An article of fire rated glass and method of producing the same prepared by selecting a sheet of clear float annealed glass of at least 19 millimeters in thickness and providing the edge of the sheet substantially free of imperfections. The glass sheet is then specially tempered at a temperature of at least 575 degrees Celsius for a period of at least 750 seconds, followed by a cooling step.

A coated glass sheet including a glass substrate and a UV reflecting coating on at least one major surface of the glass substrate. The UV reflecting coating consists of first, second, and third layers in this order moving away from the glass substrate, where the first and third layers include a dielectric material selected from the group consisting of a mixed oxide of titanium and zirconium, and a mixed nitride of zirconium and silicon, and the second layer includes silicon oxide SiOx.

An article of fire rated glass and method of producing the same prepared by selecting a sheet of clear float annealed glass of at least 19 millimeters in thickness and providing the edge of the sheet substantially free of imperfections. The glass sheet is then specially tempered at a temperature of at least 575 degrees Celsius for a period of at least 750 seconds, followed by fluid quenching.

The disclosure relates to an improved glass product having a multifunctional coating or a durable top coat over a functional coating. The glass product may include a functional coating on that is most effective on a surface exposed to various mechanical and chemical elements. The disclosed coating provides a durable protective coating over the functional layer to provide protection over the functional layer on an exposed surface. Alternatively, the functional coating may be applied to the protective coating with a porous, nano-structured surface, which protects the functional coating applied thereto.

The disclosure relates to an improved glass product having a multifunctional coating or a durable top coat over a functional coating. The glass product may include a functional coating on that is most effective on a surface exposed to various mechanical and chemical elements. The disclosed coating provides a durable protective coating over the functional layer to provide protection over the functional layer on an exposed surface. Alternatively, the functional coating may be applied to the protective coating with a porous, nano-structured surface, which protects the functional coating applied thereto.

An article of fire rated glass and method of producing the same prepared by selecting a sheet of clear float annealed glass of at least 19 millimeters in thickness and providing the edge of the sheet substantially free of imperfections. The glass sheet is then specially tempered at a temperature of at least 575 degrees Celsius for a period of at least 750 seconds, followed by a cooling step.

Transparent conductive coatings are polished using particle slurries in combination with mechanical shearing force, such as a polishing pad. Substrates having transparent conductive coatings that are too rough and/or have too much haze, such that the substrate would not produce a suitable optical device, are polished using methods described herein. The substrate may be tempered prior to, or after, polishing. The polished substrates have low haze and sufficient smoothness to make high-quality optical devices.

A thermally tempered glass element is provided made of glass with two opposite faces that are under compressive stress of at least 40 MPa. The glass has a working point at which the glass has a viscosity of 10.sup.4 dPa.Math.s of at most 1350° C. The glass has a viscosity versus temperature profile and a coefficient of thermal expansion versus temperature profile of the glass are such that a variable (750° C.−T.sub.13)/(CTE.sub.Liq−CTE.sub.Sol) has a value of at most 5*10.sup.6 K.sup.2. The CTE.sub.Liq is a coefficient of linear thermal expansion of the glass above a glass transition temperature T.sub.g, the CTE.sub.Sol is a coefficient of linear thermal expansion of the glass in a temperature range from 20° C. to 300° C., and the T.sub.13 is a temperature at which the glass has a viscosity of 10.sup.13 dPa.Math.s.

A thermally tempered glass element is provided made of glass with two opposite faces that are under compressive stress of at least 40 MPa. The glass has a working point at which the glass has a viscosity of 10.sup.4 dPa.Math.s of at most 1350° C. The glass has a viscosity versus temperature profile and a coefficient of thermal expansion versus temperature profile of the glass are such that a variable (750° C.−T.sub.13)/(CTE.sub.Liq−CTE.sub.Sol) has a value of at most 5*10.sup.6 K.sup.2. The CTE.sub.Liq is a coefficient of linear thermal expansion of the glass above a glass transition temperature T.sub.g, the CTE.sub.Sol is a coefficient of linear thermal expansion of the glass in a temperature range from 20° C. to 300° C., and the T.sub.13 is a temperature at which the glass has a viscosity of 10.sup.13 dPa.Math.s.

An article includes a substrate with two main faces defining two main surfaces separated by edges, the substrate carrying a functional coating deposited over at least a portion of a main surface and a temporary protective layer deposited over at least a portion of the coating. The temporary protective layer has a thickness of at least 1 micrometer. The temporary protective layer made of polyfuran resin is obtained from a liquid composition comprising furfuryl alcohol.