A black enamel composition includes a glass frit, a black pigment and an organic vehicle, wherein the glass frit includes 50 to 70 wt % of Bi.sub.2O.sub.3, 7.0 to 10.0 wt % of SiO.sub.2, 6.0 to 8.0 wt % of B.sub.2O.sub.3, 10.0 to 15.0 wt % of ZnO, 1.0 to 2.0 wt % of Al.sub.2O.sub.3, 3.2 to 10.9 wt % of the total of Co.sub.3O.sub.4, NiO.sub.2 and Fe.sub.2O.sub.3, based on the total weight of the glass frit, wherein the black pigment is 3 to 10 wt % relative to the total weight of the glass frit.

A black enamel composition includes a glass frit, a black pigment and an organic vehicle, wherein the glass frit includes 50 to 70 wt % of Bi.sub.2O.sub.3, 7.0 to 10.0 wt % of SiO.sub.2, 6.0 to 8.0 wt % of B.sub.2O.sub.3, 10.0 to 15.0 wt % of ZnO, 1.0 to 2.0 wt % of Al.sub.2O.sub.3, 3.2 to 10.9 wt % of the total of Co.sub.3O.sub.4, NiO.sub.2 and Fe.sub.2O.sub.3, based on the total weight of the glass frit, wherein the black pigment is 3 to 10 wt % relative to the total weight of the glass frit.

The present invention relates to a glass composition including: Li.sub.2O; and, as represented by mol % based on oxides, from 60% to 67% of SiO; from 20% to 29% of B.sub.2O.sub.3; from 3% to 9% of CaO; and from 3% to 6% of Al.sub.2O.sub.3, in which a molar ratio (Li.sub.2O:Na.sub.2O:K.sub.2O) among a Li.sub.2O content, a Na.sub.2O content, and a K.sub.2O content is 1:(0-1.9):(0-0.9).

An iron oxide powder includes a porous structure having the diameter of from 0.3 μm to 2 μm, wherein the iron oxide powder has an aluminum content of from 10 mol % to 80 mol %.

A glass coating composition for a fuel cell gasket is described. The coating comprises: a glass component effective to form an alkaline solution in the presence of an equivalent amount of water by weight, a binder component, a liquid carrier which is greater than 50% by volume: water, and a retarder effective to inhibit hardening of the composition. The glass coating composition is particularly useful in fuel cell gaskets and provides improved resistance to solidification in an aqueous dispersion.

A glass coating composition for a fuel cell gasket is described. The coating comprises: a glass component effective to form an alkaline solution in the presence of an equivalent amount of water by weight, a binder component, a liquid carrier which is greater than 50% by volume: water, and a retarder effective to inhibit hardening of the composition. The glass coating composition is particularly useful in fuel cell gaskets and provides improved resistance to solidification in an aqueous dispersion.

The present invention relates to an enamel composition capable of removing sugars as well as poultry oils as contaminants at a low temperature by using a catalyst oxide, to a manufacturing method therefor, and cooking utensils. The present invention provides an enamel composition, a manufacturing method therefor, and cooking utensils, wherein the enamel composition is capable of removing sugars as well as poultry oils as contaminants at a low temperature by comprising: at least one of SiO.sub.2, B.sub.2O.sub.3, Li.sub.2O, Na.sub.2O, and K.sub.2O; and TiO.sub.2.

A cooking device top plate according to the present disclosure comprises: a crystallized glass substrate containing Li.sub.2O-Al.sub.2O.sub.3-SiO.sub.2 as a main component and a transition element; and a substrate color improving layer provided on a lower surface of the crystallized glass substrate, the substrate color improving layer containing a blue pigment and including a brightness enhancing layer having a refractive index smaller than that of the crystallized glass substrate or not less than (a refractive index of the crystallized glass substrate+0.1).

Coated glass or glass ceramic substrates having high temperature resistance, high strength, and a low coefficient of thermal expansion. The coating includes pores, is fluid-tight and suitable for coating a temperature-resistant, high-strength glass or glass ceramic substrate with a low coefficient of thermal expansion, and to a method for producing such a coated substrate.

Coated glass or glass ceramic substrates having high temperature resistance, high strength, and a low coefficient of thermal expansion. The coating includes pores, is fluid-tight and suitable for coating a temperature-resistant, high-strength glass or glass ceramic substrate with a low coefficient of thermal expansion, and to a method for producing such a coated substrate.