US 11,780,766 B2
Enamel composition, method for preparing enamel composition, and cooking appliance
Dong Gun Gwoo, Seoul (KR); Jingon Kim, Seoul (KR); and Young Seok Kim, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Feb. 20, 2020, as Appl. No. 16/796,102.
Claims priority of application No. 10-2019-0021141 (KR), filed on Feb. 22, 2019.
Prior Publication US 2020/0270171 A1, Aug. 27, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. C03C 8/06 (2006.01); C03C 8/08 (2006.01); A47J 36/04 (2006.01); F24C 15/02 (2006.01); A47J 36/02 (2006.01); C03C 3/064 (2006.01); C03C 3/066 (2006.01); C23D 1/00 (2006.01); C23D 5/02 (2006.01); F24C 15/00 (2006.01); C03C 17/04 (2006.01)
CPC C03C 8/08 (2013.01) [A47J 36/025 (2013.01); A47J 36/04 (2013.01); C03C 3/064 (2013.01); C03C 3/066 (2013.01); C23D 1/00 (2013.01); C23D 5/02 (2013.01); F24C 15/005 (2013.01); F24C 15/02 (2013.01); C03C 17/04 (2013.01); C03C 2207/04 (2013.01); C03C 2218/17 (2013.01)] 2 Claims
OG exemplary drawing
 
1. 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 an enamel composition applied onto an inner surface of the cavity or an inner surface of the door, wherein the enamel composition comprises:
phosphorus pentoxide (P2O5) at 15 to 50 wt %;
silicon dioxide (SiO2) at 10 to 20 wt %;
boron oxide (B2O3) at 1 to 15 wt %;
one or more of lithium oxide (Li2O), sodium oxide (Na2O), or potassium oxide (K2O) at 5 to 20 wt %;
one or more of sodium fluoride (NaF), calcium fluoride (CaF2), or aluminum fluoride (AlF3) at 1 to 5 wt %;
one or more of magnesium oxide (MgO), barium oxide (BaO), or calcium oxide (CaO) at 1 to 35 wt %; and
one or more of titanium dioxide (TiO2), cerium dioxide (CeO2), molybdenum trioxide (MoO3), bismuth oxide (Bi2O3), or copper oxide (CuO) at 10 to 25 wt %, wherein when both the MoO3 and the Bi2O3 are included, any one of the MoO3 or the Bi2O3 is included at 2 wt % or less.