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

1 . A method of preparing an enamel composition, comprising:

providing materials for the enamel composition, the materials comprising;

15 to 50 wt % of phosphorus pentoxide (P 2 O 5 );

5 to 20 wt % of one or more of lithium superoxide (Li 2 O), sodium oxide (Na 2 O), or potassium oxide (K 2 O);

1 to 5 wt % of one or more of sodium fluoride (NaF), calcium fluoride (CaF 2 ), or aluminum fluoride (AlF 3 );

1 to 35 wt % of one or more of magnesium oxide (MgO), barium oxide (BaO), or calcium oxide (CaO);

5 to 30 wt % of one or more of manganese dioxide (MnO 2 ), molybdenum-oxide trioxide (MoO 3 ), bismuth oxide (Bi 2 O 3 ), or nickel oxide NiO; and

2 or less wt % of titanium dioxide (TiO 2 ), wherein when the enamel composition includes both MoO 3 and Bi 2 O 3 , 2 or less wt % of any one of MoO 3 or Bi 2 O 3 is included, melting the materials; and

cooling the melted materials in a quenching roller to form the enamel composition, wherein the enamel composition further comprises 20 or less wt % of silicon dioxide (SiO 2 ).

2 . The method of claim 1 , the enamel composition further comprising:

15 or less wt % of boron oxide (B 2 O 3 ).

3 . The method of claim 1 , the enamel composition further comprising:

1 to 20 wt % of aluminum oxide (Al 2 O 3 );

1 to 5 wt % of zirconium dioxide; and

1 to 20 wt % of one or more of tin oxide (SnO) or zinc oxide (ZnO).

4 . The method in claim 1 , wherein melting the materials for the enamel composition includes melting the materials at 1,200 to 1,400° C. for one to two hours.

5 . The method of claim 1 , further comprising:

mixing the materials for 3 hours before melting the materials.

6 . The method of claim 1 , wherein quenching the melted material includes quenching the melted materials using a quenching roller.

7 . The method of claim 1 , further comprising:

applying the enamel composition to at least one of an inner surface of a cavity of a cooking appliance or an inner surface a door of the cooking appliance.

8 . The method of claim 7 , wherein the applying of the enamel composition includes applying the enamel composition by a dry process that includes dispersing the quenched materials for the enamel composition in an organic binder, milling the quenched materials for the enamel composition and the organic binder to prepare a frit, and applying the frit to the at least one of the inner surface of the cavity of the cooking appliance or the inner surface the door of the cooking appliance.

9 . The method of claim 7 , wherein the applying of the enamel composition includes applying the enamel composition by a wet process that includes dispersing the quenched materials for the enamel composition in water and a pigment, milling the materials for the enamel composition, water, and the pigment to prepare a frit, and applying the frit to the at least one of the inner surface of the cavity of the cooking appliance or the inner surface the door of the cooking appliance.

10 . The method of claim 7 , wherein the applying of the enamel composition includes:

spraying a frit that includes the quenched materials for the enamel composition to the at least one of the inner surface of the cavity of the cooking appliance or the inner surface the door of the cooking appliance; and

firing the sprayed frit.