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

Patent metadata

Field	Value
Publication number	US-10899656-B2
Application number	US-201815885490-A
Country	US
Kind code	B2
Filing date	Jan 31, 2018
Priority date	Feb 2, 2017
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

A glass composition formed of glass frit including P2O5, TiO2 and group I-based oxide, wherein P2O5 is contained in an amount of 20 wt % to 30 wt % based on a total weight of the glass frit, wherein TiO2 is contained in an amount of 10 wt % to 20 wt % based on the total weight of the glass frit, and wherein the group I-based oxide is contained in an amount of 15 wt % to 30 wt % based on the total weight of the glass frit.

First claim

What is claimed is:

1. A glass composition comprising glass frit including P2O5, TiO2, SiO2, B2O3, Al2O3, fluorinated compound, ZrO2, group I-based oxide and group II-based oxide,
wherein P2O5 is contained in an amount of 24.1 wt % to 24.6 wt % based on a total weight of the glass frit,
wherein TiO2 is contained in an amount of 11.3 wt % to 16.1 wt % based on the total weight of the glass frit,
wherein the group I-based oxide is contained in an amount of 17.1 wt % to 18.2 wt % based on the total weight of the glass frit,
wherein SiO2 is contained in an amount of 10 wt % to 17.1 wt % based on the total weight of the glass frit,
wherein B2O3 is contained in an amount of 11.6 wt % to 12.6 wt % based on the total weight of the glass frit,
wherein Al2O3 is contained in an amount of 10 wt % to 18.3 wt % based on the total weight of the glass frit,
wherein the fluorinated compound is contained in an amount of 1.6 wt % to 2.0 wt % based on the total weight of the glass frit,
wherein ZrO2 is contained in an amount of 2.0 wt % to 2.4 wt % based on the total weight of the glass frit,
wherein the group I-based oxide comprises at least one metal oxide selected from a group consisting of Li2O, Na2O and K2O,
wherein the group II-based oxide is contained in an amount of 0.1 wt % to 10 wt % based on the total weight of the glass frit,
wherein the fluorinated compound includes at least one metal fluoride selected from NaF and AlF3,
wherein the glass frit includes a group II-based oxide, wherein the group II-based oxide includes at least one oxide selected from a group consisting of CaO, MgO and BaO,
wherein an amount of the I-based oxide is greater than an amount of the B2O3.

2. A method for producing a glass composition, the method comprising:
preparing glass frit material including P2O5, TiO2, SiO2, B2O3, Al2O3, fluorinated compound, ZrO2, group I-based oxide and group II-based oxide;
melting the glass frit material; and
quenching the melted glass frit material,
wherein P2O5 is contained in an amount of 24.1 wt % to 24.6 wt % based on a total weight of the glass frit,
wherein TiO2 is contained in an amount of 11.3 wt % to 16.1 wt % based on the total weight of the glass frit, and
wherein the group I-based oxide is contained in an amount of 17.1 wt % to 18.2 wt % based on the total weight of the glass frit,
wherein SiO2 is contained in an amount of 10 wt % to 17.1 wt % based on the total weight of the glass frit,
wherein B2O3 is contained in an amount of 11.6 wt % to 12.6 wt % based on the total weight of the glass frit,
wherein Al2O3 is contained in an amount of 10 wt % to 18.3 wt % based on the total weight of the glass frit,
wherein the fluorinated compound is contained in an amount of 1.6 wt % to 2.0 wt % based on the total weight of the glass frit,
wherein ZrO2 is contained in an amount of 2.0 wt % to 2.4 wt % based on the total weight of the glass frit,
wherein the group I-based oxide comprises at least one metal oxide selected from a group consisting of Li2O, Na2O and K2O,
wherein the group II-based oxide is contained in an amount of 0.1 wt % to 10 wt % based on the total weight of the glass frit,
wherein the fluorinated compound includes at least one metal fluoride selected from NaF and AlF3,
wherein the glass frit includes a group II-based oxide, wherein the group II-based oxide includes at least one oxide selected from a group consisting of CaO, MgO and BaO.

3. 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 composition,
wherein the glass composition comprises glass frit including P2O5, TiO2, SiO2, B2O3, Al2O3, fluorinated compound, ZrO2, group I-based oxide and group II-based oxide,
wherein P2O5 is contained in an amount of 24.1 wt % to 24.6 wt % based on a total weight of the glass frit,
wherein TiO2 is contained in an amount of 11.3 wt % to 16.1 wt % based on the total weight of the glass frit, and
wherein the group I-based oxide is contained in an amount of 17.1 wt % to 18.2 wt % based on the total weight of the glass frit,
wherein SiO2 is contained in an amount of 10 wt % to 17.1 wt % based on the total weight of the glass frit,
wherein B2O3 is contained in an amount of 11.6 wt % to 12.6 wt % based on the total weight of the glass frit,
wherein Al2O3 is contained in an amount of 10 wt % to 18.3 wt % based on the total weight of the glass frit,
wherein the fluorinated compound is contained in an amount of 1.6 wt % to 2.0 wt % based on the total weight of the glass frit,
wherein ZrO2 is contained in an amount of 2.0 wt % to 2.4 wt % based on the total weight of the glass frit,
wherein the group I-based oxide comprises at least one metal oxide selected from a group consisting of Li2O, Na2O and K2O,
wherein the group II-based oxide is contained in an amount of 0.1 wt % to 10 wt % based on the total weight of the glass frit,
wherein the fluorinated compound includes at least one metal fluoride selected from NaF and AlF3,
wherein the glass frit includes a group II-based oxide, wherein the group II-based oxide includes at least one oxide selected from a group consisting of CaO, MgO and BaO,
wherein the functional layer has a softening point of 480° C. to 509° C., and a thermal expansion coefficient of 113 (10 −7 /° C.) to 119 (10 −7 /° C.).

4. The device of claim 3 , wherein the glass composition comprises a single type of glass frit.

5. The device of claim 3 , wherein the glass composition is formed using at least two different types of glass frit having different compositions and different composition ratios.

6. The device of claim 3 , wherein the functional layer is a white color.

Assignees

• Lg Electronics Inc

Inventors

• Choi Wongyu
• Kim Youngseok
• Choi Suyeon

Classifications

• C03C2207/02

  containing ingredients for securing a good bond between the vitrified enamel and the metal · CPC title

• C03C2207/00

  Compositions specially applicable for the manufacture of vitreous enamels · CPC title

• C03C4/20

  for chemical resistant glass · CPC title

• C03C3/064

  containing boron · CPC title

• C03B27/028

  the liquid being water-based · CPC title