Manufacturing method for phase-separated glass, and phase-separated glass

Patent metadata

Field	Value
Publication number	US-9902647-B2
Application number	US-201615395025-A
Country	US
Kind code	B2
Filing date	Dec 30, 2016
Priority date	Oct 12, 2012
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

The present invention relates to a method for producing phase-separated glass, sequentially including a melting step of melting a glass, a phase separation step of separating phases in the glass, and a shaping step of shaping the glass, and to the phase-separated glass obtained by the production method.

First claim

The invention claimed is:

1. A phase-separated glass, having a structure satisfying Equation (1):
( dL−dS )/ dA≧ 1.0  (1),

where, for particles having a diameter of 100 nm or more generated by phase separation, dA represents an average particle diameter of all the particles, dL represents an average particle diameter of largest 10% by number of all the particles, and dS represents an average particle diameter of smallest 10% by number of all the particles.

2. The phase-separated glass according to claim 1 ,
wherein dA is more than 0.2 μm.

3. The phase-separated glass according to claim 1 ,
wherein the glass is an alkali silicate glass and comprises a total of 6% by mass or more of Na 2 O and K 7 O, and 0.5% by mass or more of P 2 O 5 .

4. The phase-separated glass according to claim 1 ,
wherein the glass comprises at least one of CaO and BaO and a total content of CaO and BaO is less than 6% by mass.

5. The phase-separated glass according to claim 1 , comprising, in terms of an oxide-based mole percentage, SiO 2 in a range of 50% to 80%, Al 2 O 3 in a range of 0% to 10%, B 2 O 3 in a range of 0% to 7%, MgO in a range of 2% to 30%, at least one selected from ZrO 2 , P 2 O 5 , TiO 2 , and La 2 O 3 in a range of 0.5% to 10% in total, and Na 2 O in a range of 1% to 17%.

6. The phase-separated glass according to claim 1 , comprising, in terms of an oxide-based mole percentage, SiO 2 in a range of 50% to 80%, Al 2 O 3 in a range of 0% to 10%, B 2 O 3 in a range of 0% to 4%, MgO in a range of 5% to 30%, at least one selected from ZrO 2 , P 2 O 5 , TiO 2 , and La 2 O 3 in a range of 0.5% to 10% in total, and Na 2 O in a range of 1% to 17%.

7. The phase-separated glass according to claim 1 ,
wherein a light transmittance at a thickness of 1 mm and at each wavelength of a wavelength of 800 nm, a wavelength of 600 nm, and a wavelength of 400 nm is 50% or less.

8. The phase-separated glass according to claim 1 ,
wherein a light transmittance at a thickness of 1 mm and at a wavelength of 1,000 nm is 50% or less.

9. The phase-separated glass according to claim 1 ,
wherein a ratio of a maximum value Tmax to a minimum value Tmin of a light transmittance at a thickness of 1 mm and at a wavelength in a range of 800 nm to 400 nm is 50 or less.

10. A chemically-strengthened glass, obtained by a process comprising:
carrying out an ion exchange treatment on the phase-separated glass according to claim 1 .

11. An electronic device chassis, comprising:
the phase-separated glass according to claim 1 .

12. An electronic device chassis, comprising:
the chemically-strengthened glass according to claim 10 .

Assignees

• Asahi Glass Co Ltd

Inventors

• Miyasaka Junko
• Ohara Seiki
• Sakagami Takahiro

Classifications

• C03C4/08

  for glass selectively absorbing radiation of specified wave lengths · CPC title

• C03C10/0018

  containing SiO2, Al2O3 and monovalent metal oxide as main constituents · CPC title

• Y02P40/57

  Improving the yield, e-g- reduction of reject rates · CPC title

• C03C10/0054

  containing PbO, SnO2, B2O3 · CPC title

• C03C21/002

  to perform ion-exchange between alkali ions (C03C21/005 takes precedence) · CPC title