CN116715539B - High-reflection heat-insulation ceramic glaze layer, ceramic glaze, ceramic tile and preparation method thereof - Google Patents
High-reflection heat-insulation ceramic glaze layer, ceramic glaze, ceramic tile and preparation method thereof Download PDFInfo
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- CN116715539B CN116715539B CN202310982686.8A CN202310982686A CN116715539B CN 116715539 B CN116715539 B CN 116715539B CN 202310982686 A CN202310982686 A CN 202310982686A CN 116715539 B CN116715539 B CN 116715539B
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- 239000000919 ceramic Substances 0.000 title claims abstract description 140
- 238000009413 insulation Methods 0.000 title claims abstract description 106
- 238000002360 preparation method Methods 0.000 title claims abstract description 35
- 239000013078 crystal Substances 0.000 claims abstract description 110
- 239000002245 particle Substances 0.000 claims abstract description 76
- 229910052861 titanite Inorganic materials 0.000 claims abstract description 34
- 239000010936 titanium Substances 0.000 claims description 127
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 125
- 229910052719 titanium Inorganic materials 0.000 claims description 125
- 238000010304 firing Methods 0.000 claims description 53
- 239000000843 powder Substances 0.000 claims description 31
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 21
- 239000002994 raw material Substances 0.000 claims description 21
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 18
- 229910052791 calcium Inorganic materials 0.000 claims description 12
- 239000011575 calcium Substances 0.000 claims description 12
- 235000010215 titanium dioxide Nutrition 0.000 claims description 12
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 8
- 239000011449 brick Substances 0.000 abstract description 5
- 230000000052 comparative effect Effects 0.000 description 26
- 238000009826 distribution Methods 0.000 description 13
- 239000000126 substance Substances 0.000 description 12
- 238000002310 reflectometry Methods 0.000 description 10
- 239000005995 Aluminium silicate Substances 0.000 description 8
- 229910010413 TiO 2 Inorganic materials 0.000 description 8
- 235000012211 aluminium silicate Nutrition 0.000 description 8
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 8
- 239000010453 quartz Substances 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 238000005245 sintering Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 229910021532 Calcite Inorganic materials 0.000 description 5
- 230000005496 eutectics Effects 0.000 description 5
- 230000005855 radiation Effects 0.000 description 5
- 239000000454 talc Substances 0.000 description 5
- 229910052623 talc Inorganic materials 0.000 description 5
- 235000012222 talc Nutrition 0.000 description 5
- 239000004408 titanium dioxide Substances 0.000 description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000001878 scanning electron micrograph Methods 0.000 description 4
- 238000003892 spreading Methods 0.000 description 4
- 239000001038 titanium pigment Substances 0.000 description 4
- 238000002441 X-ray diffraction Methods 0.000 description 3
- 229910052656 albite Inorganic materials 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- 239000010456 wollastonite Substances 0.000 description 3
- 229910052882 wollastonite Inorganic materials 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000010459 dolomite Substances 0.000 description 2
- 229910000514 dolomite Inorganic materials 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- BDAGIHXWWSANSR-NJFSPNSNSA-N hydroxyformaldehyde Chemical compound O[14CH]=O BDAGIHXWWSANSR-NJFSPNSNSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910000018 strontium carbonate Inorganic materials 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229940072033 potash Drugs 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- 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
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/02—Frit compositions, i.e. in a powdered or comminuted form
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/86—Glazes; Cold glazes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- Finishing Walls (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a high-reflection heat-insulation ceramic glaze layer, a ceramic glaze, a ceramic brick and a preparation method thereof, and relates to the technical field of ceramics. Wherein, the content of the titanite crystal in the high-reflection heat insulation ceramic glaze layer is 30-45 percent by mass percent; in the titanic sphene crystals, according to the particle number, 15% -35% of titanic sphene crystals are uniformly distributed at 300-600 nm, 50% -70% of titanic sphene crystals are uniformly distributed at 600-900 nm, 5% -25% of titanic sphene crystals are uniformly distributed at 900-1200 nm, 2% -10% of titanic sphene crystals are uniformly distributed at 1200-1500 nm, 1% -5% of titanic sphene crystals are uniformly distributed at 1500-2000 nm, and the titanic sphene crystals are distributed equivalent to sunlight with the wavelength of 300-2500 nm, so that all-band sunlight can be reflected well, and a good heat insulation effect is achieved.
Description
Technical Field
The invention relates to the technical field of ceramics, in particular to a high-reflection heat-insulation ceramic glaze layer, ceramic glaze, ceramic brick and a preparation method thereof.
Background
In summer, the building is strongly irradiated by sunlight, and the indoor temperature is higher, so that the refrigerating energy consumption of the air conditioner is larger. The sunlight reflecting heat insulating ceramic bricks are applied to the roof and the outer wall of the building, so that the temperature of the surface of the building and the surrounding air can be effectively reduced, the passive cooling of the building is realized, the power consumption of refrigeration equipment is reduced, and the effects of energy conservation and environmental protection are achieved. The reflective heat insulation performance of the sunlight reflective heat insulation ceramic tile mainly depends on the reflection of sunlight by the glaze layer.
In the prior art, there are many cases where titanium sphene crystals are formed in the glaze layer to make ceramic glaze have high reflectivity to sunlight, such as patent application publication number CN106830684A, CN111499202B, CN 111875414B. Among the above patent applications, patent application publication No. CN106830684a discloses solar reflectance, but the solar reflectance data is calculated by a weighted average method, which cannot fully explain that the solar light has high reflectance for all the wavelength bands, and the content and particle size distribution of the titanite crystal are not described, and these parameters are critical factors that affect reflection of the solar light in all the wavelength bands; in addition to the problems, the scheme also has the problems of large glaze thickness, large production and manufacturing difficulty and high production cost.
While the patent application publication CN111499202B claims to have a high reflectance, a significant decrease in thermal reflectance occurs for solar light having a wavelength greater than 600nm, which results in a significant compromise in the insulating effect of the glaze.
Disclosure of Invention
In view of the shortcomings of the prior art, the invention aims to provide a high-reflection heat-insulation ceramic glaze, a high-reflection heat-insulation ceramic tile and a preparation method thereof, and aims to improve the reflection heat-insulation performance of the ceramic tile on full-band sunlight.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the high-reflection heat-insulation ceramic glaze layer comprises, by mass, 30% -45% of titanite crystals; in the titanic sphene crystals, according to the particle number, 15% -35% of titanic sphene crystals are uniformly distributed at 300-600 nm, 50% -70% of titanic sphene crystals are uniformly distributed at 600-900 nm, 5% -25% of titanic sphene crystals are uniformly distributed at 900-1200 nm, 2% -10% of titanic sphene crystals are uniformly distributed at 1200-1500 nm, and 1% -5% of titanic sphene crystals are uniformly distributed at 1500-2000 nm.
The high-reflection heat-insulating ceramic glaze forms the high-reflection heat-insulating ceramic glaze layer after firing, and comprises the following preparation raw materials in percentage by mass: 30-50% of titanium frit, 10-30% of titanium sphene powder and 4-7.5% of titanium white.
The high-reflection heat-insulation ceramic glaze, wherein the average grain diameter of the titanite powder is 1-4 mu m.
The high-reflection heat-insulation ceramic glaze comprises, by mass, 10% or less of TiO in the titanium frit 2 ≤15%,Al 2 O 3 ≤6%。
The high-reflection heat-insulation ceramic glaze comprises titanium and calcium in a molar ratio of 1:1-1:1.5 in the preparation raw materials of the high-reflection heat-insulation ceramic glaze.
The high-reflection heat-insulation ceramic tile comprises a green body layer, a ground coat layer and the high-reflection heat-insulation ceramic glaze layer which are sequentially arranged.
The thickness of the green body layer of the high-reflection heat-insulation ceramic tile is 3-20 mm; the thickness of the ground coat layer is 0.1-0.2 mm; the thickness of the high-reflection heat-insulation ceramic glaze layer is 0.15-0.4 mm.
The high-reflection heat-insulation ceramic tile has a glaze gloss of 3-30 degrees.
A method for preparing a ceramic tile for preparing the high-reflection heat-insulation ceramic tile, comprising the following steps: applying a primer on the green body layer to form a primer layer after firing; coating the high-reflection heat-insulation ceramic glaze on the ground glaze; firing at 1170-1230 deg.c for 30-90 min.
The preparation method of the ceramic tile comprises the following steps of: siO (SiO) 2 60%~70%、Al 2 O 3 20%~30%、Na 2 O 3%~5%、K 2 1 to 3 percent of O, 0.5 to 1.5 percent of CaO, 0.5 to 1.5 percent of MgO and burningThe loss is 1-3%.
Advantageous effects
The first aspect of the present invention provides a highly reflective insulating ceramic glaze layer, wherein the titanium sphene content in the highly reflective insulating ceramic glaze layer is 30% -45%, and in the titanium sphene crystals, 15% -35% of the titanium sphene crystals have a particle size uniformly distributed at 300-600 nm, 50% -70% of the titanium sphene crystals have a particle size uniformly distributed at 600-900 nm, 5% -25% of the titanium sphene crystals have a particle size uniformly distributed at 900-1200 nm, 2% -10% of the titanium sphene crystals have a particle size uniformly distributed at 1200-1500 nm, and 1% -5% of the titanium sphene crystals have a particle size uniformly distributed at 1500-2000 nm, and the highly reflective insulating ceramic glaze layer has a high reflective performance for sunlight with a wavelength of 300-2500 nm by containing a large amount of titanium sphene crystals having a specific particle size.
The second aspect of the invention provides a high-reflection heat-insulation ceramic glaze, which comprises specific content of titanium frit, titanium sphene powder and titanium white, wherein a high-reflection heat-insulation ceramic glaze layer formed after firing comprises a large number of titanium sphene crystals with particle size distribution of 300-2000 nm.
The invention provides a high-reflection heat-insulation ceramic tile, which is provided with the high-reflection heat-insulation ceramic glaze layer, has high reflection performance on all-band sunlight, has glaze glossiness of 3-30 degrees, effectively avoids light pollution caused by light reflection, and meets the application requirements of the ceramic tile on roofs and outer walls.
The fourth aspect of the invention provides a method for preparing a ceramic tile, wherein the high-reflection heat-insulation ceramic tile prepared by the method has the following characteristics: the thickness of the green body layer is 3-20 mm, the thickness of the ground coat layer is 0.1-0.2 mm, and the thickness of the high-reflection heat insulation ceramic glaze layer is 0.15-0.4 mm. The preparation method adopts a one-time firing process, is suitable for the preparation process and firing schedule of the current building ceramic tile, and has high production efficiency, energy conservation and environmental protection.
Drawings
FIG. 1 is an XRD pattern for example 1;
FIG. 2 is an SEM image of example 1;
FIG. 3 is a graph of reflectivity for example 1;
FIG. 4 is an SEM image of comparative example 1;
fig. 5 is a reflectance graph of comparative example 1.
Detailed Description
The invention provides a high-reflection heat-insulation ceramic glaze layer, a ceramic glaze, a ceramic brick and a preparation method thereof, and aims to make the purposes, the technical scheme and the effects of the invention clearer and more definite. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The first aspect of the invention provides a high-reflection heat-insulation ceramic glaze layer, wherein the content of titanite crystals in the high-reflection heat-insulation ceramic glaze layer is 30-45% by mass percent; in the titanic sphene crystals, according to the particle number, 15% -35% of titanic sphene crystals are uniformly distributed at 300-600 nm, 50% -70% of titanic sphene crystals are uniformly distributed at 600-900 nm, 5% -25% of titanic sphene crystals are uniformly distributed at 900-1200 nm, 2% -10% of titanic sphene crystals are uniformly distributed at 1200-1500 nm, and 1% -5% of titanic sphene crystals are uniformly distributed at 1500-2000 nm. From the characteristic of solar energy distribution, the wavelength of solar radiation is more than 99% of the total radiation energy and is between 0.15 and 4 mu m, and the band range of solar radiation observed on the ground is about 300 to 2500nm. The ceramic glaze layer is composed of a glass phase and a crystal phase, and sunlight can reach the glaze layer to perform the functions of transmission, absorption, reflection, scattering and the like. In the range of 300-2500 nm, the glaze layer has weak transmission and absorption effects on sunlight and strong reflection and scattering effects, so that high reflectivity is obtained. Mie scattering occurs when the particle size corresponds to the wavelength of the solar radiation, so that a strong scattering effect is obtained. Mie scattering is a phenomenon of scattering particles with a particle size close to or larger than the wavelength of incident light, so that although the particle size of the titanic sphene crystal of the high-reflection heat-insulating ceramic glaze layer is only distributed in the range of 300-2000 nm, the titanic sphene crystal still has higher reflection performance corresponding to full-band sunlight with the wavelength of 300-2500 nm.
If the particle size is much smaller than the wavelength of the incident light, rayleigh scattering will occur. The intensity of the scattered light scattered by Rayleigh is inversely proportional to the wavelength of the incident light to the fourth power, so if the particle size distribution range of the titanite crystals in the glaze layer is far from the main solar radiation wavelength, the reflectivity of the titanite crystals in the visible light region and the near infrared region is far lower than that of the titanite crystals in the middle and far infrared wavelength regions, and the titanite crystals cannot have high reflectivity for all-band sunlight.
At the same time, the content of titanite crystals in the glaze layer and the thickness of the glaze layer also have direct influence on the reflection performance.
The second aspect of the invention provides a high-reflection heat-insulating ceramic glaze, which is formed into the high-reflection heat-insulating ceramic glaze layer after firing, and comprises the following preparation raw materials in percentage by mass: 30-50% of titanium frit, 10-30% of titanium sphene powder, 4-7.5% of titanium white and the balance of other raw materials. In the high-reflection heat-insulation ceramic glaze layer, titanium frit, titanium white powder and titanium sphene powder are all sources of Ti. In the process of rapid firing, ti, si, ca, O elements in the glaze all participate in the reaction to generate titanite crystals, and the Ti of different sources participate in the reaction in different processes. The titanium frit is a source of titanium and a main source of eutectic, has strong melting capacity at high temperature, can melt most of titanium white powder and titanite powder, and can be used as crystal nucleus in the part which is not melted. The titanium dioxide and titanite powder are melted and then separated out small particles of titanite crystals together with the original titanium component of the titanium frit, and part of titanite powder is melted and then exists in the glaze layer in the form of large titanium sphete crystal particles smaller than 2 mu m. Preferably, the firing temperature of the high-reflection heat-insulation ceramic glaze is 1170-1230 ℃.
When the formula system of the glaze is not proper, titanium exists in a rutile form (the content of the corresponding titanite is reduced) after firing, and the titanite is granular and the rutile is rod-shaped. In the equivalent TiO 2 The sunlight reflection ratio of the glaze surface with titanite as the main component is higher than that of the glaze surface with rutile as the main component under the conditions of the content and the thickness of the glaze layer, so that the glaze material is prepared byWhen not appropriate, the solar reflectance of the fired glaze is low. In addition, the glaze containing more rutile also has yellow color, which affects visual effect.
According to the characteristic that the titanium frit has strong dissolving capability to crystals at high temperature, the high-reflection heat-insulation ceramic glaze takes the titanium frit as a main titanium source, and titanium sphene powder and titanium white are introduced, so that a large number of titanium sphene crystals are obtained under the condition of rapid sintering of the glaze, and the particle size of the titanium sphene crystals is mainly 300-2000 nm.
The glaze gloss of the high-reflection heat-insulation ceramic glaze after firing is only 3-30 degrees, so that light pollution caused by light reflection is effectively avoided, and the application requirements of the ceramic tile on a roof and an outer wall are met.
Specifically, in the preparation raw materials of the high-reflection heat-insulation ceramic glaze, other raw materials can be selected from clay raw materials, quartz, albite, potash feldspar, aluminum oxide, calcite, kaolin, talcum, dolomite, wollastonite, barium carbonate, strontium carbonate, zinc oxide and other materials.
Preferably, the titanite powder has an average particle size of 1-4 μm. The particle size of the titanic sphene powder is not too large or too small, otherwise, the titanic sphene crystals formed after firing are too large or too small.
Preferably, in the titanium frit, the weight percentage is 10 percent or less than that of TiO 2 ≤15%,Al 2 O 3 Less than or equal to 6 percent. If TiO in the titanium frit 2 If the content is too low, a large amount of titanite is not easy to separate out; if Al in the titanium frit 2 O 3 If the content is too high, large-particle titanite is not easily precipitated.
Preferably, in the preparation raw materials of the reflective heat-insulating ceramic glaze, the molar ratio of titanium to calcium is 1:1-1:1.5.
The third aspect of the invention provides a high-reflection heat-insulation ceramic tile, which comprises a green body layer, a ground glaze layer and the high-reflection heat-insulation ceramic glaze layer which are sequentially arranged.
Preferably, the thickness of the blank layer is 3-20 mm; the thickness of the ground coat layer is 0.1-0.2 mm; the thickness of the high-reflection heat-insulation ceramic glaze layer is 0.15-0.4 mm.
According to a fourth aspect of the present invention, there is provided a method for preparing a highly reflective insulating ceramic tile as described above, comprising the steps of:
applying a primer on the green body layer to form a primer layer after firing;
the high-reflection heat-insulating ceramic glaze is coated on the ground coat to form a high-reflection heat-insulating ceramic glaze layer after firing; specifically, pigment can be added into the high-reflection heat-insulation ceramic glaze or patterns can be printed on the surface of the high-reflection heat-insulation ceramic glaze according to the process requirements;
firing at 1170-1230 deg.c for 30-90 min.
Preferably, the chemical composition of the primer comprises, in mass percent: siO (SiO) 2 60%~70%、Al 2 O 3 20%~30%、Na 2 O 3%~5%、K 2 1 to 3 percent of O, 0.5 to 1.5 percent of CaO, 0.5 to 1.5 percent of MgO and 1 to 3 percent of ignition loss.
Example 1
The preparation method of the high-reflection heat-insulation ceramic tile comprises the following steps:
s100, spreading a ground coat on the green body layer to form a ground coat layer after firing;
the chemical composition of the ground coat comprises the following components in percentage by mass: siO (SiO) 2 66%、Al 2 O 3 23%、Na 2 O 4%、K 2 2.5% of O, 1.5% of CaO, 0.5% of MgO and 2.5% of loss on ignition;
s200, coating the high-reflection heat-insulation ceramic glaze on the ground glaze to form a high-reflection heat-insulation ceramic glaze layer after firing;
the preparation raw materials of the high-reflection heat-insulation ceramic glaze comprise the following components in percentage by mass: 50% of titanium frit, 10% of titanium sphene powder, 4% of titanium pigment, 8% of kaolin, 20% of quartz, 5% of calcite and 3% of talcum;
specifically, the average grain diameter of the titanite powder is 2 mu m;
the chemical components of the titanium frit comprise the following components in percentage by mass:SiO 2 60%、Al 2 O 3 5%、CaO 17%、TiO 2 13.5%、K 2 O 1%、Na 2 O 2.5%、MgO 0.8%、Fe 2 O 3 0.2%;
finally, the molar ratio of titanium to calcium in the high-reflection heat-insulation ceramic glaze is 1:1.37;
s300, firing, wherein the highest firing temperature is 1230 ℃ and the firing period is 30 minutes;
the thickness of each layer of the high-reflection heat-insulation ceramic tile is measured after firing, wherein the thickness of the green body layer is 10mm, the thickness of the ground coat layer is 0.15mm, and the thickness of the high-reflection heat-insulation glaze layer is 0.28mm.
Example 2
The preparation method of the high-reflection heat-insulation ceramic tile comprises the following steps:
s100, spreading a ground coat on the green body layer to form a ground coat layer after firing;
the chemical composition of the ground coat comprises the following components in percentage by mass: siO (SiO) 2 62%、Al 2 O 3 30%、Na 2 O 5%、K 2 O1%, caO 0.5%, mgO 0.5% and loss on ignition 1%;
s200, coating the high-reflection heat-insulation ceramic glaze on the ground glaze to form a high-reflection heat-insulation ceramic glaze layer after firing;
the preparation raw materials of the high-reflection heat-insulation ceramic glaze comprise the following components in percentage by mass: 40% of titanium frit, 20% of titanium sphene powder, 7.5% of titanium dioxide, 6% of kaolin, 12% of quartz, 5% of potassium feldspar, 8% of dolomite and 1.5% of strontium carbonate;
specifically, the average grain size of the titanite powder is 3 mu m;
the chemical components of the titanium frit comprise the following components in percentage by mass: siO (SiO) 2 60.5%、Al 2 O 3 5.5%、CaO 18%、TiO 2 10%、K 2 O 2.3%、Na 2 O 3.1%、MgO 0.4%、Fe 2 O 3 0.2%;
Finally, the molar ratio of titanium to calcium in the high-reflection heat-insulation ceramic glaze is 1:1.12;
s300, firing, wherein the highest firing temperature is 1170 ℃ and the firing period is 90 minutes;
the thickness of each layer of the high-reflection heat-insulation ceramic tile is measured after firing, wherein the thickness of the green body layer is 20mm, the thickness of the ground coat layer is 0.13mm, and the thickness of the high-reflection heat-insulation glaze layer is 0.4mm.
Example 3
The preparation method of the high-reflection heat-insulation ceramic tile comprises the following steps:
s100, spreading a ground coat on the green body layer to form a ground coat layer after firing;
the chemical composition of the ground coat comprises the following components in percentage by mass: siO (SiO) 2 61.5%、Al 2 O 3 28.5%、Na 2 O 4.5%、K 2 1.5% of O, 1% of CaO, 1.5% of MgO and 1.5% of loss on ignition;
s200, coating the high-reflection heat-insulation ceramic glaze on the ground glaze to form a high-reflection heat-insulation ceramic glaze layer after firing;
the preparation raw materials of the high-reflection heat-insulation ceramic glaze comprise the following components in percentage by mass: 30% of titanium frit, 30% of titanium sphene powder, 6% of titanium pigment, 6% of kaolin, 10% of quartz, 5% of albite, 12% of wollastonite and 1% of barium carbonate;
specifically, the average grain size of the titanite powder is 4 mu m;
the chemical components of the titanium frit comprise the following components in percentage by mass: siO (SiO) 2 60%、Al 2 O 3 6%、CaO 18%、TiO 2 10%、K 2 O 2.3%、Na 2 O 3.1%、MgO 0.4%、Fe 2 O 3 0.2%;
Finally, the molar ratio of titanium to calcium in the high-reflection heat-insulation ceramic glaze is 1:1.23;
s300, firing, wherein the highest firing temperature is 1200 ℃ and the firing period is 50 minutes;
the thickness of each layer of the high-reflection heat-insulation ceramic tile is measured after firing, wherein the thickness of the green body layer is 3mm, the thickness of the ground coat layer is 0.1mm, and the thickness of the high-reflection heat-insulation glaze layer is 0.15mm.
Example 4
The preparation method of the high-reflection heat-insulation ceramic tile comprises the following steps:
s100, spreading a ground coat on the green body layer to form a ground coat layer after firing;
the chemical composition of the ground coat comprises the following components in percentage by mass: siO (SiO) 2 66%、Al 2 O 3 23%、Na 2 O 4%、K 2 2.5% of O, 1.5% of CaO, 0.5% of MgO and 2.5% of loss on ignition;
s200, coating the high-reflection heat-insulation ceramic glaze on the ground glaze to form a high-reflection heat-insulation ceramic glaze layer after firing;
the preparation raw materials of the high-reflection heat-insulation ceramic glaze comprise the following components in percentage by mass: 45% of titanium frit, 15% of titanium sphene powder, 5% of titanium dioxide, 9% of kaolin, 10% of quartz, 10% of calcite, 3% of talcum, 2% of zinc oxide and 1% of aluminum oxide;
specifically, the average grain diameter of the titanite powder is 1 mu m;
the chemical components of the titanium frit comprise the following components in percentage by mass: siO (SiO) 2 58%、Al 2 O 3 4%、CaO 19%、TiO 2 15%、K 2 O 1.5%、Na 2 O 2%、MgO 0.3%、Fe 2 O 3 0.2%;
Finally, the molar ratio of titanium to calcium in the high-reflection heat-insulation ceramic glaze is 1:1.47;
s300, firing, wherein the highest firing temperature is 1230 ℃ and the firing period is 30 minutes;
the thickness of each layer of the high-reflection heat-insulation ceramic tile is measured after firing, wherein the thickness of the green body layer is 12mm, the thickness of the ground coat layer is 0.2mm, and the thickness of the high-reflection heat-insulation glaze layer is 0.3mm.
Comparative example 1
The preparation method of the ceramic tile is different from that of the embodiment 1 in that: the preparation raw materials of the high-reflection heat-insulation ceramic glaze are different;
the preparation raw materials of the high-reflection heat-insulation ceramic glaze comprise the following components in percentage by mass: 50% of titanium frit, 4% of titanium dioxide, 8% of kaolin, 30% of quartz, 5% of calcite and 3% of talcum;
finally, the molar ratio of titanium to calcium in the high-reflection heat-insulation ceramic glaze is 1:1.58;
the highest sintering temperature is 1200 ℃ and the sintering period is 50 minutes during sintering;
the thickness of each layer of the high-reflection heat-insulation ceramic tile is measured after firing, wherein the thickness of the green body layer is 10mm, the thickness of the ground coat layer is 0.14mm, and the thickness of the high-reflection heat-insulation glaze layer is 0.29mm.
Comparative example 2
The preparation method of the ceramic tile is different from that of the embodiment 1 in that: the chemical components of the titanium frit are different;
the chemical components of the titanium frit comprise the following components in percentage by mass: calculated by mass percent, siO 2 57.7%、Al 2 O 3 9%、CaO 17.6%、TiO 2 8%、K 2 O 2.5%、Na 2 O 3.5%、MgO 1.5%、Fe 2 O 3 0.2%;
Finally, the molar ratio of titanium to calcium in the high-reflection heat-insulation ceramic glaze is 1:1.68;
the highest firing temperature is 1230 ℃ and the firing period is 30 minutes during firing;
the thickness of each layer of the high-reflection heat-insulation ceramic tile is measured after firing, wherein the thickness of the green body layer is 10mm, the thickness of the ground coat layer is 0.15mm, and the thickness of the high-reflection heat-insulation glaze layer is 0.28mm.
Comparative example 3
The preparation method of the ceramic tile is different from that of the embodiment 1 in that: the high-reflection heat insulation ceramic glaze is different in preparation raw materials;
the preparation raw materials of the high-reflection heat-insulation ceramic glaze comprise the following components in percentage by mass: 20% of titanium frit, 40% of titanium sphene powder, 6% of titanium pigment, 6% of kaolin, 10% of quartz, 5% of albite, 12% of wollastonite and 1% of barium carbonate;
wherein the average grain diameter of the titanite powder is 3 mu m;
the chemical components of the titanium frit comprise the following components in percentage by mass: calculated by mass percent, siO 2 58%、Al 2 O 3 4%、CaO 17%、TiO 2 15%、K 2 O 1.9%、Na 2 O 2.7%、MgO 1.2%、Fe 2 O 3 0.2%;
Finally, the molar ratio of titanium to calcium in the high-reflection heat-insulation ceramic glaze is 1:1.18;
the highest sintering temperature is 1200 ℃ and the sintering period is 50 minutes during sintering;
the thickness of each layer of the high-reflection heat-insulation ceramic tile is measured after firing, wherein the thickness of the green body layer is 3mm, the thickness of the ground coat layer is 0.1mm, and the thickness of the high-reflection heat-insulation glaze layer is 0.15mm.
Comparative example 4
The preparation method of the ceramic tile is different from that of the embodiment 1 in that: the high-reflection heat insulation ceramic glaze is different in preparation raw materials;
the preparation raw materials of the high-reflection heat-insulation ceramic glaze comprise the following components in percentage by mass: 60% of titanium frit, 10% of titanium sphene powder, 2% of titanium pigment, 8% of kaolin, 12% of quartz, 5% of calcite and 3% of talcum;
finally, the molar ratio of titanium to calcium in the high-reflection heat-insulation ceramic glaze is 1:1.58;
the highest firing temperature is 1230 ℃ and the firing period is 30 minutes during firing;
the thickness of each layer of the high-reflection heat-insulation ceramic tile is measured after firing, wherein the thickness of the green body layer is 10mm, the thickness of the ground coat layer is 0.15mm, and the thickness of the high-reflection heat-insulation glaze layer is 0.28mm.
The glaze brightness and glossiness of examples 1-4 and comparative examples 1-4 were measured;
the reflection performance of the high-reflection heat insulation ceramic glaze layer on all-band sunlight is tested according to GB/T31389-2015;
analyzing the crystalline phase composition of the high-reflection heat-insulation ceramic glaze layer by an X-ray diffractometer;
analyzing the size of crystal grains in the high-reflection heat-insulation ceramic glaze layer by an electronic scanning electron microscope, and carrying out particle size distribution statistics by Nano Measurer software;
the corresponding test results are as follows:
titanium sphene content | Solar reflectance | Visible light reflectance | Near infrared reflectance | Lightness L | Gloss level | |
Example 1 | 30% | 0.93 | 0.93 | 0.94 | 95.8 | 10 |
Example 2 | 40% | 0.95 | 0.95 | 0.96 | 96.3 | 3 |
Example 3 | 45% | 0.90 | 0.91 | 0.90 | 95.2 | 30 |
Example 4 | 35% | 0.92 | 0.93 | 0.91 | 95.6 | 18 |
Comparative example 1 | 21% | 0.83 | 0.86 | 0.8 | 93.6 | 25 |
Comparative example 2 | 23% | 0.84 | 0.87 | 0.83 | 93.8 | 8 |
Comparative example 3 | 52% | 0.85 | 0.88 | 0.82 | 94.1 | 2 |
Comparative example 4 | 26% | 0.85 | 0.88 | 0.82 | 94.2 | 50 |
According to the test results, the high-reflection heat-insulation ceramic bricks prepared in the examples 1-4 have high reflectance to sunlight in all wave bands, are all above 0.90 and have low glossiness. Fig. 1 is an XRD pattern of example 1, and it was confirmed by X-ray diffractometry that the crystal phase of the highly reflective insulating ceramic glaze layer was mainly granular titanium sphene. FIG. 2 is an SEM image of example 1, showing the particle size distribution of titanium sphene crystals according to the statistics: about 28.5% of the titanium sphene crystals with the particle size of 300-600 nm, about 52.4% of the titanium sphene crystals with the particle size of 600-900 nm, about 13.6% of the titanium sphene crystals with the particle size of 900-1200 nm, about 3.8% of the titanium sphene crystals with the particle size of 1200-1500 nm, and about 1.7% of the titanium sphene crystals with the particle size of 1500-2000 nm. Fig. 3 is a graph of reflectivity of example 1, and it can be seen from the graph that the highly reflective insulating ceramic glaze layer has higher reflectivity for sunlight with a wavelength of 300-2500 nm, and according to the formula (see GB/T31389-2015), the solar reflectance in example 1 can reach 0.93, the visible light reflectance reaches 0.93, and the near infrared reflectance reaches 0.94.
In addition, the particle size distribution of the titanium sphene crystals in example 2 is: about 21.3% of the titanic sphene crystals with the particle size of 300-600 nm, about 60.9% of the titanic sphene crystals with the particle size of 600-900 nm, about 14.6% of the titanic sphene crystals with the particle size of 900-1200 nm, about 2.1% of the titanic sphene crystals with the particle size of 1200-1500 nm, and about 1.1% of the titanic sphene crystals with the particle size of 1500-2000 nm.
The particle size distribution of the titanite crystals in example 3 is: about 16.3% of the titanium sphene crystals with the particle size of 300-600 nm, about 50.3% of the titanium sphene crystals with the particle size of 600-900 nm, about 20.6% of the titanium sphene crystals with the particle size of 900-1200 nm, about 8.3% of the titanium sphene crystals with the particle size of 1200-1500 nm, and about 4.5% of the titanium sphene crystals with the particle size of 1500-2000 nm.
The particle size distribution of the titanite crystals in example 4 is: about 27.6% of the titanium sphene crystals with the particle size of 300-600 nm, about 50.8% of the titanium sphene crystals with the particle size of 600-900 nm, about 13.8% of the titanium sphene crystals with the particle size of 900-1200 nm, about 5.3% of the titanium sphene crystals with the particle size of 1200-1500 nm, and about 2.5% of the titanium sphene crystals with the particle size of 1500-2000 nm.
FIG. 4 is a SEM image of comparative example 1, in which it is seen that the particle size distribution of the titaniferous sphene crystals in the highly reflective insulating ceramic glaze layer of comparative example 1 is 100 to 500nm, wherein the number of titaniferous sphene crystals having a particle size of 100 to 300nm is about 81.5% and the number of titaniferous sphene crystals having a particle size of 300 to 500nm is about 18.5%. Fig. 5 is a graph of reflectivity of comparative example 1, from which it can be seen that the highly reflective insulating ceramic glaze layer of comparative example 1 has a higher reflectivity for sunlight having a small wavelength, but has a lower reflectivity for sunlight having a wavelength greater than 500nm, and the solar reflectance in comparative example 1 is only 0.83, the visible light reflectance is only 0.86, and the near infrared reflectance is only 0.8, according to the formula, indicating that the highly reflective insulating ceramic glaze layer has a lower solar reflectance for a portion of wavelengths when the titanium sphene crystal content is small and the particle size range is too small. The reason why the particle size of the titanite crystals was concentrated to 100 to 500nm was that the titanite powder was not used as a preparation raw material in comparative example 1, resulting in the lack of larger-particle titanite crystals in the glaze layer.
In comparative example 2, the titanium frit thereof had Al 2 O 3 The content is larger than the protection range of the invention, and the TiO is 2 The content of the titanium sphene crystals was less than the protection range of the present invention, and the particle size distribution of the titanium sphene crystals in comparative example 2 was analyzed to be 100 to 1000nm, wherein the number of the titanium sphene crystals having a particle size of 100 to 300nm was about 25.3%, the number of the titanium sphene crystals having a particle size of 300 to 600nm was about 37.5%, and the number of the titanium sphene crystals having a particle size of 600 to 1000nm was about 37.2%. For solar light having a wavelength of more than 1000nm, the reflectance thereof was low and the titanite content thereof was only 23%, so that the solar reflectance, the visible light reflectance and the near infrared reflectance of comparative example 2 were significantly inferior to those of examples 1 to 4. As can be reflected from comparative example 2, tiO in the titanium frit 2 Too low content of Al 2 O 3 When the content is too high, large particles are not easy to be separated outTitanium sphene crystals of (2). The reason for this is: the titanium frit has strong melting capability at high temperature, most titanium dioxide and titanium sphene powder can be melted, ti reacts with Ca, si and O elements in the eutectic to generate titanium sphene crystals, if Al in the titanium frit 2 O 3 Too high a content of (B) may result in excessive viscosity of the eutectic, thereby adversely affecting precipitation and growth of titanite crystals.
In comparative example 3, in which the content of the titanium frit is less than the protective range of the present invention and the content of the titanium sphene powder is greater than the protective range of the present invention, the titanium sphene content of comparative example 3 was higher than examples 1 to 4, and the particle size distribution of the titanium sphene crystals of comparative example 3 was 500 to 4000nm, wherein the number of titanium sphene crystals having a particle size of 500 to 900nm was about 23.5%, the number of titanium sphene crystals having a particle size of 900 to 1200nm was about 35.7%, the number of titanium sphene crystals having a particle size of 1200 to 1500nm was about 17.2%, the number of titanium sphene crystals having a particle size of 1500 to 2000nm was about 13.4%, and the number of titanium sphene crystals having a particle size of 2000 to 4000nm was about 10.2%, by analysis. This means that too much titanium sphene powder and too little titanium frit will result in too much large size titanium sphene crystals and insufficient small size titanium sphene crystals in the glaze. The reason for this is: the amount of the titanium frit is insufficient, the content of the eutectic is low, the melting capability is weak, and the titanium sphene powder is limited to be melted, so that the grain size of the titanium sphene crystal in the glaze layer is larger.
In comparative example 4, the content of the titanium frit was greater than the protection range of the present invention, and it was analyzed that the particle size distribution of the titanium sphene crystals in comparative example 4 was 100 to 1000nm, wherein the number of titanium sphene crystals having a particle size of 100 to 300nm was about 33.5%, the number of titanium sphene crystals having a particle size of 300 to 600nm was about 38.3%, and the number of titanium sphene crystals having a particle size of 600 to 1000nm was about 28.2%. This means that when the amount of the titanium frit is too large, the particle size of the precipitated titanium sphene crystals becomes too small. The reason for this is: when the content of the titanium frit is too high, the melting capacity of the eutectic is strong, thereby being unfavorable for the growth of titanium sphene crystals.
It will be understood that equivalents and modifications will occur to those skilled in the art in light of the present invention and their spirit, and all such modifications and substitutions are intended to be included within the scope of the present invention as defined in the following claims.
Claims (6)
1. The high-reflection heat-insulation ceramic glaze layer is characterized in that the titanium sphene crystal content in the high-reflection heat-insulation ceramic glaze layer is 30-45% by mass percent; in the titanic sphene crystals, according to the particle number, the particle size of 15% -35% of titanic sphene crystals is uniformly distributed at 300-600 nm, the particle size of 50% -70% of titanic sphene crystals is uniformly distributed at 600-900 nm, the particle size of 5% -25% of titanic sphene crystals is uniformly distributed at 900-1200 nm, the particle size of 2% -10% of titanic sphene crystals is uniformly distributed at 1200-1500 nm, and the particle size of 1% -5% of titanic sphene crystals is uniformly distributed at 1500-2000 nm; the high-reflection heat-insulation ceramic glaze layer is prepared by firing high-reflection heat-insulation ceramic glaze, and the preparation raw materials of the high-reflection heat-insulation ceramic glaze comprise the following components in percentage by mass: 30-50% of titanium frit, 10-30% of titanium sphene powder and 4-7.5% of titanium white; the average grain diameter of the titanite powder is 1-4 mu m; in the titanium frit, tiO is 10 percent or less by mass percent 2 ≤15%,Al 2 O 3 Less than or equal to 6 percent; the glaze gloss of the high-reflection heat-insulation ceramic glaze layer is 3-30 degrees.
2. The high-reflection heat-insulation ceramic glaze layer according to claim 1, wherein the molar ratio of titanium to calcium in the preparation raw material of the high-reflection heat-insulation ceramic glaze is 1:1-1:1.5.
3. A high-reflection heat-insulation ceramic tile, which is characterized by comprising a green body layer, a ground glaze layer and the high-reflection heat-insulation ceramic glaze layer according to any one of claims 1-2 which are sequentially arranged.
4. The high reflective insulation ceramic tile according to claim 3, wherein the thickness of the green layer is 3-20 mm; the thickness of the ground coat layer is 0.1-0.2 mm; the thickness of the high-reflection heat-insulation ceramic glaze layer is 0.15-0.4 mm.
5. A method for preparing a ceramic tile, characterized in that it comprises the steps of:
applying a primer on the green body layer to form a primer layer after firing;
coating high-reflection heat-insulation ceramic glaze on the ground glaze to form a high-reflection heat-insulation ceramic glaze layer after firing;
firing at 1170-1230 deg.c for 30-90 min.
6. The method of producing ceramic tiles of claim 5, wherein the primer comprises, in mass percent: siO (SiO) 2 60%~70%、Al 2 O 3 20%~30%、Na 2 O 3%~5%、K 2 1 to 3 percent of O, 0.5 to 1.5 percent of CaO, 0.5 to 1.5 percent of MgO and 1 to 3 percent of ignition loss.
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