A method for producing a glass-like protective layer on an optionally pre-coated metal or glass substrate. The method comprises: (a) mixing one or more defined silicon compounds with NaOH and KOH, (b) adding water to the mixture obtained in (a) to hydrolyze the silicon compound(s), (c) adding at least one defined compound of formula MY.sub.m,
where M is Pb, Ti, Zr, Al or B, to the hydrolyzed mixture obtained in (b), wherein the molar ratio M/Si is from 0.01/1 to 0.04/1, to obtain a coating sol, (d) applying the coating sol obtained in (c) to the substrate, and (e) thermal densification of the coating sol applied in d) at a temperature of from 300° C. to 500° C. to form the glass-like protective layer.

The present invention includes a method of creating electrical air gap low loss low cost RF mechanically and thermally stabilized interdigitated resonate filter in photo definable glass ceramic substrate. Where a ground plane may be used to adjacent to or below the RF filter in order to prevent parasitic electronic signals, RF signals, differential voltage build up and floating grounds from disrupting and degrading the performance of isolated electronic devices by the fabrication of electrical isolation and ground plane structures on a photo-definable glass substrate.

A glass substrate comprises a glass clad layer fused to a glass core layer. The glass core layer comprises a core glass composition having an average core coefficient of thermal expansion (CTE.sub.core) and the glass clad layer comprises a clad glass composition having an average clad coefficient of thermal expansion (CTE.sub.clad) that is less than the CTE.sub.core. A maximum tensile stress in the glass core layer is less than 15 MPa.

The present invention discloses a glazing characterized through a high hemispherical light transmission together with an enhanced tuneable light diffusion, what we hereby call a highly transmitting glazing with optimized Hortiscatter. The glazing of the invention is particularly well suitable for a greenhouse. The invention is a global approach which allows to propose different glazing which can be utilized depending on the type of crop and the geographical zone, providing optimized Hortiscatter on demand

The present invention discloses a glazing characterized through a high hemispherical light transmission together with an enhanced tuneable light diffusion, what we hereby call a highly transmitting glazing with optimized Hortiscatter. The glazing of the invention is particularly well suitable for a greenhouse. The invention is a global approach which allows to propose different glazing which can be utilized depending on the type of crop and the geographical zone, providing optimized Hortiscatter on demand

A method of forming a glass laminate includes providing a substrate having a core layer and at least one cladding layer; heat treating the substrate at a temperature such that the at least one cladding layer is phase-separated after the heat treating; and etch treating the substrate for at least 10 sec. A phase-separated glass laminate includes a substrate having a core layer and at least one phase-separated cladding layer, such that the glass laminate has a % transmission of at least 96%, and the at least one cladding layer comprises a grain size in a range of 10 nm to 1 μm, or a graded glass index of greater than 5 nm.

A method of forming a glass laminate includes providing a substrate having a core layer and at least one cladding layer; heat treating the substrate at a temperature such that the at least one cladding layer is phase-separated after the heat treating; and etch treating the substrate for at least 10 sec. A phase-separated glass laminate includes a substrate having a core layer and at least one phase-separated cladding layer, such that the glass laminate has a % transmission of at least 96%, and the at least one cladding layer comprises a grain size in a range of 10 nm to 1 μm, or a graded glass index of greater than 5 nm.

A coating composition includes phosphorus pentoxide (P2O5), aluminum oxide (Al2O3), boron trioxide (B2O3), zinc oxide (ZnO), I group-based metal oxide, and II group-based metal oxide. The coating composition includes by weight based on a total weight of the coating composition 35 to 55% P.sub.2O.sub.5, 5 to 35% Al.sub.2O.sub.3, 5 to 40% I group-based metal oxide, 5 to 10% B.sub.2O.sub.3, 1 to 5% ZnO, and 1 to 10% II group-based metal oxide.

A coating composition includes phosphorus pentoxide (P2O5), aluminum oxide (Al2O3), boron trioxide (B2O3), zinc oxide (ZnO), I group-based metal oxide, and II group-based metal oxide. The coating composition includes by weight based on a total weight of the coating composition 35 to 55% P.sub.2O.sub.5, 5 to 35% Al.sub.2O.sub.3, 5 to 40% I group-based metal oxide, 5 to 10% B.sub.2O.sub.3, 1 to 5% ZnO, and 1 to 10% II group-based metal oxide.

A microfabrication method is provided with which it is possible to easily form a fine periodic structure on a surface of any substrate. A glass precursor is applied to a substrate, and the glass precursor is irradiated with short-pulse laser light. By the irradiation with short-pulse laser light, the glass precursor is activated to undergo a thermal reaction, and a fine periodic structure can be easily formed on the surface. Furthermore, by oxidizing the substrate on which the fine periodic structure has been formed, the hue of the surface can be improved while maintaining the fine periodic structure.