Phase-separated glass and preparation method thereof, tempered glass and preparation method thereof, housing of electronic device, display of electronic device, and electronic device
This application provides phase-separated glass prepared from basic glass through phase separation. This application further provides tempered glass prepared from basic glass by sequentially performing phase separation and chemical strengthening. This application further provides a method for preparing the phase-separated glass, a method for preparing the tempered glass, a housing that is of an electronic device and that includes the phase-separated glass or the tempered glass, a display of an electronic device, and an electronic device. In this application, phase separation is performed on the basic glass to form two-phase mixed phase-separated glass that includes an alkali-boron-rich separated phase and a silicon-rich separated phase. The phase-separated glass can prevent micro-cracks in the glass from propagating, thereby improving mechanical properties such as fracture toughness of the glass and then improving anti-drop performance of the glass.
1 . Phase-separated glass, wherein the phase-separated glass comprises:
43~50 mol % of SiO 2 ;
1~5 mol % of Al 2 O 3 ;
32~50 mol % of B 2 O 3 ;
8~15 mol % of Na 2 O;
2~3 mol % of P 2 O 5 ;
0~7 mol % of Li 2 O;
0~5 mol % of K 2 O;
0~3 mol % of MgO;
0~3 mol % of CaO;
0~1 mol % of ZrO 2 ;
0~1 mol % of GeO 2 ;
0~1 mol % of MnO 2 ;
0~1 mol % of CuO;
0~1 mol % of Re 2 O 3 ;
45~50 mol % of SiO 2 +Al 2 O 3 ;
35~50 mol % of B 2 O 3 +P 2 O 5 ;
0~10 mol % of Li 2 O+K 2 O+MgO+CaO;
5 mol %~20 mol % of Na 2 O+Li 2 O+K 2 O+MgO+CaO;
0~3 mol % of ZrO 2 +GeO 2 +MnO 2 +CuO+Re 2 O 3 ; and
an alkali-boron-rich separated phase and a silicon-rich separated phase existing following completion of manufacturing of the phase-separated glass, wherein a surface of the phase-separated glass is provided with an ion exchange layer.
2 . The phase-separated glass of claim 1 , wherein the phase-separated glass comprises:
43~50 mol % of SiO 2 ;
1~5 mol % of Al 2 O 3 ;
32~50 mol % B 2 O 3 ;
8~15 mol % of Na 2 O;
2~3 mol % of P 2 O 5 ;
1 mol %~5 mol % of Li 2 O;
0.1 mol %~3 mol % of MgO;
0.1 mol %~3 mol % of CaO;
0~0.6 mol % of ZrO 2 ;
0~0.6 mol % of CuO;
45~50 mol % of SiO 2 +Al 2 O 3 ;
35 mol %~50 mol % of B 2 O 3 +P 2 O 5 ;
3 mol %~8 mol % of Li 2 O+MgO+CaO; and
10 mol %~18 mol % of Na 2 O+Li 2 O+K 2 O+MgO+CaO.
3 . The phase-separated glass of claim 1 , wherein the phase-separated glass comprises 1~2 mol % of Al 2 O 3 .
4 . The phase-separated glass of claim 1 , wherein the phase-separated glass comprises 35~50 mol % B 2 O 3 .
5 . The phase-separated glass of claim 1 , wherein the phase-separated glass comprises 10~13 mol % of Na 2 O.
6 . The phase-separated glass of claim 1 , wherein Re 2 O 3 comprises:
0~1 mol % of La 2 O 3 ;
0~1 mol % of Ho 2 O 3 ;
0~1 mol % of Y 2 O 3 ; and
0~1 mol % of Nd 2 O 3 .
7 . The phase-separated glass of claim 1 , wherein either a) the alkali-boron-rich separated phase is dispersed in a matrix of the silicon-rich separated phase in an independent spherical shape, or b) the alkali-boron-rich separated phase and the silicon-rich separated phase form a network structure.
8 . The phase-separated glass of claim 7 , wherein in a ball drop test, a ball drop height is 65 cm or more.
9 . The phase-separated glass of claim 7 , wherein a fracture toughness of the phase-separated glass is 1.0 Mpa·m½ 1/2 or more.
10 . The phase-separated glass of claim 1 , wherein the phase-separated glass has a transmittance of 85% or more at a wavelength of 380~750 nm.
11 . The phase-separated glass of claim 1 , wherein a surface of the phase-separated glass is provided with a compressive stress layer.
12 . The phase-separated glass of claim 11 , wherein the phase-separated glass has a surface stress of 350~450 MPa.
13 . The phase-separated glass of claim 11 , wherein in a ball drop test, a ball drop height is 100 cm or more.
14 . A method for preparing a phase-separated glass, comprising performing phase separation on basic glass to obtain the phase-separated glass, wherein the phase-separated glass comprises:
43~50 mol % of SiO 2 ;
1~5 mol % of Al 2 O 3 ;
32~50 mol % of B 2 O 3 ;
8~15 mol % of Na 2 O;
2~3 mol % of P 2 O 5 ;
0~7 mol % of Li 2 O;
0~5 mol % of K 2 O;
0~3 mol % of MgO;
0~3 mol % of CaO;
0~1 mol % of ZrO 2 ;
0~1 mol % of GeO 2 ;
0~1 mol % of MnO 2 ;
0~1 mol % of CuO;
0~1 mol % of Re 2 O 3 ;
45~50 mol % of SiO 2 +Al 2 O 3 ;
35~50 mol % of B 2 O 3 +P 2 O 5 ;
0~10 mol % of Li 2 O+K 2 O+MgO+CaO;
5 mol %~20 mol % of Na 2 O+Li 2 O+K 2 O+MgO+CaO;
0~3 mol % of ZrO 2 +GeO 2 +MnO 2 +CuO+Re 2 O 3 ; and
an alkali-boron-rich separated phase and a silicon-rich separated phase,
wherein a surface of the phase-separated glass is provided with a compressive stress layer.
15 . The method of claim 14 , wherein performing phase separation comprises keeping the basic glass at 550~600° C. for 5~15 h.
16 . The method of claim 14 , further comprising performing a chemical strengthening process to obtain the phase-separated glass.
17 . The method of claim 16 , wherein the chemical strengthening process comprises either a) performing ion exchange on the basic glass in a molten potassium salt, or b) performing one ion exchange on the basic glass in a first molten salt, and then performing two ion exchanges in a second molten salt, wherein the first molten salt is a mixed molten salt of potassium nitrate and sodium nitrate, and the second molten salt is potassium nitrate.
18 . An electronic device, comprising a phase-separated glass that comprises:
43~50 mol % of SiO 2 ;
1~5 mol % of Al 2 O 3 ;
32~50 mol % of B 2 O 3 ;
8~15 mol % of Na 2 O;
2~3 mol % of P 2 O 5 ;
0~7 mol % of Li 2 O;
0~5 mol % of K 2 O;
0~3 mol % of MgO;
0~3 mol % of CaO;
0~1 mol % of ZrO 2 ;
0~1 mol % of GeO 2 ;
0~1 mol % of MnO 2 ;
0~1 mol % of CuO;
0~1 mol % of Re 2 O 3 ;
45~50 mol % of SiO 2 +Al 2 O 3 ;
35~50 mol % of B 2 O 3 +P 2 O 5 ;
0~10 mol % of Li 2 O+K 2 O+MgO+CaO;
5 mol %~20 mol % of Na 2 O+Li 2 O+K 2 O+MgO+CaO;
0~3 mol % of ZrO 2 +GeO 2 +MnO 2 +CuO+Re 2 O 3 ; and
an alkali-boron-rich separated phase and a silicon-rich separated phase.
19 . The electronic device of claim 18 , wherein either a) the phase-separated glass is a cover of a housing of the electronic device, or b) the phase-separated glass is a backplane of a display of the electronic device.