The present disclosure provides a glass composition which is for chemical strengthening, from which a glass sheet can be produced by a common float process, and which is suitable for achieving both a surface compressive stress and a compressive stress layer depth. The glass composition according to the present disclosure includes, as components, in mol %: 60 to 80% SiO.sub.2; 1 to 5% Al.sub.2O.sub.3; 5 to 25% MgO; 0 to 5% CaO; 10 to 20% Na.sub.2O; and 0 to 10% K.sub.2O. A chemically strengthened glass article, for example, having a surface compressive stress of 500 MPa or more and a compressive stress layer depth of 10 μm or more can be provided using the glass composition.

Disclosed herein are floor tiles comprising, for instance, a substrate and a surface coating provided on an upper surface of the substrate, wherein the surface coating comprises (i) a base formula comprising a glaze and (ii) solid particles comprising tabular alumina.

Disclosed herein are floor tiles comprising, for instance, a substrate and a surface coating provided on an upper surface of the substrate, wherein the surface coating comprises (i) a base formula comprising a glaze and (ii) solid particles comprising tabular alumina.

The disclosure relates to a method for producing an optical element (202), wherein a blank of transparent material is heated and/or provided and, after heating and/or after being provided is press molded, for example on both sides, between a first mold (UF) and at least one second mold (OF), to form the optical element (202) and is then sprayed with a surface treatment agent.

The disclosure relates to a method for producing an optical element (202), wherein a blank of transparent material is heated and/or provided and, after heating and/or after being provided is press molded, for example on both sides, between a first mold (UF) and at least one second mold (OF), to form the optical element (202) and is then sprayed with a surface treatment agent.

Provided is a novel glass filler having a low permittivity. The glass filler provided includes a glass composition, wherein the glass composition includes, in wt %:95≤SiO.sub.2≤99.5; 0≤B.sub.2O.sub.3≤2; 0.01≤Al.sub.2O.sub.3≤4; 0≤R.sub.2O≤4; 0.01≤RO ≤4; and 0≤TiO.sub.2≤4, where RO is at least one selected from MgO, CaO, SrO, and ZnO, and R.sub.2O is at least one selected from Li.sub.2O, Na.sub.2O, and K.sub.2O. This glass filler can have a permittivity of less than 4 at 1 GHz.

Provided is a novel glass filler having a low permittivity. The glass filler provided includes a glass composition, wherein the glass composition includes, in wt %:95≤SiO.sub.2≤99.5; 0≤B.sub.2O.sub.3≤2; 0.01≤Al.sub.2O.sub.3≤4; 0≤R.sub.2O≤4; 0.01≤RO ≤4; and 0≤TiO.sub.2≤4, where RO is at least one selected from MgO, CaO, SrO, and ZnO, and R.sub.2O is at least one selected from Li.sub.2O, Na.sub.2O, and K.sub.2O. This glass filler can have a permittivity of less than 4 at 1 GHz.

A fiber and a fiber manufacturing method are provided, in which IGCC slag constitute a component of raw materials of the fiber. The fiber can be fabricated stably from the melt of the raw materials by the method in which the raw materials are preheated up to 1300° C. or higher; the raw materials are maintained at the same temperature for certain period of time; subsequently, the temperature of the raw materials are raised further to cause the melted materials are spun into fiber.

A glass substrate with modified surface regions is disclosed. The glass substrate includes an alkali-containing bulk, a first alkali-depleted region, a second alkali-depleted region, and a first ion-exchanged region. The alkali-containing bulk has a first surface and a second surface with the first and second surfaces on opposite sides. The first alkali-depleted region extends into the alkali-containing bulk from the first surface. The second alkali-depleted region extends into the alkali-containing bulk from the second surface. The first ion-exchanged region extends into the alkali-containing bulk from the first surface. The first alkali-depleted region, the second alkali-depleted region, and the first ion-exchanged region each have a substantially homogenous composition. A method of forming the glass substrate is disclosed. The method includes simultaneously forming the first alkali-depleted region and the first ion-exchanged region in the first surface. The method also includes near-simultaneously forming the second alkali-depleted region in the second surface.

A preparation method includes the following steps: Step (1): pressing and then drying body powder to form a green brick; Step (2): applying a ground coat on the surface of the green brick; Step (3): inkjet-printing a pattern on the surface of the green brick having the ground coat, and applying an isolation glaze; Step (4): applying a fully polished glaze on the surface of the green brick having the isolation glaze; and Step (5): drying, firing, and polishing the green brick having the fully polished glaze to obtain a hard wear-resistant polished glazed ceramic tile. The phase composition of the fired fully polished glaze is as follows: 10 to 20 percent by weight of corundum, 20 to 30 percent by weight of hyalophane, 0.5 to 1.0 percent by weight of hematite, and 50 to 68 percent by weight of amorphous phase.