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.

It is demanded that a LTCC substrate composition capable of maintaining low relative permittivity k and high Q value without having a reactivity with a silver which is an electrode material and causing migration of the silver during a co-firing operation at a low temperature. Provided with a low temperature co-fired substrate composition containing 83 to 91 wt. % of CaO-B.sub.2O.sub.3-SiO.sub.2 based glass powder, 7.5 to 14 wt. % of two or more kinds of nanometer-sized SiO.sub.2 powders having different ranges of particle diameter and 1.5 to 3 wt. % of β-wollastonite powder as a crystallization agent wherein the glass powder contains 40.0 to 45.0 wt. % of CaO, 9.0 to 20.0 wt. % of B.sub.2O.sub.3 and 40.0 to 46.0 wt. % of SiO.sub.2.

It is demanded that a LTCC substrate composition capable of maintaining low relative permittivity k and high Q value without having a reactivity with a silver which is an electrode material and causing migration of the silver during a co-firing operation at a low temperature. Provided with a low temperature co-fired substrate composition containing 83 to 91 wt. % of CaO-B.sub.2O.sub.3-SiO.sub.2 based glass powder, 7.5 to 14 wt. % of two or more kinds of nanometer-sized SiO.sub.2 powders having different ranges of particle diameter and 1.5 to 3 wt. % of β-wollastonite powder as a crystallization agent wherein the glass powder contains 40.0 to 45.0 wt. % of CaO, 9.0 to 20.0 wt. % of B.sub.2O.sub.3 and 40.0 to 46.0 wt. % of SiO.sub.2.

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.

The present disclosure relates to an antibacterial glass composition and a manufacturing method thereof. The antibacterial glass composition according to the present disclosure comprises 20 to 40 wt % of SiO.sub.2; 5 to 25 wt % of B.sub.2O.sub.3; 15 to 25 wt % of one or more of Na.sub.2O, K.sub.2O and Li.sub.2O; and 25 to 45 wt % of CaO, preventing a deterioration in durability and having an excellent antibacterial property. Additionally, the present disclosure relates to an antibacterial glass composition and a manufacturing method of antibacterial glass powder using the same that is a novel silicate glass composition, is transparent and colorless and has an excellent antibacterial property and a high antifungal activation level, such that when the antibacterial glass composition is used as a coating agent of a glass shelf, an additive of a plastic injection molded product and the like, the antibacterial glass composition prevents the deformation of the exteriors of the glass shelf, the plastic injection molded product and the like.

A glass tube element is provided that includes hollow cylindrical section that has a shell enclosing a lumen and a path extending on a surface of the shell facing away from the lumen. The path extends across a first area of the shell where the stress values are within a first interval. The path also extends across a second area of the shell where the stress values are within a second interval.

A glass tube element is provided that includes hollow cylindrical section that has a shell enclosing a lumen and a path extending on a surface of the shell facing away from the lumen. The path extends across a first area of the shell where the stress values are within a first interval. The path also extends across a second area of the shell where the stress values are within a second interval.

A method for manufacturing a glass lining product including: a step of forming a ground coat layer having a thickness of 0.1 to 0.5 mm composed of one layer or a plurality of layers by applying a first glaze on a surface of a metal substrate and firing the first glaze; a step of forming an intermediate layer having a thickness of 0.4 to 1.1 mm composed of one layer or a plurality of layers by applying a second glaze on the ground coat layer and firing the second glaze; and a step of forming a cover coat layer having a thickness of 0.1 to 1.3 mm composed of one layer or a plurality of layers by applying a third glaze on the intermediate layer and firing the third glaze.

A glass includes the following components in the specified proportions (in % by weight): 50-80% SiO.sub.2, 2-30% B.sub.2O.sub.3, 0-5% Al.sub.2O.sub.3, 0-10% CaO, 0-10% BaO, 0-5% Li.sub.2O, 0-20% Na.sub.2O, 1-25% K.sub.2O, and 5-30% ΣR.sub.2O. R.sub.2O includes at least one alkali metal oxide. The glass includes at least one first solarization component and at least one second solarization component. A proportion of the first solarization component in the glass is in a range from 0.01 to <1.0 ppm (by weight) and a proportion of the second solarization component in the glass is in a range from 1000 to 10,000 ppm (by weight).