The present invention relates to a crystallized glass including a crystalline phase consisting of Ba—Si—O, in which the crystallized glass includes Li, and crystallinity of Li-based crystals contained in the crystalline phase is 20% or lower as represented by weight %, a high-frequency substrate including the crystallized glass, and a manufacturing method for a crystallized glass including a crystalline phase consisting of Ba—Si—O, the method including: obtaining an amorphous glass by melt-shaping a material containing BaO and SiO.sub.2; and crystallizing the amorphous glass by holding the amorphous glass at a treatment temperature of 600° C. or higher and lower than 1,000° C.

An alkali-free glass including greater than or equal to 65.0 mol % SiO.sub.2, mol % RO/mol % Al.sub.2O.sub.3 less than 0.7 (where RO can include divalent oxides MgO, CaO, SrO, BaO, or combinations thereof), RO less than or equal to 14 mol %, and the absolute value of a slope dE/dT.sub.f of a line extending between a first endpoint and a second endpoint less than or equal to 10.0221 GPa/° C. The first endpoint is a Young's modulus at a fictive temperature of the annealing point temperature and the second endpoint is a Young's modulus at a fictive temperature of the strain point temperature, and the slope is a change in Young's modulus (GPa) per 1° C. change in fictive temperature. RO is a total amount of alkali earth metal oxides. A glass article is also disclosed.

An alkali-free glass including greater than or equal to 65.0 mol % SiO.sub.2, mol % RO/mol % Al.sub.2O.sub.3 less than 0.7 (where RO can include divalent oxides MgO, CaO, SrO, BaO, or combinations thereof), RO less than or equal to 14 mol %, and the absolute value of a slope dE/dT.sub.f of a line extending between a first endpoint and a second endpoint less than or equal to 10.0221 GPa/° C. The first endpoint is a Young's modulus at a fictive temperature of the annealing point temperature and the second endpoint is a Young's modulus at a fictive temperature of the strain point temperature, and the slope is a change in Young's modulus (GPa) per 1° C. change in fictive temperature. RO is a total amount of alkali earth metal oxides. A glass article is also disclosed.

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 laminated glazing includes a first sheet of a colored glass and a second sheet of a clear glass which are joined together by a lamination interlayer, the first sheet having a thickness el ranging from 1.5 to 2.5 mm, the second sheet having a thickness e2 ranging from 0.4 to 1.9 mm, the ratio R=e2/e1.sup.2 being at most 0.40 mm.sup.−1, the glazing having a light transmission of at least 70% and a direct solar transmission of at most 55%, the colored glass having a chemical composition including a weight content of total iron, expressed in the form Fe.sub.2O.sub.3, ranging from 1.1 to 2.0%, with a redox ratio, defined as the ratio between the weight content of ferrous iron, expressed in the form FeO, and the weight content of total iron, expressed in the form Fe.sub.2O.sub.3, ranging from 0.23 to 0.32.

A laminated glazing includes a first sheet of a colored glass and a second sheet of a clear glass which are joined together by a lamination interlayer, the first sheet having a thickness el ranging from 1.5 to 2.5 mm, the second sheet having a thickness e2 ranging from 0.4 to 1.9 mm, the ratio R=e2/e1.sup.2 being at most 0.40 mm.sup.−1, the glazing having a light transmission of at least 70% and a direct solar transmission of at most 55%, the colored glass having a chemical composition including a weight content of total iron, expressed in the form Fe.sub.2O.sub.3, ranging from 1.1 to 2.0%, with a redox ratio, defined as the ratio between the weight content of ferrous iron, expressed in the form FeO, and the weight content of total iron, expressed in the form Fe.sub.2O.sub.3, ranging from 0.23 to 0.32.

The present invention relates to a glass for chemical strengthening including, in mole percentage on an oxide basis: 60 to 72% of SiO.sub.2; 9 to 20% of Al.sub.2O.sub.3; 1 to 15% of Li.sub.2O; 0.1 to 5% of Y.sub.2O.sub.3; 0 to 1.5% of ZrO.sub.2; and 0 to 1% of TiO.sub.2, having a total content of one or more kinds of MgO, CaO, SrO, BaO and ZnO of 1 to 10%, having a total content of Na.sub.2O and K.sub.2O of 1.5 to 10%, having a total content of B.sub.2O.sub.3 and P.sub.2O.sub.5 of 0 to 10%, wherein a ratio ([Al.sub.2O.sub.3]+[Li.sub.2O])/([Na.sub.2O]+[K.sub.2O]+[MgO]+[CaO]+[SrO]+[BaO]+[ZnO]+[ZrO.sub.2]+[Y.sub.2O.sub.3]) is from 0.7 to 3, wherein a ratio [MgO])/([CaO]+[SrO]+[BaO]+[ZnO]) is from 10 to 45, and having a value M expressed by the following expression of 1,100 or more:

M=−5×[SiO.sub.2]+121×[Al.sub.2O.sub.3]+50×[Li.sub.2O]−35×[Na.sub.2O]+32×[K.sub.2O]+85×[MgO]+54×[CaO]−41×[SrO]−4×[P.sub.2O.sub.5]+218×[Y.sub.2O.sub.3]+436×[ZrO.sub.2]−1180, wherein each of [SiO.sub.2], [Al.sub.2O.sub.3], [Li.sub.2O], [Na.sub.2O], [K.sub.2O], [MgO], [CaO], [SrO], [P.sub.2O.sub.5], [Y.sub.2O.sub.3], and [ZrO.sub.2] designates a content of each component in mole percentage on an oxide basis.

The present invention relates to a glass for chemical strengthening including, in mole percentage on an oxide basis: 60 to 72% of SiO.sub.2; 9 to 20% of Al.sub.2O.sub.3; 1 to 15% of Li.sub.2O; 0.1 to 5% of Y.sub.2O.sub.3; 0 to 1.5% of ZrO.sub.2; and 0 to 1% of TiO.sub.2, having a total content of one or more kinds of MgO, CaO, SrO, BaO and ZnO of 1 to 10%, having a total content of Na.sub.2O and K.sub.2O of 1.5 to 10%, having a total content of B.sub.2O.sub.3 and P.sub.2O.sub.5 of 0 to 10%, wherein a ratio ([Al.sub.2O.sub.3]+[Li.sub.2O])/([Na.sub.2O]+[K.sub.2O]+[MgO]+[CaO]+[SrO]+[BaO]+[ZnO]+[ZrO.sub.2]+[Y.sub.2O.sub.3]) is from 0.7 to 3, wherein a ratio [MgO])/([CaO]+[SrO]+[BaO]+[ZnO]) is from 10 to 45, and having a value M expressed by the following expression of 1,100 or more:

M=−5×[SiO.sub.2]+121×[Al.sub.2O.sub.3]+50×[Li.sub.2O]−35×[Na.sub.2O]+32×[K.sub.2O]+85×[MgO]+54×[CaO]−41×[SrO]−4×[P.sub.2O.sub.5]+218×[Y.sub.2O.sub.3]+436×[ZrO.sub.2]−1180, wherein each of [SiO.sub.2], [Al.sub.2O.sub.3], [Li.sub.2O], [Na.sub.2O], [K.sub.2O], [MgO], [CaO], [SrO], [P.sub.2O.sub.5], [Y.sub.2O.sub.3], and [ZrO.sub.2] designates a content of each component in mole percentage on an oxide basis.

A glass-ceramic comprising, in weight percent on an oxide basis, of 50 to 70% SiO.sub.2, 0 to 20% Al.sub.2O.sub.3, 12 to 23% MgO, 0 to 4% Li.sub.2O, 0 to 10% Na.sub.2O, 0 to 10% K.sub.2O, 0 to 5% ZrO.sub.2, and 2 to 12% F, wherein the predominant crystalline phase of said glass-ceramic is a trisilicic mica, a tetrasilicic mica, or a mica solid solution between trisilicic and tetrasilicic, and wherein the total of Na.sub.2O+Li.sub.2O is at least 2 wt. %; wherein the glass-ceramic can be ion-exchanged.

There is disclosed an antibacterial glass composite that may be made of components harmless to the human body and have excellent durability and chemical resistance, thereby maintaining an antibacterial function for a long time, and a manufacturing method thereof.