Enamel composition, method for preparing enamel composition, and cooking appliance

Patent metadata

Field	Value
Publication number	US-11396472-B2
Application number	US-202016796075-A
Country	US
Kind code	B2
Filing date	Feb 20, 2020
Priority date	Feb 22, 2019
Publication date	Jul 26, 2022
Grant date	Jul 26, 2022

Abstract

An enamel composition, a method for preparing an enamel composition, and a cooking appliance are provided. The enamel composition may include silicon dioxide (SiO2) at 25 to 50 wt %; boron oxide (B2O3) at 1 to 15 wt %; one or more of lithium superoxide (Li2O), sodium oxide (Na2O), or potassium oxide (K2O) at 10 to 20 wt %; sodium fluoride (NaF) at 1 to 5 wt %; zinc oxide (ZnO) at 1 to 10 wt %; and one or more of titanium dioxide (TiO2), molybdenum trioxide (MoO3), bismuth oxide (Bi2O3), or cerium dioxide (CeO2) at 20 to 40 wt %, such that a heating time required for cleaning is shortened and cleaning is possible without carrying out a water soaking process.

First claim

What is claimed is:

1. An enamel composition, comprising:
silicon dioxide (SiO 2 ) at 25 to 50 wt %;
boron oxide (B 2 O 3 ) at 1 to 15 wt %;
one or more of lithium superoxide (Li 2 O), sodium oxide (Na 2 O), or potassium oxide (K 2 O) at 10 to 20 wt %;
sodium fluoride (NaF) at 1 to 5 wt %;
zinc oxide (ZnO) at 1 to 10 wt %;
one or more of titanium dioxide (TiO 2 ), molybdenum oxide (MoO 3 ), bismuth oxide (Bi 2 O 3 ), or cerium dioxide (CeO 2 ) at 20 to 40 wt %; and each of
manganese dioxide (MnO 2 ), iron oxide (Fe 2 O 3 ), cobalt oxide (Co 3 O 4 ), and nickel oxide (NiO), wherein a sum of the manganese dioxide (MnO 2 ), iron oxide (Fe 2 O 3 ), cobalt oxide (Co 3 O 4 ), and nickel oxide (NiO) is 2 to 5 wt %.

2. The enamel composition of claim 1 , wherein a sum of a content of the SiO 2 and a content of the TiO 2 is 30 wt % or more.

3. The enamel composition of claim 1 , wherein the TiO 2 is included at 5 to 20 wt %.

4. The enamel composition of claim 1 , wherein the one or more of the MoO 3 , the Bi 2 O 3 , or the CeO 2 are included at 5 to 15 wt %.

5. A cooking appliance, comprising:
a cavity that forms a cooking chamber;
a door that selectively opens and closes the cooking chamber;
at least one heating source that provides heat to the cooking chamber; and
a coating layer formed of the enamel composition of claim 1 applied onto an inner surface of the cavity or an inner surface of the door.

Assignees

• Lg Electronics Inc

Inventors

• Choi Suyeon
• Kim Young Seok

Classifications

• C03C2207/02

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

• C03C8/00 Primary

  Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions · CPC title

• C03C8/06

  containing halogen · CPC title

• C03C8/16

  with vehicle or suspending agents, e.g. slip · CPC title

• C03C3/093

  containing zinc or zirconium · CPC title