WO2023079577A9 - Article en verre de contrôle solaire présentant des propriétés optiques variables - Google Patents

Article en verre de contrôle solaire présentant des propriétés optiques variables Download PDF

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Publication number
WO2023079577A9
WO2023079577A9 PCT/IN2022/050970 IN2022050970W WO2023079577A9 WO 2023079577 A9 WO2023079577 A9 WO 2023079577A9 IN 2022050970 W IN2022050970 W IN 2022050970W WO 2023079577 A9 WO2023079577 A9 WO 2023079577A9
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Prior art keywords
glass article
solar control
control glass
layer
nbn
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PCT/IN2022/050970
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English (en)
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WO2023079577A1 (fr
Inventor
Priyesh DHANDHARIA
Uditendu MUKHOPADHYAY
Soumyadeep MISRA
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Saint-Gobain Glass France
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Application filed by Saint-Gobain Glass France filed Critical Saint-Gobain Glass France
Publication of WO2023079577A1 publication Critical patent/WO2023079577A1/fr
Publication of WO2023079577A9 publication Critical patent/WO2023079577A9/fr
Priority to CONC2024/0007157A priority Critical patent/CO2024007157A2/es

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • G02B1/113—Anti-reflection coatings using inorganic layer materials only
    • G02B1/115—Multilayers
    • G02B1/116—Multilayers including electrically conducting layers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters
    • G02B5/285—Interference filters comprising deposited thin solid films
    • G02B5/286—Interference filters comprising deposited thin solid films having four or fewer layers, e.g. for achieving a colour effect

Definitions

  • the present disclosure relates, in general to a material comprising a transparent substrate, on the surface of which a stack of thin layers is deposited which comprises n functional layers and n+1 dielectric layers making it possible to act on the solar and/or infrared radiation likely to strike said surface. More specifically the invention relates to a material having significant influence on the optical properties such that variation in the position of the functional layers brings about a variation in the optical properties of the material.
  • the key performance parameters for any energy efficient fenestration product are the Solar Heat Gain Coefficient (SHGC), the heat transfer coefficient (U-value) and the visible light transmission (Tvis).
  • SHGC Solar Heat Gain Coefficient
  • U-value is a measure of the insulating value of a window; the lower the value, the better the insulation.
  • SHGC is the ratio of the solar heat gain through the window system relative to the incident solar radiation and Tvis is weighted for human eye sensitivity. Reflected color and haze are equally important aesthetic properties.
  • Yet another fundamental function of architectural windows is to supply visual connection between the inside and outside of buildings.
  • the highly absorptive metal film that would otherwise be opaque to the visible light is sandwiched between the two dielectric layers that act as antireflective coatings.
  • Three-layer systems of Di el ectric/Metal/Di electric on glass substrates have been used for spectrally selective coatings for various purposes including the energy efficiency. By varying the material and thickness of the three layers, the optical properties of the layer films can be tailored to suit different applications.
  • solar control coatings with five-layer systems comprising two absorptive metal layers i.e., Di el ectri c/Metal/Di el ectri c/Metal/Di el ectri c .
  • U.S. patent 8,286,395 granted to the Applicant of the present invention teaches a stack comprising two functional absorptive layers, each one flanked by two transparent layers containing a dielectric material for controlling solar radiation.
  • Metals belonging to niobium, tantalum, molybdenite, or zirconium group are described for glazing intended for thermal insulation and/or solar protection.
  • the internal and external aesthetic of a glass article coated with the said stack is significantly managed. Referring to U.S.
  • PCT publications 2017/160324; 2017/160325; 2017/160326 and 2017/160327 all teach coated articles including two or more infrared (IR) reflecting layers (e.g., of or including NbZr, Nb, NiCr, NiCrMo, and/or a nitride thereof) sandwiched between at least dielectric layers and the coatings are so designed to realize varied glass side reflective colorations in combination with a low solar factor (SF) and/or a low solar heat gain coefficient (SHGC).
  • IR infrared
  • SF low solar factor
  • SHGC low solar heat gain coefficient
  • the glazed surfaces have a significant aesthetic function for buildings and transport vehicles in which they are likely to be incorporated.
  • the coated article must achieve, in external reflection, a colored surface appearance. The shades of color should ideally vary little depending on the angle of observation.
  • the inventors of the present disclosure have extensively studied the combination of two functional layers: NiCr/NiCrN and Nb/NbN to determine their positional influence on the optical performance of the glass article coated therewith.
  • the present disclosure further determines the combination of two functional layers NiCr/NiCrN and Nb/NbN to provide significant differential optical performance as that compared to double functional layers bearing either two layers of NiCr/NiCrN or two layers of Nb/NbN.
  • the objective of the present disclosure is therefore to study the stack configuration Glass
  • asymmetry in the reflection level can be achieved. This asymmetry can be calculated as the ratio between internal reflection (RC) and external reflection (RG) i.e., RC/RG and RG/RC. It is therefore sought to enhance aesthetics while keeping a constant light transmission suitable for allowing good insulation and good vision.
  • the Applicant has surprisingly discovered that when FL1 is deposited with NiCr or NiCrNx and FL2 is deposited with Nb or NbN x , the internal reflection of such a coated glass article is much lower compared to a coated glass article comprising FL1 deposited with Nb or NbNx and FL2 deposited with NiCr or NiCrNx. Likewise, a coated glass article comprising FL1 deposited with NiCr or NiCrNx and FL2 is deposited with Nb or NbNx, has a higher external reflection when compared to a coated glass article comprising FL1 deposited with Nb or NbN x and FL2 deposited with NiCr or NiCrNx. Thus the findings of the present disclosure present an excellent opportunity to obtain variable optical characteristics for the materials deposited in FL1 and FL2.
  • Certain example embodiments of this disclosure relate to a solar control glass article having an internal reflection (RC) of less than 15% and a ratio of said internal reflection (RC) to external reflection (RG) not exceeding 1.2. Certain other example embodiments of the disclosure relate to a solar control glass article having an external reflection (RG) of less than 30% and a ratio of said external reflection (RG) to internal reflection (RC) not exceeding 2. Certain example embodiments of this invention also relate to a heat treatable solar control glass article and certain others to a solar control glass article that is not heat treatable.
  • the solar control glass article characterized in that when the first functional layer (Fl) is made of NiCr or NiCrN having a thickness range of 0.1 nm to 30 nm; and the second functional layer (F2) is made of Nb or NbN having a thickness range of 2 nm to 35 nm, internal reflection (RC) of the solar control glass article is less than 15% and a ratio of said internal reflection (RC) to external reflection (RG) does not exceed 1.2.
  • the solar control glass article characterized in that when the first functional layer (Fl) is made of Nb or NbN having a thickness range of 0.1 nm to 30 nm; and the second functional layer (F2) is made of NiCr or NiCrN having a thickness range of 0.1 nm to 35 nm, the external reflection (RG) of the solar control glass article is less than 30% and a ratio of said external reflection (RG) to internal reflection (RC) does not exceed 2.
  • FIG. 1 illustrates a stack of thin layers deposited on a transparent glass substrate, according to one embodiment of the present disclosure
  • FIG. 2 illustrates a stack of thin layers deposited on a transparent glass substrate, according to one other embodiment of the present disclosure
  • FIG. 3 illustrates a stack of thin layer deposited on a transparent glass substrate according to the first major embodiment of the present disclosure
  • FIG. 4 illustrates a stack of thin layer deposited on a transparent glass substrate according to the second major embodiment of the present disclosure
  • FIG. 5 illustrates a plot between the internal reflection (RC) and external reflection (RG) for varying thickness ranges of Ml for samples 6 and 7;
  • FIG. 6 illustrates a plot between the internal reflection (RC) and external reflection (RG) for varying thickness ranges of M2 for samples 6 and 7;
  • FIG. 7 illustrates a plot between the internal reflection (RC) and external reflection (RG) for varying thickness ranges of M3 for samples 6 and 7;
  • FIG. 8 illustrates a plot between the internal reflection (RC) and external reflection (RG) for varying thickness of the functional materials NiCrN for samples 6 and 7;
  • FIG. 9 illustrates a color variation of a*G and b*G for varying thicknesses of NiCrN for samples 6 and 7;
  • FIG. 10 illustrates a plot between the internal reflection (RC) and external reflection (RG) for varying thickness of the functional materials NbN for samples 6 and 7;
  • FIG. 11 illustrates a color variation of a*G and b*G for varying thicknesses of NbN for samples 6 and 7.
  • FIG. 1 illustrates a structure of a stack of thin layer having two functional layers Fl, F2 deposited on a transparent substrate 10.
  • Each of the functional layers 50, 100 is positioned between dielectric coatings 20 (Ml), 40 (M2), 80 (M3) such that: the first functional layer 50, starting from the substrate, is positioned between the dielectric coatings 20, 40 and the second functional layer 100 is positioned between the dielectric coatings 40, 80.
  • the dielectric coatings 20, 40 and 80 each comprise at least one dielectric layer.
  • the stack of thin layers may further comprise barrier layers 49, 99 (not represented) deposited as under layers in contact with the functional layer and/or barrier layers 59, 109 (not represented) deposited as over layers in contact with the functional layer (not represented).
  • the stack of thin layers may further optionally comprise at least one overcoat layer 1000 (not represented) in contact with the dielectric coating 80 (M3). In such an embodiment the barrier layer 109 is in contact with the said overcoat layer 1000.
  • the optical properties of the transparent substrate bearing the stack of thin layers can be significantly influenced.
  • the major advantage of the invention is that it provides a solar control glass article whose visible transmission, internal and external reflection values and internal and external reflection color are tunable as desired. It is well known that the choice of material for the functional layers Fl, F2 significantly impacts the optical properties of a product but what is not known is the position of such chosen functional layer materials (from the surface of the glass substrate) significantly impacting the optical properties and hence an understanding of this positional relationship of the functional layer material opens up numerous opportunities to fine tune the optical properties of the product as desired.
  • the inventors have surprisingly found that the stack of thin layers proposed in the present invention (having different materials for Fl and F2) provide significantly improved solar control performance when compared to prior known stack of thin layers comprising identical materials for Fl and F2.
  • the label “first”, “second” for the functional layers and “first”, “second”, “third” for the dielectric coatings are defined starting from the substrate bearing the stack and with reference to the layers or coatings having the same function.
  • the functional layer closest to the substrate is the first functional layer
  • the one farthest from the substrate is the second functional layer.
  • the dielectric coating closest to the substrate is the first dielectric coating
  • the next one moving away from the substrate is the second dielectric coating etc.
  • Thicknesses stated in the present document with no other specifications are physical, real or geometric thicknesses and are expressed in nanometers (and not optical thicknesses).
  • the thin multilayer coating proposed by the present invention comprises in a first major embodiment: Glass
  • the thin multilayer coating comprises of:
  • thickness Tl of Fl comprising materials NiCr or NiCrN preferably ranges between 0.1 nm to 30 nm and thickness T2 of F2 comprising materials Nb or NbN preferably ranges between 2 nm to 35 nm.
  • the thickness Tl of Fl comprising the materials Nb or NbN preferably ranges between 0.1 nm to 30 nm and thickness T2 of F2 comprising materials NiCr or NiCrN preferably ranges between 0.1 nm to 35 nm.
  • thickness of dielectric coating 20 preferably ranges between 1 nm and 100 nm; thickness of dielectric coating 40 (M2) preferably is less than or equal to 65 nm; and thickness of dielectric coating 80 (M3) preferably ranges between 20 nm and 60 nm, inclusive of all said values mentioned for Ml, M2 and M3.
  • the three dielectric coatings 20, 40, 80 comprise at least one dielectric layer based on a material selected from silicon nitride, titanium nitride, aluminum nitride, oxynitrides of silicon and aluminum, silicon aluminium nitride, zinc oxide, tin and zinc oxide, tin oxide, titanium oxide, silicon oxide, aluminum oxide or titanium and tin oxide, alone or in combination.
  • the dielectric coatings 20, 40, 80 is made of silicon nitride.
  • the dielectric coatings 20, 40, 80 is made of silicon nitride doped with aluminum.
  • the dielectric coatings 20, 40, 80 satisfy the conditions: the total thickness of the dielectric layers 20, 40, 80 (M1+M2+M3) is less than or equal to 150 nm. According to few embodiments of the present invention, the thickness ratio of the first dielectric layer/third dielectric layer (M1/M3) is less than or equal to 2. According to certain other embodiments of the present invention, the thickness ratio of the first dielectric layer/third dielectric layer (M1/M3) is less than or equal to 4. Further, according to few exemplary embodiments of the present invention, the dielectric coating 40 (M2) may be absent. According to yet another alternative embodiment of the present invention, the dielectric coating 80 (M3) farthest from the glass substrate is made of metal oxide selected from the group consisting of TiO x , TiZrOx, NbO x or SiO x .
  • the stack of thin layers may further comprise barrier layers 49, 99 deposited as under layers in contact with the functional layer Fl and/or F2; barrier layers 59, 109 deposited as over layers in contact with the functional layer Fl and/or F2, as illustrated in FIG. 2.
  • the barrier layers 49, 99 or 59, 109 may be present such as to sandwich only one of the two functional layers Fl, F2.
  • the role of the barrier layers deposited over and below the functional layers Fl, F2 is conventionally to improve chemical durability or minimize tempering shift.
  • the barrier layers are made of either titanium or niobium or silicon aluminium or absorbing silicon nitride. When these barrier layers are deposited in metallic form, these layers may undergo a partial or complete oxidation depending on their thickness and the nature of the layers that surround them, for example, at the time of the deposition of the next layer or by oxidation in contact with the underlying layer. According to multiple embodiments of the present invention, the thickness of the barrier layers 49, 99, 59, 109, if present preferably ranges between 0.1 nm and 5 nm.
  • the stack of thin layers may further comprise at least one overcoat layer 1000 in contact with the dielectric coating 80 (M3), as illustrated in FIG. 2.
  • the overcoat layer 1000 comprises titanium zirconium nitride or oxynitride, zirconium oxide or titanium oxide or their combinations thereof. According to a preferred optional embodiment, the overcoat layer 1000 comprises titanium zirconium oxide.
  • the configuration of the stack of thin layers is designed such that the external reflection (RG) is higher and the internal reflection (RC) is lower. This is because the high external reflection (RG) provides privacy during the day time and the low internal reflection (RC) provides a clear view of the external environment.
  • high external reflection provides a mirror-like effect but the depth of required external aesthetic cannot be achieved. To achieve such aesthetics, low external reflection is required.
  • Such a change in desired optical characteristics can be brought about by the positional change of materials in Fl and F2 as will be taught by the present invention.
  • a solar control glass constructed having the below configuration of the stack of thin layers:
  • Dielectric Coating (Ml) NiCr or NiCrN (Fl)
  • Dielectric coating (M3) exhibits the following optical characteristics: internal reflection (RC) less than external reflection (RG); internal reflection (RC) less than 15%; ratio of internal reflection (RC) to external reflection (RG) not exceeding 1.2; external reflection (RG) values of a*G ranging between -15 to +5 and b*G ranging between -20 to +20; and
  • TL visible light transmission
  • a solar control glass constructed having the below configuration of the stack of thin layers:
  • Dielectric Coating (Ml) Nb or NbN (Fl)
  • Dielectric coating (M3) exhibits the following optical characteristics: external reflection (RG) less than internal reflection (RC) external reflection (RG) of less than 30%; ratio of external reflection (RG) to internal reflection (RC) not exceeding 2 external reflection (RG) values of a*G ranging between -15 to +15 and b*G ranging between -30 to +30; and
  • TL visible light transmission
  • the transparent substrates according to the present invention are preferably made of an inorganic rigid material, such as glass, or an organic material based on polymers (or made of polymer).
  • the substrate is preferably a sheet of glass or of glass-ceramic.
  • the substrate is preferably transparent, colorless (it is then a clear or extra-clear glass) or colored, for example colored blue, grey, green or bronze.
  • the glass is preferably of soda-lime-silica type, but it may also be made of glass of borosilicate or alumino-borosilicate type.
  • the substrate advantageously has at least one dimension greater than or equal to 1 m, or even 2 m and even 3 m.
  • the thickness of the substrate generally varies between 0.5 mm and 19 mm, preferably between 0.7 and 9 mm, in particular between 2 and 12 mm, or even between 4 and 10 mm.
  • the substrate may be flat or curved, or even flexible.
  • the material may undergo a high-temperature heat treatment such as an annealing, for example a flash annealing such as a laser or flame annealing and/or a tempering.
  • the temperature of the heat treatment is greater than 500° C, preferably greater than 550° C, and better still greater than 600° C.
  • the substrate coated with the stack may therefore be tempered.
  • the heat treated solar control glass article has a superior color matchability with a AE* of less than 4.0 for external reflection and transmission, according to a preferred embodiment.
  • the invention also relates to a glazing comprising a material according to the invention.
  • the faces of a glazing are denoted starting from the outside of the building and by numbering the faces of the substrates from the outside towards the inside of the passenger compartment or room that it equips. This means that the incident solar light passes through the faces in the increasing order of their number.
  • the stack is preferably positioned in the glazing so that the incident light coming from outside passes through the first dielectric coating before passing through the first functional layer Fl.
  • the stack is not deposited on the face of the substrate that defines the external wall of the glazing but on the inner face of this substrate.
  • the stack is therefore advantageously positioned on face 2, face 1 of the glazing being the outermost face of the glazing, as is customary.
  • the material may be intended for applications that require the substrate coated with the stack to have undergone a heat treatment at a high temperature such as a tempering or an annealing.
  • the glazing of the invention may be in the form of monolithic, laminated or multiple glazing, in particular double glazing or triple glazing.
  • the stack is preferably deposited on face 2, that is to say that it is on the substrate that defines the external wall of the glazing and more specifically on the inner face of this substrate.
  • a monolithic glazing comprises 2 faces; face 1 is on the outside of the building and therefore constitutes the external wall of the glazing, face 2 is on the inside of the building and therefore constitutes the internal wall of the glazing.
  • a multiple glazing comprises at least two substrates kept at a distance so as to delimit a cavity filled by an insulating gas (e.g., dry air, Ar, Kr or their mixture).
  • an insulating gas e.g., dry air, Ar, Kr or their mixture.
  • the materials according to the invention are very particularly suitable when they are used in double glazing with enhanced thermal insulation (ETI).
  • a double glazing comprises 4 faces; face 1 is outside of the building and therefore constitutes the external wall of the glazing, face 4 is inside the building and therefore constitutes the internal wall of the glazing, faces 2 and 3 being on the inside of the double glazing.
  • the stack may be on face 2, 3 or 4 of the glazing.
  • a triple glazing comprises 6 faces; face 1 is outside of the building (external wall of the glazing), face 6 is inside the building (internal wall of the glazing) and faces 2 to 5 are on the inside of the triple glazing.
  • a laminated glazing comprises at least one structure of first substrate/sheet(s)/second substrate type. The stack of thin layers is positioned on at least one of the faces of one of the substrates. The stack may be on the face of the second substrate not in contact with the, preferably polymer, sheet. This embodiment is advantageous when the laminated glazing is assembled as double glazing with a third substrate.
  • the monolithic glazing according to the invention comprising NiCr or NiCrN in Fl and Nb or NbN in F2
  • This along with a low internal reflection (RC) value of less than 15% aid in visual comfort for people facing the interior.
  • the glazing has internal reflection values of a*C ranging between -15 to +30 and b*C ranging between -30 to +30.
  • these visual appearance remains virtually unchanged irrespective of the angle of incidence with which the glazing is observed (normal incidence and under an angle). This means that an observer does not have the impression of a significant lack of uniformity in color or in appearance.
  • the monolithic glazing according to the invention comprising Nb or NbN in Fl and NiCr or NiCrN in F2
  • This along with an external reflection (RG) of less than 30% aid in privacy for people facing the interior of the building.
  • the glazing has external reflection values of a*G ranging between -15 to +15 and b*G ranging between -30 to +30.
  • This along with in internal reflection (RC) value less than equal to 50% aid in visual comfort for people interior of the gl3zing.
  • these visual appearance remains virtually unchanged irrespective of the angle of incidence with which the glazing is observed (normal incidence and under an angle). This means that an observer does not have the impression of a significant lack of uniformity in color or in appearance.
  • the glazing of the invention has colors in transmission in the L*a*b* color measurement system: a*T between -7 to +7, preferably between -6 to +5; and b*T between -20 to +20, preferably between -12 to +15, when NiCr or NiCrN is present in Fl and Nb or NbN is present in F2.
  • the glazing of the invention has colors in transmission in the L*a*b* color measurement system: a*T between -10 to +10, preferably between -7 to +8; and b*T between -20 to +20, preferably between -15 to +18, when Nb or NbN is present in Fl and NiCr or NiCrN is present in F2.
  • the glazing of the invention has, in particular, according to the first and second major embodiments the following performances: a solar factor less than or equal to 80%, preferably less than or equal to 70%.
  • the stack is deposited by magnetron sputtering.
  • all the layers of the stack are deposited by magnetron sputtering.
  • the invention also relates to the process for obtaining a material according to the invention, wherein the layers of the stack are deposited by magnetron sputtering.
  • Stack of thin layers are deposited on substrates made of clear soda-lime glass with a thickness of 6 mm.
  • the functional layer is either NbN or NiCrN; and the dielectric layers are based on silica nitride, doped with aluminum (SisN ⁇ Al).
  • Table 1 lists the materials and thicknesses in nanometers for each layer or coating that forms the stacks as a function of their position with respect to the substrate bearing the stack (final line at the bottom of the table).
  • the “Ref.” numbers correspond to the references from FIG. 1, for samples 1 and 2.
  • comparative sample 1 is constructed from the prior art reference Indian application of the present Applicant: 4163/KOLNP/2010;
  • comparative sample 2 is constructed from the prior art reference EP0747329A1 and
  • comparative sample 3 is constructed from the prior art reference WO2017160325.
  • Table 2 lists the main optical characteristics measured when the glazings are part of a monolithic glazing of 6 mm glass. For these monolithic glazings:
  • TL indicates: the light transmission in the visible region in %, measured according to the illuminant D65 Obs 2; a*T and b*T indicate the a* and b* colors in transmission in the L*a*b* system measured according to the illuminant D65 Obs 2 and measured perpendicularly to the glazing;
  • RG indicates: the light reflection in the visible region in %, measured according to the illuminant D65 Obs 2 on the glass side of the glazing; a*G and b*G indicate the a* and b* colors in reflection in the L*a*b* system measured according to the illuminant D65 Obs 2 on the glass side of the glazing and thus measured perpendicularly to the glazing;
  • RC indicates: the light reflection in the visible region in %, measured according to the illuminant D65 Obs 2 on the coating side of the glazing; a*C and b*C indicate the a* and b* colors in reflection in the L*a*b* system measured according to the illuminant D65 Obs 2 on the coating side of the glazing and thus measured perpendicularly to the glazing.
  • the main optical characteristics of the comparative samples 1 - 3 were constructed from the patent information present in the corresponding prior art references.
  • comparative samples 1 and 2 comprising identical materials in Fl and F2 either NbN orNiCr, do not achieve internal reflection (RC) and external reflection (RG) values as that achieved by the samples prepared according to the present invention. It can also be seen that the internal reflection for these samples are always higher than the external reflection value. Although comparative sample 3 has internal reflection lower than external reflection, the invention comprises different materials in Fl and F2.
  • the primary reason for the difference between reflection level is the optical property of NiCr or NiCrNx compared with Niobium or Niobium nitride.
  • samples 3 - 5 were constructed from the stack of thin layers, according to the present invention demonstrated in Table 3.
  • the stack of thin layers constructed according to the teaching of the first major embodiment of the present invention has a ratio of internal reflection (RC) to external reflection (RG) not exceeding 1.2. Whereas none of the comparative samples satisfy this condition and have values that are much higher demonstrating that these stack configurations from prior art do not achieve the internal reflection (RC) to external reflection (RG) as that desired by the present invention.
  • Stack of thin layers having the stack configuration as shown in table 6 were used to demonstrate the positional impact of NiCr / NiCrN in Fl on the internal reflection (RC).
  • the thickness of Ml in samples 6 & 7 were varied from 10 nm to 60 nm, while the thickness of M2 was maintained at 20 nm and thickness of M3 was maintained at 30 nm. Internal reflection (RC) and external reflection (RG) values obtained for the different thickness values of Ml were plotted for samples 6 & 7 and the same is illustrated in FIG. 5.
  • the thickness of M2 in samples 6 & 7 were varies from 10 nm to 60 nm, while the thickness of Ml was maintained at 10 nm and thickness of M3 was maintained at 30 nm.
  • Internal reflection (RC) and external reflection (RG) values obtained for the different thickness values of M2 were plotted for samples 6 & 7 and the same is illustrated in FIG. 6.
  • the thickness of M3 in samples 6 & 7 were varies from 10 nm to 60 nm, while the thickness of Ml was maintained at 10 nm and thickness of M2 was maintained at 30 nm.
  • Internal reflection (RC) and external reflection (RG) values obtained for the different thickness values of M3 were plotted for samples 6 & 7 and the same is illustrated in FIG. 7.
  • the thickness of Ml, M2 and M3 were fixed at 20 nm, 20 nm and 30 nm, respectively and the thickness of Fl and F2 were varied.
  • FIG. 8 demonstrates the influence of varying thicknesses of NiCrN on RG and RC values of samples 6 and 7. Further, the influence of varying thicknesses of NiCrN on color variation of a*G and b*G was also plotted and shown in FIG. 9
  • the thickness of NiCrN in samples 6 & 7 was fixed at 3.5 nm and the thickness of NbN in samples 6 & 7 was varied from 0.5 nm to 10 nm and the corresponding internal reflection (RC) and external reflection (RG) values obtained were plotted and shown in FIG. 10.
  • FIG. 10 demonstrates the influence of varying thicknesses of NbN on RG and RC values of samples 6 and 7. Further, the influence of varying thicknesses of NbN on color variation of a*G and b*G was also plotted and shown in FIG. 11.
  • samples 6 has significantly reduced color variation, for varying thicknesses of NiCrN in Fl. Whereas for varying thicknesses of NbN, the color variation is irrespective of the position of NbN in Fl or F2.
  • the solar control glass article described in the present disclosure finds application as a glazed element in building.
  • the glazing may form a monolithic glazing with the coating side of the glass arranged facing the closed space inside the building.
  • the glazing may also form a laminated glazing whose stack of layers may be in contact with the thermoplastic adhesive material connecting the substrates, in general PVB.
  • the glazing may also be part of an insulation glazing window.
  • the glazing of the present disclosure can also be annealed, strengthened, toughened and/or tempered.
  • the tempered glazing can also be used in building wall cladding panel of curtain walling for interior applications. Further an also be used as a side window, rear window or sunroof for an automobile or other vehicle.
  • the terms “comprises,” “comprising,” “includes,” “including,” “has,” “having” or any other variation thereof, are intended to cover a non-exclusive inclusion.
  • a method, article, or apparatus that comprises a list of features is not necessarily limited only to those features but may include other features not expressly listed or inherent to such method, article, or apparatus.
  • “or” refers to an inclusive-or and not to an exclusive-or. For example, a condition A or B is satisfied by any one of the following: A is true (or present) and B is false (or not present), A is false (or not present) and B is true (or present), and both A and B are true (or present).
  • TITLE A SOLAR CONTROL GLASS ARTICLE WITH VARIABLE OPTICAL PROPERTIES

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Abstract

Est divulgué un matériau comprenant un substrat transparent déposé par empilement de couches minces sur au moins une de ses surfaces pour agir sur le rayonnement solaire et/ou infrarouge susceptible de frapper ladite surface. L'empilement de couches minces comprend successivement, à partir du substrat pas plus de deux couches fonctionnelles F1, F2 à base de NiCr/NiCrN ou de Nb/NbN et trois revêtements diélectriques M1, M2, M3 comprenant au moins une couche diélectrique de telle sorte que chaque couche fonctionnelle métallique est prise en sandwich entre deux revêtements diélectriques. Le matériau de l'invention a une influence considérable sur les propriétés optiques de l'article en verre de contrôle solaire résultant de telle sorte que la variation de la position du matériau de couche fonctionnelle F1, F2 provoque une variation des propriétés optiques pour répondre aux divers domaines d'application.
PCT/IN2022/050970 2021-11-08 2022-11-04 Article en verre de contrôle solaire présentant des propriétés optiques variables WO2023079577A1 (fr)

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CONC2024/0007157A CO2024007157A2 (es) 2021-11-08 2024-06-06 Un artículo de vidrio de control solar con propiedades ópticas variables

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WO2023079577A9 true WO2023079577A9 (fr) 2023-07-27

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Publication number Priority date Publication date Assignee Title
FR2931147B1 (fr) * 2008-05-19 2010-11-19 Saint Gobain Vitrage muni d'un empilement de couches minces
FR3013043B1 (fr) * 2013-11-08 2015-11-20 Saint Gobain Substrat revetu d'un empilement a couches fonctionnelles presentant des proprietes mecaniques ameliorees

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