Enamel composition, preparation method thereof, and cooking appliance including the same

Patent metadata

Field	Value
Publication number	US-9296643-B2
Application number	US-201313889947-A
Country	US
Kind code	B2
Filing date	May 8, 2013
Priority date	May 10, 2012
Publication date	Mar 29, 2016
Grant date	Mar 29, 2016

Abstract

Provided are a enamel composition, a preparation method thereof, and a cooking appliance. The enamel composition includes a glass frit comprising P 2 O 5 , SiO 2 , B 2 O 3 , Al 2 O 3 , R 2 O (where R is an alkali metal), a chemical property enhancement component, and an adhesion enhancement component. The chemical property enhancement component includes at least one of ZrO 2 and TiO 2 , and the adhesion enhancement component includes at least one of CoO, NiO, MnO 2 and Fe 2 O 3 .

First claim

What is claimed is:

1. An enamel composition comprising:
a glass frit comprising P 2 O 5 , SiO 2 , B 2 O 3 , Al 2 O 3 , R 2 O (where R is an alkali metal), a chemical property enhancement component, an adhesion enhancement component, F and a compound containing F,
wherein the chemical property enhancement component comprises one of ZrO 2 and TiO 2 , and
wherein the adhesion enhancement component comprises one of CoO, NiO, MnO 2 , and Fe 2 O 3 ,
wherein R 2 O comprises Na 2 O, K 2 O and Li 2 O,
wherein the glass frit contains:
11.0 wt % to 17 wt % of P 2 O 5 ,
29.6 wt % to 38.8 wt % of SiO 2 ,
13.6 wt % to 19.6 wt % of B 2 O 3 ,
3.8 wt % to 13.2 wt % of Al 2 O 3 ,
1.8 wt % to 6.9 wt % of F and/or the compound containing F,
0.4 wt % to 1.6 wt % of Li 2 O,
5.3 wt % to 14.5 wt % of Na 2 O,
2.3 wt % to 4.5 wt % of K 2 O,
1.5 wt % to 4.5 wt % of the chemical property enhancement component, and
2 wt % to 7 wt % of the adhesion enhancement component.

2. The enamel composition according to claim 1 , wherein the chemical property enhancement component comprises ZrO 2 and TiO 2 .

3. The enamel composition according to claim 2 , wherein the adhesion enhancement component comprises CoO, NiO, MnO, and Fe 2 O 3 .

4. The enamel composition according to claim 1 , wherein the glass frit further comprises BaO, ZnO, CaO, and MgO.

5. The enamel composition according to claim 1 , wherein the glass frit further contains:
0.8 wt % to 4.1 wt % of ZrO 2 ,
0.1 wt % to 1.5 wt % of TiO 2 ,
1.8 wt % to 6.9 wt % of F and/or the compound containing F,
0.6 wt % to 2.6 wt % of CoO,
0.1 wt % to 0.6 wt % of MnO 2 ,
0.3 wt % to 1.4 wt % of NiO, and
0.1 wt % to 4.3 wt % of Fe 2 O 3 .

6. A method of preparing an enamel composition, the method comprising:
preparing a glass frit material comprising P 2 O 5 , SiO 2 , B 2 O 3 , Al 2 O 3 , R 2 O (where R is an alkali metal), a chemical property enhancement component, and an adhesion enhancement component, and one of F and a compound containing F;
melting the glass frit material;
quenching the melted P 2 O 5 , SiO 2 , B 2 O 3 , Al 2 O 3 , R 2 O, a chemical property enhancement component, and an adhesion enhancement component to form the enamel composition,
wherein the chemical property enhancement component comprises ZrO 2 and TiO 2 , and
wherein the adhesion enhancement component comprises CoO, NiO, MnO 2 , and Fe 2 O 3 ,
wherein the glass frit contains:
11.0 wt % to 17 wt % of P 2 O 5 ,
29.6 wt % to 38.8 wt % of SiO 2 ,
13.6 wt % to 19.6 wt % of B 2 O 3 ,
0.4 wt % to 1.6 wt % of Li 2 O,
5.3 wt % to 14.5 wt % of Na 2 O,
2.3 wt % to 4.5 wt % of K 2 O,
3.8 wt % to 13.2 wt % of Al 2 O 3 ,
0.8 wt % to 4.1 wt % of ZrO 2 ,
0.1 wt % to 1.5 wt % of TiO 2 ,
1.8 wt % to 6.9 wt % of F and/or the compound containing F,
0.6 wt % to 2.6 wt % of CoO,
0.1 wt % to 0.6 wt % of MnO 2 ,
0.3 wt % to 1.4 wt % of NiO, and
0.1 wt % to 4.3 wt % of Fe 2 O 3 .

7. A method of coating an enamel composition, the method comprising:
preparing a substrate;
coating the enamel composition on the substrate; and
firing the enamel composition,
wherein the enamel composition comprises a glass frit containing
11.0 wt % to 17 wt % of P 2 O 5 ,
29.6 wt % to 38.8 wt % of SiO 2 ,
13.6 wt % to 19.6 wt % of B 2 O 3 ,
0.4 wt % to 1.6 wt % of Li 2 O,
5.3 wt % to 14.5 wt % of Na 2 O,
2.3 wt % to 4.5 wt % of K 2 O,
3.8 wt % to 13.2 wt % of Al 2 O 3 ,
0.8 wt % to 4.1 wt % of ZrO 2 ,
0.1 wt % to 1.5 wt % of TiO 2 ,
1.8 wt % to 6.9 wt % of F and/or the compound containing F,
0.6 wt % to 2.6 wt % of CoO,
0.1 wt % to 0.6 wt % of MnO 2 ,
0.3 wt % to 1.4 wt % of NiO, and
0.1 wt % to 4.3 wt % of Fe 2 O 3 .

8. The method according to claim 7 , wherein, after the firing of the enamel composition is performed, the glass frit contains:
11.0 wt % to 17 wt % of P 2 O 5 ,
29.6 wt % to 38.8 wt % of SiO 2 ,
13.6 wt % to 19.6 wt % of B 2 O 3 ,
0.4 wt % to 1.6 wt % of Li 2 O,
5.3 wt % to 14.5 wt % of Na 2 O,
2.3 wt % to 4.5 wt % of K 2 O,
3.8 wt % to 13.2 wt % of Al 2 O 3 ,
0.8 wt % to 4.1 wt % of ZrO 2 ,
0.1 wt % to 1.5 wt % of TiO 2 ,
1.8 wt % to 6.9 wt % of F and/or the compound containing F,
0.6 wt % to 2.6 wt % of CoO,
0.1 wt % to 0.6 wt % of MnO 2 ,
0.3 wt % to 1.4 wt % of NiO, and
0.1 wt % to 4.3 wt % of Fe 2 O 3 .

9. A cooking appliance, comprising;
a cavity defining a cooking chamber;
a door selectively opening or closing the cooking chamber;
a heating source to heat foods within the cooking chamber; and
a coating layer comprising the enamel composition according to claim 1 ,
wherein the coating layer is coated on an inner surface of the cavity.

10. A cooking appliance, comprising;
a cavity defining a cooking chamber;
a door selectively opening or closing the cooking chamber;
a heating source to heat foods within the cooking chamber; and
a coating layer comprising the enamel composition according to claim 1 ,
wherein the coating layer is coated on a back surface of the door facing the cooking chamber in a state where an inside of the cooking chamber is covered by the door.

Assignees

• Lg Electronics Inc

Inventors

• Kim Youngseok
• Lee Yongsoo
• Kim Namjin
• Lee Youngjin

Classifications

• C03C2205/04

  for self-cleaning enamels or glazes · CPC title

• C03C3/064 Primary

  containing boron · CPC title

• C03C4/20

  for chemical resistant glass · CPC title

• C03C8/08

  containing phosphorus · CPC title

• C03C8/20 Primary

  containing titanium compounds; containing zirconium compounds · CPC title