KR102433169B1 - Functional building material including low-emissivity coat for windows and insulated glazing - Google Patents

Abstract

A glass substrate and a low-emissivity coating formed on one surface of the glass substrate, wherein the low-emission coating is at least two layers of low-emissivity comprising a first low-emissivity layer and a second low-emission layer sequentially positioned on the glass substrate floor; And located between the first low-emissivity layer and the second low-emissivity layer, there is provided a functional building material for windows and doors comprising a titanium oxide layer comprising titanium oxide.

Description

Functional building materials for windows and double-glazed glass

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

Low-emissivity glass refers to a glass in which a low-emissivity layer including a metal having high reflectivity in the infrared region, such as silver (Ag), is deposited as a thin film. This low-emission glass is a functional material that reflects radiation in the infrared region to block outdoor solar radiation in summer and preserves indoor heating radiation in winter to save energy in buildings.

Since silver (Ag), which is generally used as a low-emission layer, is oxidized when exposed to air, a dielectric layer is deposited as an anti-oxidation film on the top and bottom of the low-emission layer. Such a 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 that realizes high insulation, high shielding performance, and a bright blue color.

It is also an object of the present invention to provide a multilayer glass using the functional building material for windows and doors.

The objects of the present invention are not limited to the objects mentioned above, and other objects and advantages of the present invention not mentioned may 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 the means and combinations thereof indicated in the appended claims.

In one embodiment of the present invention, it comprises a glass substrate and a low-emissivity coating formed on one surface of the glass substrate, wherein the low-emission coating is a first low-emissivity layer and a second low-emissivity layer sequentially positioned on the glass substrate. at least two low-emission layers comprising; And located between the first low-emissivity layer and the second low-emissivity layer, it provides a functional building material for windows and doors comprising a titanium oxide layer comprising titanium oxide.

In addition, in one embodiment of the present invention, a low-emission glass comprising a first glass substrate and a low-emission coating formed on one surface of the first glass substrate; and a second glass substrate formed spaced apart from the low-emissivity coating, wherein the low-emission coating is at least two layers including a first low-emissivity layer and a second low-emission layer sequentially positioned on the first glass substrate. of the low-emissivity layer; And located between the first low-emissivity layer and the second low-emissivity layer, it provides a multilayer glass comprising a titanium oxide layer comprising titanium oxide.

The functional building material for windows and doors according to the present invention can implement high thermal insulation, high shielding performance, and bright blue color.

In addition, the multilayer glass according to the present invention can implement high heat insulation, high shielding performance, and a bright blue color.

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

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 an embodiment of the present invention.
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.
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 below in detail with reference to the accompanying drawings, and accordingly, those skilled in the art to which the present invention pertains will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the gist 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.

In the following, that an arbitrary component is disposed on the "upper (or lower)" of a component or "top (or below)" of a component means that any component is disposed in contact with the upper surface (or lower surface) of the component. Furthermore, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.

Also, when it is described that a component is “connected”, “coupled” or “connected” to another component, the components may be directly connected or connected to each other, but other components are “interposed” between each component. It is to be understood that “or, each component may be “connected”, “coupled” or “connected” through another component.

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, there is provided a functional building material for windows and doors comprising a glass substrate and a low-emissivity coating formed on one surface of the glass 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 glass substrate; and a titanium oxide layer positioned between the first low-emissivity layer and the second low-emissivity layer, and including titanium oxide.

The functional building material for windows and doors includes at least two low-emissivity layers to improve (lower) the emissivity to achieve high thermal insulation performance, while at the same time maintaining a certain level of transmittance and increasing the shielding rate, the reflection color of the glass substrate surface can be implemented as a commercially preferred light blue color.

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 , a functional building material 100 for windows and doors includes a low-emission coating 90 on an organic substrate 10 , and in the low-emission coating 90 , a first low-emission layer 11 , titanium oxide The layer 21 and the second low-emissivity 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. Insulation performance can be exhibited by the low-e (low emissivity) effect due to the low emissivity characteristic.

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

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 any specific wavelength. The infrared emissivity indicates the degree of absorption of infrared energy in the infrared wavelength region. The infrared emissivity specifically refers to a ratio of absorbed infrared energy to the applied infrared energy when far infrared rays corresponding to a wavelength region of about 5 μm to about 50 μm exhibiting a strong thermal action are applied.

According to Kirchhoff's law, since the infrared energy absorbed by an object is equal to the infrared energy radiated back by the object, the absorption rate and the emissivity of the object are the same.

In addition, since unabsorbed infrared energy is reflected from the surface of the object, the higher the reflectance of the object with respect to the infrared energy, the lower the emissivity. Expressing this numerically, it has a relationship of (emissivity = 1 - infrared reflectance).

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

Absorption, ie, emissivity, of any object, for example, far-infrared radiation exhibiting such a strong thermal action, such as low-emissivity glass, may represent a very important meaning in measuring thermal insulation performance.

The functional building material for windows and doors 100 is an energy-saving functional building material for windows and doors that can provide excellent thermal insulation effect by lowering the emissivity in the infrared region while maintaining a predetermined transmittance characteristic in the visible light region to implement excellent lighting properties. to be. This functional building material for windows and doors is also called 'low-e glass'.

The low-emissivity layers 11 and 12 are layers formed of an electrically conductive material that may 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, 12 and 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 about 0.01 to about 0.03.

The low-emissivity layers 11 and 12 in the emissivity range can achieve excellent light-capturing and heat-insulating 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 a material composed of a thin film of, for example, 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 high reflectance with respect to radiation in the infrared region and thus have a low emissivity. The low-emissivity 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 is not limited thereto, and low-emission layers are not limited thereto. A 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 a layer formed of silver (Ag), and the low-emission coating 90 including the same has high electrical conductivity, low absorption in the visible light region, durability, etc. can be implemented.

The thickness (for each of the plurality of layers) of the low-emissivity layers 11 and 12 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 in the above range is suitable for simultaneously implementing low infrared emissivity and high visible light transmittance.

The low-emissivity coating 90 can further lower the emissivity because the low-emissivity layers 11 and 12 include a plurality of layers of two or more layers of the first low-emissivity layer 11 and the second low-emissivity layer 12 . and the lowered emissivity improves thermal insulation performance.

In general, if the thickness of the low-emissivity layer is increased to lower the emissivity of the low-emissivity coating, the transmittance is lowered, and a commercially less favorable color of deep blue tends to be expressed.

The functional building material 100 for windows and doors includes the titanium oxide layer 21 so that a certain level of transmittance is not lowered, and at the same time, the glass substrate 10 side (the low-emissivity coating 90 is coated side). The reflection color of the other side) can be implemented as a light blue color.

In one embodiment of the present invention, the thickness ratio of the second low-emissivity layer 12 and the first low-emissivity layer 11 may be about 1:1 to 0.9.

By adjusting the relative thickness ratio of the first low-emissivity layer 11 and the second low-emissivity layer 12 to the above-described range, it is possible to more effectively control the reflection color of the surface of the glass substrate 10, and within the range A commercially preferred bright blue color may be implemented.

For example, the first low-emission layer 11 may be about 4.5 nm to about 18 nm, and the second low-emissivity layer 12 may be about 5 nm to about 20 nm.

The functional building material 100 for windows and doors includes at least two low-emissivity layers 11 and 12, a titanium oxide layer 21 is interposed therebetween, and two low-emission layers 11 and 12. By adjusting the thickness ratio of the liver to the above range, the emissivity is lowered to achieve high insulation performance, the shielding rate is increased while maintaining a certain level of transmittance, and the reflection color of the glass substrate surface is realized as a commercially preferred light blue color. can

The titanium oxide layer 21 is a layer formed mainly of titanium oxide (TiOx).

The titanium oxide layer 21 exists between the two low-emission layers 11 and 12 to maintain a predetermined transmittance and improve durability.

The thickness of the titanium oxide layer 21 may be about 3 nm to about 15 nm, specifically, about 5 nm to about 12 nm. By having the titanium oxide layer 21 having a thickness in the above range, the transmittance of the low-emissivity coating 90 is effectively improved, durability is improved, and color control is possible, so that it can be easily designed in a light blue series. .

In one embodiment of the present invention, the low-emission coating is a first dielectric layer 31 positioned between the titanium oxide layer 21 and the first low-emission layer 11; and a second dielectric layer 32 positioned between the titanium oxide layer 21 and the second low emission layer 12 .

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 31 , the titanium oxide layer 21 , and the second dielectric layer 32 are illustrated to be in contact with each other, but the present invention is not limited thereto. Hereinafter, in other drawings of the present specification, each layer may be illustrated to be disposed in contact with each other for convenience of explanation and understanding, but unless otherwise stated, it is not limited to a configuration disposed in contact with each other.

The first dielectric layer and the second dielectric layer include zinc tin oxide, zinc oxide, zinc aluminum oxide, tin oxide, bismuth oxide, silicon nitride, silicon aluminum nitride, silicon aluminum oxynitride, silicon tin nitride, and combinations thereof. It may include at least one selected from.

Each of the dielectric layers 31 and 32 may have a single-layer structure or a multi-layer structure in which a plurality of layers are continuously stacked according to desired color expression or material properties to be implemented according to a predetermined use.

The dielectric layers 31 and 32 can act as an anti-oxidation film of the low-emission layers 11 and 12 because the metal used as the low-emission layers 11 and 12 is generally oxidized, and also the dielectric layer 31 , 32) also serves to increase the visible light transmittance. In addition, the optical performance of the low-emission coating 90 may be adjusted by appropriately adjusting the materials and properties of the dielectric layers 31 and 32 and the number of layers. By appropriately adjusting the materials and properties of the dielectric layers 31 and 32, the number of layers, and the thickness of each, the functional building materials 100 and 200 for windows and doors maintain a certain level of transmittance while maintaining high thermal insulation and high shielding performance. and can help to implement a commercially useful bright blue-based color.

In one embodiment of the present invention, each of the first dielectric layer 31 and the second dielectric layer 32 may include zinc aluminum oxide (ZAO).

The first dielectric layer 31 and the second dielectric layer 32 may be formed as a single layer or a multilayer.

In one embodiment of the present invention, the first dielectric layer 31 includes a first layer 3101 including zinc aluminum oxide and a second layer 3102 including silicon aluminum nitride, and the first dielectric layer ( 31) may have a multilayer structure in which the first layer and the second layer are stacked in a direction in which the second layer 3102 is in contact with the titanium oxide layer 21 .

For example, the second layer 3102 is in contact with the titanium oxide layer 21 .

In FIG. 3, the cross section of the functional building material 300 for windows and doors is schematically shown.

The low-emissivity coating 90 may further include light-absorbing metal layers 41, 42, 43, and 44 positioned above and below the first low-emission layer 11 and the second low-emission layer 12, respectively. have.

In Fig. 4, a cross section of the functional building material 400 for windows and doors is schematically shown.

The light-absorbing metal layers 41, 42, 43, and 44 are made of metal with excellent light-absorbing performance and function to control sunlight, and the color implemented by the low-emission coating 90 by adjusting the material, thickness, etc. can be adjusted.

Specifically, the light absorbing metal layers 41 , 42 , 43 , and 44 may have an extinction coefficient of about 1.5 to about 3.5 in a visible ray 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 by 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 wavelength (λ), and in the case of metals, the extinction coefficient is usually greater than zero. The extinction coefficient, k, has the relationship of absorption coefficient, α and α=(4πk)/λ, and absorption coefficient, α, is the 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 passing light (I) decreases compared to the intensity of the incident light (I0).

The light-absorbing metal layers 41, 42, 43, 44 use a metal having an extinction coefficient in the visible light region of the above range to absorb a certain portion of visible light, so that the low-emissivity coating 90 has a predetermined color. to have

For example, the light-absorbing metal layers 41 , 42 , 43 , and 44 may include at least one selected from the group consisting of Ni, Cr, an alloy of Ni and Cr, and combinations thereof, but is not limited thereto. .

The light-absorbing metal layers 41 , 42 , 43 , and 44 may be included as a single layer or a plurality of layers, and may be located on one or both surfaces of the low-emissivity layers 11 and 12 . 4 shows a case in which the light-absorbing metal layers 41, 42, 43, and 44 are formed as a plurality of layers on both surfaces of the low-emission layers 11 and 12. As shown in FIG.

The thickness of the light-absorbing metal layers 41, 42, 43, and 44, respectively, 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 use. The light-absorbing metal layers 41 , 42 , 43 , and 44 are formed within the above thickness range, and thus serve as the light-absorbing metal layers 41 , 42 , 43 and 44 and are suitable for adjusting to have predetermined transmittance and reflectance.

The low-emissivity coating 90 includes a lower dielectric layer 51 positioned in contact with the glass substrate 10; and an upper dielectric layer 52 positioned in an outermost direction opposite to the organic substrate.

5, the cross section of the functional building material 500 for windows and doors is schematically shown.

The lower dielectric layer 51 and the upper dielectric layer 52 are zinc tin oxide, zinc oxide, zinc aluminum oxide, tin oxide, bismuth oxide, silicon nitride, silicon aluminum nitride, silicon oxynitride aluminum, silicon tin nitride, and combinations thereof. It may include at least one selected from the group comprising.

Detailed descriptions of the lower dielectric layer 51 and the upper dielectric layer 52 are the same as those of the dielectric layers 31 and 32 described above.

The lower dielectric layer 51 and the upper dielectric layer 52 may have a single-layer structure or a multi-layered structure in which a plurality of layers are continuously stacked according to desired color expression or material properties to be implemented, depending on a predetermined use. have.

In one embodiment of the present invention, the lower dielectric layer 51 includes a first lower dielectric layer 5101 including silicon aluminum nitride and a second lower dielectric layer 5102 including zinc aluminum oxide, and the first lower dielectric layer 5102 includes zinc aluminum oxide. The dielectric layer 5101 may have a multi-layered structure in which the first lower dielectric layer 5101 and the second lower dielectric layer are sequentially stacked in an outward direction from the glass substrate 10 .

6, the cross section of the functional building material 600 for windows and doors is schematically shown.

In one embodiment of the present invention, the upper dielectric layer 52 includes a first upper dielectric layer 5201 comprising zinc aluminum oxide and a second upper dielectric layer 5202 comprising silicon aluminum nitride, and the glass substrate ( 10) may have a multilayer structure in which the first upper dielectric layer 5201 and the second upper dielectric layer 5202 are sequentially stacked in a backward direction.

In Fig. 7, a cross section of the functional building material 700 for windows and doors is schematically shown.

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

The glass substrate 10 may be a transparent substrate having a high visible light transmittance, for example, a glass or a transparent plastic substrate having a visible light transmittance of about 80% to about 100%. The glass substrate 10 may be, for example, glass used for construction 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, a glass substrate 10 is prepared, and then each layer of the low-emissivity coating 90 may be sequentially formed. Each layer of the low-emissivity coating 90 may be formed by a method suitable for realizing desired physical properties according to a known method.

For example, the low-emissivity layers 11 and 12, the titanium oxide layer 21, the dielectric layers 31 and 32, the light-absorbing metal layers 41, 42, 43, 44, the lower dielectric layer 51, the upper dielectric layer 52 ) and the like can be formed by a method such as a sputtering method.

The functional building material for windows and doors may be installed such that the surface of the glass substrate 10 faces outward, and the surface of the low-emissivity coating 90 faces inward.

The functional building material for windows and doors is installed so that the glass substrate 10 side faces outward, the surface of the low-emissivity coating 90 faces inward, and is spaced apart from the surface of the low-emission coating 90 at regular intervals. It can be installed with the so-called double-layer glass in which the inner space is formed together with the glass substrate.

In one embodiment of the invention:

Low-emission glass comprising a first glass substrate and a low-emission coating formed on one surface of the first glass substrate; and

Provides a multilayer glass comprising; a second glass substrate formed spaced apart from the low-emission coating,

The low-emissivity coating includes at least two low-emission layers including a first low-emission layer and a second low-emission layer sequentially positioned on the first glass substrate; and a titanium oxide layer positioned 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 multilayer glass 800 according to an embodiment of the present invention.

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

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-emissivity glass 101 may use the functional building material for the window. 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-emissivity glass 101 is the same as the description of the functional building material for windows and doors described above. Accordingly, the detailed description of each layer is also the same.

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

The multi-layer glass 800 has a low Ug (U-value) by lowering the emissivity of the low-emissivity glass 101, and implements high thermal insulation performance, specifically, the low-emissivity glass 101 is about 2% Hereinafter, more specifically, an emissivity of about 1% to about 2% may be implemented. At the same time, the multilayer glass 800 may implement a high shielding rate, and specifically, a light to solar gain (LSG) value may be about 1.9 to about 2.2.

A light to solar gain (LSG) value may be measured by Equation 1 below.

[Formula 1]

LSG (light to solar gain) = transmittance / SHGC (solar gain coefficient)

SHGC is a heat gain coefficient (SHGC, Solar Heat Gain Coefficient), which is the ratio of energy transmitted inside through the window (double-layer glass) to the energy incident on the window (double-layered glass) by solar heat (see formula 2 below).

[Formula 2]

Solar Heat Gain = SHGC × Solar Radiation

SHGC (Solar Heat Gain Coefficient) can be obtained as a value calculated through the Window 7.4 program using the optical spectrum measurement and emissivity results.

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

The 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 functional building material for windows or the multi-layer glass may implement the reflection color of the surface of the glass substrate as a light blue-based color, specifically, the other side of the glass substrate on which the low-emissivity coating is not formed (or The color index a* value measured using a color difference meter for the outer side of the double-layer glass) may be from about -0.5 to about -10, and the color index b* value may be from about -5 to about -20.

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

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 following examples.

( Example )

Example One

Using a magnetron sputtering evaporator (Selcos Cetus-S), a low-emission coating of a multilayer structure coated on a glass substrate was formed as follows, and a matt gray functional building material for windows was prepared. The layer structure of the prepared matte gray functional building material for windows is shown in Table 1 according to the lamination order.

floor division ingredient thickness upper dielectric layer Silicon Aluminum Nitride SiAlNx 33 nm zinc aluminum oxide ZAO 5 nm light-absorbing metal layer NiCr 0.4 nm 2nd low emission layer Ag 16.5 nm light-absorbing metal layer NiCr 0.4 nm second dielectric layer ZAO 5 nm titanium oxide layer TiOx 6.5 nm first dielectric layer 2nd floor SiAlNx 66 nm 1st floor ZAO 5 nm light-absorbing metal layer NiCr 0.8 nm first low emission layer Ag 15 nm light-absorbing metal layer NiCr 1.2 nm lower dielectric layer zinc aluminum oxide ZAO 5 nm Silicon Aluminum Nitride SiAlNx 30 nm glass substrate glass 6 mm

Example 2

A functional building material for windows and doors prepared in the same manner as in Example 1 was prepared, and a spacer was interposed so as to have a gap of 12 mm with a separately prepared 6 mm transparent glass, and a sealant was applied and attached to the edge to prepare a double-layer glass. The low-emissivity coating of the functional building material for windows and doors prepared in Example 1 in the multilayer glass was attached to be located inside the gap. The gap was filled with 100% by volume of Ar.

evaluation

Experimental example One

Performance analysis was performed on the functional building material for windows and doors of the single plate glass manufactured in Example 1 and the multilayer glass manufactured in Example 2 using the same for each of the following items.

<Calculation of transmittance and reflectance>

After measuring the optical spectrum with a section width of 1 nm in the range of 250 to 2500 nm using a UV-Vis-NIR spectrum measuring device (Shimadzu, Solidspec-3700), the result value is based on KS L 2514, 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 and doors, and the reflectance of the other side where the low-emissivity coating of the functional building material for windows and doors is not formed, that is, the reflectance of the glass substrate side was calculated.

<Emissivity>

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

<Color Index>

L, a*, and b* values according to 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 KS standard.

The results of Example 1 are shown in Table 2 below.

division Example 1 emissivity, ε 1.7% Visible light transmittance (%) 57.6% division transmissive side Glass surface reflection (outer color) color index L 80.7 42.9 a* -8.1 -1.2 b* -2.5 -8.9

The results of Example 2 are shown in Table 3 below.

division Example 2 Visible light transmittance (%) 51.4% SHGC 0.257 LSG 51.4/25.7 = 2.0 division transmissive side Glass surface reflection (outer color) color index L 77.1 46.7 a* -9.1 -2.8 b* -2.5 -8.6

The functional building material for windows and doors prepared in Example 1 and the multilayer glass of Example 2 using the same exhibited an emissivity of 2% or less, and an LSG value of 2.0 when manufacturing the multilayer glass, indicating an excellent shielding rate and transmittance, and a color index value It was confirmed that the outer color implements a bright blue color by

As described above, the present invention has been described with reference to the illustrated drawings, but the present invention is not limited by the embodiments and drawings disclosed in the present specification. It is obvious that variations can be made. In addition, even if the effects of the configuration of the present invention are not explicitly described and described while describing the embodiments of the present invention, it is natural that the effects predictable by the configuration should also be recognized.

10: (first) glass substrate
15: second glass substrate
11, 12: low emission layer
21: titanium oxide layer
31, 32: dielectric layer
41, 42, 43, 44: light-absorbing metal layer
51: lower dielectric layer
52: upper dielectric layer
90: low-emission coating
100, 200, 300, 400, 500, 600, 700: functional building materials for windows and doors
101: low-emission glass
800: double glass

Claims (15)

A glass substrate and a low-emissivity coating formed on one surface of the glass substrate,
The low-emissivity coating is a low-emission layer of at least two layers including a first low-emissivity layer and a second low-emission layer sequentially positioned on one surface of the glass substrate; and a titanium oxide layer positioned between the first low-emissivity layer and the second low-emissivity layer, and comprising titanium oxide; a first dielectric layer positioned between the titanium oxide layer and the first low emission layer; and a second dielectric layer positioned between the titanium oxide layer and the second low emission layer. a lower dielectric layer positioned between the glass substrate and the first low-emissivity layer so as to be positioned in contact with the glass substrate; and an upper dielectric layer positioned on the second low-emissivity layer so as to be positioned in the outermost direction opposite to the glass substrate.
According to claim 1,
The thickness ratio of the second low-emissivity layer and the first low-emissivity layer is 1:1 to 0.9, which is a functional building material for windows and doors.
According to claim 1,
The first dielectric layer and the second dielectric layer include zinc tin oxide, zinc oxide, zinc aluminum oxide, tin oxide, bismuth oxide, silicon nitride, silicon aluminum nitride, silicon aluminum oxynitride, silicon tin nitride, and combinations thereof. A functional building material for windows, comprising at least one selected from.
According to claim 1,
The first dielectric layer and the second dielectric layer each include zinc aluminum oxide, a functional building material for windows and doors.
5. The method of claim 4,
The first dielectric layer includes a first layer including zinc aluminum oxide and a second layer including silicon aluminum nitride, and the first dielectric layer includes the first layer in a direction in which the second layer is in contact with the titanium oxide layer. and a multi-layer structure in which the second layer is laminated, a functional building material for windows and doors.
According to claim 1,
The low-emissivity coating is a functional building material for windows and doors, wherein the first low-emissivity layer and the second low-emissivity layer further include a light-absorbing metal layer located on the upper and lower portions, respectively.
7. The method of claim 6,
The light-absorbing metal layer includes one selected from the group consisting of Ni, Cr, an alloy of Ni and Cr, and a combination thereof, a functional building material for windows and doors.
According to claim 1,
The lower dielectric layer and the upper dielectric layer are selected from the group comprising tin zinc oxide, zinc oxide, zinc aluminum oxide, tin oxide, bismuth oxide, silicon nitride, silicon aluminum nitride, silicon oxynitride, silicon tin nitride, and combinations thereof. A functional building material for windows and doors comprising at least one.
According to claim 1,
The lower dielectric layer includes a first lower dielectric layer including silicon aluminum nitride and a second lower dielectric layer including zinc aluminum oxide, and the first lower dielectric layer includes the first lower dielectric layer in an outward direction from the glass substrate, and A multi-layer structure in which the second lower dielectric layer is laminated, a functional building material for windows and doors.
According to claim 1,
The upper dielectric layer includes a first upper dielectric layer including zinc aluminum oxide and a second upper dielectric layer including silicon aluminum nitride, and the first upper dielectric layer and the second upper dielectric layer are sequentially stacked from the glass substrate. Structural, functional building material for windows and doors.
11. The method according to any one of claims 1 to 10,
The color index a* value measured using a color difference meter for the reflected color of the outer surface of the glass substrate is -0.5 to -10, and the color index b* value is -5 to -20, a functional building material for windows and doors.
Low-emission glass comprising a first glass substrate and a low-emission coating formed on one surface of the first glass substrate; and
Including; a second glass substrate formed spaced apart from the low-emissivity coating;
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 one surface of the first glass substrate; a titanium oxide layer positioned between the first low-emissivity layer and the second low-emissivity layer, and including titanium oxide; a first dielectric layer positioned between the titanium oxide layer and the first low emission layer; and a second dielectric layer positioned between the titanium oxide layer and the second low emission layer. a lower dielectric layer positioned between the first glass substrate and the first low-emission layer to be positioned in contact with the glass substrate; and an upper dielectric layer positioned on the second low-emissivity layer so as to be positioned in an outermost direction opposite to that of the first glass substrate.
13. The method of claim 12,
The emissivity of the low-emissivity glass is 2% or less,
The LSG value of the laminated glass is 1.9 to 2.1, the laminated glass.
13. The method of claim 12,
The color index a* value measured using a color difference meter for the reflected color of the outer surface of the first glass substrate is -0.5 to -10, and the color index b* value is -5 to -20, a multilayer glass. delete

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