KR102531278B1 - Functional building material including low-emissivity coat for windows and insulated glazing - Google Patents

Abstract

It includes a transparent substrate and a low-emissivity coating formed on one surface of the transparent substrate, wherein the low-emissivity coating includes at least two layers of low-emissivity including a first low-emissivity layer and a second low-emissivity layer sequentially positioned on the transparent substrate. floor; a chromium nitride layer disposed between the transparent substrate and the first low-emissivity layer and containing chromium nitride; and a titanium oxide layer disposed between the first low-emission layer and the second low-emissivity layer and containing titanium oxide.

Description

Functional building materials for windows and double glazing {FUNCTIONAL BUILDING MATERIAL INCLUDING LOW-EMISSIVITY COAT FOR WINDOWS AND INSULATED GLAZING}

The present invention relates to a functional building material for windows and doors and a double-glazed glass.

Low-emissivity glass refers to glass in which a low-emissivity layer including a metal having high reflectivity in an infrared region, such as silver (Ag), is deposited as a thin film. This low-emissivity glass is a functional material that reduces energy consumption of buildings by reflecting infrared radiation to block outdoor solar radiation in summer and to preserve indoor heating radiation in winter.

Since silver (Ag) generally used as a low-emissivity layer is oxidized when exposed to air, a dielectric layer is deposited as an anti-oxidation film on top and bottom of the low-emissivity layer. This dielectric layer also serves to increase visible light transmittance.

An object of the present invention is to provide a functional building material for windows and doors having a structure in which a low-emission coating is coated on a transparent substrate, high insulation, high shielding performance, and green color.

Another object of the present invention is to provide a double-glazed glass using the functional building material for windows and doors without using green glass.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned above can be understood by the following description and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by means of the instrumentalities and combinations indicated in the claims.

In one embodiment of the present invention, a functional building material for windows and doors is provided.

In addition, in one embodiment of the present invention, a double-glazed glass using the functional building material for windows and doors is provided.

The functional building material for windows and doors according to the present invention can implement high insulation, high shielding performance, and a green color preferred for residential use.

In addition, the double-glazed glass according to the present invention does not include green glass, and has a structure in which a low-emission coating is coated on a transparent substrate, and can implement high insulation, high shielding performance, and green color.

In addition to the effects described above, specific effects of the present invention will be described together while explaining specific details for carrying out the present invention.

1 schematically shows a cross section of a functional building material for windows and doors according to an embodiment of the present invention.
2 schematically shows a cross section of a functional building material for windows and doors according to an embodiment of the present invention.
3 schematically shows a cross section of a functional building material for windows and doors according to one embodiment of the present invention.
4 schematically shows a cross section of a functional building material for windows and doors according to one embodiment of the present invention.
5 schematically shows a cross section of a functional building material for windows and doors according to one embodiment of the present invention.
6 schematically shows a cross section of a functional building material for windows and doors according to one embodiment of the present invention.
7 schematically shows a cross section of a functional building material for windows and doors according to one embodiment of the present invention.
8 schematically shows a cross section of a double-glazed glass according to an embodiment of the present invention.

The above objects, features and advantages will be described later in detail with reference to the accompanying drawings, and accordingly, those skilled in the art to which the present invention belongs will be able to easily implement the technical spirit of the present invention. In describing the present invention, if it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

Hereinafter, the arrangement of an arbitrary element on the "upper (or lower)" or "upper (or lower)" of a component means that an arbitrary element is placed in contact with the upper (or lower) surface of the component. In addition, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.

In addition, when a component is described as "connected", "coupled" or "connected" to another component, the components may be directly connected or connected to each other, but other components may be "interposed" between each component. ", or each component may be "connected", "coupled" or "connected" through other components.

Hereinafter, functional building materials for windows and doors according to some embodiments of the present invention will be described.

In one embodiment of the present invention, a functional building material for windows and doors including a transparent substrate and a low-emission coating formed on one surface of the transparent substrate is provided. The low-emissivity coating may include: at least two low-emissivity layers including a first low-emissivity layer and a second low-emissivity layer sequentially positioned on the transparent substrate; a titanium oxide layer disposed between the first low-emissivity layer and the second low-emissivity layer and including titanium oxide; and a titanium oxide layer disposed between the first low-emissivity layer and the second low-emissivity layer and including titanium oxide.

The functional building material for windows includes at least two layers of low-emissivity layers to improve (lower) emissivity to achieve high thermal insulation performance, while maintaining a certain level of transmittance while increasing shielding rate, and changing the transmitted color to residential use. It can be implemented in the preferred green color.

Since the existing low-emissivity glass cannot realize a green-based color as the transmitted color of the low-emissivity glass without reducing the emissivity, high insulation performance, and high shielding performance required of the low-emissivity glass, green glass is used together with the low-emissivity glass. It was used to manufacture double-layer glass. That is, one side of the double-glazed glass is made of green glass, and the other side is made of low-emissivity glass. Green glass is glass produced by adjusting the components of the glass itself to be green.

The functional building material for windows and doors does not reduce the emissivity, high thermal insulation performance and high shielding performance required for low-emissivity glass, and imparts a green color by low-emissivity coating, so there is no need to use green glass, Green can be realized by applying to a transparent substrate such as transparent glass.

The functional building material for windows and doors is easy to apply to various structures such as a single-panel structure and a multi-layer structure by embodying a green color while maintaining excellent functionality of the existing low-emissivity coated low-emissivity glass.

1 schematically shows a cross section of a functional building material 100 for windows and doors according to one embodiment of the present invention.

1, the functional building material 100 for windows and doors includes a low-emissivity coating 90 on top of a transparent substrate 10, and in the low-emissivity coating 90, a chromium nitride layer 21, a first low-emissivity coating The layer 11, the titanium oxide layer 31 and the second low-emissivity layer 12 are sequentially stacked.

The low-emissivity coating 90 may be formed as shown in FIG. 1 in a multilayer thin film structure based on the low-emissivity layers 11 and 12 that selectively reflect far-infrared rays among solar radiation, and the low-emissivity coating 90 Thermal insulation performance may be exhibited by a low-e (low emissivity) effect due to low emissivity characteristics.

The low-emissivity coating 90 is formed as a multi-layered laminate as described above, applied as a coating film of the transparent substrate 10, and can be used as, for example, a functional building material for windows and doors such as window glass. The functional building material 100 for windows and doors is a functional material that reflects outdoor solar radiant heat in summer and preserves indoor heating radiant heat in winter, thereby minimizing heat transfer between indoors and outdoors, resulting in energy saving effects of buildings.

The low-emissivity layers 11 and 12 refer to layers having low infrared emissivity. Emissivity refers to the rate at which an object absorbs, transmits, and reflects energy having a certain specific wavelength. The infrared emissivity represents the degree of absorption of infrared energy in the infrared wavelength region. Specifically, the infrared emissivity refers to a ratio of infrared energy absorbed with respect to applied infrared energy when far infrared rays corresponding to a wavelength range of about 5 μm to about 50 μm showing strong thermal action are applied.

According to Kirchhoff's law, since the infrared energy absorbed by an object is the same as the infrared energy re-radiated by the object, the absorptivity and emissivity of the object are the same.

In addition, since the infrared energy that is not absorbed is reflected from the surface of the object, the higher the reflectance of the infrared energy of the object, the lower the emissivity. If this is expressed numerically, it has a relationship of (emissivity = 1 - infrared reflectance).

Such emissivity may be measured through various methods commonly known in this field, and may be measured, for example, by equipment such as a Fourier transform infrared spectrometer (FT-IR) according to the KSL2514 standard.

An absorptance, that is, an emissivity of far-infrared rays exhibiting such a strong thermal action of any object, for example, low-emissivity glass, may represent a very important meaning in measuring thermal insulation performance.

The functional building material 100 for windows and doors is an energy-saving functional building material for windows and doors that can maintain a predetermined transmission characteristic in the visible light region to realize excellent lighting properties, while providing excellent insulation by lowering the emissivity in the infrared region. am. Such a functional building material for windows is also referred to as 'low-e glass'.

The low-emissivity layers 11 and 12 are layers formed of an electrically conductive material capable of having low emissivity, for example, metal, that is, have low sheet resistance and thus have low emissivity. For example, the low-emissivity layers 11 and 12 (150) may have an emissivity of about 0.01 to about 0.2, specifically about 0.01 to about 0.1, and more specifically about 0.01 to about 0.05, , more specifically from about 0.01 to about 0.03.

The low-emissivity layers 11 and 12 in the above emissivity range can simultaneously implement excellent light-lighting properties and heat insulation effects by appropriately adjusting visible light transmittance and infrared emissivity. The low-emissivity layers 11 and 12 having the above emissivity may have a sheet resistance of, for example, about 0.78 Ω/sq to about 6.42 Ω/sq, but are not limited thereto.

The low-emissivity layers 11 and 12 perform a function of selectively transmitting and reflecting solar radiation, and specifically, have high reflectance for radiation in the infrared region and have low emissivity. The low-emission layers 11 and 12 may include at least one selected from the group consisting of Ag, Au, Cu, Al, Pt, ion-doped metal oxides, and combinations thereof, but are not limited thereto, and low-emissivity Any metal known to be capable of realizing the performance may be used without limitation. The ion-doped metal oxide includes, for example, indium tin oxide (ITO), fluorine-doped tin oxide (FTO), Al-doped zinc oxide (AZO), gallium zinc oxide (GZO), and the like. In one embodiment, the low-emissivity layers 11 and 12 may be layers formed of silver (Ag), and the low-emissivity coating 90 including the same has high electrical conductivity, low absorption in the visible ray region, durability, etc. can be implemented.

The thickness of the low-emission layers 11 and 12 (for each of the plurality of layers) may be, for example, about 5 nm to about 20 nm, specifically, about 12 nm to about 18 nm. The low-emissivity layer 11 having a thickness within the above range is suitable for implementing low infrared emissivity and high visible light transmittance at the same time.

The low-emissivity coating 90 is because the low-emissivity layers 11 and 12 have a double-roy structure including a plurality of layers of two or more layers of the first low-emissivity layer 11 and the second low-emissivity layer 12 The emissivity can be further lowered, and the lowered emissivity improves the insulation performance, and can also be adjusted to a green color.

Low-emissivity glass that implements a green color by using two layers of existing green glass together, when a double low-emissivity coating containing two low-emissivity layers is applied, the color of the low-emissivity glass is the same as the green color of the green glass. Added together, the resulting color will deviate from green. Therefore, the low-emissivity glass forming the double-glazed glass together with the green glass had to include only one layer of the low-emissivity layer among the low-emissivity coatings.

On the other hand, since the functional building material for windows and doors is not used with green glass, a double low-emission structure including two low-emission layers should be applied to realize green color, and as a result, the advantage of the double low-e structure, That is, it is possible to have the advantage of further lowering the emissivity and improving the thermal insulation performance.

The chromium nitride layer 21 controls the color and improves durability, and the titanium oxide layer 31 acts so that the transmittance does not decrease. Therefore, the functional building material 100 for windows and doors includes the chromium nitride layer 21, the first low-emissivity layer 11, the titanium oxide layer 31, and the second low-emissivity layer 12 in this order. By including (21) and the titanium oxide layer 31 together, the overall transmittance is maintained at a certain level so as not to decrease, and at the same time, the transmission color can be implemented as a green color.

The chromium nitride layer 21 is a layer formed of chromium nitride (CrNx, x is a stoichiometric ratio) as a main component.

The chromium nitride layer 21 is interposed between the transparent substrate 10 and the first low-emission layer 11 to improve durability.

The thickness of the chromium nitride layer 21 may be about 1 nm to about 5 nm, and specifically, about 2 nm to about 3 nm. When the chromium nitride layer 21 has a thickness within the above range, durability of the low-emissivity coating 90 is effectively improved, color control is possible, and it can be easily designed in a green color.

The titanium oxide layer 31 is a layer formed of titanium oxide (TiOx, where x is a stoichiometric ratio) as a main component.

The titanium oxide layer 31 exists between the two low-emission layers 11 and 12 to maintain a predetermined transmittance.

The titanium oxide layer 31 may have a thickness of about 3 nm to about 15 nm, and specifically, about 5 nm to about 12 nm. When the titanium oxide layer 31 has a thickness within the above range, the transmittance of the low-emissivity coating 90 is effectively improved and color control is possible, so that the transmittance color can be easily designed as green.

In one embodiment, the color index L* value measured using a color difference meter for the transmitted color of the functional building material 100 for windows and doors is about 75.0 to about 85.0, and the color index a* value is about -4 to about -10, and the color index b* value may be from about 0 to about 6. A color index value within the above numerical range indicates that a green color preferred for residential use is implemented.

The color index values are L, a*, and b* values measured according to the CIE1931 standard using a color difference meter (KONICA MINOLTA SENSING, Inc., CM-700d) and applying D65 of the KS standard to the light source.

The color index value is a value measured for the transmission color of the functional building material 100 for windows and doors, and is measured on either the non-coated surface of the transparent substrate 10 or the coated surface coated with the low-emission coating 90. However, it is measured with the same value.

In one embodiment of the present invention, the low-emissivity coating may include a first dielectric layer 41 laminated on a surface of the chromium nitride layer 21 facing the transparent substrate 10; and a second dielectric layer 42 stacked on a surface of the chromium nitride layer 21 facing the first low-emissivity layer 11 .

In FIG. 2, a cross section of the functional building material 200 for windows and doors is schematically shown.

In FIG. 2 , the first dielectric layer 41, the chromium nitride layer 21, and the second dielectric layer 42 are shown to be disposed in contact with each other, but are not necessarily limited thereto. Hereinafter, in other drawings of this specification, each layer may be shown to be disposed in contact with each other for convenience of description and understanding, but unless otherwise specified, it is not limited to a configuration in which it is disposed in contact with each other.

In one embodiment of the present invention, the low-emissivity coating includes a third dielectric layer 51 positioned between the titanium oxide layer 31 and the first low-emissivity layer 11; and a fourth dielectric layer 52 positioned between the titanium oxide layer 31 and the second low-emissivity layer 12 .

In FIG. 3, a cross section of the functional building material 200 for windows and doors is schematically shown.

In FIG. 3 , the third dielectric layer 51 , the titanium oxide layer 31 , and the fourth dielectric layer 52 are shown to be disposed in contact with each other, but are not necessarily limited thereto. Hereinafter, in other drawings of this specification, each layer may be shown to be disposed in contact with each other for convenience of description and understanding, but unless otherwise specified, it is not limited to a configuration in which it is disposed in contact with each other.

The first dielectric layer 41, the second dielectric layer 42, the third dielectric layer 51 and the fourth dielectric layer 52 are made of tin zinc oxide, zinc oxide, zinc aluminum oxide, tin oxide, bismuth oxide, nitride It may include at least one selected from the group consisting of silicon, silicon aluminum nitride, silicon oxynitride aluminum, silicon nitride tin, and combinations thereof.

The dielectric layers 41, 42, 51, and 52 may have a single-layer structure or a multi-layer structure in which a plurality of layers are successively stacked according to a desired color expression or physical properties to be realized, respectively, depending on a predetermined purpose. .

The dielectric layers 41, 42, 51, and 52 can act as an anti-oxidation film of the low-emissivity layers 11 and 12, since the metal used for the low-emission layers 11 and 12 is generally easily oxidized. The dielectric layers 41, 42, 51, and 52 also serve to increase visible light transmittance. In addition, the optical performance of the low-emission coating 90 may be adjusted by appropriately adjusting the material, physical properties, and number of layers of the dielectric layers 41 , 42 , 51 , and 52 . By appropriately adjusting the material and physical properties, the number of layers, and each thickness of the dielectric layers 41, 42, 51, and 52, the functional building material for windows maintains a certain level of transmittance while exhibiting high insulation and high shielding performance. In addition, the transmission color can help implement a useful green-based color for residential use.

In one embodiment of the present invention, the first dielectric layer 41 and the second dielectric layer 42 may each include silicon aluminum nitride).

In one embodiment of the present invention, the third dielectric layer 51 and the fourth dielectric layer 52 may each include zinc aluminum oxide (ZAO).

The first dielectric layer 41, the second dielectric layer 42, the third dielectric layer 51, and the fourth dielectric layer 52 may be formed as a single layer or multiple layers, respectively.

4 schematically shows a cross section of the functional building material 400 for windows and doors according to one embodiment of the present invention.

4, the second dielectric layer 42 has a multilayer structure including a second lower dielectric layer 4201 including aluminum nitride and a second upper dielectric layer 4202 including aluminum zinc oxide, and the multilayer structure The second dielectric layer 42 is stacked in a direction in which the second lower dielectric layer 4201 contacts the chromium nitride layer 21 .

In FIG. 4, the third dielectric layer 51 has a multilayer structure including a third lower dielectric layer 5101 including aluminum zinc oxide and an upper third dielectric layer 5102 including aluminum nitride, and the multilayer structure The third dielectric layer 51 is stacked in a direction in which the third dielectric upper layer 5102 contacts the titanium oxide layer 31 .

5 schematically shows a cross section of a functional building material 500 for windows and doors according to one embodiment of the present invention.

The low-emissivity coating 90 may further include light-absorbing metal layers 61, 62, 63, and 64 disposed above and below the first low-emissivity layer 11 and the second low-emissivity layer 12, respectively. there is.

The light-absorbing metal layers 61, 62, 63, and 64 are made of metals with excellent light-absorbing performance and function to control sunlight, and are implemented by the low-emission coating 90 by adjusting the material and thickness. You can adjust the color.

Specifically, the light absorbing metal layers 61, 62, 63, and 64 may have an extinction coefficient of about 1.5 to about 3.5 in the visible light region. The extinction coefficient is a value derived from an optical constant, which is an inherent property of a material, and the optical constant is expressed as n-ik. In this case, the real part, n, is the refractive index, and the imaginary part, k, is called the extinction coefficient (also called absorption coefficient, extinction coefficient, extinction coefficient, etc.). The extinction coefficient is a function of wavelength (λ), and it is common for metals to have an extinction coefficient greater than zero. The extinction coefficient, k, has a relationship between the absorption coefficient, α, and α=(4πk)/λ, and the absorption coefficient, α, has a relationship of I=I0exp(-αd) when the thickness of the medium through which light passes is d. Due to the absorption of light by the medium, the intensity of the passed light (I) is reduced compared to the intensity of the incident light (I0).

The light absorbing metal layers 61, 62, 63, and 64 use a metal having an extinction coefficient in the visible ray region within the above range to absorb a certain portion of visible light, so that the low-emission coating 90 can obtain a predetermined color. let it have

For example, the light absorbing metal layers 61, 62, 63, and 64 may include at least one selected from the group consisting of Ni, Cr, alloys of Ni and Cr, and combinations thereof, but is not limited thereto. .

The light absorbing metal layers 61 , 62 , 63 , and 64 may be included as a single layer or a plurality of layers, and may be positioned on one side or both sides of the low-emissivity layers 11 and 12 . 5 illustrates a case in which light absorbing metal layers 61 , 62 , 63 , and 64 are formed as a plurality of layers on both sides of the low-emission layers 11 and 12 .

The thickness of each of the light absorbing metal layers 61, 62, 63, and 64 may be, for example, about 0.5 nm to about 10 nm, specifically, about 0.5 nm to about 5 nm, but is not limited thereto. , can be appropriately changed according to the purpose. The light absorbing metal layers 61, 62, 63, and 64 are formed within the above thickness range, so that they are suitable for adjusting to have predetermined transmittance and reflectance while performing a role as the light absorbing metal layers 61, 62, 63, and 64.

6 schematically shows a cross section of a functional building material 600 for windows and doors according to an embodiment of the present invention.

The low-emissivity coating 90 may further include an upper dielectric layer 71 positioned on a surface of the second low-emissivity layer 12 facing the outside of the coating surface.

The upper dielectric layer 71 is at least selected from the group consisting of tin zinc oxide, zinc oxide, zinc aluminum oxide, tin oxide, bismuth oxide, silicon nitride, silicon aluminum nitride, silicon aluminum oxynitride, silicon tin nitride, and combinations thereof. may contain one.

A detailed description of the upper dielectric layer 71 is the same as that of the dielectric layers 31 and 32 described above.

The upper dielectric layer 71 may have a single-layer structure or a multi-layer structure in which a plurality of layers are successively stacked according to a desired color expression or physical properties to be implemented, depending on a predetermined purpose.

7 schematically shows a cross section of a functional building material 700 for windows and doors according to one embodiment of the present invention.

In one embodiment of the present invention, the upper dielectric layer 71 includes an upper dielectric lower layer 7101 comprising zinc aluminum oxide and an upper dielectric upper layer 7102 comprising silicon aluminum nitride, and the transparent substrate 10 The upper dielectric lower layer 7101 and the upper dielectric upper layer 7102 may be sequentially stacked in a direction toward the outside of the coating surface in a multilayer structure.

The low-emissivity coating 90 may further include additional layers other than the above structure in order to implement predetermined optical performance.

The transparent substrate 10 may be a transparent substrate having a high visible light transmittance, and may be, for example, glass (colorless transparent glass) or a transparent plastic substrate having a visible light transmittance of about 80% to about 100%. The transparent substrate 10, for example, glass used for construction may be used without limitation, and may have a thickness of, for example, about 2 mm to about 12 mm, and may vary depending on the purpose and function of use, and thus It is not limited.

In order to manufacture the functional building material for windows and doors, first, the transparent substrate 10 is prepared, and then each layer of the low-emission coating 90 may be sequentially formed. Each layer of the low-emission coating 90 may be formed by a method suitable for realizing desired physical properties according to a known method.

For example, the low-emission layers 11 and 12, the chromium nitride layer 21, the titanium oxide layer 31, the dielectric layers 41, 42, 51, and 52, the light-absorbing metal layers 61, 62, 63, and 64 , the upper dielectric layer 71 and the like can be formed by a method such as sputtering.

The functional building materials for windows and doors (100, 200, 300, 400, 500, 600, 700) may be installed such that the surface of the transparent substrate 10 faces outward and the surface of the low-emission coating 90 faces inward. .

Alternatively, the functional building materials for windows and doors (100, 200, 300, 400, 500, 600, 700) are installed so that the surface of the transparent substrate 10 faces the outside and the surface of the low-emission coating 90 faces the inside , It may be installed as so-called double-glazed glass, which forms an internal space together with an additional transparent substrate spaced apart from the surface of the low-emission coating 90 at regular intervals.

In one embodiment of the invention:

a low-emissivity coated substrate including a first transparent substrate and a low-emissivity coating formed on one surface of the first transparent substrate; and

A second transparent substrate formed spaced apart from the low-emissivity coating; includes,

The low-emissivity coating may include at least two low-emissivity layers including a first low-emissivity layer and a second low-emissivity layer sequentially positioned on the first transparent substrate; a chromium nitride layer disposed between the first transparent substrate and the first low-emissivity layer and containing chromium nitride; and a titanium oxide layer disposed between the first low-emissivity layer and the second low-emissivity layer and including titanium oxide.

8 is a schematic cross-sectional view of a double-glazed glass 800 according to an embodiment of the present invention.

In FIG. 8 , the low-emissivity coated substrate 101 includes a first transparent substrate 10 and a low-emissivity coating 90 . The low-emission coating substrate 101 together with the second transparent substrate 15 formed to be spaced apart from the low-emission coating 90 at a predetermined interval constitutes the double-layer glass 800 . The low-emissivity coating substrate 101 and the second transparent substrate 15 are spaced apart at a predetermined interval, and a hollow layer A is formed therebetween.

The hollow layer (A) may be sealed so that the low-emissivity coating 90 is not corroded or oxidized.

The hollow layer (A) may be filled with an air layer (Air) or an inert gas such as argon or krypton.

The low-emission coating substrate 101 may use the functional building materials 100, 200, 300, 400, 500, 600, and 700 for windows and doors. Specifically, it may be any one of the functional building materials for windows and doors shown in FIGS. 1 to 7 described by various embodiments of the present invention.

A detailed description of the low-emission coating substrate 101 is the same as that of the functional building materials 100, 200, 300, 400, 500, 600, and 700 for windows and doors described above. Accordingly, the detailed description of each layer is also the same.

A detailed description of the second transparent substrate 15 is the same as that of the first transparent substrate 10 or the transparent substrate among functional building materials for windows and doors described above.

In the double-glazed glass 800, as described above, the low-emissivity coated substrate 101 can lower emissivity and realize high thermal insulation performance, and specifically, the low-emissivity coated substrate 101 has about 3.5% or less , More specifically, an emissivity of about 1% to about 3% may be implemented.

In addition, as the double-glazed glass 800 can implement a green-based color through the transmitted color of the low-emissivity coated substrate 101, the low-emissivity coated substrate 101 is placed outdoors while the low-emissivity coated substrate 101 The coating 90 may be disposed facing the hollow layer (A). Due to the arrangement of the low-emission coating 90, the double-glazed glass 800 can realize high shielding performance. This is to improve the point where there was a limitation in improving the shielding performance of the arrangement of the low-emissivity coating in existing commercial products in which green glass is disposed on the outdoor side and low-emissivity glass is disposed on the indoor side.

In this way, the double-glazed glass 800 realizes high shielding performance by lowering the SHGC (solar heat acquisition coefficient, g-value) by using the low-emission coating substrate 101 implementing the above-described green color. . For example, the double-glazed glass 800 may have an SHGC of about 0.280 to about 0.300.

SHGC (solar heat gain coefficient, g-value) and LSG (light to solar gain) value can be measured by the following formula 1.

[Calculation 1]

SHGC = (energy passed through double glazing and transmitted to the inside) / (energy incident on double glazing)

SHGC (solar heat acquisition coefficient) can be obtained as a value calculated through the Window 7.4 program using the optical spectrum measurement and emissivity results.

The transmittance may be calculated based on the KS L 2514 standard after measuring the optical spectrum.

Emissivity can be calculated by the formula of 100%-(average far-infrared reflectance) after measuring the far-infrared reflectance spectrum and calculating the average far-infrared reflectance according to the KS 2514 standard.

The low-emission coating substrate 101 of the double-glazed glass 800 is installed in a direction in which the second transparent substrate 15 is located on the outside and the second transparent substrate 15 is located on the inside, and the low-emissivity coating 90 is a hollow layer (A) ), the color index L* value measured using a color difference meter for the transmitted color of the double-glazed glass 800 is about 70.0 to about 80.0, and the color index a* value is about -4 to about - 10, and the color index b* value may be from about 0 to about 6. The color index value of the transmitted color of the double-glazed glass 800 indicates that a green color is implemented. The transmitted color of the double-glazed glass 800 is the same when measured on both the indoor and outdoor sides.

Examples and comparative examples of the present invention are described below. Such examples described below are only examples of the present invention, and the present invention is not limited to the examples described below.

(Example)

Example 1

Using a magnetron sputtering deposition machine (Selcos Cetus-S), a multi-layered low-emissivity coating (Double Loy) coated on a transparent glass substrate is formed as follows, and a functional building material for windows and doors having a green transmission color (low-emissivity coating substrate) was prepared. The layer structure of the functional building material for windows and doors (low-emission coating substrate) prepared above is shown in Table 1 according to the stacking order.

floor division ingredient thickness top dielectric layer upper floor SiAlNx 29.5 nm lower floor ZAO 7 nm light absorbing metal layer NiCr 0.2 nm 2nd low-emission layer Ag 18.5 nm light absorbing metal layer NiCr 0.2 nm 4th dielectric layer ZAO 7 nm titanium oxide layer TiOx 7.5 nm 3rd dielectric layer upper floor SiAlNx 61.2 nm lower floor ZAO 7.0 nm light absorbing metal layer NiCr 0.2 nm 1st low-emission layer Ag 9.0 nm light absorbing metal layer NiCr 0.2 nm 2nd dielectric layer upper floor ZAO 7.0 nm lower floor SiAlNx 6.6 nm chromium nitride layer CrNx 2.5 nm first dielectric layer SiAlNx 18.0 nm clear glass substrate glass 5mm

Example 2

A low-emissivity coated substrate prepared in the same manner as in Example 1 was prepared, and a separately prepared 5mm transparent glass (corresponding to the second transparent substrate) was interposed with a spacer so that the gap was 12mm, and a sealant was applied to the edge to attach the laminated glass. was produced. In the double-glazed glass, the low-emissivity coating of the low-emissivity coated substrate prepared in Example 1 was attached to the inside of the double-glazed glass so as to contact the gap. Gaps were filled with Ar 100% by volume. The double-glazed glass is installed so that the low-emission coating substrate is positioned on the outdoor side and the transparent glass (corresponding to the second transparent substrate) is positioned on the indoor side.

Comparative Example 1

A spacer was interposed between the 5 mm green glass and the 5 mm transparent glass so as to have a gap of 12 mm, and a sealant was applied to the edge and attached to prepare a double-glazed glass. Gaps were filled with Ar 100% by volume. The double-glazed glass is installed so that the green glass is located on the outdoor side and the transparent glass is located on the indoor side.

Comparative Example 2

Using a magnetron sputtering deposition machine (Selcos Cetus-S), a multi-layered low-emissivity coating (single-roy) coated on a transparent glass substrate was formed as follows to prepare a low-emissivity coated substrate. The layer structure of the prepared low-emissivity coated substrate is shown in Table 2 according to the stacking order.

floor division ingredient thickness Upper first dielectric layer SiAlNx 35 nm First titanium oxide layer TiOx 5 nm 2nd dielectric layer upper floor SiAlNx 3 nm lower floor ZAO 5 nm light absorbing metal layer NiCr 0.2 nm 1st low-emission layer Ag 17 nm light absorbing metal layer NiCr 0.2 nm 3rd dielectric layer upper floor ZAO 5 nm lower floor SiAlNx 3 nm Second titanium oxide layer TiOx 20 nm 4th dielectric layer SiAlNx 5 nm clear glass substrate glass 5 mm

The prepared low-emissivity coating substrate was interposed with a spacer to form a gap of 12 mm with a separately prepared 5 mm green glass, and a sealant was applied and attached to the edge to produce double-layer glass. In the double-glazed glass, the low-emissivity coating of the low-emissivity coating substrate was attached to the inside of the double-glazed glass so as to contact the gap. Gaps were filled with Ar 100% by volume. The double-glazed glass was installed so that the green glass was positioned on the outdoor side and the low-emission coating substrate was positioned on the indoor side.

evaluation

Experimental Example 1

Performance analysis was performed for each of the following items for the functional building material for windows and doors of the single-pane glass manufactured in Example 1 and the double-glazed glass manufactured in Example 2 using the same.

<Calculation of transmittance and reflectance>

After measuring the optical spectrum with a width of 1 nm in the range of 250 to 2500 nm using a UV-Vis-NIR spectrum measuring device (Shimadzu, Solidspec-3700), the resultant value was measured according to the KS L 2514 standard, and the visible light transmittance and window The reflectance of the coated surface of the low-emissivity coating of the functional building material for windows (low-emissivity coated substrate) and the reflectance of the other side on which the low-emissivity coating of the functional building material for windows is not formed, that is, the side of the glass substrate, were calculated.

<Emissivity>

The far-infrared reflectance spectrum of the side coated with the low-emission coating of the functional building material for windows was measured using a far-infrared spectroscopic measuring device, FT-IR (Frontier, Perkin Elmer), and from the results, the far-infrared ray was measured in accordance with the KS 2514 standard. After calculating the average reflectance, the emissivity was evaluated by the formula of 100%-(far-infrared ray average reflectance).

<color index>

L, a*, and b* values based on CIE1931 were measured using a color difference measuring instrument (KONICA MINOLTA SENSING, Inc., CM-700d). At this time, the light source was applied as D65 of the KS standard.

The results of Example 1 are shown in Table 3 below.

division Example 1 Emissivity, ε 3.0% Visible light transmittance (%) 60.3% division Transmission color of functional building materials for windows (low-emission coating substrate) Reflection color of non-coated surface of transparent glass substrate color index L 82.0 36.9 a* -6.4 -2.3 b* 3.7 -12.0

The results of Example 2 are shown in Table 4 below.

division Example 2 Visible light transmittance (%) 54.3% SHGC (g-value) 0.293 division double glazed
transmission color
(Indoor side color) Outdoor side reflection color of double glazing
(outside color) color index L 78.6 41.9 a* -7.1 -3.8 b* 3.6 -9.7

The functional building material for windows and doors (low-emission coating substrate) prepared in Example 1 and the double-glazed glass of Example 2 using the same exhibited a low emissivity of 3.0%, and when the double-glazed glass was manufactured, the SHGC value was 0.293, which was excellent shielding rate, It showed high transmittance, and it was confirmed that the transmittance color implemented green according to the color index value.

The results of Comparative Example 1 and Comparative Example 2 are shown in Tables 5 and 6 below.

division Comparative Example 1 Emissivity of transparent glass, ε 83.7% Visible light transmittance (%) 68.9% SHGC (g-value) 0.501 division double glazed
transmission color
(Indoor side color) Outdoor side reflection color of green glass (outside side color) color index L 86.5 40.9 a* -8.0 -5.2 b* 1.7 0.1

From the results of Table 5, in Comparative Example 1, a transmission color of green was implemented because green glass was used, but the emissivity was very high because the low-emissivity coating substrate was not used at all.

division Comparative Example 2 Emissivity of low-emissivity coated substrates, ε 3.4% Visible light transmittance (%) 56.1% SHGC (g-value) 0.346 division double glazed
transmission color
(Indoor side color) Outdoor side reflection color of green glass (outside side color) color index L 79.6 45.1 a* -9.9 -4.0 b* 5.2 -6.9

From the results of Table 6, Comparative Example 2 uses a low-emissivity coating substrate with low emissivity, and the shielding rate is improved compared to Comparative Example 1 (SHGC value is lowered), but green, which is preferred for residential use, such as color index value, is green. It is implemented by the color of the glass itself, the low-emissivity coating substrate is disposed on the indoor side with respect to the green glass, and the low-emissivity coating is formed as a single low-emissivity, so the emissivity is high and the shielding factor (SHGC) is high compared to Example 2. Inferior.

As described above, the present invention has been described with reference to the drawings illustrated, but the present invention is not limited by the embodiments and drawings disclosed in this specification, and various modifications are made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that variations can be made. In addition, although the operational effects according to the configuration of the present invention have not been explicitly described and described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be recognized.

10: (first) transparent substrate
15: second transparent substrate
11, 12: low-emission layer
21: chromium nitride layer
31: titanium oxide layer
41, 42, 51, 52: dielectric layer
61, 62, 63, 64: light absorbing metal layer
71: upper dielectric layer
90: low-emission coating
100, 200, 300, 400, 500, 600, 700: Functional building materials for windows and doors
101: low-emission coated substrate
800: double glazing

Claims (14)

A transparent substrate and a low-emission coating formed on one surface of the transparent substrate,
The low-emissivity coating may include at least two low-emissivity layers including a first low-emissivity layer and a second low-emissivity layer sequentially positioned on the transparent substrate; a chromium nitride layer disposed between the transparent substrate and the first low-emissivity layer and containing chromium nitride; And a titanium oxide layer disposed between the first low-emissivity layer and the second low-emissivity layer and including titanium oxide;
The low-emission coating is
a first dielectric layer laminated on a surface of the chromium nitride layer facing the transparent substrate; and a second dielectric layer stacked on a surface of the chromium nitride layer facing the first low-emissivity layer.
a third dielectric layer stacked on a surface of the titanium oxide layer facing the first low-emissivity layer; and
A fourth dielectric layer laminated on the surface of the titanium oxide layer facing the second low-emissivity layer; further comprising,
The first dielectric layer and the second dielectric layer each include silicon aluminum nitride,
The third dielectric layer and the fourth dielectric layer each include zinc aluminum oxide,
The second dielectric layer has a multilayer structure including a second dielectric lower layer including silicon aluminum nitride and a second dielectric upper layer including zinc aluminum oxide, and the second dielectric layer of the multilayer structure includes the second dielectric lower layer comprising the chromium nitride Laminated in a direction in contact with the layer,
The third dielectric layer has a multilayer structure including a third lower dielectric layer including aluminum zinc oxide and an upper third dielectric layer including silicon aluminum nitride, and the third dielectric layer of the multilayer structure includes the upper third dielectric layer comprising the titanium oxide. stacked in a direction in contact with the layer
Functional building materials for windows and doors.
According to claim 1,
The color index L* value measured using a color difference meter for the transmitted color is 75.0 to 85.0, the color index a* value is -4 to -10, and the color index b* value is 0 to 6
Functional building materials for windows and doors.
delete delete delete delete According to claim 1,
The low-emissivity coating further comprises a light-absorbing metal layer laminated on each upper surface and each lower surface of the first low-emissivity layer and the second low-emissivity layer.
Functional building materials for windows and doors.
According to claim 7,
The light absorbing metal layer includes one selected from the group consisting of Ni, Cr, alloys of Ni and Cr, and combinations thereof.
Functional building materials for windows and doors.
According to claim 1,
The low-emissivity coating further comprises an upper dielectric layer located on the outer side of the coating surface of the second low-emissivity layer.
Functional building materials for windows and doors.
According to claim 9,
The upper dielectric layer includes at least one selected from the group consisting of tin zinc oxide, zinc oxide, zinc aluminum oxide, tin oxide, bismuth oxide, silicon nitride, silicon aluminum nitride, silicon aluminum oxynitride, silicon tin nitride, and combinations thereof. doing
Functional building materials for windows and doors.
According to claim 9,
The upper dielectric layer includes a lower upper dielectric layer including aluminum zinc oxide and an upper upper dielectric layer including aluminum nitride, and a multilayer structure in which the lower dielectric layer and the upper dielectric layer are sequentially stacked from the transparent substrate.
Functional building materials for windows and doors.
a low-emissivity coated substrate including a first transparent substrate and a low-emissivity coating formed on one surface of the first transparent substrate; and
A second transparent substrate formed spaced apart from the low-emissivity coating; includes,
The low-emissivity coating may include at least two low-emissivity layers including a first low-emissivity layer and a second low-emissivity layer sequentially positioned from the first transparent substrate; a chromium nitride layer disposed between the first transparent substrate and the first low-emissivity layer and containing chromium nitride; And a titanium oxide layer disposed between the first low-emissivity layer and the second low-emissivity layer and including titanium oxide;
The low-emission coating is
a first dielectric layer laminated on a surface of the chromium nitride layer facing the transparent substrate; and a second dielectric layer stacked on a surface of the chromium nitride layer facing the first low-emissivity layer.
a third dielectric layer stacked on a surface of the titanium oxide layer facing the first low-emissivity layer; and
A fourth dielectric layer laminated on the surface of the titanium oxide layer facing the second low-emissivity layer; further comprising,
The first dielectric layer and the second dielectric layer each include silicon aluminum nitride,
The third dielectric layer and the fourth dielectric layer each include zinc aluminum oxide,
The second dielectric layer has a multilayer structure including a second dielectric lower layer including silicon aluminum nitride and a second dielectric upper layer including zinc aluminum oxide, and the second dielectric layer of the multilayer structure includes the second dielectric lower layer comprising the chromium nitride Laminated in a direction in contact with the layer,
The third dielectric layer has a multilayer structure including a third lower dielectric layer including aluminum zinc oxide and an upper third dielectric layer including silicon aluminum nitride, and the third dielectric layer of the multilayer structure includes the upper third dielectric layer comprising the titanium oxide. stacked in the direction in contact with the layer
double layer glass.
According to claim 12,
The emissivity of the low-emissivity coated substrate is 3.5% or less,
The visible light transmittance of the double-glazed glass is 50 to 60%,
When the low-emissivity coated substrate of the double-glazed glass is installed in a direction in which the low-emissivity coating substrate is located on the outdoor side and the second transparent substrate is located on the indoor side, the solar heat acquisition coefficient (SHGC) value according to Equation 1 below is 0.280 to 0.300
double layer glass.
[Calculation 1]
SHGC = (energy passed through double glazing and transmitted to the inside) / (energy incident on double glazing)
According to claim 13,
When the low-emissivity coated substrate of the double-glazed glass is installed in a direction in which the low-emissivity coated substrate is located on the outside and the second transparent substrate is located on the inside, the reflected color of the outdoor non-coated surface of the low-emissivity coated substrate is measured using a color difference meter. A color index L* value is 70.0 to 80.0, a color index a* value is -4 to -10, and a color index b* value is 0 to 6
double layer glass.

Images