Aluminosilicate glass for touch screen

1. An antibacterial strengthened aluminosilicate glass plate, comprising the following components, calculated based upon weight percentage (wt %), of:

SiO 2

55 to 65

Na 2 O

greater than 12 to 17

Al 2 O 3

16.5 to 20 

K 2 O

  2 to 4.4

MgO

3.9 to 10 

ZrO 2

0 to 5

ZnO

0 to 4

CaO

0 to 4

Na 2 O + K 2 O + MgO + ZnO + CaO

15 to 28

SnO 2

0 to 1

TiO 2 + CeO 2

less than or equal to 1,

wherein the aluminosilicate glass plate has been subjected to ion exchange strengthening in a 100% KNO 3 salt bath for a period of time from 0.5 to 16 hours after preheating to a temperature from 370° C. to 430° C.,

wherein silver nitrate is added to the KNO 3 salt bath at a weight percentage of 0.1 to 15% based on a total weight of molten salt, and

wherein the aluminosilicate glass plate is free of B 2 O 3 .

2. The aluminosilicate glass plate according to claim 1 , wherein SiO 2 has an amount of 58 to 63 wt %.

3. The aluminosilicate glass plate according to claim 1 , wherein Na 2 O has an amount of greater than 12 to 15 wt %.

4. The aluminosilicate glass plate according to claim 1 , wherein K 2 O has an amount of 3 to 4.4 wt %.

5. The aluminosilicate glass plate according to claim 1 , wherein Al 2 O 3 has an amount of 16.5 to 17 wt %.

6. The aluminosilicate glass plate according to claim 1 , wherein MgO has an amount of 3.9 to 8.0 wt %.

7. The aluminosilicate glass plate according to claim 1 , wherein ZnO and CaO each have an amount of lower than 2 wt %.

8. The aluminosilicate glass plate according to claim 1 , wherein ZrO 2 has an amount of 0.1 to 3 wt %.

9. The aluminosilicate glass plate according to claim 1 , wherein the sum of the amounts of components Na 2 O +K 2 O +MgO +ZnO +CaO is 15 to 25 wt %.

10. The aluminosilicate glass plate according to claim 1 , wherein the temperature ranges from 390 to 410° C. and the treatment time ranges from 1 to 3hours.

11. The aluminosilicate glass plate according to claim 1 , wherein, after ion exchange, the aluminosilicate glass plate has a compressive stress of 600 to 1000 MPa.

12. The aluminosilicate glass plate according to claim 1 , wherein, after ion exchange, the aluminosilicate glass plate has a depth of ion exchange layer (DoL) of 10 to 80 μm.

13. The aluminosilicate glass plate according to claim 12 , wherein, after ion exchange, the aluminosilicate glass plate has a DoL of 10 to 20 μm.

14. The aluminosilicate glass plate according to claim 1 , wherein, after ion exchange, the aluminosilicate glass plate with a thickness of 0.3 mm has a breakage height of ball drop strength test of 200 to 400 mm and a ring-on-ring breakage force of 400 to 1000 N.

15. The aluminosilicate glass plate according to claim 1 , wherein, after ion exchange, the aluminosilicate glass plate with a thickness of 0.5 mm has a breakage height of ball drop strength test of 300 to 500 mm and a ring-on-ring breakage force of 500 to 1,200 N.

16. The aluminosilicate glass plate according to claim 1 , wherein, after ion exchange, the aluminosilicate glass plate with a thickness of 0.7 mm has a breakage height of ball drop strength test of 400 to 1,000 mm and a ring-on-ring breakage force of 1,000 to 4,000 N.

17. The aluminosilicate glass plate according to claim 1 , wherein, after ion exchange, the aluminosilicate glass plate has a central tension that is lower than 60 MPa.

18. The aluminosilicate glass plate according to claim 1 , wherein, after ion exchange, the aluminosilicate glass plate has a central tension that is lower than 30 MPa.

19. The aluminosilicate glass plate according to claim 1 , wherein the plate is a float glass plate.

20. The aluminosilicate glass plate according to claim 1 , wherein the plate has a thickness of 0.5 mm to 20 mm.

21. The aluminosilicate glass plate according to claim 1 , wherein the plate is a down-draw plate.

22. The aluminosilicate glass plate according to claim 21 , wherein the plate has a thickness from 0.1 to 1.5 mm.

23. The aluminosilicate glass plate according to claim 1 , wherein the aluminosilicate glass plate is used as a touch screen.

24. The aluminosilicate glass plate according to claim 1 , wherein the aluminosilicate glass plate is used in a mobile electronic device.

25. An antibacterial strengthened aluminosilicate glass plate comprising the following components, calculated based upon weight percentage (wt %):

SiO 2

56 to 64

Na 2 O

12.1 to 16.5

Al 2 O 3

16.5 to 19.0

K 2 O

2.5 to 4.4

MgO

3.9 to 9.0

ZrO 2

0 to 5

ZnO

0 to 4

CaO

0 to 4

Na 2 O + K 2 O + MgO + ZnO + CaO

15 to 28

SnO 2

0 to 1

TiO 2 + CeO 2

less than or equal to 1,

wherein the aluminosilicate glass plate has been subjected to ion exchange strengthening in a 100% KNO 3 salt bath for a period of time from 0.5 to 16 hours after preheating to a temperature from 370° C. to 430° C.,

wherein silver nitrate is added to the KNO 3 salt bath at a weight percentage of 0.1 to 15% based on a total weight of molten salt, and

wherein the aluminosilicate glass plate is free of B 2 O 3 .

26. An antibacterial strengthened aluminosilicate glass plate comprising the following components, calculated based upon weight percentage (wt %):

SiO 2

57 to 63

Na 2 O

12.1 to 16.0

Al 2 O 3

16.5 to 18.5

K 2 O

2.8 to 4.4

MgO

4.0 to 9.0

ZrO 2

0 to 5

ZnO

0 to 4

CaO

0 to 4

Na 2 O + K 2 O + MgO + ZnO + CaO

15 to 28

SnO 2

0 to 1

TiO 2 + CeO 2

less than or equal to 1,

wherein the aluminosilicate glass plate has been subjected to ion exchange strengthening in a 100% KNO 3 salt bath for a period of time from 0.5 to 16 hours after preheating to a temperature from 370° C. to 430° C.,

wherein silver nitrate is added to the KNO 3 salt bath at a weight percentage of 0.1 to 15% based on a total weight of molten salt, and

wherein the aluminosilicate glass plate is free of B 2 O 3 .