A material includes a glass sheet coated on at least part of one of its faces with a stack of thin layers, the stack being coated on at least part of its surface with an enamel layer including zinc and less than 5% by weight of bismuth oxide, the stack further including, in contact with the enamel layer, a layer, called contact layer, which is based on an oxide, the physical thickness of the contact layer being at least 5 nm.

A heating device equipped with a chamber defining a cavity, includes a door or wall incorporating a triple glazing including three transparent substrates defining, from the interior to the exterior of the cavity, faces numbered 1 to 6 respectively, at least the faces 1 and 2 of the first substrate and 3 and/or 4 of the second substrate being covered with heat-reflecting coatings, wherein the mean spacing e1 between the first substrate and the second substrate and the mean spacing e2 between the second substrate and the third substrate is different, the ratio between the largest spacing and the smallest spacing being greater than 1.1, and e1 and e2 being between 2 and 20 mm.

A glass sheet includes a tempered mineral glass substrate bearing, on one of its faces, a low-emissivity transparent coating and, on this coating, an enamel layer containing one or more ceramic pigments, the enamel layer covering only a portion of the low-emissivity layer and leaving another part thereof free. At least 50% by weight, preferably at least 80% by weight, and in particular at least 95% by weight of the ceramic pigments are chosen from ceramic pigments that reflect near-infrared radiation (NIR) having a reflectance at 1000 nm, determined according to the standard ASTM E 903, at least equal to 40% and a lightness L* of less than 30. It also relates to a process for manufacturing such a sheet and to an oven or refrigerator door containing such a sheet.

A heating device equipped with a chamber defining a cavity, includes a door or wall incorporating a multiple glazing, the glazing including at least one transparent substrate coated on each face with a stack of thin layers, namely: on a first face, turned toward the cavity, a first stack that reflects heat essentially by virtue of one or more functional layers based on indium tin oxide; and on the other face, turned toward the exterior of the device, a second stack that reflects heat essentially by virtue of one or more functional layers based on a metal chosen from gold or silver.

A cooking apparatus capable of satisfying a heat reflection function while securing a transmittance by applying a variable layer to a glass sheet forming a door includes a cooking chamber, and a door configured to open and close the cooking chamber and provided with a plurality of glass sheets, the door including a variable layer provided on at least one of the plurality of glass sheets and a visible light transmittance variable depending on a temperature.

A heating device equipped with a chamber defining a cavity, includes a door or wall incorporating a multiple glazing, the glazing including at least one transparent substrate coated on each face with a stack of thin layers, namely: on a first face, turned toward the cavity, a first stack that reflects heat essentially by virtue of one or more functional layers based on indium tin oxide; and on the other face, turned toward the exterior of the device, a second stack that reflects heat essentially by virtue of one or more functional layers based on a metal chosen from gold or silver.

A cover panel for a fitout article or article of equipment for a kitchen or laboratory is provided. The cover panel includes a glass or glass ceramic substrate and a coating on one side of the substrate. The substrate and the coating together have a light transmittance of 1% to 70%. The coating has a colour locus in the CIELAB colour space within the range of coordinates L* of 20 to 65, a* of 6 to 6 and b* of 6 to 6. The colour locus of the D65 standard illuminant light, after passing through the substrate and the coating, is within a white region W1 determined in the chromaticity diagram CIExyY-2 by the following coordinates:

TABLE-US-00001 White region W1 x Y 0.27 0.21 0.22 0.25 0.32 0.37 0.45 0.45 0.47 0.34 0.36 0.29.

A glass sheet includes a tempered mineral glass substrate bearing, on one of its faces, a low-emissivity transparent coating and, on this coating, an enamel layer containing one or more ceramic pigments, the enamel layer covering only a portion of the low-emissivity layer and leaving another part thereof free. At least 50% by weight, preferably at least 80% by weight, and in particular at least 95% by weight of the ceramic pigments are chosen from ceramic pigments that reflect near-infrared radiation (NIR) having a reflectance at 1000 nm, determined according to the standard ASTM E 903, at least equal to 40% and a lightness L* of less than 30. It also relates to a process for manufacturing such a sheet and to an oven or refrigerator door containing such a sheet.

A thermally insulating glass for ovens includes a glass substrate, a thermally insulating layer and a protective layer. The glass substrate has an inner and outer surfaces, and the inner or/and outer surfaces are coated with the thermally insulating layer made of silver. The protective layer made of silicone oil is coated on the thermally insulating layer for protecting the thermally insulating layer from being oxidized. Silver can greatly enhance thermally insulating performance and reduce heat dissipation and energy consumption. Based on the high temperature resistance, protective properties and transparency of the silicone oil layer, the protective layer prevents the thermally insulating layer from being oxidized, and the work status can be observed. The process of preparing the thermally insulating glass is simple and the cost is low.

A subject matter of the invention is a glass-ceramic sheet provided, on at least a portion of at least one of its faces, with a coating of thin layers comprising at least one thin functional layer composed of a metal based on niobium metal Nb, or of an oxide based on a niobium oxide NbO.sub.x in which x is at most 0.5, the or each thin functional layer being framed by at least two thin layers made of dielectric materials, the physical thickness of the thin functional layer or, if appropriate, the combined physical thickness of all the thin functional layers being within a range extending from 8 to 15 nm.