Glass-ceramic and substrate thereof
A glass ceramic contains the following components by wt %: 60 to 80% of SiO 2 ; 4 to 20% of Al 2 O 3 ; 0 to 15% of Li 2 O; more than 0 but less than or equal to 12% of Na 2 O; 0 to 5% of K 2 O; more than 0 but less than or equal to 5% of ZrO 2 ; 0 to 5% of P 2 O 5 ; and 0 to 10% of TiO 2 . A crystalline phase contains at least one of R 2 SiO 3 , R 2 Si 2 O 5 , R 2 TiO 3 , R 4 Ti 5 O 12 , R 3 PO 3 , RAlSi 2 O 6 , RAlSiO 4 O 10 , R 2 Al 2 Si 2 O 8 , R 4 Al 4 Si 5 O 18 , quartz and quartz solid solution. With a liquidus temperature below 1,450° C., a thermal conductivity above 2 w/m·k, and a Vickers hardness above 600 kgf/mm2, the glass ceramic is applicable to portable electronic devices and optical devices.
1. A glass ceramic, comprising, by wt %: 60 to 80% of SiO 2 ; 4 to 20% of Al 2 O 3 ; more than 0 but less than or equal to 15% of Li 2 O; more than 0 but less than or equal to 12% of Na 2 O; 0 to 5% of K 2 O; more than 0 but less than or equal to 5% of ZrO 2 ; 0 to 5% of P 2 O 5 ; and 0 to 10% of TiO 2 ; and
a crystalline phase containing LiAlSi 4 O 10 , quartz, and quartz solid solution,
wherein the quartz and the quartz solid solution crystalline phase account for 15 to 30% of the glass ceramic by wt %, the LiAlSi 4 O 10 crystalline phase accounts for not greater than 15% of the glass ceramic by wt %, and
wherein a ratio of ZrO 2 /Li 2 O is more than 0 but less than or equal to 0.35.
2. The glass ceramic according to claim 1 , further comprising more than 0 but less than or equal to 5% of B 2 O 3 ; and/or more than 0 but less than or equal to 2% of MgO; and/or more than 0 but less than or equal to 2% of ZnO; and/or more than 0 but less than or equal to 5% of CaO; and/or more than 0 but less than or equal to 5% of BaO; and/or more than 0 but less than or equal to 3% of FeO; and/or more than 0 but less than or equal to 2% of SnO 2 ; and/or more than 0 but less than or equal to 5% of SrO; and/or more than 0 but less than or equal to 10% of La 2 O 3 ; and/or more than 0 but less than or equal to 10% of Y 2 O 3 ; and/or to 10% of Nb 2 O 5 ; and/or more than 0 but less than or equal to 10% of Ta 2 O 5 ; and/or more than 0 but less than or equal to 5% of WO 3 .
3. The glass ceramic according to claim 1 , consisting of 60 to 80% of SiO 2 ; 4 to 20% of Al 2 O 3 ; more than 0 but less than or equal to 15% of Li 2 O; more than 0 but less than or equal to 12% of Na 2 O; more than 0 but less than or equal to 5% of ZrO 2 ; and one or more selected from the group consisting of more than 0 but less than or equal to 5% of P 2 O 5 , more than 0 but less than or equal to 10% of TiO 2 , more than 0 but less than or equal to 5% of B 2 O 3 , more than 0 but less than or equal to 5% of K 2 O, more than 0 but less than or equal to 2% of MgO, more than 0 but less than or equal to 2% of ZnO, more than 0 but less than or equal to 5% of CaO, more than 0 but less than or equal to 5% of BaO, more than 0 but less than or equal to 3% of FeO, more than 0 but less than or equal to 2% of SnO 2 , more than 0 but less than or equal to 5% of SrO, more than 0 but less than or equal to 10% of La 2 O 3 , more than 0 but less than or equal to 10% of Y 2 O 3 , more than 0 but less than or equal to 10% of Nb 2 O 5 , more than 0 but less than or equal to 10% of Ta 2 O 5 , more than 0 but less than or equal to 5% of WO 3 , more than 0 but less than or equal to 5% of a clarificant.
4. The glass ceramic according to claim 1 , wherein SiO 2 accounts for 65 to 78%; and/or Al 2 O 3 accounts for 5 to 18%; and/or more than 0 but less than or equal to 12% of Li 2 O; and/or Na 2 O accounts for 0.5 to 10%; and/or ZrO 2 accounts for 0.4 to 3%; and/or P 2 O 5 accounts for 0.4 to 3%; and/or B 2 O 3 accounts for 0 to 4%; and/or K 2 O accounts for 0.5 to 4%; and/or MgO accounts for more than 0 but less than or equal to 2%; and/or ZnO accounts for more than 0 but less than or equal to 2%; and/or CaO accounts for 0 to 4%; and/or BaO accounts for 0 to 4%; and/or FeO accounts for 0 to 1%; and/or SnO 2 accounts for 0.01 to 1%; and/or SrO accounts for 0 to 3%; and/or La 2 O 3 accounts for 0 to 9%; and/or Y 2 O 3 accounts for 0 to 9%; and/or Nb 2 O 5 accounts for 0 to 8%; and/or Ta 2 O 5 accounts for 0 to 8%; and/or WO 3 accounts for 0 to 2%; and/or the clarificant contains As 2 O 3 , Sb 2 O 3 , and CeO 2 and at least one selected from F, Cl, NOx, and SOx with a content of 0 to 5%.
5. The glass ceramic according to claim 1 , wherein SiO 2 /Li 2 O ratio is 4 to 10; and/or ZrO 2 /Li 2 O ratio is greater than 0 but less than or equal to 0.3; and/or Al 2 O 3 /(Na 2 O+Li 2 O) ratio is 0.5 to 2; and/or Li 2 O/Na 2 O ratio is 0.8 to 8.
6. The glass ceramic according to claim 3 , wherein SiO 2 accounts for 68 to 75%; and/or Al 2 O 3 accounts for 6 to 15%; and/or Li 2 O accounts for 6 to 10%; and/or Na 2 O accounts for 2 to 8%; and/or ZrO 2 accounts for 0.8 to 2%; and/or P 2 O 5 accounts for 0.8 to 2%; and/or TiO 2 accounts for 1 to 4%; and/or B 2 O 3 accounts for greater than 0% but less than 2%; and/or K 2 O accounts for 0.8 to 3%; and/or CaO accounts for 0 to 3%; and/or BaO accounts for 0 to 3%; and/or SnO 2 accounts for 0.05 to 0.4%; and/or SrO accounts for 0 to 1%; and/or La 2 O 3 accounts for greater than 0 but less than or equal to 8%; and/or Y 2 O 3 accounts for greater than 0 but less than or equal to 8%; and/or Nb 2 O 5 accounts for 0 to 5%; and/or Ta 2 O 5 accounts for 0 to 5%; and/or WO 3 accounts for 0 to 1%; and/or the clarificant accounts for 0 to 2%.
7. The glass ceramic according to claim 1 , wherein SiO 2 /Li 2 O ratio is 4.5 to 9.5; and/or ZrO 2 /Li 2 O ratio is greater than 0 but less than 0.35; and/or Al 2 O 3 /(Na 2 O+Li 2 O) ratio is 0.7 to 1.8; and/or Li 2 O/Na 2 O ratio is 1.5 to 7.5.
8. The glass ceramic according to claim 1 , wherein Na 2 O accounts for 4 to 8%, and/or Al 2 O 3 accounts for 7 to 15%; and/or ZrO 2 accounts for 1 to 2%; and/or P 2 O 5 accounts for 1 to 2%; and/or K 2 O accounts for 1 to 3%; and/or CaO accounts for 0 to 1%; and/or BaO accounts for 0 to 1%; and/or SnO 2 accounts for 0.05 to 0.2%; and/or the clarificant accounts for 0 to 1%; and/or SiO 2 /Li 2 O ratio is 5 to 9; and/or ZrO 2 /Li 2 O ratio is greater than 0 but less than or equal to 0.30; and/or Al 2 O 3 /(Na 2 O+Li 2 O) ratio is 1 to 1.5; and/or Li 2 O/Na 2 O ratio is 2 to 7.
9. The glass ceramic according to claim 1 , wherein TiO 2 accounts for 0.5 to 5%, and/or ZrO 2 +P 2 O 5 +TiO 2 account for 0.5 to 10%.
10. The glass ceramic according to claim 1 , wherein TiO 2 accounts for 1.5 to 4%, and/or ZrO 2 +P 2 O 5 +TiO 2 account for 2 to 6%.
11. The glass ceramic according to claim 1 , further containing NiO and/or Ni 2 O 3 with total amount thereof not greater than 6%, and a lower limit of the total amount thereof greater than 0.1%; or containing Pr 2 O 5 with content not greater than 8%, and a lower limit of the content thereof greater than 0.4%; or containing CoO and/or Co 2 O 3 with total amount thereof not greater than 2%, and a lower limit of the total amount thereof greater than 0.05%; or contains Cu 2 O and/or CeO 2 with total amount thereof not greater than 4%, and a lower limit of the total amount thereof greater than 0.5%; or containing Fe 2 O 3 with content not greater than 8%, or containing Fe 2 O 3 and CoO with CoO not greater than 0.3%; or containing Fe 2 O 3 and Co 2 O 3 with Co 2 O 3 not greater than 0.3%; or containing Fe 2 O 3 , CoO and NiO; or containing Fe 2 O 3 , Co 2 O 3 and NiO; or containing Fe 2 O 3 , CoO and Co 2 O 3 with a lower limit of the total amount of CoO and Co 2 O 3 greater than 0.2%; or containing Fe 2 O 3 , CoO, NiO and Co 2 O 3 ; or containing MnO 2 with content not greater than 4%, and lower limit of the content greater than 0.1%; or containing Er 2 O 3 with content not greater than 8%, and a lower limit of the content thereof greater than 0.4%; or containing Nd 2 O 3 with content not greater than 8%, and a lower limit of the content thereof greater than 0.4%; or containing Er 2 O 3 , Nd 2 O 3 and MnO 2 with Er 2 O 3 content within 6%, Nd 2 O 3 content within 4%, and MnO 2 content within 2%, and a lower limit of the total amount thereof greater than 0.9%; or containing Cr 2 O 3 with content not greater than 4%, and a lower limit of the content thereof greater than 0.2%; or containing V 2 O 5 with content not greater than 4%, and a lower limit of the content thereof greater than 0.2%.
12. The glass ceramic according to claim 1 , wherein a Li 2 Si 2 O 5 crystalline phase accounts for 20 to 40% of the glass ceramic by wt %.
13. The glass ceramic according to claim 12 , wherein the Li 2 Si 2 O 5 crystalline phase and the quartz and the quartz solid solution crystalline phase are main crystalline phases, the total content thereof is lower than 50% of the glass ceramic by wt %.
14. The glass ceramic according to claim 1 , wherein a thermal conductivity of the glass is above 2 W/m·k at room temperature (25° C.).
15. A portable electronic device, containing the glass ceramic according to claim 1 .
16. The glass ceramic according to claim 11 , containing NiO and/or Ni 2 O 3 with total amount thereof not greater than 4%; or containing Pr 2 O 5 with content not greater than 6%; or containing CoO and/or Co 2 O 3 with total amount thereof not greater than 1.8%; or contains Cu 2 O and/or CeO 2 with total amount thereof not greater than 3%; or containing Fe 2 O 3 with content not greater than 5%; or containing MnO 2 with content not greater than 3%; or containing Er 2 O 3 with content not greater than 6%; or containing Nd 2 O 3 with content not greater than 6%; or containing Cr 2 O 3 with content not greater than 3%; or containing V 2 O 5 with content not greater than 3%.
17. The glass ceramic according to claim 16 , containing NiO and/or Ni 2 O 3 with total amount thereof not greater than 3%; or containing Pr 2 O 5 with content not greater than 5%; or containing Fe 2 O 3 with content not greater than 3%; or containing Cr 2 O 3 with content not greater than 2%; or containing V 2 O 5 with content not greater than 2%.
18. The glass ceramic according to claim 12 , wherein the Li 2 Si 2 O 5 crystalline phase accounts for 20 to 35% of the glass ceramic by wt %.
19. The glass ceramic according to claim 18 , wherein the Li 2 Si 2 O 5 crystalline phase accounts for 20 to 30% of the glass ceramic by wt %.
20. The glass ceramic according to claim 19 , wherein the Li 2 Si 2 O 5 crystalline phase accounts for 20 to 25% of the glass ceramic by wt %.
21. The glass ceramic according to claim 13 , wherein the quartz and the quartz solid solution crystalline phase account for 20 to 30% of the glass ceramic by wt %.
22. The glass ceramic according to claim 21 , wherein the quartz and the quartz solid solution crystalline phase accounts for 25 to 30% of the glass ceramic by wt %.
23. The glass ceramic according to claim 13 , wherein the Li 2 Si 2 O 5 crystalline phase and the quartz and the quartz solid solution crystalline phase are main crystalline phases, the total content thereof is lower than 46% of the glass ceramic by wt %.