WO2016208444A1 - 遮熱ガラス - Google Patents
遮熱ガラス Download PDFInfo
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- WO2016208444A1 WO2016208444A1 PCT/JP2016/067567 JP2016067567W WO2016208444A1 WO 2016208444 A1 WO2016208444 A1 WO 2016208444A1 JP 2016067567 W JP2016067567 W JP 2016067567W WO 2016208444 A1 WO2016208444 A1 WO 2016208444A1
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- glass
- thermal barrier
- coating film
- tin oxide
- barrier coating
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/26—Reflecting filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/28—Interference filters
Definitions
- the present invention relates to a thermal barrier glass having a thermal barrier coating film.
- Such a thermal barrier glass is constituted, for example, by coating one surface of a glass plate with a thermal barrier coating film.
- the thermal barrier coating film a multilayer structure in order to improve the thermal barrier performance of the thermal barrier coating film.
- the thermal barrier coating film has a multilayer structure
- the color tone is deteriorated or it is difficult to adjust the color tone due to an undesirable light interference action between the glass plate and / or each layer used. The problem can arise.
- the thermal barrier coating film provided on the thermal barrier glass has a multilayer structure of three or more layers, it becomes more difficult to adjust the color tone, and it becomes difficult to obtain a desired color tone and a preferable aesthetic feeling.
- This invention is made
- the thermal barrier glass is A glass plate having first and second surfaces facing each other; A thermal barrier coating film provided on the first surface of the glass plate; Have The thermal barrier coating film is a thermal barrier glass composed of three or more layers including a conductive tin oxide-containing layer, The yellowness index YI E313 of the reflection color C f from the thermal barrier coating film side and the reflection color C g from the glass plate side is less than ⁇ 5, CIE 1976 L * : a * : b * The color coordinates of the reflected color C f from the thermal barrier coating film side and the reflected color C g from the glass plate side expressed in the color system are a * ⁇ 0, Spectral reflection spectrum curve in the wavelength range of 380 nm to 550 nm measured with the thermal barrier glass in contact with an integrating sphere detector on the thermal barrier coating film side and in contact with white paper on the glass plate side There is a maximum of one place where the sign of the obtained first derivative B1 changes from positive to negative when Spectral
- the thermal barrier coating film is a thermal barrier glass composed of three or more layers including a conductive tin oxide-containing layer,
- the yellowness index YI E313 of the reflection color C f from the thermal barrier coating film side and the reflection color C g from the glass plate side is less than ⁇ 5, CIE 1976 L * : a * : b *
- the color coordinates of the reflected color C f from the thermal barrier coating film side and the reflected color C g from the glass substrate side, which are represented by the color system, are a * ⁇ 0, Spectral reflection spectrum curve in the wavelength range of 380 nm to 550 nm measured with the thermal barrier glass in contact with an integrating sphere detector on the thermal barrier coating film side and in contact with white paper on the glass plate side
- a thermal barrier glass is formed by coating a glass plate with a thermal barrier coating film
- the thermal barrier coating film has a multilayer structure
- the glass plate and / or the thermal barrier coating film used is configured.
- the color tone is deteriorated or it is difficult to adjust the color tone due to an unfavorable light interference action between the respective layers.
- the consciousness about design property is increasing, such a problem may become more remarkable in the future.
- the thermal barrier glass according to the present invention can provide a good color tone and a clean impression even though the thermal barrier coating film is composed of three or more layers. More specifically, in the heat-shielding glass according to the present invention, redness and yellowness contained in the reflected color are significantly suppressed, it is difficult for the viewer to feel uncomfortable, and mixing of a plurality of colors is significantly suppressed. Therefore, it can give a clean impression without dullness.
- the redness of the color included in the reflected color from the heat shielding glass can be evaluated by measuring the reflected color of the heat shielding glass using a general spectroscopic measurement device. More specifically, the evaluation can be performed by calculating a CIE 1976 L * : a * : b * color system based on a spectral spectrum measured by a measuring device having an integrating sphere detector.
- the heat shield glass is set in the above-described measurement apparatus so that the heat shield coating film of the heat shield glass is on the integrating sphere detector side, and the reflection spectrum is measured.
- the heat shield glass is set in the measuring device so that the glass surface of the heat shield glass is on the integrating sphere detector side, and the reflection spectrum is measured.
- CIE 1976 L * : a * : b * color system is calculated.
- this color system when the color coordinates of the reflected color are a * ⁇ 0, it is determined that the reflected color from the heat shielding glass is reddish, and when the color coordinates are a * ⁇ 0, It is determined that the reflected color of the image has no redness.
- the yellowness of the color included in the color reflected from the heat-shielding glass can be evaluated as a yellowness index YI E313 based on the ASTM E131 standard from the chromaticity based on JIS Z7701: 1990.
- the evaluation is based on the reflection color (referred to as “reflection color C f ”) obtained from the side of the thermal insulation coating film of the thermal insulation glass and the reflection color obtained from the side of the glass plate of the thermal insulation glass (“reflection color C g ”).
- the yellowness index YI E313 is calculated.
- the dull feeling received from the heat shielding glass is evaluated as follows using the reflection spectrum included in the reflected light from the heat shielding glass.
- FIG. 1 schematically shows the configuration of an apparatus for evaluating the dull feeling received from the heat shielding glass.
- the apparatus 1 has an integrating sphere detector 5 and a white paper 30.
- white paper 30 high-quality paper (for example, Toppan Multi Cut White PPCA4XW) having a reflectance of about 80% is used.
- a sample 10 of the heat shield glass to be evaluated is installed in the apparatus 1.
- the sample 10 is placed so that the glass plate 12 is on the paper 30 side and the thermal barrier coating film 15 is on the integrating sphere detector 5 side.
- the sample 10 is irradiated with light from the entrance 6 of the integrating sphere detector 5 in an angular range of 8 °, and the reflectance R f of the sample 10 is measured.
- the dull feeling is evaluated from the waveform of the obtained reflectance Rf .
- the spectrum waveform of the reflectance R f in the wavelength range of 380 nm to 540 nm when there is at least one peak, the sample 10 viewed from the thermal barrier coating film 15 has no dullness. If two or more peaks are determined, it is determined that the sample 10 viewed from the thermal barrier coating film 15 has a dull feeling.
- the dull feeling is judged in this way because the human eye tends to feel a dull feeling when two or more colors are mixed in a spectral waveform compared to a single color light. .
- the second evaluation is performed.
- the sample 10 is installed in the apparatus 1 in the opposite direction. That is, the sample 10 is arranged such that the glass plate 12 is on the integrating sphere detector 5 side and the thermal barrier coating film 15 is on the paper 30 side.
- the reflectivity R g of the sample 10 is measured. Then, in the spectrum waveform of the resulting reflectance R g, when the peak is only present one at most, the sample 10 as viewed from the glass plate 12, it is determined that there is no feeling of dullness, peaks are present two or more In this case, it is determined that the sample 10 viewed from the glass plate 12 has a dull feeling.
- the spectral waveform of the reflectivity R f and R g is obtained by the above measurement, since there are various forms, often it may be difficult number of determination of the peak. Therefore, in the present application, the number of peaks is determined based on a change in the first derivative value of the measured spectral waveform of the reflectances Rf and Rg .
- this operation will be described with reference to FIGS.
- FIG. 2 and 3 show an example of an operation for determining the number of peaks included in the spectral waveform of reflectance R.
- the primary differential value B of the spectrum waveform S is approximately a waveform as shown in FIG. 2A.
- the primary differential value B exhibits the behavior shown in the region (i) to the region (iii) from the smaller wavelength ⁇ side.
- the primary differential value B increases monotonously with the wavelength ⁇
- the primary differential value B decreases monotonously with the wavelength ⁇ and changes from a positive value to a negative value.
- the case where the spectral waveform S of the reflectance R has two peaks P1 and P2 is considered.
- the first-order differential value B of the spectrum waveform S is approximately a waveform as shown in FIG.
- the primary differential value B exhibits the behavior shown in the region (i) to the region (v) from the side where the wavelength ⁇ is small.
- the primary differential value B increases monotonously with the wavelength ⁇ in the first region (i), decreases monotonously with the wavelength ⁇ in the next region (ii), and changes from a positive value to a negative value in the next region (iii). Then, it turns monotonically with wavelength ⁇ , and in the next region (iv), it decreases monotonically again with wavelength ⁇ and becomes a positive to negative value, and in the next region (v), it begins to monotonously increase with wavelength ⁇ again.
- the number of peaks included in the spectrum waveform S of the reflectance R can be determined by the number of locations Q where the primary differential value B turns from positive to negative.
- the minimum pitch of the wavelength ⁇ is set to 5 nm so as not to include a small fluctuation of the first derivative B due to an error.
- the number of locations Q where the primary differential value B turns from positive to negative is 1 or less. In this case, it is determined that the peak included in the spectrum waveform is 0 or 1, and therefore it is determined that there is no dullness.
- the respective spectral waveforms of reflection R f and R g when the primary differential value B number of places Q to turn from positive to negative is 2 or more, peaks included in the spectrum waveform is 2 or more Therefore, it is determined that there is a dull feeling.
- the dull feeling of the heat shielding glass can be determined quantitatively.
- thermo shielding glass according to one embodiment of the present invention Next, with reference to FIG. 4, an example of a specific configuration of the heat shielding glass according to the embodiment of the present invention will be described.
- FIG. 4 schematically shows a cross section of a heat insulating glass (hereinafter referred to as “first heat insulating glass”) according to an embodiment of the present invention.
- the first thermal barrier glass 100 includes a glass plate 110 and a thermal barrier coating film 130.
- the glass plate 110 has a first surface 112 and a second surface 114.
- the thermal barrier coating film 130 is provided on the first surface 112 side of the glass plate 110.
- the thermal barrier coating film 130 is composed of at least three layers including a conductive tin oxide-containing layer.
- the thermal barrier coating film 130 has three layers of the first layer 140 to the third layer 150, and the conductive tin oxide-containing layer is formed as the second layer 145. Has been.
- the “conductive tin oxide-containing layer” means a conductive layer containing 50 wt% or more of tin oxide.
- First heat blocking glass 100 is characterized as described above, i.e., the reflection color C f from the side of the thermal barrier coating layer 130, and yellowness index YI E313 reflection color C g from the side of the glass plate 110 , Both are less than -5, CIE 1976 L * : a * : b *
- the color coordinates of the reflected color C f from the side of the thermal barrier coating film 130 and the reflected color C g from the side of the glass substrate 110 represented by the color system are a * ⁇ 0
- the portion Q where the sign of the primary differential value B changes from positive to negative is a maximum of 1. It has the feature that there are places.
- the thermal barrier coating film 130 is composed of at least three layers including the conductive tin oxide-containing layer 145. For this reason, in the 1st thermal insulation glass 100, favorable thermal insulation performance and favorable durability performance can be exhibited.
- the g value is a solar heat gain rate, and the heat directly transmitted to the other side (second side) with respect to the total solar heat incident from one side (first side) of the heat shielding glass ( (Transmission heat) and the heat absorbed in the heat insulating glass and then released to the second side.
- SC is a shielding coefficient.
- the g value can be measured according to ISO 9050: 2003.
- the shielding coefficient SC ⁇ 0.7 is more preferable, and SC ⁇ 0.6 is particularly preferable.
- each member that constitutes thermal barrier glass (Each member that constitutes thermal barrier glass) Next, each member which comprises the 1st thermal insulation glass 100 which has the above characteristics is demonstrated in detail. In the following description, the reference numerals shown in FIG. 4 are used to represent each member for the sake of clarity.
- the glass plate 110 may be made of, for example, soda lime glass, borosilicate glass, alkali-free glass, aluminosilicate glass, or the like.
- the glass plate 110 may be transparent or colored.
- the color of the glass plate 110 is not particularly limited, but the glass plate 110 may be, for example, green or blue.
- the thickness of the glass plate 110 is not particularly limited, but the thickness is, for example, in the range of 2 mm to 12 mm.
- the glass plate 110 is preferably a tempered glass, particularly a chemically tempered glass, because the plate thickness can be reduced.
- the thermal barrier coating film 130 is composed of three or more layers including a conductive tin oxide-containing layer.
- thermal barrier coating film 130 may have other configurations.
- FIG. 5 schematically shows a first configuration example of the thermal barrier coating film.
- the first thermal barrier coating film 530 is composed of three layers: an undercoat layer 540, a conductive tin oxide-containing layer 545, and a high refractive index layer 550.
- the high refractive index layer means a generic name of layers having a refractive index larger than 2.
- the undercoat layer 540 has a role of suppressing diffusion of predetermined elements between the glass plate 110 and the conductive tin oxide-containing layer 545. Moreover, the undercoat layer 540 reduces incident light reflection at the interface between this layer and the conductive tin oxide-containing layer 545. Thereby, the in-plane distribution of the reflected color caused by the film thickness distribution of the conductive tin oxide-containing layer can be suppressed.
- the undercoat layer 540 is made of, for example, a material mainly composed of silica or a material mainly composed of tin oxide.
- the layer mainly composed of the material A means that the material A is contained in an amount of 50% by mass or more in the target layer.
- the undercoat layer 540 may be silicon oxide (SiO x ).
- the thickness of the undercoat layer 540 is, for example, in the range of 10 nm to 100 nm.
- the conductive tin oxide-containing layer 545 may be made of tin oxide doped with antimony or fluorine.
- the doping amount is, for example, preferably in the range of 0.0 to 0.1 in the weight ratio Sb / Sn of antimony and tin in the film measured by XRF (fluorescence X-ray analysis), and 0.02 to 0.06. The range is more preferable, and the range of 0.03 to 0.05 is more preferable.
- the thickness of the conductive tin oxide-containing layer 545 is, for example, preferably in the range of 50 nm to 500 nm, more preferably in the range of 150 nm to 350 nm, and still more preferably in the range of 200 to 280 nm.
- the high refractive index layer 550 has a role of adjusting the reflection characteristics of light incident on the thermal barrier coating film 530.
- the high refractive index layer 550 may be made of, for example, titanium oxide.
- the thickness of the high refractive index layer 550 is, for example, preferably in the range of 10 nm to 70 nm, more preferably in the range of 20 nm to 50 nm, and further preferably in the range of 35 nm to 45 nm.
- the total thickness of the first thermal barrier coating film 530 is, for example, in the range of 70 nm to 670 nm, preferably in the range of 100 nm to 500 nm, more preferably in the range of 200 nm to 450 nm, and further in the range of 300 nm to 400 nm. preferable.
- the method for forming the first thermal barrier coating film 530 is not particularly limited.
- the first thermal barrier coating film 530 is formed by, for example, physical vapor deposition (for example, vacuum vapor deposition, ion plating, and sputtering), chemical vapor deposition (for example, thermal CVD, plasma CVD, and photo-CVD). Etc.) and a method selected from an ion beam sputtering method and the like.
- the first thermal barrier coating film 530 may be formed by, for example, an online CVD method.
- on-line (film formation method) means a method of forming a film on the surface of the glass during the glass manufacturing process. More specifically, when glass is manufactured, glass ribbon is moved on the molten tin bath and then slowly cooled to manufacture glass continuously. In the method), a film is formed on the upper surface of the glass ribbon during the movement of the glass ribbon. That is, in the “on-line (film forming method)”, the glass manufacturing process and the film forming process are continuously performed.
- the first thermal barrier coating film 530 be formed by an on-line CVD method because manufacturing costs can be suppressed.
- FIG. 6 schematically shows a second configuration example of the thermal barrier coating film.
- the second thermal barrier coating film 630 includes a first undercoat layer 640, a second undercoat layer 641, a conductive tin oxide-containing layer 645, and a high refractive index layer. It consists of four layers of 650.
- first undercoat layer 640 and the second undercoat layer 641 a tin oxide-containing layer and a silicon oxide (SiO 2 ) layer can be used, respectively.
- thicknesses of the first undercoat layer 640 and the second undercoat layer 641 are 10 nm to 50 nm (first) and 25 nm to 50 nm (second), respectively.
- the description relating to the first thermal barrier coating film 530 described above can be referred to, and thus the description thereof will be given here. Is omitted.
- FIG. 7 schematically shows a third configuration example of the thermal barrier coating film.
- the third thermal barrier coating film 730 includes the first undercoat layer 740, the second undercoat layer 741, the first conductive tin oxide-containing layer 745, and the first 2 conductive tin oxide-containing layers 746.
- first conductive tin oxide-containing layer 745 and the second conductive tin oxide-containing layer 746 those similar to the conductive tin oxide-containing layer 545 of the first thermal barrier coating film 530 can be used.
- first conductive tin oxide-containing layer 745 may be composed of tin oxide doped with antimony
- second conductive tin oxide-containing layer 746 may be composed of tin oxide doped with fluorine. .
- the reverse may be sufficient.
- examples of the thicknesses of the first conductive tin oxide-containing layer 745 and the second conductive tin oxide-containing layer 746 are 110 nm to 210 nm (first) and 160 nm to 300 nm (second), respectively.
- first conductive tin oxide-containing layer 745 is tin oxide doped with antimony
- second conductive tin oxide-containing layer 746 is tin oxide doped with fluorine
- tin oxide doped with antimony and tin oxide doped with fluorine It may be interpreted that it is a laminated layer.
- the description relating to the second thermal barrier coating film 630 can be referred to.
- a silicon oxide (SiO 2 ) layer can be used.
- the thicknesses of the first undercoat layer 740 and the second undercoat layer 741 are 10 nm to 50 nm (first) and 25 nm to 50 nm (second), respectively.
- FIG. 8 schematically shows a fourth configuration example of the thermal barrier coating film.
- the fourth thermal barrier coating film 830 includes an undercoat layer 840, a first conductive tin oxide-containing layer 845, and a second conductive tin oxide-containing layer 846. Composed of layers.
- the above-described description of the first thermal barrier coating film 530 can be referred to.
- the description regarding the third thermal barrier coating film 730 can be referred to.
- the thermal barrier coating film 130 can be implemented by combining various configurations such as a 4-layer configuration in addition to a 3-layer configuration.
- the heat insulation glass of this embodiment has a haze of less than 0.8%.
- the film formation temperature of the conductive tin oxide layer is kept as low as possible to suppress the enlargement of the conductive tin oxide crystal grains. It can be considered to be composed of fine particles.
- Examples 1 to 6 are Examples, and Examples 7 to 14 are Comparative Examples.
- Example 1 Thermal barrier glass was manufactured by the following method.
- a thermal barrier coating film was formed on the surface of the glass plate by an atmospheric pressure CVD method.
- the structure of the thermal barrier coating film was a three-layer structure as shown in FIG.
- the undercoat layer was a SiOx layer (target thickness 55 nm).
- the conductive tin oxide-containing layer was an antimony-doped tin oxide layer (target thickness 260 nm).
- the high refractive index layer was a titanium oxide layer (target thickness 40 nm).
- the temperature of the glass plate during the formation of the SiOx layer was about 670 ° C.
- the antimony-doped tin oxide layer is obtained by diluting a mixed gas obtained by vaporizing a raw material of monobutyltin chloride (MBTC), water, and antimony trichloride (SbCl 3 ) with air as a raw material gas at about 590 ° C.
- the film was formed.
- the titanium oxide layer was formed at about 540 ° C. using tetratitanium isopropoxide (TTIP), a mixed gas obtained by vaporizing MBTC raw material, diluted with nitrogen as a raw material.
- TTIP tetratitanium isopropoxide
- the glass plate After the formation of the thermal barrier coating film, the glass plate is cooled and cut to obtain a thermal barrier glass including a glass plate (transparent color) having dimensions of 300 mm in length, 300 mm in width, and 5 mm in thickness (hereinafter referred to as Example 1). Called thermal barrier glass).
- Example 2 to Example 6 In the same manner as in Example 1, a thermal barrier glass (hereinafter referred to as “thermal barrier glass according to Examples 2 to 6”) was produced. However, in these examples, the type (color) and thickness of the glass plate were changed from those in Example 1.
- Example 7 In the same manner as in Example 1, a heat shield glass (hereinafter referred to as “heat shield glass according to Example 7”) was produced. However, in this Example 7, a thermal barrier coating film having a four-layer structure as shown in FIG. 7 was used.
- the first undercoat layer was a SnO 2 layer having a thickness of 19 nm
- the second undercoat layer was a SiO 2 layer having a thickness of 38 nm.
- the first conductive tin oxide-containing layer was an antimony-doped tin oxide layer having a thickness of 162 nm
- the second conductive tin oxide-containing layer was a fluorine-doped tin oxide layer having a thickness of 230 nm.
- Example 7 a transparent plate glass having a thickness of 6 mm was used as the glass plate.
- thermal barrier glass according to Examples 8 to 10 In the same manner as in Example 7, a thermal barrier glass (hereinafter referred to as “thermal barrier glass according to Examples 8 to 10”) was produced. However, in these examples, the type (color) and thickness of the glass plate were changed from those in Example 7.
- Example 11 In the same manner as in Example 1, a heat insulating glass (hereinafter referred to as “heat insulating glass according to Example 11”) was produced. However, in Example 11, a four-layer structure as shown in FIG. 6 was used as the thermal barrier coating film.
- the first undercoat layer was a SnO 2 layer having a thickness of 19 nm
- the second undercoat layer was a SiO 2 layer having a thickness of 38 nm.
- the conductive tin oxide-containing layer was a 260 nm thick fluorine-doped tin oxide layer
- the high refractive index layer was a 37 nm thick titanium oxide layer.
- Example 12 A heat shield glass (hereinafter referred to as “heat shield glass according to Example 12”) was produced in the same manner as in Example 11. However, in Example 12, 6 mm thick glass colored with a green color (high heat shielding Green glass) was used as the glass plate.
- Example 13 In the same manner as in Example 1, a heat insulating glass (hereinafter referred to as “heat insulating glass according to Example 13”) was produced. However, in Example 13, the thermal barrier coating film having a three-layer structure as shown in FIG. 5 was used.
- the undercoat layer was a SnO 2 layer having a thickness of 55 nm.
- the conductive tin oxide-containing layer was an antimony-doped tin oxide layer having a thickness of 310 nm, and the high refractive index layer was a titanium oxide layer having a thickness of 40 nm.
- Example 14 In the same manner as in Example 13, a thermal barrier glass (hereinafter referred to as “thermal barrier glass according to Example 14”) was produced. However, in Example 14, 6 mm thick glass (BNFL) colored blue-green was used as the glass plate.
- BNFL 6 mm thick glass
- Table 1 below collectively shows the configuration of the heat shielding glass according to each of Examples 1 to 14.
- this measurement was performed by irradiating light from the glass plate side (that is, the opposite side of the thermal barrier coating film) of each thermal barrier glass.
- shielding coefficient SC In the column of “shielding coefficient SC” in Table 2 below, the shielding coefficient SC obtained for each heat-shielding glass is collectively shown.
- thermal barrier glass according to Examples 1 to 6 had an SC of less than 0.6 and had good thermal barrier performance.
- FIG. 9 to FIG. 12 show examples of spectral waveforms of reflected light obtained in some heat shielding glasses.
- FIG. 9 shows the results obtained for the thermal insulation glass according to Example 1
- FIG. 10 shows the results obtained for the thermal insulation glass according to Example 3
- FIG. 11 relates to Example 8.
- the result obtained in the heat insulation glass is shown
- FIG. 12 shows the result obtained in the heat insulation glass according to Example 10.
- Each figure shows the respective spectrum waveforms of the reflectance R f (that is, the result on the thermal barrier coating film side) and the reflectance R g (that is, the result on the glass plate side).
- the thermal barrier glass according to Example 8 the spectral reflectance R g, although peaks have only a single, because the spectrum of reflectance R f, which peaks are present two, dull feeling It is judged that there is (that is, a clean impression cannot be obtained).
- the thermal barrier glass according to Example 10 has a dull feeling (that is, a clean impression cannot be obtained) because there are two peaks in any spectrum of the reflectance Rg and the reflectance Rf. It is judged.
- the “number of peaks” column in the above-mentioned Table 2 shows the number of peaks observed in the reflectance R g and the reflectance R f in each thermal barrier glass.
- the thermal barrier glasses according to Examples 1 to 6 contain only one peak in the spectra of the reflectance Rg and the reflectance Rf . From this, it was found that the thermal barrier glasses according to Examples 1 to 6 can provide a clean impression when viewed from either side of the thermal barrier coating film and the glass plate.
- the present invention can be used for heat shield glass and the like.
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Abstract
Description
相互に対向する第1および第2の表面を有するガラス板と、
前記ガラス板の前記第1の表面に設けられた遮熱コーティング膜と、
を有し、
前記遮熱コーティング膜は、導電性酸化スズ含有層を含む3層以上で構成された、遮熱ガラスであって、
前記遮熱コーティング膜の側からの反射色Cfおよび前記ガラス板の側からの反射色CgのイエローネスインデックスYI E313は、いずれも-5未満であり、
CIE 1976 L*:a*:b*表色系で表される、前記遮熱コーティング膜の側からの反射色Cfおよび、前記ガラス板の側からの反射色Cgの色座標は、a*<0であり、
当該遮熱ガラスを、前記遮熱コーティング膜の側を積分球ディテクタに接触させ、前記ガラス板の側を白色紙に接触させた状態で測定される、波長380nm~550nmの範囲における分光反射スペクトル曲線を一次微分した際に、得られる一次微分B1の符号が正から負に変わる箇所が最大1箇所存在し、
当該遮熱ガラスを、前記ガラス板の側を積分球ディテクタに接触させ、前記遮熱コーティング膜の側を白色紙に接触させた状態で測定される、波長380nm~550nmの範囲における分光反射スペクトル曲線を一次微分した際に、得られる一次微分B2の符号が正から負に変わる箇所が最大1箇所存在する。
相互に対向する第1および第2の表面を有するガラス板と、
前記ガラス板の前記第1の表面に設けられた遮熱コーティング膜と、
を有し、
前記遮熱コーティング膜は、導電性酸化スズ含有層を含む3層以上で構成された、遮熱ガラスであって、
前記遮熱コーティング膜の側からの反射色Cfおよび前記ガラス板の側からの反射色CgのイエローネスインデックスYI E313は、いずれも-5未満であり、
CIE 1976 L*:a*:b*表色系で表される、前記遮熱コーティング膜の側からの反射色Cfおよび、前記ガラス基板の側からの反射色Cgの色座標は、a*<0であり、
当該遮熱ガラスを、前記遮熱コーティング膜の側を積分球ディテクタに接触させ、前記ガラス板の側を白色紙に接触させた状態で測定される、波長380nm~550nmの範囲における分光反射スペクトル曲線を一次微分した際に、得られる一次微分B1の符号が正から負に変わる箇所が最大1箇所存在し、
当該遮熱ガラスを、前記ガラス板の側を積分球ディテクタに接触させ、前記遮熱コーティング膜の側を白色紙に接触させた状態で測定される、波長380nm~550nmの範囲における分光反射スペクトル曲線を一次微分した際に、得られる一次微分B2の符号が正から負に変わる箇所が最大1箇所存在する、遮熱ガラスが提供される。
遮熱ガラスからの反射色に含まれる色の赤みは、一般的な分光測定装置を用いて、遮熱ガラスの反射色を測定することにより評価することができる。より具体的には、積分球ディテクタを有する測定装置によって測定される分光スペクトルをもとにCIE 1976 L*:a*:b*表色系を計算することにより評価することができる。測定方法としては、前述の測定装置に、遮熱ガラスの遮熱コーティング膜が積分球ディテクタの側となるようにして、遮熱ガラスを設定し、反射スペクトルを測定する。あるいは前記測定装置に、遮熱ガラスのガラス面が積分球ディテクタの側となるようにして、遮熱ガラスを設定し、反射スペクトルを測定する。
遮熱ガラスからの反射色に含まれる色の黄色みは、JIS Z7701:1990に準拠した色度からASTM E131規格に準拠してイエローネスインデックスYI E313として評価することができる。評価は、遮熱ガラスの遮熱コーティング膜の側から得られる反射色(「反射色Cf」と称する)、および遮熱ガラスのガラス板の側から得られる反射色(「反射色Cg」と称する)のそれぞれに対して、イエローネスインデックスYI E313が算定される。
遮熱ガラスの色調を判断においては、多くの場合ガラスを白色の紙の上に置き観察者が正面から目視する。この観察方法で目視する光は、ガラスを透過した入射光が紙の表面で反射した成分およびコーティングを含むガラスの表面・裏面からの反射成分の重ね合わせである。発明者らはこのような観察方法に則した反射率の測定スペクトルを用いて、くすみ感を評価する手法を考案した。
次に、図4を参照して、本発明の一実施形態による遮熱ガラスの具体的な構成の一例について説明する。
・遮熱コーティング膜130の側からの反射色Cf、およびガラス板110の側からの反射色CgのイエローネスインデックスYI E313は、いずれも-5未満であり、
・CIE 1976 L*:a*:b*表色系で表される、遮熱コーティング膜130の側からの反射色Cfおよびガラス基板110の側からの反射色Cgの色座標は、a*<0であり、
・ガラス板110および遮熱コーティング膜130の何れの側から測定された、波長380nm~550nmの範囲における分光反射スペクトル曲線においても、一次微分値Bの符号が正から負に変わる箇所Qが最大1箇所存在する
という特徴を有する。
一般に、遮熱ガラスの遮熱性能は、以下の(1)式で表すことができる:
SC=g値/0.88 (1)式
ここで、g値は日射熱取得率であり、遮熱ガラスの一方の側(第1の側)から入射される全太陽熱に対する、他方の側(第2の側)まで直接透過される熱(透過熱)と、遮熱ガラスの内部で吸収され、その後第2の側に放出される熱との総和の割合で表される。また、SCは遮蔽係数である。g値は、ISO9050:2003に準拠して測定することができる。
次に、前述のような特徴を有する第1の遮熱ガラス100を構成する各部材について、より詳しく説明する。なお、以下の説明では、明確化のため、各部材を表す際に、図4に示した参照符号を使用する。
ガラス板110は、例えば、ソーダライムガラス、ホウ珪酸ガラス、無アルカリガラス、アルミノシリケートガラス等で構成されても良い。
遮熱コーティング膜130は、導電性酸化スズ含有層を含む、3層以上で構成される。
図5には、遮熱コーティング膜の第1の構成例を概略的に示す。
図6には、遮熱コーティング膜の第2の構成例を概略的に示す。
図7には、遮熱コーティング膜の第3の構成例を概略的に示す。
図8には、遮熱コーティング膜の第4の構成例を概略的に示す。
以下の方法で、遮熱ガラスを製造した。
例1と同様の方法により、遮熱ガラス(以下、「例2~例6に係る遮熱ガラス」と称する)を製造した。ただし、これらの例では、ガラス板の種類(色)と厚さを、例1の場合とは変化させた。
例1と同様の方法により、遮熱ガラス(以下、「例7に係る遮熱ガラス」と称する)を製造した。ただし、この例7では、遮熱コーティング膜として、図7に示したような4層構成のものを使用した。第1のアンダーコート層は、厚さ19nmのSnO2層とし、第2のアンダーコート層は、厚さ38nmのSiO2層とした。また、第1の導電性酸化スズ含有層は、厚さ162nmのアンチモンドープ酸化スズ層とし、第2の導電性酸化スズ含有層は、厚さ230nmのフッ素ドープ酸化スズ層とした。
例7と同様の方法により、遮熱ガラス(以下、「例8~例10に係る遮熱ガラス」と称する)を製造した。ただし、これらの例では、ガラス板の種類(色)と厚さを、例7の場合とは変化させた。
例1と同様の方法により、遮熱ガラス(以下、「例11に係る遮熱ガラス」と称する)を製造した。ただし、この例11では、遮熱コーティング膜として、図6に示したような4層構成のものを使用した。第1のアンダーコート層は、厚さ19nmのSnO2層とし、第2のアンダーコート層は、厚さ38nmのSiO2層とした。また、導電性酸化スズ含有層は、厚さ260nmのフッ素ドープ酸化スズ層とし、高屈折率層は、厚さ37nmの酸化チタン層とした。
例11と同様の方法により、遮熱ガラス(以下、「例12に係る遮熱ガラス」と称する)を製造した。ただし、この例12では、ガラス板として、緑色に着色された厚さ6mmのガラス(高遮熱性Greenガラス)を使用した。
例1と同様の方法により、遮熱ガラス(以下、「例13に係る遮熱ガラス」と称する)を製造した。ただし、この例13において、遮熱コーティング膜は、図5に示したような3層構成のものを使用した。アンダーコート層は、厚さ55nmのSnO2層とした。また、導電性酸化スズ含有層は、厚さ310nmのアンチモンドープ酸化スズ層とし、高屈折率層は、厚さ40nmの酸化チタン層とした。
例13と同様の方法により、遮熱ガラス(以下、「例14に係る遮熱ガラス」と称する)を製造した。ただし、この例14では、ガラス板として、青緑色に着色された厚さ6mmのガラス(BNFL)を使用した。
各遮熱ガラスについて、Perkin Elmer製分光光度計Lambda950を用いて分光測定し、ISO9050:2003に準拠した方法で、遮蔽係数SCを算出した。
各遮熱ガラスについて、該遮熱ガラスからの反射色CfおよびCgに含まれる色の赤みを、前述の方法で評価した。
各遮熱ガラスについて、該遮熱ガラスからの反射色CfおよびCgに含まれる色の黄色みを、前述の方法で評価した。
各遮熱ガラスについて、前述の方法により、くすみ感を評価した。
5 積分球ディテクタ
10 サンプル
12 ガラス板
15 遮熱コーティング膜
30 白い紙
100 遮熱ガラス
110 ガラス板
112 第1の表面
114 第2の表面
130 遮熱コーティング膜
140 第1の層
145 第2の層(導電性酸化スズ含有層)
150 第3の層
530 第1の遮熱コーティング膜
540 アンダーコート層
545 導電性酸化スズ含有層
550 高屈折率層
630 第2の遮熱コーティング膜
640 第1のアンダーコート層
641 第2のアンダーコート層
645 導電性酸化スズ含有層
650 高屈折率層
730 第3の遮熱コーティング膜
740 第1のアンダーコート層
741 第2のアンダーコート層
745 第1の導電性酸化スズ含有層
746 第2の導電性酸化スズ含有層
830 第4の遮熱コーティング膜
840 第1のアンダーコート層
841 第2のアンダーコート層
845 第1の導電性酸化スズ含有層
846 第2の導電性酸化スズ含有層
Claims (7)
- 相互に対向する第1および第2の表面を有するガラス板と、
前記ガラス板の前記第1の表面に設けられた遮熱コーティング膜と、
を有し、
前記遮熱コーティング膜は、導電性酸化スズ含有層を含む3層以上で構成された、遮熱ガラスであって、
前記遮熱コーティング膜の側からの反射色Cfおよび前記ガラス板の側からの反射色CgのイエローネスインデックスYI E313は、いずれも-5未満であり、
CIE 1976 L*:a*:b*表色系で表される、前記遮熱コーティング膜の側からの反射色Cfおよび、前記ガラス板の側からの反射色Cgの色座標は、a*<0であり、
当該遮熱ガラスを、前記遮熱コーティング膜の側を積分球ディテクタに接触させ、前記ガラス板の側を白色紙に接触させた状態で測定される、波長380nm~550nmの範囲における分光反射スペクトル曲線を一次微分した際に、得られる一次微分B1の符号が正から負に変わる箇所が最大1箇所存在し、
当該遮熱ガラスを、前記ガラス板の側を積分球ディテクタに接触させ、前記遮熱コーティング膜の側を白色紙に接触させた状態で測定される、波長380nm~550nmの範囲における分光反射スペクトル曲線を一次微分した際に、得られる一次微分B2の符号が正から負に変わる箇所が最大1箇所存在する、遮熱ガラス。 - 日射熱取得率をg値とし、以下の(1)式で表される値を遮蔽係数SCとしたとき、
SC=g値/0.88 (1)式
前記遮蔽係数SCは、0.7未満である、請求項1に記載の遮熱ガラス。 - 前記導電性酸化スズ含有層は、アンチモンまたはフッ素がドープされた酸化スズを有する、請求項1または2に記載の遮熱ガラス。
- 前記遮熱コーティング膜は、前記導電性酸化スズ含有層の上に、酸化チタンの層を有する、請求項1乃至3のいずれか一つに記載の遮熱ガラス。
- 前記遮熱コーティング膜は、前記導電性酸化スズ含有層の下に、酸化ケイ素層および/または酸化スズ層を有するアンダーコート層を有する、請求項1乃至4のいずれか一つに記載の遮熱ガラス。
- 前記アンダーコート層は、2層で構成される、請求項5に記載の遮熱ガラス。
- 前記導電性酸化スズ含有層は、アンチモンがドープされた酸化スズ層と、フッ素がドープされた酸化スズ層との2層構造を有する、請求項1乃至6のいずれか一つに記載の遮熱ガラス。
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