CN113416521A - Daytime radiation refrigeration material and preparation method thereof - Google Patents
Daytime radiation refrigeration material and preparation method thereof Download PDFInfo
- Publication number
- CN113416521A CN113416521A CN202110865015.4A CN202110865015A CN113416521A CN 113416521 A CN113416521 A CN 113416521A CN 202110865015 A CN202110865015 A CN 202110865015A CN 113416521 A CN113416521 A CN 113416521A
- Authority
- CN
- China
- Prior art keywords
- particles
- daytime
- sintering
- raw materials
- radiation refrigeration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/06—Other methods of shaping glass by sintering, e.g. by cold isostatic pressing of powders and subsequent sintering, by hot pressing of powders, by sintering slurries or dispersions not undergoing a liquid phase reaction
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/14—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silica
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5445—Particle size related information expressed by the size of the particles or aggregates thereof submicron sized, i.e. from 0,1 to 1 micron
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/602—Making the green bodies or pre-forms by moulding
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a daytime radiation refrigeration material, which is formed by sintering raw materials, wherein the raw materials comprise at least one inorganic particle with the size of 0.1-100 mu m in one or more directions; wherein the mass percentage of the inorganic particles in the raw materials is not less than 50%. The invention also discloses a method for preparing the daytime radiation refrigeration material. The daytime radiation refrigeration material provided by the invention has very high sunlight reflectivity and infrared band emissivity in an atmospheric window, and can realize high-efficiency radiation refrigeration effect; meanwhile, the daytime radiation refrigeration material is an all-inorganic block material, has good mechanical strength and durability, and can be applied to building materials such as tiles and ceramic tiles.
Description
Technical Field
The invention relates to the field of materials, in particular to a daytime radiation refrigeration material and a preparation method thereof.
Background
The intensification of the greenhouse effect makes the demand of cooling and refrigeration sharply increased in the modern society. Daytime radiation refrigeration realizes cooling and refrigeration by reflecting sunlight and radiating heat to extremely cold (0-3K) space through an atmosphere transparent window, and is concerned by the industry in recent years because energy consumption is not needed. Current industrialized day-to-day radiant refrigeration products mainly include: organic polymer-based film products, organic and inorganic composite coating products. However, existing products containing organic matter still have some disadvantages: the polymer-based film has higher requirements on construction conditions, and the construction labor cost is high; the organic polymer or the organic binder material in the coating of the paint can turn yellow and become brittle when exposed outdoors for a long time, so that the radiation refrigeration effect is poor or even no refrigeration effect is caused.
Therefore, there is a need for improvements in existing daytime radiant refrigeration materials.
Disclosure of Invention
The invention aims to provide a daytime radiation refrigeration material and a preparation method thereof, the daytime radiation refrigeration material is an inorganic block material, has high sunlight reflectivity and high emissivity of an atmosphere transparent window, and can be applied in the forms of building tiles, outdoor floor tiles, external wall tiles and scenic spot stool and chair tiles.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
a daytime radiation refrigerating material is formed by sintering raw materials, wherein the raw materials comprise at least one inorganic particle with the size of 0.1-100 mu m in one or more directions.
Wherein the mass percentage of the inorganic particles in the raw material is not less than 50%. The beneficial effects are that the inorganic particles with the size of 0.1-100 mu m are selected, so that the inorganic particles have good sunlight reflectivity and medium infrared band emissivity, and the sunlight transmittance in the daytime is effectively reduced; the daytime radiation refrigeration material formed by the inorganic particles can avoid the problem of denaturation or aging of organic matters exposed outdoors for a long time; and the daytime radiation refrigeration material has longer service life and constant refrigeration effect.
In one or more embodiments of the invention, the inorganic particles have an average solar absorptance of less than 0.2 and an average atmospheric transparency window emittance of greater than 0.8. The beneficial effects are that, by selecting the inorganic particles, the reflectivity of the prepared daytime radiation refrigerating material with the block structure to sunlight reaches more than 80%, and a better cooling refrigerating effect is realized.
In one or more embodiments of the present invention, the inorganic particles have an average solar absorptance of less than 0.1 and an average atmospheric transparency window emittance of greater than 0.9. The beneficial effects are that, by optimizing the inorganic particles, the reflectivity of the prepared daytime radiation refrigerating material with the block structure to sunlight reaches more than 90%, and the cooling and refrigerating effects are further improved.
In one or more embodiments of the present invention, the inorganic particles include metal oxide particles and non-metal oxide particles, and the thickness of the daytime radiation refrigerating material formed by the inorganic particles is 1000 μm at the minimum. The solar radiation refrigeration material has the beneficial effects that the lower transmittance of the solar radiation refrigeration material to sunlight can be realized by limiting the thickness of the solar radiation refrigeration material, so that the temperature reduction of the solar radiation refrigeration material is facilitated.
In one or more embodiments of the present invention, the inorganic particles include one or more of silica particles, calcium carbonate particles, glass microsphere particles, glass fiber particles, zirconia particles, barium sulfate particles, and alumina particles. The radiation refrigeration material has the beneficial effects that the light absorptivity of the inorganic particles is less than 0.2 (20%), and the emissivity of the atmosphere transparent window is greater than 0.8 (80%), so that the radiation refrigeration material integrally shows high-efficiency daytime radiation performance.
In one or more embodiments of the present invention, the inorganic particles are glass microsphere particles having a hollow structure with a particle size of 1-50 μm and a wall thickness of 0.25-5 μm. The glass microsphere particle has the beneficial effects that the inorganic particles are glass microsphere particles with hollow structures, so that more reflecting interfaces can be manufactured, and more efficient sunlight reflection can be realized by using smaller material thickness.
In one or more embodiments of the present invention, the inorganic particles are formed by mixing glass fiber particles and glass microsphere particles having a solid structure. The method has the beneficial effects that the inorganic particles with solid structures are adopted, so that the compressive strength of the daytime radiation refrigerating material can be improved to a certain extent. The preparation method has the beneficial effects that the preparation method is simple by adopting the sintering process, and non-inorganic particles can be removed in the sintering process, so that the preparation of the pure inorganic daytime radiation refrigeration material is facilitated.
The invention also provides a preparation method of the daytime radiation refrigeration material, which comprises the following steps:
s1: weighing raw materials with set mass, wherein the raw materials comprise at least one inorganic particle with the size of 0.1-100 mu m in one or more directions;
s2: and (3) randomly stacking or pressing the raw materials to form, and then sintering at high temperature to form the daytime radiation refrigeration material with a block structure.
In one or more embodiments of the present invention, the sintering temperature of the high-temperature sintering is 500 to 3000 ℃.
In one or more embodiments of the present invention, the high-temperature sintering is a step sintering.
In one or more embodiments of the present invention, the raw material further comprises a polymerization agent, and the polymerization agent comprises polyethylene glycol or polyvinyl alcohol.
Compared with the prior art, the daytime radiation refrigeration material provided by the invention has the advantages that the inorganic particles with the size of 0.1-100 mu m are selected as raw materials, the sunlight reflectivity and the atmospheric transparent window emissivity are very high, and the efficient radiation refrigeration effect can be realized; meanwhile, the daytime radiation refrigeration material is an all-inorganic block material, has good mechanical strength and durability, and does not turn yellow or become brittle; and the preparation method is simple, and can be applied to building materials such as tiles, ceramic tiles and the like.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 shows the visible light transmittance of ceramic sheets made of daytime radiation refrigeration materials with different thicknesses according to an embodiment of the present invention.
Detailed Description
The following detailed description of the present invention is provided in connection with specific embodiments thereof, and it should be understood that the scope of the present invention is not limited by the specific embodiments.
In the following description, "%" and "part" representing amounts are based on weight unless otherwise specified. Unless otherwise indicated, all numbers expressing feature sizes, quantities, and physical characteristics used in the specification and claims are to be understood as being modified in all instances by the term "about". Accordingly, unless indicated to the contrary, the numerical parameters set forth in the foregoing specification and attached claims are approximations that can be suitably varied by those skilled in the art in seeking to obtain the desired properties utilizing the teachings disclosed herein. The use of numerical ranges by endpoints includes all numbers within that range and any range within that range, for example, 1 to 5 includes 1, 1.2, 1.4, 1.55, 2, 2.75, 3, 3.80, 4, and 5, and the like.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus; the term "preferred" refers to a preferred alternative, but is not limited to only the selected alternative.
The invention provides a daytime radiation refrigerating material, which is formed by sintering raw materials, wherein the raw materials comprise at least one inorganic particle with the size of 0.1-100 mu m in one or more directions; wherein the mass percentage of the inorganic particles in the raw material is not less than 50%.
In particular, the inorganic particles have low solar absorption, high emissivity of the atmospheric transparent window. Illustratively, the inorganic particles have a light absorptivity of less than 0.2 (e.g., average light absorptivity of 0.03, 0.12, 0.15, etc.), and an average emissivity of the atmosphere transparent window of greater than 0.8 (e.g., average emissivity of 0.82, 0.9, 0.95, etc.), such that the radiation refrigeration material as a whole exhibits efficient daytime radiation performance.
The daytime radiation refrigeration material is a block body formed by sintering after the raw materials are randomly stacked or pressed and molded. Specifically, the raw materials are pressed and molded under the pressure of 1-100 MPa, and then high-temperature sintering is carried out, so that the daytime radiation refrigeration material with high mechanical strength is obtained.
Specifically, the raw material may be entirely composed of inorganic particles having a size of 0.1 to 100 μm in one or more directions, and may include other raw materials than the aforementioned inorganic particles as long as the aforementioned inorganic particles are present in the raw material in a mass percentage of not less than 50%, that is, the purity of the inorganic particles is not less than 50%. For example, the mass percentage of the inorganic particles in the raw material may be set to 60%, 75%, 85%, 90% or more by mass.
The material of the inorganic particles may be one or more of silica particles, calcium carbonate particles, glass microsphere particles, glass fiber particles, zirconia particles, barium sulfate particles, and alumina particles. For example, the inorganic particles may be all silica particles, or may be mixed inorganic particles in which silica particles and zirconia particles are combined.
The inorganic particles may be of a solid structure or a hollow core-shell structure. In one embodiment, the daytime radiation refrigerating material is inorganic particles with a hollow core-shell structure. The hollow structure can provide superior solar reflection performance compared to a solid structure with the same material, the same shape, and the same particle size, considering that the hollow structure can make more reflective interfaces, thereby realizing more efficient solar reflection with smaller material thickness.
The shape of the inorganic particles in the examples of the present invention is not particularly limited, and the inorganic particles may be spherical, rod-like, block-like or fibrous, or may be other regular or irregular shapes as long as the size in at least one direction is 0.1 to 100 μm.
In a preferred embodiment of the present invention, the inorganic particles are silica particles having a particle size of 0.1 to 2 μm.
In a preferred embodiment of the present invention, the inorganic particles are hollow glass microsphere particles having a particle size of 1-50 μm and a wall thickness of 0.25-25 μm.
In a preferred embodiment of the present invention, the inorganic particles are formed by mixing glass fiber particles and glass microsphere particles having a solid structure.
The invention also provides a preparation method of the daytime radiation refrigerating material, and the daytime radiation refrigerating material can be used as building tiles, outdoor floor tiles, external wall tiles, outdoor chair and stool tiles and the like. The preparation method comprises the following steps:
s1: weighing raw materials with set mass, wherein the raw materials comprise at least one inorganic particle with the size of 0.1-100 mu m in one or more directions;
s2: and (3) randomly stacking or pressing the raw materials to form, and then sintering at high temperature to form the daytime radiation refrigeration material with a block structure. Alternatively, the block structure may be square, spherical, pentagonal, hexagonal, or any other shape. The size of the block structure is specifically set according to the applied scenario, for example, set as: the length is any other value such as 40cm, 60cm, 80cm, etc.
Wherein the high-temperature sintering temperature is 500-3000 ℃; the specific sintering temperature can be adjusted according to the selected raw materials.
The high-temperature sintering adopts a sectional sintering mode, and the sectional sintering is adopted to control the shrinkage speed of the raw materials in the heating process and prevent the defect that the final sintered block material forms too much due to too large shrinkage of the raw materials when the raw materials reach the melting temperature of the raw materials too fast.
The invention is further illustrated by the following specific examples:
example 1
Weighing 200g of silicon dioxide particles with the particle size of 0.1-2 mu m, wherein the purity of the silicon dioxide particles can be more than 50%; pressing the silica particles into a block with the size of 120mm multiplied by 6mm (length, width and thickness directions, the same below) by the pressure of 50 MPa; and then placing the material in a high-temperature sintering furnace to prepare the daytime radiation refrigeration material with a block structure in a sectional sintering mode. In this example, the temperature was first raised uniformly to 600 ℃ over 3 hours and held at 600 ℃ for 1 hour; then uniformly heating the mixture from 600 ℃ to 1600 ℃ after 5 hours; and finally, sintering the mixture at a high temperature of 1600 ℃ for 2 hours, and naturally cooling to prepare the daytime radiation refrigeration material with a block structure of 110mm in length, 110mm in width and 5mm in thickness. According to the daytime radiation refrigeration material provided by the embodiment of the invention, the silicon dioxide particles with the particle size of 0.1-2 μm have very high sunlight reflectivity and high atmosphere transparent window emissivity, so that the high-efficiency radiation refrigeration effect of a block structural material can be realized; meanwhile, the daytime radiation refrigeration material is an all-inorganic block material, has good mechanical strength and durability, and does not turn yellow or become brittle; and the preparation method is simple, and can be applied to building materials such as tiles, ceramic tiles and the like.
Example 2
In this example, the sintered raw material was selected to have a hollow core-shell structure, and the particle size of the hollow core-shell structure was smaller than that in example 1. Weighing 100g of hollow glass microsphere particles with the particle size of 1-50 mu m and the wall thickness of 0.25-25 mu m, wherein the purity of the hollow glass microsphere particles is more than 60%; injecting the hollow glass microsphere particles into a corundum crucible with the size of 120mm multiplied by 10mm and flattening; then placing the mixture in a high-temperature sintering furnace, uniformly heating the mixture to 400 ℃ for 1 hour, and keeping the mixture at the temperature of 400 ℃ for 1 hour; then uniformly heating the mixture from 400 ℃ to 650 ℃ after 1 hour; and finally, sintering at the high temperature of 650 ℃ for 3 hours, and naturally cooling to obtain the daytime radiation refrigeration material with the block structure of 110mm multiplied by 4 mm. Compared with the embodiment 1, the thickness of the block material obtained by sintering the hollow core-shell structure with small particle size is smaller.
Example 3
In this example, two different sizes of materials were selected for the raw material for sintering. Weighing 200g of glass fiber particles with the length of 50-100 mu m and the diameter of 0.1-10 mu m and 200g of solid glass particles with the particle size of 0.01 mu m, and ball-milling for 2 hours at the revolution of 200 revolutions per minute by adopting a star ball mill to obtain a raw material for sintering; injecting the raw materials into a corundum crucible with the size of 200mm multiplied by 10mm and flattening; then placing the mixture in a high-temperature sintering furnace, uniformly heating the mixture to 400 ℃ for 1 hour, and keeping the mixture at the temperature of 400 ℃ for 1 hour; then uniformly heating the mixture from 400 ℃ to 700 ℃ after 1 hour; and finally, sintering at the high temperature of 700 ℃ for 3 hours, and naturally cooling to obtain the daytime radiation refrigeration material with the block structure of 180mm multiplied by 5 mm.
Example 4
In order to increase the interaction force between particles, i.e., to increase the compactness of the sintered block, it is considered that a certain gap exists between the raw materials during the sintering process. In the embodiment of the application, the polymerizing agent is added in the raw material sintering process. In the embodiment, 500g of calcium carbonate particles with the particle size of 0.1-2 μm and 50g of polyethylene glycol (molecular weight of 400) serving as a polymerization agent are weighed and mixed, and then a star ball mill is adopted to perform ball milling for 2 hours at the revolution of 300 revolutions per minute, so as to obtain a raw material for sintering; pressing the raw materials into 400mm multiplied by 1.5mm under the pressure of 40 MPa; then placing the mixture in a high-temperature sintering furnace, uniformly heating the mixture to 450 ℃ for 1 hour, and keeping the mixture at the temperature of 450 ℃ for 2 hours; then uniformly heating the mixture from 450 ℃ to 1350 ℃ after 5 hours, finally sintering the mixture at the high temperature of 1350 ℃ for 2 hours, and naturally cooling the mixture to obtain the daytime radiation refrigeration material with the block structure of 350mm multiplied by 1 mm. In the embodiment of the application, the organic polymerization agent is added at the initial stage of sintering, and the formation of the daytime radiation refrigeration material with a block structure can be realized at a later stage by adopting a lower temperature, so that the reduction of energy consumption in the sintering process is facilitated. And the organic polymerization agent can be removed under the subsequent sintering high-temperature condition, and the daytime radiation refrigeration material prepared from the pure inorganic material can still be obtained by the embodiment of the invention.
Example 5
The difference from the preceding example 4 is in the choice of the polymerization agent. In the embodiment, 200g of zirconia particles with the particle size of 0.1-2 μm and 10g of polyvinyl alcohol (PVA) are weighed and mixed, and a star ball mill is adopted to perform ball milling for 2 hours at the revolution of 350 r/min, so that a raw material for sintering is obtained; pressing the zirconia particles into a block with the size of 200mm multiplied by 2mm under the pressure of 100 MPa; then placing the mixture in a high-temperature sintering furnace, uniformly heating the mixture to 450 ℃ for 1 hour, keeping the mixture at the temperature of 450 ℃ for 2 hours, uniformly heating the mixture to 1500 ℃ for 5 hours, sintering the mixture at the temperature of 1500 ℃ for 2 hours, uniformly heating the mixture to 2700 ℃ for 6 hours, finally performing heat preservation sintering at 2700 ℃ for 2 hours, and naturally cooling the mixture to obtain the daytime radiation refrigeration material with the block structure of 185mm multiplied by 1.5mm in size. As is clear from a comparison of examples 4 and 5, increasing the sintering temperature and extending the sintering time can increase the strength of the daytime radiation refrigerating material. And the solar reflectivity and the mid-infrared band emissivity (the average emissivity of an atmosphere transparent window) of the daytime radiation refrigeration material can be influenced by different selected particle types. It should be noted that the examples of the present invention only schematically show the types of the polymerization agents, and in other embodiments, other polymerization agents having an adhesive effect, such as polyacrylic acids, celluloses, and glues, may also be used.
Example 6
Weighing 200g of barium sulfate particles with the particle size of 0.1-2 mu m, wherein the purity of the barium sulfate particles is about 90%; pressing the barium sulfate particles into blocks with the size of 150mm multiplied by 200mm multiplied by 3mm under the pressure of 50 MPa; then placing the mixture in a high-temperature sintering furnace, uniformly heating to 900 ℃ after 3 hours, preserving heat for 2 hours at the temperature of 900 ℃, uniformly heating to 1450 ℃ after 1 hour, and finally preserving heat and sintering at 1450 ℃ for 2 hours to form the daytime radiation refrigeration material with a block structure of 140mm multiplied by 180mm multiplied by 2.5mm in size.
Example 7
Weighing 2000g of alumina particles with the particle size of 0.1-2 mu m; pressing the alumina particles into blocks with the size of 650mm multiplied by 9mm under the pressure of 60 MPa; then placing the mixture in a high-temperature sintering furnace, uniformly heating to 1500 ℃ for 4 hours, preserving heat for 2 hours at 1500 ℃, uniformly heating to 2100 ℃ for 4 hours, finally preserving heat for sintering for 2 hours at 2100 ℃, and naturally cooling to prepare the daytime radiation refrigeration material with the block structure of 600mm multiplied by 8mm in size.
Example 8
Weighing 150g of silicon dioxide particles with the particle size of 0.1-2 mu m and 50g of zirconium oxide particles with the particle size of 0.1-2 mu m, mixing, and performing ball milling for 2 hours at the revolution of 350 revolutions per minute by using a star ball mill to obtain a raw material for sintering; pressing the raw materials into blocks with the size of 200 multiplied by 2mm under the pressure of 80 MPa; then placing the mixture in a high-temperature sintering furnace, uniformly heating to 800 ℃ for 4 hours, keeping the temperature at 800 ℃ for 2 hours, uniformly heating to 1600 ℃ for 4 hours, sintering at 1600 ℃ for 2 hours, and naturally cooling to prepare the daytime radiation refrigeration material with a block structure of 185mm multiplied by 1.5mm in size.
Example 9
Weighing 150g of glass fiber particles with the length of 50-100 mu m and the diameter of 0.1-10 mu m, mixing the glass fiber particles with the diameter of 30g of barium sulfate particles with the particle diameter of 0.1-2 mu m, and ball-milling for 2 hours by a star ball mill at the revolution of 200 rpm to obtain a raw material for sintering; pressing the raw materials into blocks with the size of 110mm multiplied by 10mm under the pressure of 30 MPa; then placing the mixture in a high-temperature sintering furnace, uniformly heating the mixture to 400 ℃ for 1 hour, keeping the mixture at the temperature of 400 ℃ for 1 hour, uniformly heating the mixture from 400 ℃ to 700 ℃ for 1 hour, finally sintering the mixture at the temperature of 700 ℃ for 2 hours, and naturally cooling the mixture to obtain the daytime radiation refrigeration material with a block structure of 100mm multiplied by 8 mm.
Example 10
Weighing 150g of glass fiber particles with the length of 50-100 mu m and the diameter of 0.1-10 mu m, mixing the glass fiber particles with the diameter of 30g of alumina particles with the diameter of 0.1-2 mu m, and ball-milling for 2 hours by a star ball mill at the revolution of 200 rpm to obtain a raw material for sintering; pressing the raw materials into blocks of 110mm multiplied by 10mm under the pressure of 30 MPa; then placing the mixture in a high-temperature sintering furnace, uniformly heating the mixture to 400 ℃ for 1 hour, keeping the mixture at the temperature of 400 ℃ for 1 hour, uniformly heating the mixture from 400 ℃ to 700 ℃ for 1 hour, finally sintering the mixture at the temperature of 700 ℃ for 2 hours, and naturally cooling the mixture to obtain the daytime radiation refrigeration material with a block structure of 100mm multiplied by 8 mm.
Example 11
Weighing 150g of glass fiber particles with the length of 50-100 mu m and the diameter of 0.1-10 mu m, mixing the glass fiber particles with the diameter of 30g of zirconia particles with the diameter of 0.1-2 mu m, and ball-milling for 2 hours by a star ball mill at the revolution of 200 rpm to obtain a raw material for sintering; pressing the mixed granules into blocks of 110mm multiplied by 10mm under the pressure of 30 MPa; then placing the mixture in a high-temperature sintering furnace, uniformly heating the mixture to 400 ℃ for 1 hour, keeping the mixture at the temperature of 400 ℃ for 1 hour, uniformly heating the mixture from 400 ℃ to 700 ℃ for 1 hour, finally sintering the mixture at the temperature of 700 ℃ for 2 hours, and naturally cooling the mixture to obtain the daytime radiation refrigeration material with the block structure of 100mm multiplied by 8 mm.
Comparative example 1
Weighing 80g of silicon dioxide particles with the particle size of 0.1-2 mu m and 120g of silicon dioxide particles with the particle size of 120-160 mu m, mixing, and performing ball milling for 2 hours at the revolution of 350 r/min by using a star ball mill to obtain a raw material for sintering; pressing the uniformly mixed raw materials into blocks of 120mm multiplied by 6mm under the pressure of 50 MPa; then placing the mixture in a high-temperature sintering furnace, uniformly heating the mixture to 600 ℃ for 3 hours, keeping the mixture at the temperature of 600 ℃ for 1 hour, uniformly heating the mixture to 1600 ℃ from 600 ℃ for 5 hours, finally sintering the mixture at 1600 ℃ for 2 hours, and naturally cooling the mixture to obtain the daytime radiation refrigeration material with a block structure of 110mm multiplied by 5 mm.
Comparative example 2
Weighing 40g of silicon dioxide particles with the particle size of 0.1-2 microns and 160g of silicon dioxide particles with the particle size of 120-160 microns, mixing, and ball-milling for 2 hours at the revolution of 350 revolutions per minute by adopting a star ball mill to obtain a raw material for sintering; pressing the raw materials into blocks of 120mm multiplied by 6mm under the pressure of 50 MPa; then placing the mixture in a high-temperature sintering furnace, uniformly heating the mixture to 600 ℃ for 3 hours, keeping the mixture at the temperature of 600 ℃ for 1 hour, uniformly heating the mixture to 1600 ℃ from 600 ℃ for 5 hours, finally sintering the mixture at 1600 ℃ for 2 hours, and naturally cooling the mixture to obtain the daytime radiation refrigeration material with a block structure of 110mm multiplied by 5 mm.
Comparative example 3
Weighing 200g of silicon dioxide particles with the particle size of 120-160 mu m; pressing the silica particles into a block of 120mm multiplied by 6mm under the pressure of 50 MPa; then placing the mixture in a high-temperature sintering furnace, uniformly heating the mixture to 600 ℃ for 3 hours, keeping the mixture at the temperature of 600 ℃ for 1 hour, uniformly heating the mixture to 1600 ℃ from 600 ℃ for 5 hours, finally sintering the mixture at 1600 ℃ for 2 hours, and naturally cooling the mixture to obtain the daytime radiation refrigeration material with a block structure of 110mm multiplied by 5 mm.
Comparative example 4
Weighing 200g of silicon dioxide particles with the particle size of 0.01-0.1 mu m; pressing the silica particles into a block of 120mm multiplied by 6mm under the pressure of 50 MPa; then placing the mixture in a high-temperature sintering furnace, uniformly heating the mixture to 600 ℃ for 3 hours, keeping the mixture at the temperature of 600 ℃ for 1 hour, uniformly heating the mixture to 1600 ℃ from 600 ℃ for 5 hours, finally sintering the mixture at 1600 ℃ for 2 hours, and naturally cooling the mixture to obtain the daytime radiation refrigeration material with a block structure of 110mm multiplied by 5 mm.
Performance testing
The sunlight absorptivity, the emissivity and the compressive strength of the daytime radiation refrigeration material prepared by the embodiments and the comparative examples are tested, and the test results are as follows:
| solar reflectance | Emissivity in mid-infrared band | Compressive strength (MPa) | |
| Example 1 | 0.97 | 0.94 | 50 |
| Example 2 | 0.96 | 0.95 | 10 |
| Example 3 | 0.94 | 0.92 | 15 |
| Example 4 | 0.93 | 0.92 | 30 |
| Example 5 | 0.97 | 0.93 | 100 |
| Example 6 | 0.94 | 0.93 | 40 |
| Example 7 | 0.90 | 0.94 | 80 |
| Example 8 | 0.96 | 0.93 | 30 |
| Example 9 | 0.93 | 0.93 | 25 |
| Example 10 | 0.92 | 0.93 | 25 |
| Example 11 | 0.93 | 0.94 | 25 |
| Comparative example 1 | 0.85 | 0.90 | 20 |
| Comparative example 2 | 0.80 | 0.90 | 20 |
| Comparative example 3 | 0.75 | 0.90 | 20 |
| Comparative example 4 | 0.1 | 0.85 | 80 |
According to the above table, in combination with embodiments 1 to 11, the daytime radiation refrigeration material provided by the invention has a sunlight reflectivity of more than 0.9 and an infrared band (8 to 13 μm) emissivity in an atmospheric window of more than 0.9, and can realize a high-efficiency radiation refrigeration effect; the daytime radiation refrigeration material is an all-inorganic block material, has good mechanical strength and durability, and does not turn yellow or become brittle; and the preparation method is simple, and the brick can be applied to building tiles, outdoor floor bricks, exterior wall bricks, scenic spot stool and chair bricks and the like.
It can be seen from the combination of example 1 and comparative examples 1 to 4 that the mass percentage of the inorganic particles with the size of 0.1 to 100 μm in the raw material has a large influence on the emissivity of the daytime radiation refrigeration material in the mid-infrared band, and when the mass percentage of the inorganic particles in the raw material is less than 50%, the solar reflectance and the mid-infrared (light with the size of 0.7 μm to 500 μm) emissivity of the prepared daytime radiation refrigeration material are both significantly reduced.
The thickness has an influence on the properties of the material to be cooled by irradiation during the day: the thickness is mainly embodied as being too small, the transmittance of sunlight is high, and when the transmittance is higher than 0.05, the total reflectivity is certainly less than 0.95, which is not beneficial to cooling. As can be seen by comparing the foregoing examples, the minimum thickness of the daytime radiation refrigeration material differs for different inorganic particle sizes of the inorganic particles. Meanwhile, the refractive indexes of different inorganic particles can also influence the minimum thickness of the daytime radiation refrigerating material, and when the refractive index of the material is higher, the minimum thickness of the daytime inorganic radiation refrigerating material is smaller. In the embodiment of the present invention, different thickness thresholds (minimum thickness thresholds) are set for the daytime radiation refrigeration material according to the types of the inorganic particles: when the inorganic particle size is between 0.1 and 3 mu m, the minimum value of the thickness of the daytime radiation refrigerating material is reduced along with the increase of the particle size; when the inorganic particle size is between 3 and 100 μm, the minimum thickness of the daytime radiation refrigerating material increases with the increase of the particle size.
In one embodiment, the same inorganic particles are respectively used to obtain a plurality of daytime radiation refrigeration materials with block structures with the thicknesses of 0.7mm, 1mm, 2mm and 3.4mm, and the thickness threshold value of the daytime radiation refrigeration material corresponding to the inorganic particles is 5 mm. Fig. 1 shows the visible light transmittance performance of ceramic sheets made of daytime radiation refrigeration materials with different thicknesses in an embodiment of the present application, wherein the abscissa represents the light wavelength and the ordinate represents the transmittance. As can be seen by comparison, the daytime radiation refrigeration material with the 3.4mm block structure has relatively stable and low visible light transmittance for visible light (with the wavelength range of 390nm-780nm) because the thickness of the material is close to the thickness threshold value. In contrast, in the daytime radiation refrigeration material having a block structure of 0.7mm, the visible light transmittance fluctuates greatly due to the distance of the thickness from the thickness threshold, and the transmittance is higher for visible light having a higher wavelength.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (10)
1. A daytime radiation refrigerating material is characterized in that the daytime radiation refrigerating material is formed by sintering raw materials, wherein the raw materials comprise at least one inorganic particle with the size of 0.1-100 mu m in one or more directions;
wherein the mass percentage of the inorganic particles in the raw material is not less than 50%.
2. The daytime radiant cooling material of claim 1, wherein said inorganic particles have a solar average absorption of less than 0.2 and an atmospheric transparent window average emissivity of greater than 0.8.
3. A daytime radiant refrigerant material as set forth in claim 1 or 2, characterized in that said inorganic particles comprise metal oxide particles and/or non-metal oxide particles, and said daytime radiant refrigerant material formed of said inorganic particles has a thickness of at least 1000 μm.
4. A daytime radiant refrigerant material as claimed in claim 3, wherein said inorganic particles include one or more of silica particles, calcium carbonate particles, glass microsphere particles, glass fibre particles, zirconia particles, barium sulphate particles and alumina particles.
5. A radiation refrigerating material as claimed in claim 4, wherein said inorganic particles are glass microsphere particles having a hollow structure and a particle diameter of 1 to 50 μm and a wall thickness of 0.25 to 5 μm.
6. A radiation-cooling material as claimed in claim 3, wherein said inorganic particles are formed by mixing glass fiber particles and glass microsphere particles of solid structure.
7. A preparation method of a daytime radiation refrigeration material is characterized by comprising the following steps:
s1: weighing raw materials with set mass, wherein the raw materials comprise at least one inorganic particle with the size of 0.1-100 mu m in one or more directions;
s2: and (3) randomly stacking or pressing the raw materials to form, and then sintering at high temperature to form the daytime radiation refrigeration material with a block structure.
8. The method for preparing the daytime radiation refrigerating material according to claim 4, wherein the sintering temperature of the high-temperature sintering is 500-3000 ℃.
9. The method for preparing a daytime radiant cooling material as claimed in claim 8, wherein the high-temperature sintering is performed by means of staged sintering.
10. The method for preparing a daytime radiation refrigerating material according to claim 7, wherein the raw materials further comprise a polymerization agent, and the polymerization agent comprises polyethylene glycol or polyvinyl alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110865015.4A CN113416521A (en) | 2021-07-29 | 2021-07-29 | Daytime radiation refrigeration material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110865015.4A CN113416521A (en) | 2021-07-29 | 2021-07-29 | Daytime radiation refrigeration material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113416521A true CN113416521A (en) | 2021-09-21 |
Family
ID=77718540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110865015.4A Pending CN113416521A (en) | 2021-07-29 | 2021-07-29 | Daytime radiation refrigeration material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113416521A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114231073A (en) * | 2021-12-20 | 2022-03-25 | 佛山纳诺特科技有限公司 | Core-shell structure reflective substrate, daytime radiation refrigeration coating, coating and preparation method |
| CN114349480A (en) * | 2022-01-18 | 2022-04-15 | 中国人民解放军国防科技大学 | Daytime radiation refrigeration block material with spectral selectivity and preparation method and application thereof |
| CN114956138A (en) * | 2022-05-18 | 2022-08-30 | 石家庄日加材料技术有限公司 | Alumina reflective particles |
| US20240044593A1 (en) * | 2022-08-03 | 2024-02-08 | City University Of Hong Kong | Passive Radiative Cooling Ceramic |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0292861A (en) * | 1988-09-30 | 1990-04-03 | Naomi Iwagou | Far infrared-radiative material |
| CN1075311A (en) * | 1992-02-12 | 1993-08-18 | 浙江省嘉善远红外光件厂 | A kind of sintering method of infrared radiant material |
| CN101230254A (en) * | 2007-12-27 | 2008-07-30 | 同济大学 | Haloid material for radiative cooling |
| CN103882384A (en) * | 2014-03-20 | 2014-06-25 | 浙江大学 | Methods for preparing AZO target material and AZO transparent conductive thin film |
| CN105348892A (en) * | 2015-11-27 | 2016-02-24 | 上海交通大学 | Radiation refrigeration double-layer nanometer coating and preparation method thereof |
| CN108518026A (en) * | 2018-06-11 | 2018-09-11 | 宁波瑞凌节能环保创新与产业研究院 | A kind of radiation refrigeration bituminized shingle |
| CN108977110A (en) * | 2018-08-24 | 2018-12-11 | 宁波瑞凌辐射制冷科技有限公司 | A kind of radiation refrigeration automobile window films |
| CN110171809A (en) * | 2019-05-10 | 2019-08-27 | 华南理工大学 | A kind of aluminum phosphate uniformed powder material and preparation method thereof for radiation refrigeration |
| CN110317521A (en) * | 2019-07-05 | 2019-10-11 | 宁波瑞凌新能源科技有限公司 | Selective radiation refrigeration coating and its composite material and methods for using them |
| CN111114031A (en) * | 2019-12-31 | 2020-05-08 | 宁波瑞凌新能源科技有限公司 | Radiation refrigeration film, radiation refrigeration composite film and radiation refrigeration product |
| CN111333412A (en) * | 2020-03-09 | 2020-06-26 | 中国人民解放军国防科技大学 | Porous cordierite and preparation method and application thereof |
| CN111394069A (en) * | 2020-03-22 | 2020-07-10 | 华南理工大学 | Silicon dioxide coated magnesium phosphite radiation refrigeration material and preparation method thereof |
| CN111393915A (en) * | 2020-03-23 | 2020-07-10 | 上海大学 | Passive radiation refrigeration composite material layer and preparation method thereof |
| CN111690382A (en) * | 2020-06-18 | 2020-09-22 | 中国科学院光电技术研究所 | Transmission type radiation refrigeration inorganic material |
| CN112833582A (en) * | 2021-01-19 | 2021-05-25 | 郑州大学 | Silicon dioxide thermal metamaterial for realizing radiation refrigeration and application thereof |
| CN112853522A (en) * | 2021-01-07 | 2021-05-28 | 华中科技大学 | Wet spinning radiation refrigeration fiber, preparation method and application thereof |
-
2021
- 2021-07-29 CN CN202110865015.4A patent/CN113416521A/en active Pending
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0292861A (en) * | 1988-09-30 | 1990-04-03 | Naomi Iwagou | Far infrared-radiative material |
| CN1075311A (en) * | 1992-02-12 | 1993-08-18 | 浙江省嘉善远红外光件厂 | A kind of sintering method of infrared radiant material |
| CN101230254A (en) * | 2007-12-27 | 2008-07-30 | 同济大学 | Haloid material for radiative cooling |
| CN103882384A (en) * | 2014-03-20 | 2014-06-25 | 浙江大学 | Methods for preparing AZO target material and AZO transparent conductive thin film |
| CN105348892A (en) * | 2015-11-27 | 2016-02-24 | 上海交通大学 | Radiation refrigeration double-layer nanometer coating and preparation method thereof |
| CN108518026A (en) * | 2018-06-11 | 2018-09-11 | 宁波瑞凌节能环保创新与产业研究院 | A kind of radiation refrigeration bituminized shingle |
| CN108977110A (en) * | 2018-08-24 | 2018-12-11 | 宁波瑞凌辐射制冷科技有限公司 | A kind of radiation refrigeration automobile window films |
| CN110171809A (en) * | 2019-05-10 | 2019-08-27 | 华南理工大学 | A kind of aluminum phosphate uniformed powder material and preparation method thereof for radiation refrigeration |
| CN110317521A (en) * | 2019-07-05 | 2019-10-11 | 宁波瑞凌新能源科技有限公司 | Selective radiation refrigeration coating and its composite material and methods for using them |
| CN111114031A (en) * | 2019-12-31 | 2020-05-08 | 宁波瑞凌新能源科技有限公司 | Radiation refrigeration film, radiation refrigeration composite film and radiation refrigeration product |
| CN111333412A (en) * | 2020-03-09 | 2020-06-26 | 中国人民解放军国防科技大学 | Porous cordierite and preparation method and application thereof |
| CN111394069A (en) * | 2020-03-22 | 2020-07-10 | 华南理工大学 | Silicon dioxide coated magnesium phosphite radiation refrigeration material and preparation method thereof |
| CN111393915A (en) * | 2020-03-23 | 2020-07-10 | 上海大学 | Passive radiation refrigeration composite material layer and preparation method thereof |
| CN111690382A (en) * | 2020-06-18 | 2020-09-22 | 中国科学院光电技术研究所 | Transmission type radiation refrigeration inorganic material |
| CN112853522A (en) * | 2021-01-07 | 2021-05-28 | 华中科技大学 | Wet spinning radiation refrigeration fiber, preparation method and application thereof |
| CN112833582A (en) * | 2021-01-19 | 2021-05-25 | 郑州大学 | Silicon dioxide thermal metamaterial for realizing radiation refrigeration and application thereof |
Non-Patent Citations (3)
| Title |
|---|
| CHENGLONG LV ETAL.: ""4A zeolite based daytime passive radiative cooling material"", 《INFRARED PHYSICS & TECHNOLOGY》 * |
| 杨金萍 等: ""高辐射率红外陶瓷材料的制备及性能研究"", 《第241-244页》 * |
| 杨金萍 等: ""高辐射率红外陶瓷材料的制备及性能研究"", 《耐火材料》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114231073A (en) * | 2021-12-20 | 2022-03-25 | 佛山纳诺特科技有限公司 | Core-shell structure reflective substrate, daytime radiation refrigeration coating, coating and preparation method |
| CN114349480A (en) * | 2022-01-18 | 2022-04-15 | 中国人民解放军国防科技大学 | Daytime radiation refrigeration block material with spectral selectivity and preparation method and application thereof |
| CN114956138A (en) * | 2022-05-18 | 2022-08-30 | 石家庄日加材料技术有限公司 | Alumina reflective particles |
| US20240044593A1 (en) * | 2022-08-03 | 2024-02-08 | City University Of Hong Kong | Passive Radiative Cooling Ceramic |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113416521A (en) | Daytime radiation refrigeration material and preparation method thereof | |
| CN100432713C (en) | Near infrared shielding film | |
| KR101432861B1 (en) | Light redirecting solar control film | |
| TW202102644A (en) | Radiative cooling functional coating, method for manufacturing the same and application thereof, and selective radiative cooling functional coating and composite material | |
| KR102185826B1 (en) | Heat-insulating paint composition and heat-insulating method using the same | |
| CN111114031B (en) | Radiation refrigeration film, radiation refrigeration composite film and radiation refrigeration product | |
| CN109679537B (en) | Fireproof layer material, preparation method thereof and fireproof glass | |
| CN111690301B (en) | Radiation refrigeration coating with gradient structure and preparation method and application thereof | |
| JP2013533200A (en) | Transparent glass-ceramic material containing lithium, having a low coefficient of thermal expansion, a substantially amorphous, lithium-deficient, mainly glassy surface area, and a high transmittance, its production in an aqueous atmosphere And use | |
| CN100366573C (en) | Evaporation material for the production of average refractive optical layers | |
| KR102577243B1 (en) | Composite plastic film for replacing the front glass of a thin film solar module | |
| CN113698811B (en) | Cooling coating and cooling coating | |
| GB2587946A (en) | Outer wall material and method for manufacturing same | |
| CN112239328B (en) | Radiation refrigeration film and preparation method thereof, radiation refrigeration glass and preparation method thereof | |
| CN100582044C (en) | Vaporizing deposition material for producing highly refractive optical layers | |
| CN210894760U (en) | Radiation refrigeration film | |
| CN100581810C (en) | Plastic filming module assembly and method for manufacturing same | |
| CN107987598B (en) | Reflective heat-insulating coating for high-speed railway ballastless track plate and preparation method thereof | |
| CN105802409A (en) | Elastic, reflective and heat-insulation coating and preparation method thereof | |
| US20080000573A1 (en) | Methods of forming aluminum oxynitride-comprising bodies, including methods of forming a sheet of transparent armor | |
| CN104930302B (en) | Heat-insulated protecting film and its application | |
| CN105128481A (en) | Recyclable self-adhesive nanoceramics heat insulation film | |
| CN100478490C (en) | Vaporizing material for producing highly refractive optical layers | |
| CN108621503B (en) | Transparent heat insulation composite material and preparation method thereof | |
| CN112248571A (en) | Fireproof heat-preservation reflection heat-insulation wall heat-preservation composite board and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |