A lead-free low-melting glass composition containing vanadium oxide, tellurium oxide, silver oxide and lithium oxide, said composition satisfying the following two relational expressions (1) and (2) in terms of oxides.

[Ag.sub.2O]≥[TeO.sub.2]≥[V.sub.2O.sub.5]≥[Li.sub.2O]  (1)

2[V.sub.2O.sub.5]≥[Ag.sub.2O]+[Li.sub.2O]≥40  (2)

(In the formula, [X] represents a content of component X, and the unit thereof is “mol %”; the same applies hereinafter.) Thus, it is possible to provide a lead-free low-melting glass composition which enables sealing and adhesion at around the melting point (232° C.) of tin and which has high adhesiveness and stickiness.

A lead-free low-melting glass composition containing vanadium oxide, tellurium oxide, silver oxide and lithium oxide, said composition satisfying the following two relational expressions (1) and (2) in terms of oxides.

[Ag.sub.2O]≥[TeO.sub.2]≥[V.sub.2O.sub.5]≥[Li.sub.2O]  (1)

2[V.sub.2O.sub.5]≥[Ag.sub.2O]+[Li.sub.2O]≥40  (2)

(In the formula, [X] represents a content of component X, and the unit thereof is “mol %”; the same applies hereinafter.) Thus, it is possible to provide a lead-free low-melting glass composition which enables sealing and adhesion at around the melting point (232° C.) of tin and which has high adhesiveness and stickiness.

An enamel composition, a method for preparing an enamel composition, and a cooking appliance are provided. The enamel composition may include 15 to 50 wt % of phosphorus pentoxide (P.sub.2O.sub.5); 1 to 20 wt % of silicon dioxide (SiO.sub.2); 1 to 20 wt % of boron oxide (B.sub.2O.sub.3); 5 to 20 wt % of one or more of lithium superoxide (Li.sub.2O), sodium oxide (Na.sub.2O), or potassium oxide (K.sub.2O); 1 to 5 wt % of one or more of sodium fluoride (NaF), calcium fluoride (CaF.sub.2), or aluminum fluoride (AlF.sub.3); 1 to 35 wt % of one or more of magnesium oxide (MgO), barium oxide (BaO), or calcium oxide (CaO); and 5 to 30 wt % of one or more of titanium dioxide (TiO.sub.2), vanadium pentoxide (V.sub.2O.sub.5), molybdenum trioxide (MoO.sub.3), or iron oxide (Fe.sub.2O.sub.3). With such an enamel composition, cleaning may be performed at a low temperature for thermal decomposition, and contaminants, such as fat, may be more completely removed.

An enamel composition, a method for preparing an enamel composition, and a cooking appliance are provided. The enamel composition may include 15 to 50 wt % of phosphorus pentoxide (P.sub.2O.sub.5); 1 to 20 wt % of silicon dioxide (SiO.sub.2); 1 to 20 wt % of boron oxide (B.sub.2O.sub.3); 5 to 20 wt % of one or more of lithium superoxide (Li.sub.2O), sodium oxide (Na.sub.2O), or potassium oxide (K.sub.2O); 1 to 5 wt % of one or more of sodium fluoride (NaF), calcium fluoride (CaF.sub.2), or aluminum fluoride (AlF.sub.3); 1 to 35 wt % of one or more of magnesium oxide (MgO), barium oxide (BaO), or calcium oxide (CaO); and 5 to 30 wt % of one or more of titanium dioxide (TiO.sub.2), vanadium pentoxide (V.sub.2O.sub.5), molybdenum trioxide (MoO.sub.3), or iron oxide (Fe.sub.2O.sub.3). With such an enamel composition, cleaning may be performed at a low temperature for thermal decomposition, and contaminants, such as fat, may be more completely removed.

A glass powder contains, as a glass composition, TeO.sub.2 of 15 mol % to 65 mol %, MoO.sub.3 of 10 mol % to 60 mol %, and P.sub.2O.sub.5 of 1 mol % to 35 mol %, and is substantially free of PbO.

An enamel composition, a method for preparing an enamel composition, and a cooking appliance are provided. The enamel composition may include 20 to 50% by weight of silicon dioxide (SiO.sub.2), 7 to 12% by weight of boron oxide (B.sub.2O.sub.3), one or more of lithium superoxide (Li.sub.2O), sodium oxide (Na.sub.2O), or potassium oxide (K.sub.2O), and 10 to 20% by weight of sodium fluoride (NaF), 1 to 10% by weight of zinc oxide (ZnO), and one or more of molybdenum oxide (MoO.sub.3), bismuth oxide (Bi.sub.2O.sub.3), or cerium dioxide (CeO.sub.2), and 10 to 40% by weight of titanium dioxide (TiO.sub.2). With such an enamel composition, cleaning is possible in a heating condition of a relatively low temperature and without a soaking process using water.

An enamel composition, a method for preparing an enamel composition, and a cooking appliance are provided. The enamel composition may include 20 to 50% by weight of silicon dioxide (SiO.sub.2), 7 to 12% by weight of boron oxide (B.sub.2O.sub.3), one or more of lithium superoxide (Li.sub.2O), sodium oxide (Na.sub.2O), or potassium oxide (K.sub.2O), and 10 to 20% by weight of sodium fluoride (NaF), 1 to 10% by weight of zinc oxide (ZnO), and one or more of molybdenum oxide (MoO.sub.3), bismuth oxide (Bi.sub.2O.sub.3), or cerium dioxide (CeO.sub.2), and 10 to 40% by weight of titanium dioxide (TiO.sub.2). With such an enamel composition, cleaning is possible in a heating condition of a relatively low temperature and without a soaking process using water.

The laminate of the present disclosure is a laminate including multiple glass ceramic layers each containing quartz and a glass that contains SiO.sub.2, B.sub.2O.sub.3, Al.sub.2O.sub.3, and M.sub.2O, where M is an alkali metal. An Al.sub.2O.sub.3 content of a surface layer portion of the laminate is higher than an Al.sub.2O.sub.3 content of an inner layer portion of the laminate, and a M.sub.2O content of the surface layer portion is lower than a M.sub.2O content of the inner layer portion.

Provided is an optical cap component that can give good sensitivity to an infrared light absorption-based optical gas sensor. An optical cap component includes: a window member formed of a lens-shaped infrared transmitting glass; and a cap member including a cylindrical sidewall portion having openings on both a distal end side and a base end side, wherein the window member is fixed to cover the opening on the distal end side of the cap member.

Provided is a glass composition comprising a glass frit containing P.sub.2O.sub.5, BaO, ZnO, group I-based oxide and group II-based oxide, wherein the P.sub.2O.sub.5 is contained in an amount of 20 wt % to 55 wt % based on a total weight of the glass frit, wherein each of the BaO and ZnO is contained in an amount of 2 to 30% by weight based on the total weight of the glass frit, wherein the group I-based oxide is contained in an amount of 5 to 20% by weight based on the total weight of the glass frit, wherein the group II-based oxide is contained in an amount of 1 to 15% by weight based on the total weight of the glass frit.