61results about How to "Improve emissivity" patented technology

The invention discloses PTC graphene heating printing ink and a preparation method thereof. The PTC graphene heating printing ink is prepared from the following components in percentages by mass: 50% to 70% of a binder, 9% to 21% of a solvent, 1% to 3% of an additive, 10% to 20% of a conductive filler and 5% to 20% of a PTC functional material. The preparation method comprises the following steps: (1) firstly stirring and dispersing the binder, the solvent and the additive for 20 to 30 min, then adding the PTC functional material into stirring equipment for stirring for 8 to 12 min, and finally adding the conductive filler for uniform stirring to obtain a coarse paste; and (2) carrying out four to six times of three-roller grinding on the coarse paste so as to obtain the PTC graphene heating printing ink. The invention also discloses a heating film. The heating film comprises an organic polymer base material film, the PTC graphene heating printing ink, a conductive silver paste, conductive copper foil and an organic polymer adhesive film. The PTC function of the graphene heating film is increased, the potential safety hazard problem of an existing graphene heating film is eliminated, and the practicability is improved.

A space heater with a linear source of infrared radiant energy in heat exchange relationship with a heat exchanger formed of copper or aluminum material. The copper is pretreated to soften the copper and partially blacken the surface thereof. The aluminum is anodized and electrolytically colored dark. The space heater is thermally more efficient than a comparable space heater wherein the copper or aluminum has not been pretreated. The linear source of infrared radiant energy and heat exchanger are mounted in a heater core that is thermally insulated by an air jacket from an exterior case.

A radiant-tube heater of oxygen-enriched combustion belonging to the field of environmental protection relates to a new method of oxygen-enriched combustion technology applicable to radiant-tube heater, to develop a combustion system of novel industrial radiant tube that combusts the low-calorific value gas (or other fuel gas) to increase the heat utilization, which is characterized in that the heater comprises oxygen or oxygen-enriched air (1), fuel (2), mixed gas (3) of oxygen or oxygen-enriched air and smoke gas, fuel gas (4), smoke gas (5) in the radiant tube, smoke gas (6) discharged from the radiant tube, a smoke gas injector (7), a combustor (8), a boiler wall (9) and a radiant tube (10). The heater has low combusting temperature, low content of harmful gas like NOx in the smoke gas and high heat efficiency, and is good for collecting the smoke, in particular to CO2 and increases the stability and reliability of the system.

The invention discloses a preparation method of a secondary-electron emission thin film. The preparation method comprises the following steps: (1) depositing a buffer layer on a metal substrate; (2) depositing a magnesium oxide and metal mixed layer on the buffer layer by sputtering a magnesium target/magnesium oxide target and sputtering other metal targets; (3) depositing a surface on the magnesium oxide and metal mixed layer. In the step (2), the two targets are used for respectively depositing magnesium oxide and other metals, the sputtering power, the sputtering time, the flow rates of working gas and reactant gas and the temperature of the substrate are individually controlled so as to prepare the magnesium oxide and metal mixed layer with proper magnesium oxide and metal grain size, magnesium oxide crystallization orientation, metal content and distribution of metal grains in a membrane layer and thickness of the membrane layer. The secondary-electron emission thin film prepared by the method has high secondary electron emission yield and good electrical conductivity, and therefore, the secondary-electron emission thin film has high secondary-electron emission stability.

The invention relates to a high-radiation coating applied to the outer wall surface of a rhenium-iridium engine combustion chamber. The high-radiation coating is prepared through the steps of preparing mixed powder by taking HfO2 as a main part and Pr6O11 as an additive part through a roasting process; and after ball milling and sieving the mixed powder, preparing the coating on the surface of the combustion chamber with a rhenium-based iridium coating by taking powder with the particle size of 40-80mu m as a plasma spraying raw material through a plasma spraying technology, wherein the key process parameters are as follows: the voltage is 50-70V, the current is 650-750A, the argon flow is 80-100L/min, the hydrogen flow is 10-12L/min, the supply air rate is 30-50g/min, the service life of the prepared coating can be kept for 8 hours at the temperature of 2000 DEG C, and the radiation coefficient is not lower than 0.85. The high-radiation coating is applied to the outer surface of the rhenium-iridium engine combustion chamber, can be used for effectively reducing radiant heat loss and reducing the wall surface temperature of the combustion chamber and is significant in improving the working reliability of an engine.

The embodiments of the invention provide a fiberizable glass composition prepared from an ingredient composition. The ingredient composition comprises, but not limited to inorganic crystalline minerals, inorganic vitreous minerals, inorganic chemicals and the like.

The invention provides a composite oxidization method of a metal product, which comprises the following steps: the metal product to be treated receives conductive oxidization treatment; an area on the metal product after conductive oxidization treatment to be conducted is shielded; the shielded metal product receives anode oxidization treatment; the shielding of the area is removed. The method can prepare the metal product with low cost and high yield according to the intention of the designer.

The invention discloses a method for measuring the secondary electron emission coefficient of a dielectric material. The method comprises the following steps that: 1) a to-be-measured dielectric material is arranged on a metal sample table; the output ports of the metal sample table, a grid mesh and a collector are connected with the input ports of an acquisition device, voltages applied by the metal sample table and the grid mesh are the same as the voltage of the emission opening of an electron gun, and the potential of the collector is higher than the potential of the metal sample table; 2)the parameters of the electron gun are adjusted, so that an electron beam spot irradiates the surface of the metal sample table and continuously irradiates the surface of the metal sample table for set time; 3) electron energy emitted by the electron gun is adjusted to be energy required to be tested, and the irradiation position of a primary electron beam is adjusted to the surface of the dielectric material, the electron gun is made to emit a pulse electron beam, pulse current I1, pulse current I2 and pulse current I3 of the closed circuits of the metal sample table, the grid mesh and the collector are measured and calculated, and the secondary electron emission coefficient delta of the dielectric material under current electron incident energy is calculated according to the formula that delta=(I2+I3) )/(I1+I2+I3).

The invention discloses a dark-color reflective and heat insulation varnish and a preparation method thereof, relating to the field of coatings. The dark-color reflective and heat insulation varnish comprises the following components in parts by weight: 320-380 parts of an elastic emulsion, 40-80 parts of a fluorocarbon emulsion, 220-270 parts of filler, 4-6 parts of a dispersing agent, 3-5 parts of a defoaming agent, 5-10 parts of a film-forming additive, 3-5 parts of a flatting agent, 5-8 parts of a thickening agent, 2 parts of a mildew-proof and alga-proof agent, 2 parts of a bactericide, 3-5 parts of a wetting agent and 200-250 parts of deionized water. The varnish belongs to an environment-friendly coating, not only is high in reflection coefficient and radiation coefficient, free of grinding and good in decoration property, but also does not contain APEO and cannot generate hazards to the environment and human health.

A method of thermographic inspection includes absorbing, at an applique applied to a test area of an article, light from a testing light source. The method further includes emitting, by the applique, thermal radiation directed to a capture device, the thermal radiation corresponding to at least a portion of the light absorbed by the applique.

The invention discloses an e-beam bombardment resistant secondary electron emission composite film and a preparation method thereof, and belongs to the technical field of preparation of functional film materials. By using high-pure metal silver as a substrate material, a magnesium aluminum alloy in a certain atomic ratio as a sputtering source material and high-pure argon-oxygen mixed gas as working and reaction gas, a direct-current reaction magnetron sputtering coating technology is adopted under a certain temperature condition, by adjusting parameters such as sputtering power, sedimentationtime, gas flow ratio and the like, the prepared MgO/Al2O3 composite film has higher secondary electron emission coefficients and better e-beam bombardment resistance performance. By adopting the method, the prepared MgO/Al2O3 composite film has the advantages of controlled thickness of the film, uniform components, high secondary electron emission coefficients, excellent e-beam bombardment resistant performance and the like.

The invention discloses a vacuum cavity embedded aerogel type heat preservation shell for a thermal battery and application of the vacuum cavity embedded aerogel type heat preservation shell. The shell comprises a battery outer shell, a battery inner shell, a reflection infrared radiation layer, a battery cover plate, an aerogel heat preservation cylinder and an aerogel heat preservation block, the battery inner shell is mounted in the middle in the battery outer shell; the reflection infrared radiation layer is arranged on the inner wall of the battery outer shell and the outer wall of the battery inner shell, the battery outer shell surrounds the battery inner shell to form a vacuum heat preservation cavity, and the aerogel heat preservation cylinder is embedded in the cavity of the vacuum heat preservation cavity and located between the reflection infrared radiation layer on the inner wall of the battery outer shell and the reflection infrared radiation layer on the outer wall of the battery inner shell; the aerogel heat preservation block is arranged between the upper layer and the lower layer of the battery cover plate, and the aerogel layer and the vacuum layer are combined into a whole in space, so that the size of the thermal battery is reduced. The heat preservation shell provided by the invention has good thermal insulation performance, and can significantly prolong the thermal life of the thermal battery and reduce the surface temperature of the thermal battery.

The invention relates to the technical field of industrial furnaces, and specifically relates to an energy-saving heating furnace. The energy-saving heating furnace comprises a furnace body end wall and a furnace top, wherein a first black body energy-saving element is arranged on the furnace top, and a refractory fiber module and a second black body energy-saving element are arranged on the furnace body end wall; the diameter ratio of the first black body energy-saving element to the second black body energy-saving element is (1 to 3): 1, and the second black body energy-saving element arranged on the furnace body end wall penetrates through the refractory fiber module arranged on the furnace body end wall. According to the energy-saving heating furnace, the refractory fiber module is arranged on the furnace body end wall of the heating furnace and matched with the first black body energy-saving element arranged on the furnace top, so that the effect of comprehensively saving energy in the furnace body is achieved. When a furnace temperature is higher than 800 DEG C, heat transfer is mainly based on radiation, and radiation heat transfer is more than 15 times of convection heat transfer and accounts for more than 80% of total heat; and the first black body energy-saving element has a high radiation coefficient and plays a role in fully reflecting radiation downwards at the furnace top, so that efficient recycling for the radiation heat of a workpiece is achieved.

The invention relates to a furnace combustion structure having the function of oxygen-supporting combustion, which comprises a combustion nozzle, a combustion supporting air nozzle and a furnace body space, wherein the combustion supporting air nozzle is composed of an upper skew arch above, a lower bottom plate and sidewalls at two sides, the combustion nozzle which is disposed below the combustion supporting air nozzle is provided with 3 horn-shaped oxygen-supporting combustion nozzles (combustor flame is transversely distributed) and is 0.5 to 1 meter away from the furnace body space, and an included angle of 14 degrees is formed between the combustion supporting air nozzle and the combustion nozzle. When a furnace having this structure is in used, fuel is mixed with low-temperature combustion supporting air entering from a heat accumulation chamber so as to result in a carbon separation process and then enters into the high-temperature furnace body for combustion. The structure can improve the uniformity of temperature field in the furnace, enhance the radiation coefficient of fuel-combusting flame and the production quality of metallurgical accessories, and intensify the heat exchange capability of combustion flame and metallurgical accessories, thus fuel consumption, pollutant emission and production cost of metallurgical accessories are all reduced.