# US 2014/0154440 A1 · Glass for chemical strengthening and glass housing

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- Number: US 2014/0154440 A1
- Document ID: US20140154440A1
- Status: Published application
- Kind: A1
- Application number: 14/176,451
- Filed: 2014-02-10
- Published: 2014-06-05
- Earliest claimed: 2011-08-10
- Assignees: Asahi Glass Company, Limited
- Applicants: Asahi Glass Company, Limited
- Inventors: Yuuichi Iida; Makoto Shiratori
- Web page: https://patentgrep.com/patent/US20140154440A1

## CPC

- C03C 14/008: {the non-glass component being in molecular form}
- C03C 3/085: containing an oxide of a divalent metal
- C03C 3/087: containing calcium oxide, e.g. common sheet or container glass
- C03C 3/091: containing aluminium
- C03C 3/093: containing zinc or zirconium
- C03C 3/095: containing rare earths
- C03C 4/02: for coloured glass
- C03C 21/002: {to perform ion-exchange between alkali ions (C03C21/005 takes precedence)}
- Y10T 428/131: Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.]
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

To provide glass for chemical strengthening from which glass having high strength and having excellent solarization resistance is obtained, and a housing such glass. Glass for chemical strengthening comprises, as represented by mole percentage based on oxides, at least from 55 to 80% of SiO2, from 5 to 20% of Na2O, from 0.001 to 3% of Fe2O3 and from 0.001 to 3% of TiO2 and further contains as a coloring component from 0.001 to 10% of MpOq (wherein M is at least one member selected from Co, Cu, V, Cr, Pr, Ce, Bi, Eu, Mn, Er, Ni, Nd, W, Rb, Sn and Ag, and p and q represent the atomic ratio of M and O). A glass housing comprises chemically strengthened glass obtained by subjecting the glass for chemical strengthening to chemical strengthening treatment.

## Claims

### Claim 1

Glass for chemical strengthening, which comprises, as represented by mole percentage based on oxides, at least from 55 to 80% of SiO2, from 5 to 20% of Na2O, from 0.001 to 3% of Fe2O3 and from 0.001 to 3% of TiO2, and contains as a coloring component from 0.001 to 10% of MpOq (wherein M is at least one member selected from Co, Cu, V, Cr, Pr, Ce, Bi, Eu, Mn, Er, Ni, Nd, W, Rb, Sn and Ag, and p and q represent the atomic ratio of M and O).

### Claim 2 (depends on 1)

The glass for chemical strengthening according to claim 1, which comprises, as represented by mole percentage based on oxides, from 55 to 80% of SiO2, from 3 to 16% of Al2O3, from 0 to 12% of B2O3, from 5 to 16% of Na2O, from 0 to 5% of K2O, from 0 to 15% of MgO, from 0 to 5% of ZnO, from 0 to 1% of RO (wherein R is at least one member selected from Sr, Ba and Ca), from 0 to 5% of ZrO2, from 0.001 to 3% of Fe2O3 and from 0.001 to 3% of TiO2, and further contains as a coloring component from 0.001 to 10% of MpOq (wherein M is at least one member selected from Co, Cu, V, Cr, Pr, Ce, Bi, Eu, Mn, Er, Ni, Nd, W, Rb, Sn and Ag, and p and q represent the atomic ratio of M and O).

### Claim 3 (depends on 1)

The glass for chemical strengthening according to claim 1, which comprises, as represented by mole percentage based on oxides, from 55 to 80% of SiO2, from 3 to 16% of Al2O3, from 0 to 12% of B2O3, from 5 to 16% of Na2O, from 0 to 15% of K2O, from 0 to 15% of MgO, from 0 to 5% of ZnO, from 0 to 1% of RO (wherein R is at least one member selected from Sr, Ba and Ca), from 0 to 5% of ZrO2, from 0.001 to 3% of Fe2O3 and from 0.001 to 3% of TiO2, and further contains as a coloring component from 0.001 to 10% of MpOq (wherein M is at least one member selected from Co, Cu, V, Cr, Pr, Ce, Bi, Eu, Mn, Er, Ni, Nd, W, Rb, Sn and Ag, and p and q represent the atomic ratio of M and O).

### Claim 4 (depends on 1)

The glass for chemical strengthening according to claim 1, which comprises, as represented by mole percentage based on oxides, from 55 to 80% of SiO2, from 0 to 5% of Al2O3, from 0 to 12% of B2O3, from 5 to 20% of Na2O, from 0 to 8% of K2O, from 1 to 15% of CaO, from 0 to 5% of ZnO, from 0 to 10% of RO (wherein R is at least one member selected from Sr, Ba and Mg), from 0 to 5% of ZrO2, from 0.001 to 3% of Fe2O3 and from 0.001 to 3% of TiO2, and further contains as a coloring component from 0.001 to 10% of MpOq (wherein M is at least one member selected from Co, Cu, V, Cr, Pr, Ce, Bi, Eu, Mn, Er, Ni, Nd, W, Rb, Sn and Ag, and p and q represent the atomic ratio of M and O).

### Claim 5 (depends on 1)

The glass for chemical strengthening according to claim 1, which contains, as the coloring component, from 0 to 3% of Co3O4 and from 0 to 8% of CuO in a total content of from 0.01 to 8%.

### Claim 6 (depends on 5)

The glass for chemical strengthening according to claim 5, wherein the transmission color tone measured by using illuminant C in a thickness of 2 mm, as represented by the value (x,y) on the CIE chromaticity coordinate, satisfy the following conditions:
0.00≦x≦0.32
0.00≦y≦0.40

### Claim 7 (depends on 1)

The glass for chemical strengthening according to claim 1, which contains as the coloring component from 0 to 5% of V2O5, from 0 to 5% of Cr2O3, from 0 to 8% of CuO and from 0 to 3% of Pr6O11 in a total content of from 0.01 to 8%.

### Claim 8 (depends on 7)

The glass for chemical strengthening according to claim 7, wherein the transmission color tone measured by using illuminant C in a thickness of 2 mm, as represented by the value (x,y) on the CIE chromaticity coordinate, satisfy the following conditions:
0.00≦x≦0.42
0.31≦y≦0.78

### Claim 9 (depends on 1)

The glass for chemical strengthening according to claim 1, which contains as the coloring component from 0 to 3% of CeO2, from 0 to 5% of V2O5, from 0 to 10% of Bi2O3 and from 0 to 3% of Eu2O3 in a total content of from 0.01 to 10%.

### Claim 10 (depends on 9)

The glass for chemical strengthening according to claim 9, wherein the transmission color tone measured by using illuminant C in a thickness of 2 mm, as represented by the value (x,y) on the CIE chromaticity coordinate, satisfy the following conditions:
0.31≦x≦0.66
0.31≦y≦0.58

### Claim 11 (depends on 1)

The glass for chemical strengthening according to claim 1, which contains as the coloring component from 0 to 10% of MnO2, from 0 to 3% of Er2O3, from 0 to 5% of NiO, from 0 to 3% of Nd2O3 and from 0 to 10% of WO3 in a total content of from 0.01 to 10%.

### Claim 12 (depends on 11)

The glass for chemical strengthening according to claim 11, wherein the transmission color tone measured by using illuminant C in a thickness of 2 mm, as represented by the value (x,y) on the CIE chromaticity coordinate, satisfy the following conditions:
0.26≦x≦0.50
0.04≦y≦0.34

### Claim 13 (depends on 1)

The glass for chemical strengthening according to claim 1, which further contains from 0 to 3% of SnO and from 0 to 5% of Sb2O3 and contains as the coloring component from 0 to 3% of Cu2O and from 0 to 6% of Ag2O, in a total content of SnO and Sb2O3 of from 0.01 to 5% and in a total content of Cu2O and Ag2O of from 0.001 to 6%.

### Claim 14 (depends on 13)

The glass for chemical strengthening according to claim 13, wherein the transmission color tone measured by using illuminant C in a thickness of 2 mm, as represented by the value (x,y) on the CIE chromaticity coordinate, satisfy the following conditions:
0.31≦x≦0.73
0.20≦y≦0.35

### Claim 15 (depends on 1)

The glass for chemical strengthening according to claim 1, wherein the transmittance deterioration degree ΔT as obtained by the following formula is at most 5%:
ΔT(%)=[(T0−T1)/T0]×100
wherein T1 is the average transmittance at wavelengths of from 380 nm to 780 nm in a spectral transmittance curve obtained after a polished surface of glass having a thickness of 2 mm having both surfaces optically mirror-polished, is irradiated with light of a 400 W high pressure mercury lamp with a distance of 15 cm for 50 hours, and T0 is the average transmittance at wavelengths of from 380 nm to 780 nm in a spectral transmittance curve before light irradiation.

### Claim 16 (depends on 1)

The glass for chemical strengthening according to claim 1, which is glass to be used for forming chemically strengthened glass having a compressive stress layer having a thickness of at least 30 μm and a surface compressive stress of at least 550 MPa formed on the glass surface by chemical strengthening treatment.

### Claim 17 (depends on 1)

A glass housing comprising chemically strengthened glass obtained by subjecting the glass for chemical strengthening as defined in claim 1 to chemical strengthening treatment.

### Claim 18 (depends on 17)

The glass housing according to claim 17, wherein the chemically strengthened glass has a thickness of at least 0.5 mm.

### Claim 19 (depends on 17)

The glass housing according to claim 17, wherein the chemically strengthened glass has a compressive stress layer having a depth of at least 30 μm and a surface compressive stress of at least 550 MPa formed on its surface by the chemical strengthening treatment.

### Claim 20 (depends on 17)

The glass house according to claim 17, which is a glass housing to be used to accommodate an electronic device.