WO2021094695A1 - Vitrage antisolaire a faible reflexion interne - Google Patents
Vitrage antisolaire a faible reflexion interne Download PDFInfo
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- WO2021094695A1 WO2021094695A1 PCT/FR2020/052080 FR2020052080W WO2021094695A1 WO 2021094695 A1 WO2021094695 A1 WO 2021094695A1 FR 2020052080 W FR2020052080 W FR 2020052080W WO 2021094695 A1 WO2021094695 A1 WO 2021094695A1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/3411—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials
- C03C17/3429—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials at least one of the coatings being a non-oxide coating
- C03C17/3435—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials at least one of the coatings being a non-oxide coating comprising a nitride, oxynitride, boronitride or carbonitride
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/20—Materials for coating a single layer on glass
- C03C2217/21—Oxides
- C03C2217/213—SiO2
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/20—Materials for coating a single layer on glass
- C03C2217/21—Oxides
- C03C2217/228—Other specific oxides
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/20—Materials for coating a single layer on glass
- C03C2217/28—Other inorganic materials
- C03C2217/281—Nitrides
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/70—Properties of coatings
- C03C2217/73—Anti-reflective coatings with specific characteristics
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/10—Deposition methods
- C03C2218/15—Deposition methods from the vapour phase
- C03C2218/152—Deposition methods from the vapour phase by cvd
Definitions
- TITLE Insulating glazing with low internal reflection
- the invention relates to so-called solar control insulating glazing, provided with stacks of thin layers, at least one of which is functional, that is to say that it acts on the radiation.
- solar and / or thermal mainly by reflection and / or absorption of near infrared (solar) or far (thermal) radiation.
- the present invention relates more particularly to glazing with layer (s), in particular those intended mainly for the thermal insulation of buildings.
- the term “functional” or even “active” layer (s), within the meaning of the present application, is understood to mean the layer (s) of the stack which confers (s) on the stacking most of its thermal properties. Most often, the stacks of thin layers fitted to the glazing give it improved solar control properties essentially through the intrinsic properties of this or these active layer (s).
- a functional layer acts on the flow of solar radiation passing through said glazing, as opposed to the other layers, generally made of dielectric material, and having the function of chemical or mechanical protection of said functional layer.
- Such glazing provided with stacks of thin layers act on the incident solar radiation either primarily by absorption of incident radiation by the functional layer, or primarily by reflection by this same layer. They are grouped under the designation of solar control glazing. They are marketed and used primarily either to primarily protect the home from solar radiation and prevent overheating, or primarily to provide thermal insulation for the home and prevent heat loss.
- the term “sunscreen” therefore means the ability of the glazing to limit the energy flow, in particular solar infrared radiation (1RS) passing through it from the outside to the inside of the dwelling or the passenger compartment. .
- the solar control properties of a glazing are conferred on it by a stack of layers, at least one of which is said to be functional, that is to say say that it has infrared reflection and / or absorption properties while allowing at least part of the visible radiation to pass.
- the solar factor denoted FS or g is used in the field.
- the solar factor g is equal to the ratio of the energy passing through the glazing (that is to say entering the room) and the incident solar energy. More particularly, it corresponds to the sum of the flux transmitted directly through the glazing and of the flux absorbed by the glazing (including the stacks of layers possibly present on one of its surfaces) then possibly re-emitted towards the interior (the local). Glazing with the lowest possible g-factor and at least less than 50% (0.5) or close to 50% is currently being sought.
- Another important factor taken into account is the light transmission TL which describes the percentage of visible light (between 380 and 780 nm) which passes through the glazing. TL values can, however, vary greatly from one sunscreen to another depending on the level of sunshine in the country concerned, but also on the wishes of architects and other project managers. Typically it can be estimated that the required light transmission can vary between 20 and 80%, depending on the demands.
- the most efficient stacks marketed today to achieve such performance incorporate at least one silver-type metallic layer operating essentially in the mode of reflecting most of the incident IR (infrared) radiation.
- These stacks can be used mainly as glazing of the low emissive type (or low-e in English) or as sunscreen glazing.
- these layers are very sensitive to moisture and oxidation. They are therefore exclusively used in double glazing, opposite 2 or 3 thereof, to be protected from humidity. It is thus not possible to deposit such layers on single glazing (also called monolithic).
- the stacks according to the present invention do not include such layers based on silver, or else based on gold or platinum, or else in very negligible quantities, in particular in the form of inevitable impurities.
- the functional layers, or even the stacks, of the glass articles according to the invention are in principle free from nickel or copper.
- Stacks with low emissivity or sunscreen properties are also known, but based on functional layers of transparent conductive oxides.
- TCO transparent conductive oxides
- TCO transparent conductive oxides
- tin and indium such as for example the stacks described in the publication US2009320824.
- layer thicknesses of at least 100 nm. The deposition of such layers by magnetron assisted sputtering techniques is therefore long and expensive.
- stacks with a sunscreen function have also been disclosed in the field, comprising functional layers of the metallic Nb or nitrided niobium NbN type, as described for example in application W001 / 21540 or else in application WO2009 / 112759.
- the solar radiation is this time mainly absorbed in a non-selective manner by the functional layer, that is to say that the IR radiation (i.e. that is, whose wavelength is between about 780 nm and 2500 nm) and visible radiation (whose wavelength is between about and 380 and 780 nm) are absorbed indiscriminately by the active layer.
- the use of niobium-based layers then results in high values of the internal reflection of glazing equipped with such stacks.
- the exterior light reflection Ri_ext that is to say the light reflection measured on the face of the glazing exposed to the outside of the building or the passenger compartment
- Runt interior light reflection i.e. the light reflection measured on the side of the glazing facing inward.
- the so-called solar control stack can be placed on the face of the glazing facing the interior of the building or of the passenger compartment which it equips and in particular on face 2 of a single glazing, the faces being numbered conventionally from the outside to the inside.
- the Runt interior light reflection is measured on the face provided with the stack of layers, while the Ri_ext exterior light reflection is measured on the bare face of the glazing.
- the glazing comprising a single functional layer based on niobium, as described in application WO01 / 21540, exhibit a strong internal reflection but also a very pronounced orange-yellow color, in particular at night or in weak sunlight, this color being considered very unsightly.
- CIE Lab color representation model developed by the Commission Internationale de l'Eclairage (CIE) these colors correspond to an a * greater than 0 and above all a b * much greater than 0.
- it is therefore desired that such glazing also has a substantially neutral or bluish coloration in internal reflection, that is to say on the side of the face of the glazing on which the stack is deposited (inner side).
- a * and b * in the system L, a * , b * (typically at a viewing angle of 10 ° and under the illuminant Des), either close to 0 or negative.
- Acceptable values of a * and b * are in particular less than 5.
- Values close to 0 are characteristic of a neutral coloration while negative values, in particular negative values of b * , reflect a blue coloration.
- the patent application WO2009 / 112759 proposes to have several functional layers based on niobium optionally.
- the object of the present invention is in particular to provide an alternative solution to that described in application WO2009 / 112759, and which also has an AR, in the sense described above, at least greater than 6% for the reasons described above.
- the present invention relates to glass articles exhibiting the majority and most often all of the following criteria:
- Runt light reflection i.e. on the face of the substrate on which the stack of layers is deposited
- the Ri_ext light reflection (that is to say on the face of the substrate on the opposite side of which the stack of layers is deposited) is greater than or equal to 15%
- the parameters L, a * and b * are measured according to the CIE LAB criteria, at an angle of 10 ° and with the illuminant D65.
- stack side is meant the face of the glazing on which the stack is deposited.
- glass side is meant the face of the glazing opposite to that on which the stack is deposited, in principle not covered.
- the terms “exterior face” (or “exterior”) and “interior face” or (“interior”) refer to the position of the glazing when it is fitted to the building or the vehicle to which it is installed. intended.
- the glass and glazing articles according to the invention have solar control properties in accordance with those required in the field, in particular a solar factor g close to and preferably less than 50%, or even less than 45% or even less than 40. % in some configurations.
- the present invention relates to a transparent glass article for sun protection glazing, comprising at least one glass substrate provided on the at least one of its faces of a coating consisting of a stack of layers, said coating comprising the following succession of layers, from the surface of said substrate:
- a second layer comprising silicon nitride, in which the stack comprises only a single layer comprising niobium nitride, and in which the stack comprises, above said succession of layers, an assembly comprising one or several layers, each layer of said assembly comprising a material chosen from among silicon oxide or niobium oxide or a silicon and zirconium nitride, the total thickness of said assembly being greater than 30 nanometers.
- the total thickness of said assembly is greater than 35 nanometers, or even greater than 40 nm.
- the total thickness of said assembly is less than 100 nm, more preferably less than 95 nm.
- a metallic layer of titanium or of a metallic alloy containing titanium is deposited between said first and second layers comprising silicon nitride and the layer comprising niobium nitride, said metallic layer being directly in contact with said layers comprising silicon nitride and comprising niobium nitride.
- the layer comprising niobium nitride has a thickness between 5 and 40 nm.
- the first layer comprising silicon nitride has a thickness between 5 and 120 nm, preferably between 10 and 100 nm.
- the second layer comprising silicon nitride has a thickness between 4 and 100 nm, preferably between 10 and 70 nm.
- the first layer comprising silicon nitride is in contact with the surface of the substrate and preferably is in contact with the layer comprising niobium nitride.
- Said assembly comprises a layer of silicon oxide with a thickness of between 20 and 70 nm, above said succession of layers and preferably is in contact with said succession of layers.
- Said assembly comprises, and preferably consists of, a layer of silicon oxide, preferably of a thickness of between 30 and 70 nm, above said succession of layers and preferably in contact therewith.
- Said assembly comprises, and preferably consists of, a layer comprising silicon oxide and a layer comprising niobium oxide, above said succession.
- Said assembly comprises or is constituted by a layer comprising a silicon and zirconium nitride optionally further comprising aluminum, preferably with a thickness of between 30 and 70 nm, above said succession of layers and preferably in contact with it.
- Said assembly comprises a layer comprising a silicon and zirconium nitride optionally further comprising aluminum and a layer comprising silicon oxide, above said succession of layers and preferably in contact therewith . More preferably, the layer comprising a silicon zirconium nitride is disposed above the layer comprising silicon oxide, with reference to the surface of the glass substrate.
- the Si / Zr atomic ratio in the layer comprising a silicon zirconium nitride is preferably between 1.5 and 6.0 in the layer comprising a silicon zirconium nitride. According to a preferred embodiment, said ratio is between 2.0 and 5.5, or even between 2.5 and 5.0.
- the stack comprises, above said set of layers, at least one layer comprising titanium oxide, zirconium oxide or an oxide of titanium and zirconium, said layer or layers preferably having a thickness less than 10 nm.
- the stack comprises or preferably consists of the succession of the following layers, each layer being in direct contact with the next and from the surface of said substrate:
- the stack comprises or preferably consists of the succession of the following layers, each layer being in direct contact with the next and from the surface of said substrate: SiNx / NbNx / SiNx / SiOx / optionally TiO x , ZrO x or TiZrOx in which SiN x denotes layers comprising silicon nitride, NbN x denotes layers comprising niobium nitride, SiO x denotes a layer comprising silicon oxide, TiO x denotes a layer comprising a titanium oxide, ZrO x denotes a layer comprising a zirconium oxide and TiZrOx denotes a layer comprising an oxide of titanium and zirconium.
- the stack comprises or preferably consists of the succession of the following layers, each layer being in direct contact with the next and from the surface of said substrate: SiNx / NbNx / SiNx / SiOx / NbOx / optionally TiOx, ZrOx or TiZrOx in which SiNx denotes layers comprising silicon nitride, NbNx denotes layers comprising niobium nitride, SiOx denotes a layer comprising silicon oxide, NbOx denotes a layer comprising niobium oxide, TiOx denotes a layer comprising a titanium oxide, ZrOx denotes a layer comprising a zirconium oxide and TiZrOx denotes a layer comprising an oxide of titanium and zirconium.
- the layer comprising silicon oxide has a thickness of 20 to 50 nanometers, and the layer comprising niobium oxide has a thickness of between 2 and 20 nm.
- the stack comprises or consists of the succession of the following layers, each layer being in direct contact with the next and from the surface of said substrate:
- the stack comprises or preferably consists of the succession of the following layers, each layer being in direct contact with the next and from the surface of said substrate: SiNx / NbNx / SiNx / SiZrN / optionally TiO x , ZrO x or TiZrOx in which SiN x denotes layers comprising silicon nitride, NbN x denotes layers comprising niobium nitride, SiZrN denotes a layer comprising a silicon and zirconium nitride, TiO x denotes a layer comprising a titanium oxide, ZrO x denotes a layer comprising a zirconium oxide and TiZrOx denotes a layer comprising an oxide of titanium and zirconium.
- the stack comprises or preferably consists of the succession of the following layers, each layer being in direct contact with the next and from the surface of said substrate: SiNx / NbNx / SiNx / SiOx / SiZrN / optionally TiOx, ZrOx or TiZrOx in which SiNx denotes layers comprising silicon nitride, NbNx denotes layers comprising niobium nitride, SiOx denotes a layer comprising silicon oxide, SiZrN denotes a layer comprising a silicon and zirconium nitride, TiOx denotes a layer comprising a titanium oxide, ZrOx denotes a layer comprising a zirconium oxide and TiZrOx denotes a layer comprising an oxide of titanium and zirconium.
- the layer comprising niobium oxide has a thickness of 10 to 30 nanometers and the layer comprising silicon oxide has a thickness of between 5 and 60 nm.
- the stack does not include functional layers based on Ag, Au, Pt, Cu, Ni or stainless steel.
- the article is thermally hardened and / or curved.
- the article has a light transmission greater than or equal to 15%.
- the article has an internal Runt light reflection (that is to say on the face of the substrate on which the stack of layers is deposited) is less than or equal to 15%.
- the article exhibits a Ri_ext light reflection (that is, on the face of the substrate on the opposite side of which the stack of layers is deposited) greater than or equal to 15%.
- the article has in internal reflection at least one parameter b * , and preferably parameters a * and b * , less than 5, in the colorimetric system L, a * , b * and at an angle of 10 ° and under illuminant D65.
- the invention also relates to a facade cladding panel of the spandrel type incorporating at least one article as described above. Throughout the description, the thicknesses are physical (geometric) thicknesses, unless otherwise indicated.
- the silicon nitride preferably represents at least 50% by weight of said layers, on the basis of an S13N4 formulation, and preferably more than 80% or even more than 90%. weight of said layers, based on the S13N4 formulation. More preferably, said layers consist essentially of silicon nitride, but may also include another metal such as aluminum. Aluminum is used in a well-known manner, in proportions which may range up to 10 atomic% or even more, in silicon targets used for the deposition by cathode sputtering assisted by a magnetic field (magnetron) of layers containing silicon, in particular layers based on silicon nitride.
- the niobium nitride NbN x preferably represents at least 50% by weight of said layers, and preferably more than 80% or even more than 90% of said layers.
- x can vary for example between 0 and 1, preferably between 0 exclusive and 0.9, for example between 0.3 and 0.7.
- the formulation of the layers and in particular the value of x can be obtained conventionally by XPS photoelectron spectrometry, according to well-known techniques. known in the field of materials.
- said layers preferably consist essentially of niobium nitride, or even consist of niobium nitride, apart from inevitable impurities.
- the layer comprising niobium nitride may further comprise a small amount of oxygen, for example such that the O / Nb atomic ratio is less than 0.2, preferably less than 0.1. According to a preferred embodiment, however, the layers comprising niobium nitride do not include oxygen other than in the form of inevitable impurities.
- the silicon oxide preferably represents at least 50% by weight of said layers, on the basis of an S1O2 formulation, and preferably more than 80% or even more 90% of said layers, based on the S1O2 formulation. More preferably, said layers consist essentially of silicon oxide, but can also comprise aluminum. Aluminum is used in a well-known manner, in proportions which may range up to 10 atomic% or even more on the basis of the sum of the elements Si and Al, in the silicon targets used for the deposition by sputtering assisted by a. magnetic field (magnetron) of layers containing silicon, in particular layers based on silicon oxide.
- the niobium oxide preferably represents at least 50% by weight of said layers, based on an Nb2Ü5 formulation, and preferably more than 80% or even more. 90% of said layers, based on the formulation Nb20s. More preferably, said layers consist essentially of niobium oxide.
- the layers according to the invention comprising silicon nitride and zirconium nitride of silicon and zirconium preferably represents at least 50% by weight of said layers, on the basis of an Si x Zr y N formulation, and preferably more than 80% or even more than 90% by weight of said layers, based on said formulation.
- the x / y ratio Si / Zr atomic ratio
- the x / y ratio is between 1, 5 and 6.0, and preferably is between 2.0 and 5.5, or even between 2.5 and 5, 0.
- said layers consist essentially of silicon and zirconium nitride, but may also comprise another metal such as aluminum.
- Aluminum is used well known, in proportions of up to 10 atomic%, on the basis of the sum of the elements Si Zr and Al, or even more and preferably between 1 and 8 atomic%, on the basis of the sum of the elements Si Zr and Al, in silicon targets used for the deposition of layers by cathodic sputtering assisted by a magnetic field (magnetron).
- the coatings according to the invention are conventionally deposited by deposition techniques of the vacuum sputtering type assisted by a magnetic field of a cathode of the material or of a precursor of the material to be deposited, often called the magnetron sputtering technique in the field.
- deposition techniques of the vacuum sputtering type assisted by a magnetic field of a cathode of the material or of a precursor of the material to be deposited often called the magnetron sputtering technique in the field.
- Such a technique is conventionally used today, in particular when the coating to be deposited consists of a more complex stack of successive layers of thicknesses of a few nanometers or a few tens of nanometers.
- the present invention also relates to a front facing panel of the spandrel type incorporating at least one glazing as described above or to a side window, a rear window or a roof for an automobile or other vehicle constituted by or incorporating said glazing.
- the functional layer according to the invention makes it possible to obtain a relatively high value of the light transmission of the substrate, capable of allowing vision from the inside to the outside without hindrance, while maintaining a significant thermal insulating effect. .
- sublayer and “overlayer”, reference is made in the present description to the respective position of said layers with respect to the functional layer comprising niobium nitride in the stack, said stack being supported by the glass substrate. taken as a reference.
- the sublayer is generally the layer in contact with the glass substrate and the overlayer is the outermost layer of the stack, facing away from the substrate.
- All the substrates are made of 6 mm thick clear glass of the Planilux® type marketed by the company Saint-Gobain Glass France.
- All the layers are deposited in a known manner by cathodic sputtering assisted by a magnetic field (often called magnetron).
- the various successive layers are deposited in the successive compartments of the cathode sputtering device, each compartment being provided with a specific metal target in Si, or Nb chosen for the deposition of a specific layer of the stack.
- the silicon nitride layers are deposited in a first compartment of the device from a metallic silicon target (doped with 8% by mass of aluminum), in a reactive atmosphere containing nitrogen (40% Ar and 60% N2).
- the silicon nitride layers denoted S13N4 for convenience, therefore contain a little aluminum.
- These layers are designated below according to the conventional general formulation S13N4, even if the deposited layer does not necessarily meet this assumed stoichiometry.
- the NbN x layers are obtained by sputtering a metallic niobium target in an atmosphere comprising a mixture of nitrogen and argon, according to the conditions described in publication W001 / 21540 or also in publication WO2009 / 112759.
- the silicon oxide layers are obtained by means of an aluminum-doped silicon target identical to that previously described according to a sputtering process in an atmosphere this time comprising oxygen and argon, according to well-known techniques. of those skilled in the art.
- niobium oxide layers are obtained by means of a niobium target identical to that previously described according to a sputtering process in an atmosphere this time comprising oxygen and argon, according to well-known techniques of skilled in the art.
- the silicon and zirconium nitride layers are deposited in a first compartment of the device from a metal target containing silicon, zirconium and aluminum in atomic proportions 68/27/5.
- the target is sprayed using conventional techniques in a reactive atmosphere containing nitrogen and argon (45% Ar and 65% N2).
- the glass substrate has thus been successively covered with a stack of layers comprising a layer of niobium nitride surrounded by layers of silicon nitride.
- the stack therefore comprises at least the succession of the following layers, in accordance with the teaching of application W001 / 21540:
- Niobium nitride is stoichiometric, based on an NbN formulation.
- the stack in addition to this succession of layers, also comprises a set of overlays consisting of at least one layer of a material chosen from silicon oxide S1O2 or silicon oxide. niobium Nb20s.
- Example 1a to 1c A first series of examples (Examples 1a to 1c according to the invention) in which the thicknesses of the different layers are adjusted to obtain a glazing exhibiting a light transmission of the visible through the glazing of the order of 20%.
- a comparative example 1 is also synthesized in accordance with the teaching of publication W001 / 21540, the light transmission of which is also of the order of 20%, comprising only the Sblsb / NbN / Sblsb succession described above.
- Example 2 A first series of examples (Exa to 1c according to the invention) in which the thicknesses of the different layers are adjusted to obtain a glazing exhibiting a light transmission of the visible through the glazing of the order of 20%.
- a comparative example 1 is also synthesized in accordance with the teaching of publication W001 / 21540, the light transmission of which is also of the order of 20%, comprising only the Sblsb / NbN / Sblsb succession described above.
- Example 2
- Example 2 A second series of examples (Examples 2a to 2c according to the invention) in which the thicknesses of the different layers are adjusted to obtain a glazing exhibiting a light transmission of the visible through the glazing of the order of 35%.
- a comparative example 2 is also synthesized according to W001 / 21540, the light transmission of which is also of the order of 35%, comprising only the Sblsb / NbN / Sblsb succession described above.
- Example 3 Example 3:
- a third series of examples (Examples 3a to 3c according to the invention) in which the thicknesses of the different layers are adjusted to obtain a glazing exhibiting a light transmission of the visible through the glazing of the order of 50%.
- a comparative example 3 is also synthesized according to W001 / 21540, the light transmission of which is also of the order of 50%, comprising only the Sblsb / NbN / Sblsb succession described above.
- the glass articles thus synthesized using conventional techniques are then heated and tempered using conventional techniques in the field (heating at 620 ° C. for 10 minutes followed by quenching).
- Table 1 below groups together the information concerning the constitution of the sunscreen stacks according to the examples according to the invention and for comparisons, from the surface of the glass:
- the glazings according to the invention all have a neutral or bluish color in internal reflection, unlike Comparative Examples 1 and 2 for which the color in reflection is very marked and corresponds to a yellow- very pronounced orange. This unsightly color is all the more pronounced as the internal reflection (on the side of the glazing with the stack of layers) is very strong for these same glazings.
- Example 3 As regards Example 3 according to the invention (Examples 3a to 3d), the results reported in Table 2 also indicate a blue or neutral coloration in internal reflection and especially a significant decrease in internal reflection, for example comparison with Comparative Example 3 exhibiting a substantially identical value of the light transmission.
- Example 4 of application W001 / 21540 describes a succession of layers in the stack: Glass / Si 3 N (1 Onm) / Nb (12 nm) / Si 3 N 4 (17 nm)
- example 6 of application W001 / 21540 describes a succession of layers in the stack:
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Abstract
Description
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MX2022005793A MX2022005793A (es) | 2019-11-13 | 2020-11-13 | Encristalado de control solar con baja reflexion interna. |
BR112022001603A BR112022001603A2 (pt) | 2019-11-13 | 2020-11-13 | Vidraça antissolar com baixa reflexão interna |
EP20823889.9A EP4058416A1 (fr) | 2019-11-13 | 2020-11-13 | Vitrage antisolaire a faible reflexion interne |
CONC2022/0001690A CO2022001690A2 (es) | 2019-11-13 | 2022-02-17 | Acristalamiento de control solar de baja reflexión interior |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FRFR1912646 | 2019-11-13 | ||
FR1912646A FR3102984B1 (fr) | 2019-11-13 | 2019-11-13 | Vitrage antisolaire à faible réflexion interne |
Publications (1)
Publication Number | Publication Date |
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WO2021094695A1 true WO2021094695A1 (fr) | 2021-05-20 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/FR2020/052080 WO2021094695A1 (fr) | 2019-11-13 | 2020-11-13 | Vitrage antisolaire a faible reflexion interne |
Country Status (6)
Country | Link |
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EP (1) | EP4058416A1 (fr) |
BR (1) | BR112022001603A2 (fr) |
CO (1) | CO2022001690A2 (fr) |
FR (1) | FR3102984B1 (fr) |
MX (1) | MX2022005793A (fr) |
WO (1) | WO2021094695A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2024013059A1 (fr) * | 2022-07-12 | 2024-01-18 | Saint-Gobain Glass France | Vitrage antisolaire bleu en réflexion extérieure |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001021540A1 (fr) | 1999-09-23 | 2001-03-29 | Saint-Gobain Glass France | Vitrage muni d'un empilement de couches minces agissant sur le rayonnement solaire |
WO2009112759A2 (fr) | 2008-02-27 | 2009-09-17 | Saint-Gobain Glass France | Vitrage antisolaire presentant un coefficient de transmission lumineuse ameliore |
US20090320824A1 (en) | 2008-06-30 | 2009-12-31 | Christian Henn | Arrangement for reflection of heat radiation, process of making same and uses of same |
WO2011030049A2 (fr) * | 2009-09-08 | 2011-03-17 | Saint-Gobain Glass France | Materiau et vitrage comprenant ce materiau |
-
2019
- 2019-11-13 FR FR1912646A patent/FR3102984B1/fr active Active
-
2020
- 2020-11-13 EP EP20823889.9A patent/EP4058416A1/fr active Pending
- 2020-11-13 MX MX2022005793A patent/MX2022005793A/es unknown
- 2020-11-13 WO PCT/FR2020/052080 patent/WO2021094695A1/fr unknown
- 2020-11-13 BR BR112022001603A patent/BR112022001603A2/pt unknown
-
2022
- 2022-02-17 CO CONC2022/0001690A patent/CO2022001690A2/es unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001021540A1 (fr) | 1999-09-23 | 2001-03-29 | Saint-Gobain Glass France | Vitrage muni d'un empilement de couches minces agissant sur le rayonnement solaire |
WO2009112759A2 (fr) | 2008-02-27 | 2009-09-17 | Saint-Gobain Glass France | Vitrage antisolaire presentant un coefficient de transmission lumineuse ameliore |
US20090320824A1 (en) | 2008-06-30 | 2009-12-31 | Christian Henn | Arrangement for reflection of heat radiation, process of making same and uses of same |
WO2011030049A2 (fr) * | 2009-09-08 | 2011-03-17 | Saint-Gobain Glass France | Materiau et vitrage comprenant ce materiau |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024013059A1 (fr) * | 2022-07-12 | 2024-01-18 | Saint-Gobain Glass France | Vitrage antisolaire bleu en réflexion extérieure |
FR3137910A1 (fr) * | 2022-07-12 | 2024-01-19 | Saint-Gobain Glass France | Vitrage antisolaire bleu en réflexion extérieure |
Also Published As
Publication number | Publication date |
---|---|
BR112022001603A2 (pt) | 2022-05-24 |
CO2022001690A2 (es) | 2022-04-08 |
EP4058416A1 (fr) | 2022-09-21 |
FR3102984B1 (fr) | 2021-11-26 |
FR3102984A1 (fr) | 2021-05-14 |
MX2022005793A (es) | 2022-06-14 |
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