135results about How to "High infrared emissivity" patented technology

The invention relates to the technical field of infrared and discloses an electromodulation MEMS (Micro-electro-mechanical Systems) infrared source and fabrication method thereof. According to the infrared source and the method, a four-side fixed support structure is adopted, heating electrodes fixed on a support film are used for generating external infrared radiation energy, so that the electromodulation MEMS infrared source is secure in structure, stable in working performance, and high in duty ratio, a fabrication technology is simple, the cost is low, and massive production with low cost is realized.

The invention discloses a high-infrared-radiance insulating heat conduction adhesive. The high-infrared-radiance insulating heat conduction adhesive comprises, by mass, 10%-60% of matrix resin materials, 10%-70% of thinning agent, 1%-10% of surface treating agent, 1%-10% of curing agent, 0.1%-1% of accelerant and 10%-60% of functional filler. According to the high-infrared-radiance insulating heat conduction adhesive, high-infrared-radiance tourmaline nanometer particles are applied to the insulating heat conduction adhesive for the first time, the high-infrared-radiance insulating heat conduction adhesive has the insulation characteristic, the heat-conduction characteristic and the infrared-radiation characteristic at the same time accordingly, and the whole heat dissipation performance of a composite material is improved; the prepared adhesive can be widely applied to the fields of electronic products and related insulation heat conduction.

The invention discloses a radiation cooling film which is formed by mixing ceramic particles, an organic solution and a curing agent, mixing the ceramic particles with an organic curing precursor solution, and curing, a micro-nano photon structure array is formed on the surface of the film, and the micro-nano photon structure array comprises a plurality of arrayed micro-nano photon structure elements. The invention further discloses a preparation method and application of the radiation cooling film. The film has the reflectivity of 95% in the sunlight band and the radiance of 96% in the atmospheric window band, can be lower than the ambient environment by 10 DEG C at most under the illumination condition, and also has good flexibility and strength and excellent hydrophobicity. The radiation cooling film is prepared in a low-cost and large-area manner by adopting a multi-etching double-spin-coating vacuum thermocuring process. The radiation cooling film is applied to the aspects of human body wearable cooling, cooling umbrellas and device heat dissipation, and a cooling method is achieved by removing heat from the surface and the interior of a main body in a heat radiation mode.

The invention belongs to the technical field of inorganic non-metal materials, and in particular relates to an anti-oxidation decarburized coating in the process of billet rolling and a preparation method thereof. The invention provides a low-cost and good-performance anti-oxidation decarburized coating in the process of billet rolling, which comprises the following raw materials in parts by weight: 20-60 parts of vanadium extraction tailings, 0-40 parts of agglutinant and 30-60 parts of binding agent. The coating is used in the process of billet rolling, can effectively reduce the oxidation rate and carbon loss of billets and can improve the heating efficiency of a heating furnace for the billets. The preparation method is a solution to the problem of pollution of vanadium extraction tailings, and can reduce the production cost of the anti-oxidation decarburized coating by changing the tailings into valuables.

The invention discloses an iron tailing far-infrared ceramic material and a preparation method thereof. The ceramic material is characterized by being prepared from the following components in percentage by weight: 35-75% of iron tailings, 1-9% of clay, 11-25% of silicon dioxide, 11-25% of calcium carbonate and 2-6% of aluminum oxide, wherein the sum of the percentage of the components is 100%; the iron tailing comprises the following main components: 30-35% of SiO2, 20-25% of Fe2O3, 10-15% of Al2O3, 10-15% of TiO2 and a small amount of CaO, Na2O and MgO, and the sum of percentage of the components is 100%; XRD shows that the main components of the ceramic material are anorthite, diopside and titanium sheet iron ore. According to the preparation method, the iron tailing, the clay, silicon dioxide, calcium carbonate and aluminum oxide are used as raw materials, and are subjected to ball-milling, screening, allocation, stirring, drying, mixing, dry pressing forming and sintering, thereby preparing the iron tailing far-infrared ceramic material.

A method for preparing a graphene/MnO₂ porous material having a high infrared emissivity; the method adopts graphene and potassium permanganate as raw materials, and uses a simple ultrasonic dispersion method to uniformly disperse the graphene and the potassium permanganate in the water solution; subsequently, the graphene/MnO₂ porous material can be obtained through the hydrothermal reaction; the present invention is simple and easy-operating, and the infrared emissivity of the porous material prepared according to the method of the present invention is 0.94-0.98 at a distance of 8-14 μm, which is stable, eco-friendly, and can be widely applied to far-infrared products.

A solar collector has an opaque cover heated by solar energy. Heat flows from the opaque cover by conduction, convection, and infrared emittance across a gap within an at least substantially airtight enclosure to an absorber containing a working fluid. The exterior surface of the opaque cover has high solar energy absorptance and the interior surface has high infrared emittance. The exterior surface preferably has low infrared emittance. In one embodiment, fully wetted surface geometry permits direct and reflected infrared absorption by the absorber. The opaque cover eliminates the weight, cost and other shortcomings of glass. A hollow continuous side wall with rounded corners provides an embodiment that is robust yet economical, that is easy to manufacture and seal, that permits a reduced thickness of the opaque cover and mitigates the destructive potential of severe winds, and that can withstand the compressive forces experienced by an evacuated solar collector.

The present invention provides an infrared energy-saving coating material and applications thereof, and belongs to the technical field of infrared energy-saving materials, wherein a high-emissivity infrared energy-saving material is adopted as a core component, and a dispersant accounting for 3-5% of the mass of the infrared energy-saving coating material, a liquid binder accounting for 10-50% of the mass of the infrared energy-saving coating material, and a stabilizer accounting for 2-5% of the mass of the infrared energy-saving coating material are added to prepare the infrared energy-saving coating material, wherein the high-emissivity infrared energy-saving material adopts lanthanum aluminate of the perovskite structure as a main phase, 0.01-0.25 mole of second main group element ions is doped at the lanthanum site, and 0.02-0.5 mole of transition metal element ions is doped at the aluminum site. According to the present invention, the highest emissivity of the prepared infrared energy-saving coating material can achieve 0.95, and the prepared infrared energy-saving coating material has good high temperature stability, and has great application potential in the high temperature thermal industry furnace kiln energy saving field.

The invention discloses a high-temperature nanometer energy-saving coating, which consists of a component A, a component B and a component C, the component A contains the following components in parts by weight: 5-20 parts of feldspar, 5-15 parts of kaolin, 1-15 parts of Suzhou clay, 5-15 parts of mullite, 10-40 parts of cordierite, 1-10 parts of mineral glass-ceramics, 1-20 parts of zeolite, 0.5-3 parts of nanometer alumina, 0.5-15 parts of ferroferric oxide, 0.5-10 parts of mica, 1-15 parts of talcum powder and 1-25 parts of zircon sand; the component B contains the following components in parts by weight: 1-10 parts of nanometer titanium dioxide, 20-60 parts of titanium dioxide, 1-10 parts of nanometer silica and 20-60 parts of silica; and the component C is water glass or aluminum dihydrogen phosphate. The high-temperature nanometer energy-saving coating has long-term stable and high infrared emissivity and long service life, does not need high-temperature doped synthesis, is convenient for industrialization and has good energy-saving effect after industrial application.

The invention discloses a low-temperature sintering high-heat conduction ceramic paint suitable for metal base material and a preparation method and an application thereof. The paint comprises the following raw materials: low-temperature molten glass powder, iron oxide red, copper-chrome black, cerium dioxide, boron nitride, iolite micro powder, alumina micro powder, chromium sesquioxide micro powder, 20-50% of silicon aluminium sol, 0.5-3% of an auxiliary agent, and the balance of water. The method comprises the following steps: a metal matrix is processed, then the surface of the metal matrix is uniformly coated with a paint and dried in shade; and the coated metal matrix is heated at the temperature of 650-900 DEG C to form the low-temperature sintering high-heat conduction ceramic paint. The paint has the advantages of easy acquisition of the raw materials and low cost, is tightly combined with the metal matrix, has effective high temperature oxidation resistance, acid corrosion resistance and abrasion resisting effects of a heating furnace flue heat exchanger on a metal heat exchanger, ceramic coating surface is smooth and clean, slag buildup of the heat exchanger is effectively reduced, the service life of the metal heat exchanger is prolonged, and the heat exchange efficiency effect is increased.

The invention provides a method for improving the photovoltaic conversion efficiency of a solar photovoltaic power generation panel, comprising: using an EVA adhesive film to bond a composite metamaterial film to the light-receiving surface of a solar photovoltaic power generation panel; the composite metamaterial film is prepared by the following method : Micron-sized SiO ₂ The microspheres are dispersed in the dispersant and ultrasonically oscillated to obtain SiO ₂ microsphere dispersion; make SiO ₂ The microsphere dispersion is evenly distributed on the polymethylpentene film, so that the SiO ₂ The microsphere dispersion is volatilized, and the distribution of SiO ₂ Polymethylpentene thin film of microspheres; using rolling machine to distribute SiO ₂ The polymethylpentene film of the microspheres was rolled to obtain the composite metamaterial film. The invention utilizes the principle of radiation cooling to significantly reduce the surface temperature of the solar photovoltaic power generation panel, thereby improving the photovoltaic conversion efficiency of the solar photovoltaic power generation panel, and also has the advantages of low energy consumption, high efficiency and simple structure.

Disclosed is an optical thin film for a thin-film solar cell, which is formed directly on a top surface of the thin-film solar cell having a transparent conductive film layer to provide a high infrared emissivity and a lower solar absorptivity to the thin-film solar cell. The optical thin film is formed through a vacuum vapor deposition process. The thin film makes it possible to provide enhanced infrared emissivity based on its reduced thickness, while suppressing unnecessary incoming solar radiation in a simplified structure to achieve a reduced solar absorptivity so as to maintain desired cell efficiency. The optical thin film of the present invention is capable of achieving reduction in weight of a solar cell, and suitable for use, particularly, in space environments.

The present invention relates to a thermal insulation reflective stone-like coating, which is made from the following components by weight: water, non-ionic water-soluble cellulose ethers, a water-based multi-functional additive, a dispersant, a wetting agent, titanium dioxide powder, glass beads, ceramic beads, a organosilicon-modified acrylate emulsion, a coalescent, a cosolvent, a defoamer, an antiseptic, a rheological additive and artificial sintering sand. The invention overcomes the disadvantage of safety hidden trouble caused by large dead load of the coating in the matching operation of insulation system and a stone-like coating of the prior art. The thermal insulation reflective stone-like coating has the advantages of simple operation, light weight, and good heat reflection properties and film properties.

The invention discloses a high-temperature-resistance infrared-radiation-attenuation-resistance energy-saving coating. The coating is prepared from, by weight, 10-20 parts of LaAlO3 spherical powder doped with calcium and chromium ions, 10-20 parts of metallic oxide infrared radiation micro powder, 5-10 parts of titanium carbide-cordierite infrared radiation micro powder, 15-25 parts of filler, 0.1-0.2 part of a retardant, 30-50 parts of an adhesive, 10-20 parts of a solvent, 0.15-0.25 part of a dispersion agent, 0.1-0.35 part of a coupling agent and 0.05-0.15 part of a defoaming agent. The invention further discloses a preparation method of the coating. The coating comprises the following steps of step one, raw material preparation; step two, high temperature treatment; step three, high shearing dispersion; step four, coating preparation. The infrared radiation rate of the full-wave band of the provided energy-saving coating is 0.94-0.98, infrared radiation attenuation can be effectively prevented, after long-time using of the coating, the phenomena of cracking and coating shedding cannot occur, and the thermal shock resistance is high.

The invention discloses a water-based vacuum ceramic microbead insulation paint used for textile fabric substrates and a preparation method thereof. The paint consists of one-component waterborne polyether polyurethane resin, organic-inorganic hybrid resin, a reflective functional filler, vacuum ceramic microbeads, an auxiliary pigment and filler, and an auxiliary agent. A coating adopts the vacuum ceramic microbeads with bi-gradation model ratios to make arrangement more compact, so that the coating cured at a normal temperature has a lower heat conductivity coefficient, and the heat insulation performance of the coating can be significantly enhanced; the vacuum ceramic microbeads can enhance the compatibility between the resin and the microbeads after being processed by the organic-inorganic hybrid resin, so that the adhesive force between the coating and base materials can be significantly improved; and the auxiliary pigment and filler have reflection functions, so that a paint filmcan have higher reflectivity and reflect most of sunlight. The coating has good compatibility with fabric base materials, and is excellent in adhesive force, flex resistance, intensity and scratch resistance, so that demands of repeatedly folding textile fabrics can be met; and the paint is excellent in heat insulation performance, thermal insulation temperature difference can reach more than 12DEG C, and therefore, water-based environmental protection can be achieved.

The invention discloses a preparation method of a high-emissivity energy-saving infrared radiation coating. The preparation method comprises steps as follows: step one, preparation of coating materials; step two, pretreatment of a base body; step three, spraying of the coating; and step four, sintering and curing of the coating. The coating is stable in structure under high-temperature sintering, performance is comprehensively promoted, the emissivity of the coating cannot be attenuated and aged during use, and the service life of the coating is longer than six years; glazing ceramic coating with a compact structure is formed on the furnace lining surface, the service life of a furnace is prolonged by more than two times, and maintenance and overhaul workload of a furnace lining, consumption of raw materials and maintenance cost are reduced.

The invention relates to a preparation method of an infrared coating used for household cooking utensils, and a preparation method of an infrared coat. The problems of low emissivity, large thermal efficiency loss and limited coating shape of coats existing in the prior art at a high temperature are mainly solved in the invention. The infrared coating is synthesized by using an infrared composite filler and a high temperature resistant adhesive, wherein the composite filler is synthesized by using the following raw materials, by weight, 35-75 parts of Cr2O3, 5-30 parts of TiO2, 20-35 parts of CuO, and 0/100-200 parts of anhydrous ethanol. The preparation method of the infrared coating comprises the following steps: mixing the raw materials according to above proportions, ball-milling, carrying out high temperature roasting to prepare the infrared composite filler, ball-milling the infrared composite filler and the high temperature resistant adhesive in proportion, and mixing to prepare the infrared coating. The preparation method of the infrared coat is characterized in that the infrared coat with high emissivity is prepared by coating the infrared coating on the household cooking utensils through a reverse dip-coating process. The coat prepared in the invention still has a high emissivity at a high temperature, has a total infrared emissivity of above 0.90, has a superior thermal shock resistance, and can obviously improve the heating efficiency in order to realize energy saving. The reverse dip-coating process adopted in the invention is suitable for coating the cooking utensils with complex shapes.

The invention relates to the technical field of cooling and discloses a passive radiation cooling composite film. The passive radiation cooling composite film comprises a planar metal reflecting layer(1) and an infrared light emitting layer (2) made of polydimethylsiloxane, and the planar metal reflecting layer and the infrared light emitting layer are sequentially arranged from bottom to top; and a one-dimensional or two-dimensional micron-scale optical microstructure unit (3) is arranged on the upper surface of the infrared light emitting layer (2). Compared with the prior art, in the filmdisclosed by the invention, when infrared light passes through the infrared light emitting layer, the infrared light emitting layer has relatively high infrared emissivity, so that heat can be radiated to an external cosmic space through an 'atmospheric window ' of a specific waveband of 8-13 microns as much as possible; and meanwhile, most of incident sunlight is reflected by the planar metal reflecting layer, so that the radiation cooling effect is achieved. The passive radiation cooling composite film has the advantages of flexibility, foldability, ultra-thinness, no consumption of externalenergy, environmental friendliness, green sustainable development and the like, and can be applied to electronic equipment, mechanical equipment and other occasions where active cooling means cannotbe adopted.

The invention discloses a black-increasing agent for a high-temperature infrared-radiation energy-saving coating. The black-increasing agent is prepared by the following raw materials in percentage by weight: 20-60% of MnO2, 10-20% of Fe2O3, 1-5% of Co2O3, 5-10% of CuO, 0-10% of Cr2O3, 0-10% of NiO, and 20-40% of emery powder. The invention also discloses a preparation method of the black-increasing agent for a high-temperature infrared-radiation energy-saving coating. The black-increasing agent provided by the invention has the advantages of wear resistance, high temperature resistance and stable radiance, and is mainly used for fireproof base materials such as alumina bricks and mullite and metal base materials for boiler water wall tubes. The prepared coating has high infrared emitting ability at the temperature below 1300 DEG C within a broadband of 2.5-16.7 mum, with the average value being 0.88-0.92. The service temperature reaches up to 1450 DEG C, the black-increasing agent is stable at high temperature, the service life is not less than three years, the process is simple, and the cost is low.