11results about How to "Avoid phase change" patented technology

The utility model relates to a divisional application of which the application number is 202420109196.7. The utility model relates to the field of photovoltaic technology, in particular to a conductive adhesive tape and a perovskite solar cell. The conductive adhesive tape comprises a base material layer, a grid conductive layer and a conductive adhesive filling layer, the grid conductive layer and the conductive adhesive filling layer are located on the surface of one side of the base material layer, the grid conductive layer is of a grid-shaped structure and arranged on the surface of the base material layer, and meshes of the grid-shaped structure are filled with the conductive adhesive filling layer. The conductive adhesive tape disclosed by the utility model can be widely applied to the field of building integrated photovoltaics; secondly, the conductive adhesive tape is applied to the perovskite solar cell, and the surface of one side of the substrate layer is provided with a first area, a second area and a third area; and the conductive adhesive tape is arranged on the surface of one side, far away from the substrate layer, of the transparent conductive layer in the first region and the second region, and the conductive adhesive layer and the cell layer are arranged at an interval, so that the electrical property and reliability of the perovskite solar cell are high.

The invention relates to a smooth digital gain control device and method. The device comprises an analog switch gain adjusting module, a digital gain adjusting module, a zero-cross detection module, a gradual-gradual-out control module, a central control unit and an audio signal input / output interface. The method comprises the steps that when the FPGA receives an external gain adjusting instruction, an analog coarse adjustment gear and a digital fine adjustment value corresponding to target gain are calculated, after a zero-crossing trigger signal of the zero-crossing detection module is received, the gradual-gradual-out control module is controlled to execute the gain adjusting action, and the analog switch gain adjusting module is controlled through IO according to the current actual gain value. According to the invention, the analog switch and digital gain adjustment are combined, the 0-66dB wide range and 0.1 dB high precision gain adjustment is realized, the zero-cross detection and gradual-gradual-out mechanism is added, the noise caused by gain change is eliminated, and the stability and the tone quality of audio signal processing are improved.

The present application relates to a kind of transformation condensate resource utilization method.The method includes the following steps: S1, after mixing with sulfuric acid, the transformation condensate is carried out decarburization treatment, and the crude ammonium sulfate solution is obtained;S2, under the action of catalyst, the crude ammonium sulfate solution is reacted with oxidizing agent, and the refined ammonium sulfate solution is obtained;Oxidizing agent includes one or more of hydrogen peroxide, ozone and persulfate.The method of the present application is suitable for different scale transformation condensate treatment process, and has the following characteristics: waste material recycling, recovery rate is more than 99.0%, product added value is high, and economic benefit is good;Avoid the phase change process of water, and energy consumption is less, energy saving and emission reduction;Process flow is simple, and processing efficiency is high;Avoid secondary pollution;Help coal chemical industry enterprise to realize plant material self circulation, and generate good economic benefit by-product.

This invention discloses a method for in-situ laser-arc composite cladding of boiler heating surfaces, relating to the field of laser beam processing technology. The method includes: removing the corrosion layer and oxide film from the area to be repaired using dry ice blasting and laser; maintaining water cooling on the back side of the area to be repaired; pausing after each cladding section to allow the interlayer temperature to drop to 200℃-250℃; sequentially cladding the underlayer, transition layer, and wear-resistant layer; after each cladding layer is completed, the surface is treated with laser shock peening; when an abnormal enhancement of the Fe I spectral line at 435.2 nm is observed, it is determined to be "excessive dilution"; when a high-frequency burst signal of 80kHz-120kHz appears in the acoustic emission signal, it is determined to be "microcrack formation". This invention enables rapid repair of large-area heating surfaces with high bonding strength, low heat input, and no cracks, under in-situ boiler conditions without disassembly, overall preheating, and with a cooling medium on the back side.

This invention discloses an iron-based multimetallic catalytic material, its preparation method, and its application, belonging to the field of catalyst preparation technology. The preparation method includes: dissolving two or more water-soluble metal salts with different hydroxide solubility products in water to obtain a mixed solution A; dissolving potassium ferrate in cold water to obtain solution B; pouring solution B into mixed solution A under stirring to obtain mixed solution C; allowing the solution to settle at low temperature until the supernatant changes color from dark purple to light purple and reaches neutral pH, then filtering, washing, and drying to obtain a precursor; calcining the precursor in a mixed atmosphere of hydrogen and argon to obtain the iron-based multimetallic catalytic material. This material has a multi-layered enclosed microstructure, with metal oxides of high hydroxide solubility products located on the periphery and those of low solubility products located inside, achieving a gradient arrangement and synergistic effect of metal components. The process of this invention is simple and the conditions are mild. The obtained catalyst exhibits high catalytic activity, high selectivity, and excellent stability in the countercurrent water-gas reaction.

The invention discloses an iron-based multi-metal catalytic material as well as a preparation method and application thereof, and belongs to the technical field of catalyst preparation. The preparation method comprises the following steps: dissolving more than two metal water-soluble salts with different hydroxide solubility products in water to obtain a mixed solution A; dissolving potassium ferrate in cold water to obtain a solution B; pouring the solution B into the mixed solution A while stirring to obtain a mixed solution C; after the color of the supernate becomes light purple from dark purple and the pH is neutral, suction filtration, washing and drying are performed, and a precursor is obtained; and calcining in a mixed atmosphere of hydrogen and argon to obtain the iron-based multi-metal catalytic material. The material is of a multi-layer surrounding type microstructure, metal oxides with high hydroxide solubility products are located on the periphery, metal oxides with low hydroxide solubility products are located inside, and gradient arrangement and synergistic effect of metal components are achieved. The method is simple in process and mild in condition, and the obtained catalyst shows high catalytic activity, high selectivity and excellent stability in the reverse water gas reaction.

This application discloses an in-situ doped TiO2 core-shell structure powder with a wide particle size range, its preparation method, and its applications. The powder has a rutile core@anatase shell structure, with dopant elements enriched in the shell through chemical bonding. The preparation method utilizes an integrated "alkali treatment-acid treatment-low-temperature crystallization" process: rutile phase TiO2 is embedded with cation dopant via an alkaline hydrothermal reaction to form an alkali metal titanate shell; then, acid treatment replaces the anion dopant to construct a hydrotitanate shell; finally, low-temperature calcination yields the core-shell structure. This technology utilizes a dynamic surface reconstruction window to simultaneously integrate doping, overcoming particle size limitations (nanometer to centimeter scale). The resulting material exhibits highly efficient photocatalytic degradation performance of organic pollutants in water under visible light, making it suitable for engineering applications. Its innovation lies in simultaneously completing structure construction, doping integration, and crystallization, avoiding the complexity and defects of step-by-step processes, combining technological advancement with practicality.

This invention discloses an ultrasonic vibration electrolytic grinding composite spindle component in the field of grinding composite spindle technology, comprising an insulating shell; a hollow spindle rotor; an ultrasonic vibration mechanism connected to the hollow spindle rotor and used to generate and transmit axial ultrasonic vibration; a rotary drive device for driving the hollow spindle rotor and the ultrasonic vibration mechanism to rotate together; and an electrolysis mechanism including a conductive slip ring and an electrolyte delivery assembly, the electrolyte delivery assembly being used to deliver electrolyte to the grinding area at the front end of the hollow spindle rotor; wherein, the first electrical channel of the conductive slip ring is electrically connected to the ultrasonic vibration mechanism for transmitting high-frequency electrical signals; the second electrical channel of the conductive slip ring is electrically connected to the tool mounting end of the hollow spindle rotor for transmitting direct current for electrolytic machining. This composite spindle component, by integrating ultrasonic vibration, electrolytic machining, and high-speed grinding processes, overcomes the fundamental technical bottlenecks of low material removal rate, severe thermal damage, and rapid tool wear in traditional single ultrasonic grinding.

The invention relates to the technical field of agricultural production, and particularly discloses a preparation and use method of a chitosan oligosaccharide antifreeze agent, the antifreeze agent comprises the following components by weight: 1-3 g / L of potassium dihydrogen phosphate, 0.01-0.03 mg / L of brassinolide, 0.5-1 g / L of amino acid, 25-50 mg / L of chitosan oligosaccharide powder (10%), 0.01-0.04 mg / L of glutamic acid, 0.01-0.04 mg / L of lysine, 0.2-0.4 mg / L of pyruvic acid, 0.1-0.2 mg / L of citric acid, 0.01-0.02 mg / L of glycerin, 20-50 g / L of an emulsifier, and the balance of water. 10-20 g / L of SiO2 nano-particles and a trace element fertilizer; according to the invention, through cooperation of the elements in the agent, on the basis of supplementing nutrient elements of plants, the lignification degree of the plants is enhanced, the freezing resistance of the plants is enhanced, the plants are induced to generate stress resistance, the SiO2 nanoparticles are added, so that the anti-freezing agent is adsorbed in the nanoparticles, slow release of the drug effect of the anti-freezing agent can be realized, and the anti-freezing effect of the plants is improved. The pesticide effect timeliness after single-time spraying of the anti-freezing agent is prolonged.

This invention discloses a method for live pipeline leak sealing based on in-situ metal growth and its application, belonging to the field of online repair technology for pressurized pipelines. The method includes: pre-treatment of the leaking area; forming a repair layer consisting of a metal transition layer and a metal-ceramic composite layer in the leaking area using low-temperature solid-state deposition technology without interrupting pipeline operation; and finally, post-treatment of the repair layer by shot peening and low-temperature laser polishing to improve its density and surface properties. This invention employs low-temperature processes such as cold spraying, completely avoiding the risks of hot work operations and achieving safe and efficient repair under pressurized pipeline conditions. The gradient functional repair layer formed by this invention has high bonding strength with the pipeline substrate and excellent corrosion resistance and erosion resistance, making it particularly suitable for repairing pressurized pipeline leaks in the power, chemical, and marine engineering fields where continuous production is required.

The invention relates to the technical field of battery current collector processing, in particular to battery current collector surface micropore processing equipment which comprises an unwinding unit, a processing unit and a winding unit which are sequentially arranged along a processing path, the processing unit comprises a surface pretreatment device used for carrying out plasma treatment on the surface of the current collector; the micropore electrolysis device is arranged at the downstream of the surface pretreatment device and is used for carrying out electrolytic machining on the current collector subjected to plasma treatment so as to form micropores; and the post-treatment device is arranged at the downstream of the microporous electrolysis device and is used for cleaning and drying the current collector subjected to electrolytic machining. Therefore, the problems of poor machining precision, low production efficiency, high implementation cost and unstable product quality of a current collector surface micromachining technology in the prior art to different degrees can be solved.