57results about How to "Increase heat radiation rate" patented technology

The invention relates to ceramic coating used for a heating furnace. The ceramic coating comprises the following components: ceramic micro powder, an inorganic bonding agent and a linear thermal expansivity regulator. The invention also provides a method for preparing the ceramic coating for the heating furnace. The ceramic coating has the characteristics of having improved radiance and thermal shock resistance, being efficient and energy-saving, prolonging the service life of furnace linings and furnace tubes, improving temperature uniformity and the like, as defined below: (1) the energy consumption is reduced, the energy is saved by more than 3 percent and pollutant discharge is reduced; (2) the temperature uniformity in the heating furnace is improved: (3) the metallurgy stability of the furnace tube of the heating furnace is improved, the coking and scaling of the furnace tub are delayed, and the absorbing capacity of the furnace tube can be maximized; (4) the emissivity of the surface of the refractory lining layer can be maximized so as to increase the secondary radiation of radiant heat (energy) and increase the efficiency of the radiant section; and (5) the outer wall temperature and the exhaust gas temperature of the heating furnace can be reduced by more than 5 percent.

The Ni-Cr spinel type infrared radiation powder material is prepared by using Cr2O3 and NiO with stable high performance as main components and TiO2, Nb2O5, TiN and TiB2, or Fe2O3 and MnO2, or SiO2 and ZrO2 as supplementary material, and through the steps of mixing powdered solid materials, adding adhesive and water to compound slurry, spray drying to form aggregate powder, and final plasma nodulizing or sintering to densify. The Ni-Cr spinel type infrared radiation powder material has heat radiation factor as high as 0.89-0.93, and may be molten and sprayed via plasma spraying, oxygen-acetylene flame spraying or fuel gas expansion spraying to surface of base body to form firm mechanically combined coating, which has controllable thickness, chemical performance stable in 500-700 deg.c, high heat shock resistance and low heat radiation factor attenuation in long term use.

An insulation sheet for electric machine that forms slot insulation sheet is configured by an aramid paper and a PPS film directly pressure laminated without use of an adhesive. This means that no adhesive layer interposes the aramid paper and PPS film. PPS film is less costly as compared to a polyimide film and possesses better thermal properties such as higher heat emissivity and is highly resistant to heat. Thus, high strength is maintained even when subjected to high temperature over extensive time. Further, because the aramid paper and PPS film are laminated directly without an adhesive layer, the laminate is reduced in thickness. This allows further thinning of the laminate.

A beam manipulating arrangement for a multi beam application using charged particles comprises a multi-aperture plate having plural apertures traversed by beams of charged particles. A frame portion of the multi-aperture plate is heated to reduce temperature gradients within the multi-aperture plate. Further, a heat emissivity of a surface of the multi-aperture plate may be higher in some regions as compared to other regions in view of also reducing temperature gradients.

A sheet of thermally reflective material (1) has a surface texture comprising a plurality of reflecting elements (2), wherein each element has a first facet (4) which is substantially reflective at thermal infrared wavelengths and wherein the respective first facets (4) form an angle θ with the plane of the sheet (A-B) (0°<θ<90°). Preferably, the first facets (4) are aligned such that, in use, thermal radiation is reflected from a common direction. By orienting the sheet of thermally reflective material to reflect cold regions of the sky, a marking material exhibiting a cold spot in a thermal imager can be provided.

The invention relates to a graphene high temperature resistant corrosion-resistant coating for a metallic material and a preparation method of the graphene high temperature resistant corrosion-resistant coating. The graphene high temperature resistant corrosion-resistant coating consists of the following components in parts by weight: 6-12 parts of graphene oxide, 20-45 parts of a phenolic resin,2-6 parts of polyvinyl butyral, 1-4 parts of rare earth chloride, 12-30 parts of graphene quantum dots, 2-5 parts of a heat conduction metallic powder, 3-6 parts of carbon nanotubes, 12-30 parts of asolvent, 2-6 parts of an antioxidant, 5-9 parts of a curing agent and 12-18 parts of a defoaming agent, wherein the graphene quantum dots is 2-4nm in size; the solid content of the phenolic resin is 45-55%. According to the graphene high temperature resistant corrosion-resistant coating provided by the invention, by the virtue of the good dispersibility of the graphene quantum dots in solvents andrelatively good non-covalent functions of the graphene quantum dots with graphene sheets, two-dimensional sheet structures of the graphene can be overlapped layer by layer in the coating, a compact physical insulating layer can be formed, and the corrosion resistance of the coating can be improved.

The present invention relates to a photovoltaic module characterized by comprising a heat radiating sheet overlaid with a ceramic coating layer, which is attached to a conventional photovoltaic module. In a method of increasing heat radiation with the aid of the ceramic coating layer provided on both sides or one side of the heat radiating sheet, heat generated by a solar cell due to the differences in thermal emissivity, thermal shear rate and surface area of a material is transferred to a solar EVA and then a heat radiating sheet thin plate that serves as a carrier, and returns back to the ceramic coating layer for emission. A high thermal emissivity is obtained by having a so-called heat transfer phenomenon in one direction, which resultantly improves a heat radiation performance and increases the refrigeration efficiency of the photovoltaic module and its peripheral devices to thus lower the internal temperature. As such, the power generation rate and efficiency through a module to which the heat radiating sheet is applied can be maximized, and a photovoltaic module with such a heat radiating sheet can maintain a change in the power generation rate traditionally due to a change in the surface temperature at a constant level, thereby increasing the annual power generation rate by 3-5% compared to that of the conventional one and improving the power generation effect during the summer season by 5-10%. Further, wide applicability can be ensured by equally applying the photovoltaic module of the present invention to areas having severe heat or high-temperature and high-humidity tropical weather as well as desert areas. In addition, the photovoltaic module according to the present invention is advantageous in that it is applicable not only to a new module but also to an already existing module, which makes it possible to manufacture those photovoltaic modules under the same process conditions as with the conventional ones without modifying the existing equipment.

Provided is a rack for firing which holds a plurality of flat board-like setters at multiple levels in the perpendicular direction by means of a setter holding means, and fires electronic ceramic elements at multiple levels. The setter holding means is composed of a material composed of Si-SiC containing 0.01-30 % of Si or recrystallized SiC or Si3N4-SiC, and the setter holding means holds each of the flat board-like setters with 70-100 % of the outer circumferential side surface thereof exposed. Consequently, the rack has excellent energy efficiency, mass-production efficiency, and uniform heating characteristics at each of the multiple levels in the multiple-level firing.

The invention provides a method for preparing a heat-dissipating and antistatic polyaniline epoxy organosilicone graphene coating. The method comprises the following steps of: (1) preparation of a main agent A: the preparation of the main agent A comprises the steps of adding organosilicone-modified epoxy resin and a dispersing agent into a solvent according to the amount of a formula, performingeven stirring, adding conductive titanium dioxide, carbon nanotubes, graphene and polyaniline into the stirred mixture sequentially, after the added materials are dispersed evenly, putting the obtained mixture into a grinding machine for grinding until the grinding fineness is less than or equal to 20 microns, putting the ground color paste into a clean stirring kettle, adding a defoaming agent, aleveling agent, a matting agent and a surface modifier sequentially with stirring, performing even mixing, and performing filtration and package to obtain the main agent A; and (2) preparation of a curing agent B: the preparation of the curing agent B comprises the steps of weighing an amine curing agent according to the amount of the formula, and performing filtration and package to obtain the curing agent B. The heat-dissipating and antistatic polyaniline epoxy organosilicone graphene coating has high heat emissivity, high thermal conductivity and low thermal resistance, and has propertiesof both polyaniline and epoxy organosilicone at the same time and a high practical value.

The invention provides a high-temperature nano radiation coating for a heating furnace and a preparation process thereof. The coating comprises radiation function powder particles, an inorganic adhesive and an expansion coefficient regulator. The preparation process comprises the following steps: preparing the radiation function powder particles, preparing the expansion coefficient regulator, synthesizing the inorganic adhesive, mixing the radiation function powder particles, the inorganic adhesive and the expansion coefficient regulator, and filtering and grinding the obtained mixture so as to obtain the high-temperature nano radiation coating for the heating furnace. The high-temperature-resistant nano radiation coating disclosed by the invention has the characteristics of capability of increasing the radiance and the thermal shock stability, energy conservation and environmental friendliness, corrosion resistance, and capability of prolonging the service life of the heating furnace and raising the temperature uniformity, and the like. The technical indexes of the products provided by the invention are as follows: a temperature of 1800 DEG C can be resisted, the radiance epsilon is greater than or equal to 0.92, the thermal shock resistance (1300 DEG C) is greater than or equal to 5 times, the thickness of the coating is 0.1-0.2 mm, and the service life is greater than or equal to 6 years.

The heat dissipating housing (1) of the present invention includes a housing body (11) made of metal, and a first semiconducting tape for heat dissipation (12) attached to at least a part of the inner wall of the housing body (11). The first semiconducting tape for heat dissipation (12) includes a fluoropolymer substrate (13) containing carbon black, and an adhesive layer (14) formed on the fluoropolymer substrate (13).

A composite graphite material comprises 70-100wt% of expandable graphite, 0-30wt% of a graphene-like material and 0-30wt% of carbon nanotube, wherein the bulk density of the graphene-like material is 0.15-0.3g/cm<3>, and the granularity of the graphene-like material is 50-300 meshes. The invention also relates to an application of the composite graphite material as a heat wave conversion material. The composite graphite material has a very high heat wave conversion efficiency at a low temperature of 10-50DEG C, uses the directional heat conduction performance of graphite, and also has the advantages of high heat conduction efficiency, fast speed and low cost; and the composite graphite material can realize bidirectional low temperature conversion of infrared ray wave and heat energy as a heat wave conversion material, and realizes heating and refrigeration in spaces.

The invention discloses a ceramic coating protection gradient carbon-ceramic composite material and a preparation method thereof. The ceramic coating protection gradient carbon-ceramic composite material comprises: a gradient carbon-ceramic composite material which is provided with a concave structure on the surface thereof and is a gradient C/C-ZrC-SiC composite material; and an ultrahigh-temperature ceramic coating which is continuously arranged along the surface of the gradient carbon-ceramic composite material and the inner wall surface of the concave structure. The ultrahigh-temperature ceramic coating is an indissolvable metal carbide coating formed by diffusing and infiltrating indissolvable metal along the surface of the gradient carbon-ceramic composite material and reacting the indissolvable metal with the surface of the gradient carbon-ceramic composite material. Therefore, the formed ceramic coating is a three-dimensional jack structure coating, the interfacial strength of the ceramic coating is far higher than that of a two-dimensional plane coating, the surface area of the coating is greatly increased due to the arrangement of the concave structure, meanwhile, the flow resistance of melt on the surface of the composite material can be improved, then the overall temperature resistance of the composite material can be improved, and the risk of coating stripping is reduced.

The invention discloses a thermochemical vapor deposition reactor and a method for improving the thermal radiance in the reactor. Before a reaction, a device in a reaction cavity is subjected to surface pretreatment, so as to change the roughness of the surface of the device or the material composition on the surface of the device to passivate the surface of the device, thereby improving the thermal radiance value of the device. According to the invention, the surface of the device in the reaction cavity can reach stable thermal radiance before a reaction, thereby ensuring processing uniformity and effect.

The invention discloses a photocureable resin composition which comprises: (A) 100 parts of epoxide resin by weight; (B) 0.01 to 20 parts of photopolymerization initiator by weight; (C) 0.01 to 10 parts of coupling agent by weight; and (D) 0.01 to 120 parts of mineral filler by weight. The photocureable resin composition can also comprise (E) 0.05 to 10 parts of photo-acid-generator by weight. The photocureable resin composition has improved heat conductibility and a damp insulation function, thereby can be used for producting display devices, such as organic light emitting diode (OLED), liquid crystal displays (LCD) and pliability displays.

The invention discloses a high radiant ceramic coating for a heating furnace tube as well as a preparation method and a using method thereof. The high radiant ceramic coating for the heating furnace tube comprises a component A and a component B, wherein the component A is a metallic oxide mixture which is 30-35% of the total amount and the component B is a temperature resistant bonder which is 65-70% of the total amount. The high radiant ceramic coating provided by the invention has the functions of anti-high temperature oxidation and anticorrosion, prolongs the service life of the furnace tube, increases the heat transfer on the surface of the furnace tube, increases the heat exchange efficiency, reduces the fuel consumption of the heating furnace and reaches the energy saving purpose; under the condition of not changing the device structure, the high radiant ceramic coating reinforces the radiative transfer, is few in investment, rapid in effect, simple in construction and good for industrial popularization.

The invention discloses a multi-element gradient modified iridium coating layer and a preparation method thereof. The multi-element gradient modified iridium coating layer comprises a Re layer, an Irlayer, an Ir-Al layer and an X permeating layer arranged on a graphite substrate in sequence from bottom to top, wherein X=Hf, Zr or Cr. The preparation method comprises the following steps: (1) the graphite substrate/rhenium/iridium system is prepared as an original material; (2) Al powder, Al2O3 powder and a halogen supply agent are firstly mixed to prepare an Al permeating agent; and then, metal X powder, metal oxide XO powder and the halogen supply agent are mixed to prepare an X permeating agent; (3) an Ir-Al coating layer is prepared by adopting powder embedding solid permeation; and (4)an Ir-Al-X gradient coating layer is prepared by adopting powder embedding solid permeation; and finally, the multi-element gradient modified iridium coating layer is obtained. The prepared multi-element gradient modified iridium coating layer is more excellent in high-temperature oxidation resistance, refractory metal oxide melting point and heat radiation rate compared with a traditional high-temperature oxidation resistant coating layer.

The invention discloses an ETFE (ethylene-tetrafluoroethylene copolymer) film and a preparation method thereof. The film is prepared from the ETFE and an additive, wherein the processing temperature is 190 to 210 DEG C; the user amount ratio of the ETFE to the additive is 1:(10-20) percent according to the percentage by weight; the melt index of the ETFE is 20 to 25; and the functional additive comprises more than any one of the conventional fluoroplastic additive and the conventional engineering additive as well as graphene. The ETFE film provided by the invention has high thermal radiation ratio, high heat conductivity and low heat resistance value, has self-cleaning property, acid and alkali resistance and ultrahigh insulativity while cooling, and has strong practical value.

The invention relates to a double-layer photothermal conversion composite material and a preparation method thereof, and belongs to the technical field of solar energy utilization. The composite material comprises a bottom transition layer and a top high-heat radiation rate layer, wherein the bottom transition layer and the top high-heat radiation rate layer of the composite material are prepared on a substrate material in sequence through a preparation method of vapor deposition or magnetron sputtering; the bottom transition layer and the substrate material are directly connected; and the top high-heat radiation rate layer and the bottom transition layer are also directly connected. The composite material has the characteristics of high working temperature, high heat radiation rate, strong heat shock resistance and long service life, and is a new high-performance photothermal conversion material.

The invention relates to an environment-friendly fuel oil agent for promoting quality and effect of fuel oil. The environment-friendly fuel oil agent comprises the following materials by weight percent: 1-9% of octanol, 1-5% of tolyltriazole, 8-60% of 2,5-diethoxy tetrahydrofuran, 10-60% of azide, 1-28% of nonyl phenol polyoxy propylene ether amine, 0-20% of diethanolamide borate laurate, 0-10% of coconut oleate methyl monoethanolamide and 0-30% of isooctyl nitrate. According to the invention, the clean combustion, catalytic combustion and control combustion techniques are organically combined for efficiently removing and preventing scale of an oil-way system and an exhausting system in chemical and physical modes; the surface metal in an engine can be activated to form a powerful catalytic field and a 'flame combustion' mode is converted into 'flameless combustion'; the starting/ending temperature of the control combustion is reduced, the speed is increased, the photo-thermal energy is effectively converted and the thermal radiation rate is increased; and a new mode of instantly breaking liquid oil molecules into gaseous micro-molecule residues and then quickly, thoroughly and cleanly combusting with the stimulated oxygen is realized and the optimization of the quality of the fuel oil and the upgrading of the effect differentiation are realized.