Glass having visual internal roughness and method for manufacturing same
View Patent ↗This chemically tempered glass is manufactured by preparing a slurry or paste including a salt solution of a second ion to undergo ion exchange with a first ion inside a glass, applying the slurry or the paste onto the surface of the glass to form a coating film, drying the coating film formed of the slurry or the paste on the surface of the glass, differently forming the distribution of the precipitation phase of a salt of the second ion on the surface of the glass, and heat-treating the glass on which the coating film is formed, to thereby form visual internal roughness which is provided between a first surface and a second surface of the glass, which face each other, to induce the diffuse reflection and/or scattering of light traveling through the first surface or the second surface.
1 . A method for manufacturing a chemically tempered glass, comprising:
preparing a slurry or paste containing a salt of a second ion to be ion-exchanged with a first ion inside a glass;
applying the slurry or paste onto a surface of the glass to form a coating film;
drying the coating film formed of the slurry or paste on the surface of the glass;
differently forming a distribution of a precipitated phase of the salt of the second ion on the surface of the glass; and
heat-treating the glass on which the coating film is formed to form a textured structure which is disposed between a first surface and a second surface facing each other on the glass to induce diffuse reflection and/or scattering of light traveling through the first surface or the second surface,
wherein the textured structure is formed by controlling a diffusion of the second ion to be ion-exchanged with the first ion, and corresponds to a boundary between a diffusion region where the second ion is diffused and a non-diffusion region where the second ion is not diffused.
2 . The method for manufacturing the chemically tempered glass of claim 1 , wherein the distribution of the precipitated phase of the salt of the second ion is adjusted by at least one of a composition of the slurry or paste, a drying temperature of the coating film formed of the slurry or paste, a drying humidity of the coating film formed of the slurry or paste, a drying time of the coating film formed of the slurry or paste, a heat treatment temperature, or a heat treatment time.
3 . The method for manufacturing the chemically tempered glass of claim 1 , wherein the boundary has a non-uniform uneven shape.
4 . The method for manufacturing the chemically tempered glass of claim 1 , wherein a depth from the first surface or the second surface of the diffusion region has a non-uniform value depending on a location.
5 . The method for manufacturing the chemically tempered glass of claim 1 , wherein at least one of the first surface or the second surface has a flat surface.
6 . The method for manufacturing the chemically tempered glass of claim 5 , wherein the textured structure has a texture that is not parallel to the flat surface.
7 . The method for manufacturing the chemically tempered glass of claim 1 , wherein a refractive index of the glass has different values at two different points where the textured structure is different.
8 . The method for manufacturing the chemically tempered glass of claim 7 , wherein the refractive index of the glass varies at a plurality of points where the textured structure is different.
9 . The method for manufacturing the chemically tempered glass of claim 1 , wherein the salt of the second ion is KNO 3 .
10 . The method for manufacturing the chemically tempered glass of claim 1 , wherein the slurry or paste further includes at least one of metal oxide particles or a viscosity modifier.
11 . A chemically tempered glass, comprising:
a first surface and a second surface facing each other; and
a textured structure that is disposed between the first surface and the second surface to induce diffuse reflection and/or scattering of light traveling through the first surface or the second surface,
wherein a second ion is ion-exchanged with a first ion inside a glass, and the textured structure corresponds to a boundary between a diffusion region where the second ion is diffused and a non-diffusion region where the second ion is not diffused.
12 . The chemically tempered glass of claim 11 , wherein the chemically tempered glass has a difference in component between the first ion and/or the second ion included inside the glass according to a location between the first surface and the second surface.
13 . The chemically tempered glass of claim 12 , wherein a concentration difference between a plurality of first ions at different locations on the first surface and/or the second surface is 0.1 at % or more, and a concentration difference between a plurality of second ions at different locations on the first surface and/or the second surface is 0.1 at % or more.
14 . The chemically tempered glass of claim 12 , wherein at least one of the first surface or the second surface has a flat surface, and the textured structure has a texture that is not parallel to the flat surface.
15 . The chemically tempered glass of claim 11 , wherein a refractive index of the glass has different values at two different points where the textured structure is different.
16 . The chemically tempered glass of claim 15 , wherein the refractive index of the glass varies at a plurality of points where the textured structure is different.
17 . The chemically tempered glass of claim 11 , wherein the boundary has an irregular shape and has unevenness.
18 . The chemically tempered glass of claim 11 , wherein a depth of the diffusion region from the first surface or the second surface has a non-uniform value depending on a location.