# US 8,770,183 B2 · Glass article

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- Number: US 8,770,183 B2
- Document ID: US8770183B2
- Status: Granted
- Kind: B2
- Application number: 12/866,333
- Filed: 2009-01-13
- Published: 2010-12-16
- Granted: 2014-07-08
- Earliest claimed: 2008-02-06
- Assignees: Nippon Electric Glass Co., Ltd.
- Applicants: Akihiro Iritani; Takeshi Nagata
- Inventors: Akihiro Iritani; Takeshi Nagata
- Web page: https://patentgrep.com/patent/US8770183B2

## CPC

- C03C 17/02: with glass (C03C17/34, C03C17/44 take precedence)
- C03C 2218/113: by sol-gel processes
- C03C 2218/32: After-treatment
- Y10T 428/265: 1 mil or less
- 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

Provided is a glass article, including: a crystallized glass plate; and an antifouling film formed on the surface of the crystallized glass plate and containing a multiple oxide of silicon and zirconium or a mixture of a silicon oxide and a zirconium oxide, in which the antifouling film has a β-OH content of 1 to 300/mm.

## Claims

### Claim 1

A glass article, comprising:
a crystallized glass plate; and
an antifouling film formed on a surface of the crystallized glass plate and containing a multiple oxide of silicon and zirconium or a mixture of a silicon oxide and a zirconium oxide,
wherein the antifouling film has a β-OH content of 1 to 300/mm.

### Claim 2 (depends on 1)

The glass article according to claim 1, wherein the antifouling film has a β-OH content of 1 to 150/mm.

### Claim 3 (depends on 1)

The glass article according to claim 1, wherein the antifouling film has a thickness of 10 to 100 nm.

### Claim 4 (depends on 1)

The glass article according to claim 1, wherein the crystallized glass plate is formed of Li2O-Al2O3-SiO2-based crystallized glass.

### Claim 5 (depends on 1)

The glass article according to claim 1, wherein the crystallized glass plate has a thermal expansion coefficient in a temperature range of 30 to 750° C. of −10×10−7 to 50×10−7/° C.

### Claim 6 (depends on 1, 5)

A top plate for a cooker, comprising the glass article according to any one of claim 1 to claim 5.