KR20200062836A - Functional building material including low-emissivity coat for windows and insulated glazing - Google Patents

Abstract

Provided is a functional building material for windows and doors, which includes: a transparent substrate; and a low-emissivity coating formed on one surface of the transparent substrate. The low-emissivity coating includes: 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 positioned between the transparent substrate and the first low-emissivity layer, and including chromium nitride; and a titanium oxide layer positioned between the first low-emissivity layer and the second low-emissivity layer, and including titanium oxide.

Description

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 multilayer glass.

Low-emissivity glass (Low-Emissivity glass) refers to a glass in which a low-emission layer containing a metal having a high reflectivity in the infrared region such as silver (Ag) is deposited as a thin film. The low-emission glass is a functional material that reflects radiation in the infrared region to block solar radiation outdoors in the summer and to preserve indoor heating radiation in the winter, thereby saving energy in buildings.

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

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

It is also an object of the present invention to provide a multi-layer 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 can be understood by the following description, and will be more clearly understood by embodiments of the present invention. In addition, it will be readily appreciated that the objects and advantages of the present invention can be realized by means of the appended claims and combinations thereof.

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, to provide a multi-layer glass using the functional building material for windows and doors.

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

In addition, the multi-layer glass according to the present invention does not include green glass, and has a structure of coating a low-emission coating on a transparent substrate, thereby realizing high insulation, high shielding performance, and green color.

In addition to the above-described effects, the concrete effects of the present invention will be described together while describing the specific matters for carrying out the invention.

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

The above-described objects, features, and advantages will be described in detail below with reference to the accompanying drawings, and accordingly, a person skilled in the art to which the present invention pertains can easily implement the technical spirit of the present invention. In the description of the present invention, when it is determined that detailed descriptions of known technologies related to the present invention may unnecessarily obscure the subject matter of the present invention, detailed descriptions will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings are used to indicate the same or similar components.

In the following, the arrangement of any component in the "upper (or lower)" or "upper (or lower)" of the component means that the arbitrary component is disposed in contact with the upper surface (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.

Also, when a component is described as being "connected", "coupled" or "connected" to another component, the components may be directly connected to or connected to each other, but other components may be "interposed" between each component. It should be understood that "or, each component may be "connected", "coupled" or "connected" through other components.

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

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

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

Conventional low-emission glass cannot be implemented with the green color of the low-emission glass because the transmission color of the low-emission glass cannot realize the green-based color without deteriorating the emissivity, high insulation performance and high shielding performance required for the low-emission glass. A multilayer glass was prepared. That is, one side of the multilayer glass is green glass, and the other side is composed of low-emission glass. Green glass is a glass made of green by adjusting the components of the glass itself.

The functional building material for windows and doors does not need to use green glass because it imparts a green color by a low-emission coating without lowering the emissivity, high heat insulation performance, and high shielding performance required for low-emission glass, Green can be implemented by applying to a transparent substrate such as transparent glass.

The functional building material for windows and doors is easily applied to various structures of a single-plate structure and a multi-layer structure by realizing a green color while maintaining excellent functionality of a conventional low-emission coated low-emission glass.

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

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

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

The low-emission coating 90 is formed of a multi-layered laminate as described above, and is applied as a coating film of the transparent substrate 10, for example, it may be used as 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 minimizes the movement of heat between indoors and outdoors by reflecting solar radiant heat outdoors in summer and preserving radiant heat indoors in winter, thereby saving energy in buildings.

The low-emission layers 11 and 12 mean layers having low infrared emissivity. Emissivity refers to the rate at which an object absorbs, transmits, and reflects energy having any particular 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 to applied infrared energy when far infrared rays corresponding to a wavelength region of about 5 μm to about 50 μm exhibiting strong thermal action are applied.

According to Kirchhoff's law, the infrared energy absorbed by an object is the same as the infrared energy emitted by the object again, so the absorption 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 for the infrared energy of the object, the lower the emissivity. Expressed numerically, there is a relationship of (emissivity = 1-infrared reflectance).

Such emissivity can be measured by various methods commonly known in the art, and can be measured by equipment such as a Fourier transform infrared spectroscopy (FT-IR) according to the KSL2514 standard.

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

The functional building material for windows and doors 100 is a energy-saving functional building material that can provide excellent insulation by lowering the emissivity in the infrared region while maintaining a predetermined transmission characteristic in the visible light region to realize excellent light-resistance. to be. These functional building materials for windows and doors are also called'Roy Glass'.

The low-emissivity layers 11 and 12 are layers formed of an electrically conductive material that can have a low emissivity, for example, a metal, that is, have a low sheet resistance and thus have a low emissivity. For example, the low-emissivity layers 11 and 12 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 emissivity range may simultaneously control visible light transmittance and infrared emissivity to simultaneously realize excellent light and heat insulation effects. The low-emissivity layers 11 and 12 having the above emissivity may have, for example, a sheet resistance of a material composed of a thin film of about 0.78 Ω/sq to about 6.42 Ω/sq, but is not limited thereto.

The low-emissivity layers 11 and 12 perform a function of selectively transmitting and reflecting solar radiation, and specifically, have a low emissivity due to high reflectance of radiation in the infrared region. 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, and are not limited thereto. Metals known to be capable of realizing performance can 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-emission layer (11, 12) may be a layer formed of silver (Ag), the low-emission coating (90) containing it, high electrical conductivity, low absorption in the visible light region, durability, etc. You can implement

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

Since the low-emissivity coating 90 has the double-lower structure, the low-emission layers 11 and 12 include a plurality of layers of two or more layers of the first low-emission layer 11 and the second low-emission layer 12. The emissivity can be further lowered, and the lowered emissivity improves the insulation performance, and can be adjusted with a green color.

When a low-emission glass that implements a green color by using the existing green glass as a double layer is applied with a double Roy containing two low-emission layers of the low-emission coating, the color of the low-emission glass is green and green. Combined together, the resulting color deviates from green. Therefore, the low-emission glass forming the multi-layer glass together with the green glass had to include only one layer of the low-emission layer of the low-emission coating.

On the contrary, since the functional building material for windows and doors is not used together with green glass, a double Roy structure including two low emission layers must be applied to realize green, and as a result, the advantages of the Double Roy structure, That is, it is possible to further have the advantage of further lowering the emissivity and improving the thermal insulation performance.

The color of the chromium nitride layer 21 is adjusted, durability is improved, and the titanium oxide layer 31 acts so that the transmittance does not decrease. Accordingly, the functional building material for windows and doors 100 is the chromium nitride layer in the order of the chromium nitride layer 21, the first low emission layer 11, the titanium oxide layer 31 and the second low emission layer 12. By including (21) and the titanium oxide layer (31), while maintaining a certain level of transmittance is not lowered overall, at the same time, the transmission color can be implemented as a green (green) color.

The chromium nitride layer 21 is a layer formed of chromium nitride (CrNx, x being 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, specifically, about 2 nm to about 3 nm. The chromium nitride layer 21 has a thickness in the above range, effectively improving the durability of the low-emission coating 90, and color control becomes possible, so that it can be easily designed as a green color.

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

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

The thickness of the titanium oxide layer 31 may be about 3 nm to about 15 nm, specifically, about 5 nm to about 12 nm. Since the titanium oxide layer 31 has a thickness in the above range, the transmittance of the low-emission coating 90 can be effectively improved, and color control becomes possible, so that the transmission color can be easily designed in a green color.

In one embodiment, the color index L* value measured using a color difference meter with respect to the transmitted color of the functional building material 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 about 0 to about 6. The color index value in the numerical range indicates that a green-based color preferred for residential use is implemented.

The color index values are L, a*, and b* values measured based on CIE1931 using a D65 of KS standard and a color difference meter (KONICA MINOLTA SENSING, InC., CM-700d).

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

In one embodiment of the present invention, the low-emission coating comprises a first dielectric layer 41 stacked on the 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-emission layer 11.

In Fig. 2, a cross section of the functional building material 200 for the window 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, but are not limited thereto. Hereinafter, in other drawings of the present specification, each layer may be illustrated to be disposed in contact for convenience of description and understanding, but is not limited to a configuration arranged in contact unless otherwise stated.

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

In FIG. 3, a cross section of the functional building material 200 for the window 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, but are not limited thereto. Hereinafter, in other drawings of the present specification, each layer may be illustrated to be disposed in contact for convenience of description and understanding, but is not limited to a configuration arranged in contact unless otherwise stated.

The first dielectric layer 41, the second dielectric layer 42, the third dielectric layer 51 and the fourth dielectric layer 52 are tin oxide, zinc oxide, zinc oxide aluminum, tin oxide, bismuth oxide, nitride And silicon, silicon aluminum nitride, aluminum oxynitride, silicon nitride tin, and combinations thereof.

Each of the dielectric layers 41, 42, 51, and 52 may be a single-layered structure or a multi-layered structure in which a plurality of layers are continuously stacked, depending on the desired color expression or physical properties to be implemented, depending on a specific use. .

The dielectric layers 41, 42, 51, and 52 can function as an antioxidant layer for the low-emission layers 11 and 12 because the metal used as the low-emission layers 11 and 12 is generally oxidized well. The dielectric layers 41, 42, 51, and 52 also serve to increase the visible light transmittance. In addition, the optical performance of the low-emission coating 90 can be controlled by appropriately adjusting the material, physical properties, and number of layers of the dielectric layers 41, 42, 51, and 52. By properly adjusting the material and properties of the dielectric layers 41, 42, 51, 52, the number of layers, and the thickness of each, the functional building material for windows and doors maintains a certain level of transmittance, while exhibiting high insulation and high shielding performance. In addition, the transmitted color can help to realize a green color useful 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 in a single layer or multiple layers, respectively.

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

In FIG. 4, the second dielectric layer 42 is a multi-layer structure including a second dielectric lower layer 4201 including silicon aluminum nitride and a second dielectric upper layer 4202 including zinc oxide, and the multilayer structure. The second dielectric layer 42 is stacked in a direction in which the second dielectric lower layer 4201 is in contact with the chromium nitride layer 21.

In FIG. 4, the third dielectric layer 51 is a multi-layer structure including a third dielectric lower layer 5101 including zinc aluminum oxide and a third dielectric upper layer 5102 including silicon aluminum nitride, and the multilayer structure In the third dielectric layer 51, the third dielectric upper layer 5102 is stacked in a direction in contact with the titanium oxide layer 31.

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

The low-emissivity coating 90 may further include light-absorbing metal layers 61, 62, 63, and 64, wherein the first low-emission layer 11 and the second low-emission layer 12 are located at upper and lower portions, respectively. have.

The light absorbing metal layer (61, 62, 63, 64) is made of a metal having excellent light absorbing function and functions to control sunlight, and is implemented by the low-emission coating (90) by controlling its material, thickness, etc. Color can be adjusted.

Specifically, the light absorbing metal layers 61, 62, 63, and 64 may have an extinction coefficient in a visible light region of about 1.5 to about 3.5. The extinction coefficient is a value derived from an optical constant, which is an intrinsic property of the material of the material, and the optical constant is expressed by n-ik as a formula. 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 the wavelength (λ), and in the case of metal, the extinction coefficient is generally greater than zero. The extinction coefficient, k is the absorption coefficient, α and α=(4πk)/λ, and the absorption coefficient, α is the relationship of I=I0exp(-αd) when the thickness of the medium through which light passes is d. Due to absorption of light by the medium, the intensity (I) of light passing through is reduced compared to the intensity (I0) of incident light.

The light absorbing metal layers 61, 62, 63, and 64 use a metal having an extinction coefficient of the visible light region in the above range to absorb a portion of the visible light, so that the low-emission coating 90 gives a predetermined color. To 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, an alloy of Ni and Cr, and combinations thereof, but are 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 located on one or both surfaces of the low-emission layers 11 and 12. 5 shows a case where the light absorbing metal layers 61, 62, 63, and 64 are formed of a plurality of layers on both surfaces of the low-emission layers 11, 12.

The thickness of the light absorbing metal layers 61, 62, 63, and 64 may be, for example, about 0.5 nm to about 10 nm, and specifically, about 0.5 nm to about 5 nm, but is not limited thereto. , It can be changed according to the purpose. The light-absorbing metal layers 61, 62, 63, and 64 are formed within the thickness range, thereby serving as the light-absorbing metal layers 61, 62, 63, and 64, and are suitable to be adjusted to have a predetermined transmittance and reflectance.

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 an upper side of the second low-emission layer 12 facing the outside of the coating surface.

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

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

The upper dielectric layer 71 may be a single-layer structure or a multi-layer structure in which a plurality of layers are continuously stacked, in accordance with a specific use, in accordance with a desired color expression or physical properties to be implemented.

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

In one embodiment of the present invention, the upper dielectric layer 71 includes an upper dielectric lower layer 7101 including zinc oxide and an upper dielectric upper layer 7102 including 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 multilayer structure in a direction toward the outer side of the coating surface.

The low-emission coating 90 may further include an additional layer other than the above-described structure in order to implement a predetermined optical performance.

The transparent substrate 10 may be a transparent substrate having a high visible light transmittance, for example, a glass having a visible light transmittance of about 80% to about 100% (colorless transparent glass) or a transparent plastic substrate. The transparent substrate 10, for example, the glass used for construction may be used without limitation, for example, may be a thickness of about 2mm to about 12mm, 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-emissivity coating 90 may be sequentially formed. Each layer of the low-emission coating 90 may be formed in a suitable way to implement desired physical properties according to a known method.

For example, low-emission layers 11, 12, chromium nitride layer 21, titanium oxide layer 31, dielectric layers 41, 42, 51, 52, light-absorbing metal layers 61, 62, 63, 64 , Each layer such as the upper dielectric layer 71 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 the outside and the surface of the low-emission coating 90 faces the inside. .

Alternatively, the functional building materials for windows and doors (100, 200, 300, 400, 500, 600, 700) are installed such that the surface of the transparent substrate 10 faces the outside and the surface of the low-emission coating 90 faces the inside. , An inner space is formed with an additional transparent substrate spaced apart from the surface of the low-emissivity coating 90 at regular intervals, so-called double-layer glass.

In one embodiment of the invention:

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

It includes; a second transparent substrate formed spaced apart from the low-emission coating,

The low-emission coating may include at least two low-emission layers including a first low-emission layer and a second low-emission layer sequentially positioned as the first transparent substrate; A chromium nitride layer positioned between the first transparent substrate and the first low emission layer and including chromium nitride; And a titanium oxide layer positioned between the first low emission layer and the second low emission layer and including titanium oxide.

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

In FIG. 8, the low-emissivity coating substrate 101 includes a first transparent substrate 10 and a low-emission coating 90. The low-emission coating substrate 101 constitutes the multi-layer glass 800 together with the second low-emissivity coating 90 and the second transparent substrate 15 formed at a predetermined distance. The low-emission coating substrate 101 and the second transparent substrate 15 are spaced apart at predetermined intervals to form a hollow layer A therebetween.

The hollow layer (A) may be sealed so that the low-emission 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 for windows and doors (100, 200, 300, 400, 500, 600, 700). 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.

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

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

In the multi-layer glass 800, as described above, the low-emission coating substrate 101 can lower the emissivity and realize high insulation performance, specifically, the low-emission coating substrate 101 is about 3.5% or less , More specifically, it may implement an emissivity of about 1% to about 3%.

In addition, in the multi-layer glass 800, as the transmission color of the low-emission coating substrate 101 can realize a green-based color, the low-emission coating substrate 101 is disposed on the outdoor side while the low-emission coating substrate 101 is disposed. The coating 90 may be arranged to face the hollow layer (A). The multilayer glass 800 may realize high shielding performance due to the arrangement of the low-emission coating 90. This is an improvement in that there has been a limitation in improving the shielding performance due to the placement of the low-emission coating in the existing commercial products in which the green glass is disposed on the outdoor side and the low-emission glass is placed on the indoor side.

As described above, the multilayer glass 800 realizes high shielding performance by lowering SHGC (solar heat acquisition coefficient, g-value) by using the low-emission coating substrate 101 embodying the above-described green-based color. . For example, the multi-layer glass 800 may have a specific SHGC of about 0.280 to about 0.300.

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

[Calculation formula 1]

SHGC = (energy passing through the double-layer glass and transmitted inside) / (energy entering the double-layer glass)

The SHGC (Solar Heat Acquisition Coefficient) can be obtained by using the Window 7.4 program to calculate the optical spectrum and use the emissivity results.

After measuring the optical spectrum, the transmittance can be calculated based on the KS L 2514 standard.

The emissivity can be calculated by measuring the far-infrared reflectance spectrum, calculating the average far-infrared reflectance according to the KS 2514 standard, and then calculating the formula as 100%-(far-infrared average reflectance).

The low-emission coating substrate 101 of the multi-layer glass 800 is installed on the outdoor side, and the second transparent substrate 15 is located in a direction that is located inside, and the low-emission coating 90 has a hollow layer (A When installed to face ), the color index L* value measured using a color difference meter with respect to the transmitted color of the multilayer 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 about 0 to about 6. The color index value of the transmitted color of the multilayer glass 800 indicates that a green color is implemented. The transmission color of the multilayer glass 800 is the same even when measured on both the indoor and outdoor sides.

Hereinafter, examples and comparative examples of the present invention will be described. The following examples are only examples of the present invention, and the present invention is not limited to the examples below.

(Example)

Example 1

Using a magnetron sputtering evaporator (Selcos Cetus-S), to form a multi-layered low-emission coating (double Roy) coated on a transparent glass substrate as follows, a functional building material for windows with green transmission color (low-emission coating) Substrate). The layer structure of the prepared functional building material for windows and doors (low-emission coated substrate) is shown in Table 1 according to the lamination order.

Floor division material thickness Upper dielectric layer Upper floor SiAlNx 29.5 nm Lower layer 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 Third dielectric layer Upper floor SiAlNx 61.2 nm Lower layer 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 Second dielectric layer Upper floor ZAO 7.0 nm Lower layer SiAlNx 6.6 nm Chromium nitride layer CrNx 2.5 nm First dielectric layer SiAlNx 18.0 nm Transparent glass substrate Glass 5 mm

Example 2

A low-emission coated substrate prepared in the same manner as in Example 1 was prepared, and a 5 mm transparent glass (corresponding to a second transparent substrate) prepared separately and a spacer interposed to have a gap of 12 mm, and coated with a sealant on the edge to attach the multilayer glass Was produced. The low-emission coating of the low-emission coating substrate prepared in Example 1 in the multilayer glass was attached to be positioned inside the multilayer glass to contact the gap. The gap was filled with 100% by volume of Ar. The multilayer glass was installed such that a low-emission coating substrate was located on the outdoor side and the transparent glass (corresponding to a second transparent substrate) was located on the indoor side.

Comparative Example 1

A double-layered glass was produced by interposing a spacer to a gap of 12 mm between the 5 mm green glass and the 5 mm transparent glass, and applying a sealant to the edges. The gap was filled with 100% by volume of Ar. The multilayer glass was installed such that the green glass was located on the outdoor side and the transparent glass was located on the indoor side.

Comparative Example 2

Using a magnetron sputtering evaporator (Selcos Cetus-S), to form a low-emission coating (single-loy) of a multi-layer structure coated on a transparent glass substrate as follows, to prepare a low-emission coating substrate. Table 2 shows the layer structure of the prepared low-emissivity coating substrate according to the lamination order.

Floor division material thickness Upper first dielectric layer SiAlNx 35 nm First titanium oxide layer TiOx 5 nm Second dielectric layer Upper floor SiAlNx 3 nm Lower layer 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 Third dielectric layer Upper floor ZAO 5 nm Lower layer SiAlNx 3 nm Titanium oxide layer TiOx 20 nm 4th dielectric layer SiAlNx 5 nm Transparent glass substrate Glass 5 mm

The prepared low-emission coating substrate was prepared with a spacer interposed so as to have a 5 mm green glass and a gap of 12 mm separately prepared, and a sealant was applied to the edges to prepare a multilayer glass. The low-emissivity coating of the low-emissivity coating substrate in the multilayer glass was attached to be located inside the multi-layer glass so as to contact the gap. The gap was filled with 100% by volume of Ar. The multilayer glass was installed such that the green glass was located on the outdoor side and the low-emission coating substrate was located on the indoor side.

evaluation

Experimental Example 1

The performance analysis of the functional building materials for windows and doors of the single-pane glass produced in Example 1 and the multilayer glass produced in Example 2 using the same was performed by the following items.

<Calculation of transmittance and reflectance>

After measuring the optical spectrum with a width of 1 nm section in the range of 250 to 2500 nm using a UV-Vis-NIR spectrum measurement device (Shimadzu, Solidspec-3700), the resultant value is based on KS L 2514 standards, and the visible light transmittance and window The reflectance of the coating surface of the low-emissivity coating of the functional building material for the use (low-emission coating substrate), and the reflectance of the other side of the low-emission coating of the functional building material for windows and doors, that is, the surface of the glass substrate side were calculated.

<Emissivity>

FT-IR (Frontier, Perkin Elmer), a far-infrared spectral measurement device, was used to measure the far-infrared reflectance spectrum of one side coated with a low-emission coating of a functional building material for windows and doors. After calculating the average reflectance, the emissivity was evaluated by the formula of 100%-(far infrared average reflectance).

<Color Index>

The L, a*, and b* values of the CIE1931 standard were measured using a color difference meter (KONICA MINOLTA SENSING, InC., CM-700d). At this time, the light source was applied to D65 of KS standard.

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

division Example 1 Emissivity, ε 3.0% Visible light transmittance (%) 60.3% division Transmissive color of functional building materials for windows and doors (low-emission coated substrates) Reflection color of uncoated 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 listed in Table 4 below.

division Example 2 Visible light transmittance (%) 54.3% SHGC (g-value) 0.293 division Double-layer glass
Transmission color
(Indoor color) Reflective color on the outdoor side of multilayer glass
(Outdoor 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 coated substrate) produced in Example 1 and the multilayer glass of Example 2 using the same exhibit a low emissivity of 3.0%, and SHGC value of 0.293 is excellent shielding rate when manufacturing multilayer glass, It shows a high transmittance, and it was confirmed that the transmittance color realized green by 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-layer glass
Transmission color
(Indoor color) Green glass's outdoor reflection color (outdoor color) Color index L 86.5 40.9 a* -8.0 -5.2 b* 1.7 0.1

In the results of Table 5, the green color of the transparent color was realized because Comparative Example 1 used green glass, but the emissivity was very high because no low-emission coating substrate was used.

division Comparative Example 2 Emissivity of low-emission coating substrate, ε 3.4% Visible light transmittance (%) 56.1% SHGC (g-value) 0.346 division Double-layer glass
Transmission color
(Indoor color) Green glass's outdoor reflection color (outdoor color) Color index L 79.6 45.1 a* -9.9 -4.0 b* 5.2 -6.9

In the results of Table 6, although the shielding rate is improved compared to Comparative Example 1 using a low-emissivity coated substrate having a low emissivity (the SHGC value is lowered), green, which is preferred for residential purposes, such as a color index value, is green. The emissivity is high compared to Example 2, and the shielding rate (SHGC) is achieved by implementing the self-color of the glass, the low-emission coating substrate is disposed on the indoor side with respect to the green glass, and the low-emission coating is formed of a single Roy. Inferior

As described above, the present invention has been described with reference to the exemplified drawings, but the present invention is not limited by the examples and drawings disclosed in the present specification, and can be varied by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that modifications can be made. In addition, although the operation and effect according to the configuration of the present invention has not been explicitly described while explaining the embodiment of the present invention, it is natural that the effect predictable by the 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 coating substrate
800: double-layer glass

Claims (14)

A transparent substrate and a low-emission coating formed on one surface of the transparent substrate,
The low-emission coating may include at least two low-emission layers including a first low-emission layer and a second low-emission layer sequentially positioned on the transparent substrate; A chromium nitride layer positioned between the transparent substrate and the first low emission layer and including chromium nitride; And a titanium oxide layer positioned between the first low emission layer and the second low emission layer and including titanium oxide.
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.
The low-emissivity coating of claim 1, wherein:
A first dielectric layer stacked 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 emission layer.
A third dielectric layer stacked on a surface of the titanium oxide layer facing the first low emission layer; And
Further comprising; a fourth dielectric layer stacked on the surface of the titanium oxide layer facing the second low-emission layer;
Functional building materials for windows and doors.
According to claim 3,
The first dielectric layer, the second dielectric layer, the third dielectric layer, and the fourth dielectric layer are tin oxide, zinc oxide, aluminum zinc oxide, tin oxide, bismuth oxide, silicon nitride, silicon nitride aluminum, and silicon oxynitride aluminum, respectively. A silicon nitride tin and at least one selected from the group comprising combinations thereof
Functional building materials for windows and doors.
According to claim 3,
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.
Functional building materials for windows and doors.
The method of claim 5,
The second dielectric layer is a multi-layered structure including a second dielectric lower layer comprising silicon aluminum nitride and a second dielectric upper layer comprising zinc oxide, and the second dielectric layer of the multilayer structure has the second dielectric lower layer having the chromium nitride layer. Stacked in a direction in contact with the layer,
The third dielectric layer is a multi-layer structure including a third dielectric lower layer including zinc oxide and a third dielectric upper layer including silicon aluminum nitride, and the third dielectric layer of the multilayer structure has the third dielectric upper layer having the titanium oxide. Stacked in the direction of contact with the layer
Functional building materials for windows and doors.
According to claim 1,
The low-emission coating further includes a light-absorbing metal layer stacked on each of the upper and lower surfaces of the first low-emission layer and the second low-emission layer.
Functional building materials for windows and doors.
The method of claim 7,
The light absorbing metal layer includes one selected from the group consisting of Ni, Cr, an alloy of Ni and Cr, and combinations thereof.
Functional building materials for windows and doors.
According to claim 1,
The low-emission coating further includes an upper dielectric layer located on the outer side of the coating surface of the second low-emission layer.
Functional building materials for windows and doors.
The method of claim 9,
The upper dielectric layer includes at least one selected from the group consisting of zinc oxide, zinc oxide, zinc oxide, tin oxide, bismuth, silicon nitride, silicon nitride aluminum, silicon oxynitride, silicon nitride tin, and combinations thereof. doing
Functional building materials for windows and doors.
The method of claim 9,
The upper dielectric layer includes an upper dielectric lower layer including zinc oxide and an upper dielectric upper layer including silicon aluminum nitride, and is a multilayer structure in which the upper dielectric lower layer and the upper dielectric upper layer are sequentially stacked from the transparent substrate.
Functional building materials for windows and doors.
A low-emissivity coating substrate including a first transparent substrate and a low-emissivity coating formed on one surface of the first transparent substrate; And
It includes; a second transparent substrate formed spaced apart from the low-emission coating,
The low-emission coating may include at least two low-emission layers including a first low-emission layer and a second low-emission layer sequentially positioned from the first transparent substrate; A chromium nitride layer positioned between the first transparent substrate and the first low emission layer and including chromium nitride; And a titanium oxide layer positioned between the first low emission layer and the second low emission layer and including titanium oxide.
Double-layer glass.
The method of claim 12,
The emissivity of the low-emission coating substrate is 3.5% or less,
The visible light transmittance of the multilayer glass is 50 to 60%,
When the low-emission coating substrate of the multilayer glass is installed in a direction in which the second transparent substrate is located on the outdoor side, the solar heat acquisition coefficient (SHGC) value according to the following Equation 1 is 0.280 to 0.300.
Double-layer glass.
[Calculation formula 1]
SHGC = (energy passing through the double-layer glass and transmitted inside) / (energy entering the double-layer glass)
The method of claim 13,
When installed in a direction in which the low-emissivity coating substrate of the multilayer glass is located on the outside and the second transparent substrate is located inside, the reflection color of the outdoor non-coating surface of the low-emission coating substrate is measured using a color difference meter. One color index L* value is 70.0 to 80.0, the color index a* value is -4 to -10, and the color index b* value is 0 to 6
Double-layer glass.

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