Glass composition, preparation method of glass composition, and cooking appliance

Patent metadata

Field	Value
Publication number	US-10836673-B2
Application number	US-201815885572-A
Country	US
Kind code	B2
Filing date	Jan 31, 2018
Priority date	Feb 2, 2017
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

A glass composition formed of a glass frit including P 2 O 5 , SiO 2 , B 2 O 3 , Al 2 O 3 , ZrO 2 and group I-based oxide, wherein P 2 O 5 is contained in an amount of 20 wt % to 40 wt % based on a total weight of the glass frit, SiO 2 is contained in an amount of to wt % to 30 wt % based on the total weight of the glass frit, B 2 O 3 is contained in an amount of 3 wt % to 20 wt % based on the total weight of the glass frit, Al 2 O 3 is contained in an amount of 7 to 24 wt % based on the total weight of the glass frit, ZrO 2 is contained in an amount of 1 wt % to 7 wt % based on the total weight of the glass frit, and the group I-based oxide is contained in an amount of 7 wt % to 28 wt % based on the total weight of the glass frit.

First claim

What is claimed is:

1. A glass composition comprising:
a glass frit comprising P2O5, SiO2, B2O3, Al2O3, ZrO2 group I-based oxide, a fluorinated compound including at least one of NaF, CaF 2 and AlF 3 , and an adhesion-enhancing component including at least one of Co 3 O 4 , NiO, Fe2O3 and MnO2,
wherein P2O5 is contained in an amount that is greater than 25 wt % and less than or equal to 40 wt % based on a total weight of the glass frit,
SiO2 is contained in an amount that is greater than or equal to 10 wt % and less than or equal to 25 wt % based on the total weight of the glass frit,
B2O3 is contained in an amount of 3 wt % to 20 wt % based on the total weight of the glass frit,
Al2O3 is contained in an amount of 7 to 24 wt % based on the total weight of the glass frit,
ZrO2 is contained in an amount of 1 wt % to 7 wt % based on the total weight of the glass frit, and
the group I-based oxide is contained in an amount of 7 wt % to 28 wt % based on the total weight of the glass frit,
wherein the fluorinated compounds is contained in an amount of 0.1 wt % to 5 wt % based on the total weight of the glass frit,
wherein the adhesion-enhancing component is contained in an amount of 1 wt % to 5 wt % based on the total weight of the glass frit,
wherein the glass frit comprises more P2O5 than SiO2.

2. The glass composition of claim 1 , wherein the group I-based oxide comprises at least one metal oxide selected from a group consisting of Li2O, Na2O and K2O.

3. The glass composition of claim 1 , wherein the glass frit comprises at least one of TiO2 and SnO, and
wherein said at least one of TiO2 and SnO is contained in an amount of 1 wt % to 10 wt % based on the total weight of the glass frit.

4. The glass composition of claim 1 , wherein the glass frit comprises at least one of a group II-based oxide and ZnO, and
wherein said at least one of the group II-based oxide and ZnO is contained in an amount of 0.1 wt % to 10 wt % based on the total weight of the glass frit.

5. The glass composition of claim 4 , wherein the group II-based oxide comprises at least one oxide selected from a group consisting of CaO, MgO and BaO.

6. A cooking device comprising:
a cavity portion having a heating space defined therein;
a door to provide access to the heating space; and
at least one heat source to supply heat inside the heating space,
wherein at least one of the cavity portion and the door comprises a metal base, and a functional layer disposed on the metal base,
wherein the functional layer comprises a glass frit comprising P2O5, SiO2, B2O3, Al2O3, ZrO2 group I-based oxide, a fluorinated compound including at least one of NaF, CaF2 and AlF3, and an adhesion-enhancing component including at least one of Co 3 O 4 , NiO, Fe2O3 and MnO2,
wherein P2O5 is contained in an amount that is greater than 25 wt % and less than or equal to 40 wt % based on a total weight of the glass frit,
SiO2 is contained in an amount that is greater than or equal to 10 wt % and less than or equal to 25 wt % based on the total weight of the glass frit,
B2O3 is contained in an amount of 3 wt % to 20 wt % based on the total weight of the glass frit,
Al2O3 is contained in an amount of 7 to 24 wt % based on the total weight of the glass frit,
ZrO2 is contained in an amount of 1 wt % to 7 wt % based on the total weight of the glass frit, and
the group I-based oxide is contained in an amount of 7 wt % to 28 wt % based on the total weight of the glass frit,
wherein the fluorinated compounds is contained in an amount of 0.1 wt % to 5 wt % based on the total weight of the glass frit,
wherein the adhesion-enhancing component is contained in an amount of 1 wt % to 5 wt % based on the total weight of the glass frit,
wherein the glass frit comprises more P2O5 than SiO2.

7. The device of claim 6 , wherein the group I-based oxide comprises at least one metal oxide selected from a group consisting of Li2O, Na2O and K2O.

8. The device of claim 6 , wherein the glass frit comprises at least one of TiO2 and SnO, at least one of group II-based oxide and ZnO,
wherein at least one of TiO2 and SnO is contained in an amount of 1 wt % to 10 wt % based on the total weight of the glass frit,
at least one of the group II-based oxide and ZnO is contained in an amount of 0.1 wt % to 10 wt % based on the total weight of the glass frit,
and
the adhesion-enhancing component is contained in an amount of 1 wt % to 5 wt % based on the total weight of the glass frit.

9. The device of claim 8 , wherein the group II-based oxide comprises at least one oxide selected from a group consisting of CaO, MgO and BaO,
and
wherein the adhesion-enhancing component comprises at least one metal oxide selected from a group consisting of Co3O4, NiO, Fe2O3 and MnO2.

10. The device of claim 9 , wherein the functional layer is in direct contact with the metal base.

11. The device of claim 9 , wherein at least one of the cavity portion and the door comprises a buffer layer disposed between the metal base and the functional layer.

Assignees

• Lg Electronics Inc

Inventors

• Kim Namjin
• Kim Youngseok
• Kim Yunsung

Classifications

• F24C15/005

  Coatings for ovens · CPC title

• C03C8/20

  containing titanium compounds; containing zirconium compounds · CPC title

• C03C8/14 Primary

  Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions · CPC title

• C03C8/08 Primary

  containing phosphorus · CPC title

• C03C8/06

  containing halogen · CPC title