which the jigs are mounted in a heating chamber,
wherein the raw glass comprises a plurality of raw glasses on which the jigs are mounted, the plurality of raw glasses being laid down and stacked on each other inside the heating chamber.