65 results about "Liquid gallium" patented technology

The invention belongs to the technical field of liquid metal coating and infiltration in grinding machining, and particularly relates to a temperature-control ultrasonic composite liquid gallium auxiliary grinding device and method for a micro engine blade, and the device comprises a fluid conveying module, a temperature adjusting module, a machining module, an ultrasonic vibration module and an electromagnetic field generator. Temperature control of liquid gallium is achieved by arranging a microwave cavity and a cooling system, stable supply is guaranteed through inert gas and a liquid gallium conveying pipeline, and uniform coating and ultrasonic vibration infiltration on the surface of the blade of the micro engine are achieved by combining an ultrasonic transduction assembly and a spraying nozzle. The electromagnetic field generator further enhances the adhesion and lubrication effects of the liquid gallium on the grinding wheel and the blades. The defects of insufficient grinding temperature control and lubrication of a traditional grinding wheel are overcome, the grinding temperature rise and the friction coefficient are effectively reduced, thermal damage and surface deformation are avoided, and the machining precision and the surface quality of complex curved surfaces and tenon tooth parts are improved.

The invention discloses a high-heat-conductivity leakproof liquid metal phase change heat-conducting gasket and a preparation method thereof, and relates to the technical field of heat-conducting gaskets. The preparation method comprises the following steps: alloying high-heat-conductivity low-melting-point liquid metal gallium with high-heat-conductivity metal silver and copper, mixing with a polymer containing a specific functional group, adding a modified heat-conducting filler, and carrying out UV curing to form the heat-conducting gasket. Liquid metal is easily alloyed to form eutectic alloy, the melting point can be increased, a chemical cross-linked network formed by the modified heat conduction filler and UV curing can make up heat conduction loss, a heat conduction path is established, the interface thermal resistance is reduced, and the heat conduction efficiency is remarkably improved. The surface oxide layer interacts with the polar group of the polymer, and the steric hindrance effect of the cross-linked network is combined to synergistically realize the leak-proof effect. The high-heat-conductivity leakproof liquid metal phase change heat-conducting gasket prepared by the invention has the effects of high heat conductivity and leakproof.

The invention discloses a liquid metal-based catalyst with flowable amorphous cobalt active sites as well as a preparation method and application of the liquid metal-based catalyst. The spherical gallium-based liquid metal loaded amorphous cobalt nanosheet material is synthesized by using a sodium borohydride ice bath method. Due to the optimization of the synthesis process, the amorphous cobalt nanosheets are uniformly distributed on the surfaces of the liquid gallium balls, are small in size, are high in utilization rate and are not easy to agglomerate; the intrinsic flow characteristic of the liquid metal gallium realizes the efficient reverse hydrogen overflow effect, optimizes the formation process of a catalytic reaction intermediate, and accelerates the formation of the intermediate. The composite material has the advantages of low overpotential, high Faraday efficiency, high ammonia production rate, good stability and the like during nitrate electrocatalytic reduction reaction, meets the requirements of production and use, and is low in preparation cost.

The invention discloses a gallium-based liquid metal conductive hydrogel and a preparation method and application thereof.The method includes the steps that firstly, liquid metal gallium is modified through an amphiphilic block copolymer, so that the liquid metal gallium can be stably dispersed in a hydrogel precursor solution, hydroxyl radicals are generated through the liquid metal gallium, and the hydrogel precursor solution is formed; in-situ polymerization of an ionic liquid monomer and an acrylic acid monomer is further initiated to form a second network in the dual-network hydrogel, and the second network cooperates with a borate bond cross-linked polyvinyl alcohol first network to prepare the liquid metal-based conductive hydrogel with excellent conductivity, good mechanical properties and relatively strong interface adhesion. The problems that existing conductive hydrogel is poor in conductive filler compatibility, poor in liquid metal interface stability and the like are solved.

The invention relates to the technical field of heat exchange, and particularly discloses a gallium-based alloy composite working medium and a preparation method thereof.The gallium-based alloy composite working medium comprises a main heat transfer fluid and nano particles dispersed in the main heat transfer fluid, and the main heat transfer fluid is liquid gallium-based alloy; the nano particle comprises a metal core, a non-metal shell layer coated outside the metal core and a carbon nano material layer coated outside the non-metal shell layer. The carbon nanomaterial is modified on the surface of the non-metal shell layer, the dispersion condition of nanoparticles in liquid metal is effectively improved, and meanwhile, the carbon nanomaterial can effectively mask silicon hydroxyl on the surface of the non-metal shell layer and prevent self-polymerization tendency between the non-metal shell layers by modifying the surface of the non-metal shell layer.

The invention discloses a double-carbon material reinforced gallium-based composite heat conduction paste and a preparation method thereof.The method comprises the steps that firstly, liquid gallium, indium particles and tin powder are weighed according to a certain mass ratio and mixed, and gallium-based liquid metal is obtained after heating and stirring; weighing a carbon material, the modified micro powder and molten salt, uniformly mixing, reacting in a tubular furnace under the protection of high-purity argon, cooling to room temperature, and washing, pickling, filtering and drying the mixture to obtain a metallized modified carbon material; adding the modified carbon material into the gallium-based liquid metal, mixing, heating, stirring, compressing and grinding to prepare the double-carbon material reinforced gallium-based composite heat-conducting paste. According to the invention, the problem of poor wettability in the bonding process of a carbon material reinforced phase and a liquid metal matrix can be effectively solved, and the heat-conducting property of the gallium-based composite heat-conducting paste is improved.

A latent heat storage body microcapsule includes a core including gallium or gallium alloy; and a shell covering the core and including gallium oxide. A method for producing the same includes a particle-forming step of forming gallium or an alloy of gallium in a liquid state into particles; a water treatment step of heating the particles in distilled water to form a gallium hydrate on a surface of each of the particles; and an oxidation treatment step of oxidizing the gallium hydrate to form a shell including gallium oxide. The method includes a particle-forming step of forming gallium or an alloy of gallium in a liquid state into particles; a cooling step of cooling the particles to a solid state; and a pH treatment step of immersing the particles in an aqueous solution having a predetermined pH to form a shell including gallium hydrate.

The application provides a bubble behavior test device and method for simulating a liquid metal cooled reactor, and belongs to the technical field of nuclear engineering. The device aims to solve the problems of high operating temperature, large power consumption and poor safety of a traditional experimental loop using lead-bismuth alloy as a liquid phase medium, and the shortcoming that a traditional contact type measurement method easily causes disturbance to the flow characteristics of fluid. The bubble behavior test device for simulating the liquid metal cooled reactor comprises a flow channel body, a rod bundle matrix and liquid gallium-indium-tin alloy metal arranged in the flow channel body, and a plurality of gas check valves arranged on each rod of the rod bundle matrix; an inert gas output assembly is provided with a plurality of gas output ports and is connected with the gas injection ports on each rod of the rod bundle matrix; an ultrasonic probe array is arranged on the side of the rod bundle matrix and in the central rod; and a fluid circulation assembly is connected with the flow channel body at the inlet end and the outlet end and is used for driving the fluid in the flow channel body to move from top to bottom and separating the gas from the flow channel body. The device is mainly used for simulating the bubble behavior of the liquid metal cooled reactor.

The application discloses a radiation refrigeration coating with a recyclable function and a preparation method thereof, and belongs to the technical field of refrigeration coatings.The coating is composed of base oil 500SN, hollow silica microspheres (SiO2@APTES) modified by a silane coupling agent, a liquid metal-based crosslinking agent (GLM) composed of a self-prepared urea-based monomer (UM), cetyl methacrylate (CMA) modified liquid gallium (Ga), talcum powder, calcium carbonate, ethylene glycol butyl ether, polyacrylate, methyl ethyl ketone oxime and methyl methacrylate.The GLM crosslinking agent in the coating has a reversible thermal stimulation response, can reversibly perform phase conversion under thermal stimulation, and simultaneously endows the coating with recyclable performance.Meanwhile, the introduction of the SiO2@APTES realizes high reflection of sunlight and high emission of a medium and far infrared band, and guarantees excellent radiation refrigeration performance of the coating.

The present disclosure provides: a precursor composition for depositing a thin film including a liquid indium precursor, a liquid gallium precursor, and a liquid zinc precursor; a method for manufacturing a thin film by using the precursor composition; a thin film manufactured by using the precursor composition; and an electronic device including the thin film.

The application discloses a liquid gallium ion source and a gallium ion emission method. The liquid gallium ion source comprises an insulating base, a gallium storage container arranged below the insulating base, the gallium storage container having a containing cavity in which a gallium source is stored, an emission needle fixedly connected with the gallium storage container and extending downward along an axial direction of the gallium storage container from a bottom of the gallium storage container, a heating wire at least partially located in the containing cavity of the gallium storage container and in contact with the gallium source, an electrode assembly comprising first and second column electrodes fixedly and spacedly arranged in the insulating base and used for being fixedly electrically connected with two ends of the heating wire respectively, and a fixing assembly fixedly arranged in the insulating base and fixedly connected with the emission needle, the fixing assembly being not in contact with the heating wire. The application can improve the thermal efficiency of the liquid gallium ion source, reduce ion beam deviation caused by thermal deformation of the emission needle and as far as possible prolong the service life of the liquid gallium ion source.

The invention discloses a self-adaptive magnetic field regulation and control magnetic control directional crystallization process in high-purity gallium production, which comprises the following steps: step 1, raw material pretreatment: putting a gallium raw material containing impurities into a smelting furnace, and heating to a temperature above a melting point, so that the gallium raw material is completely molten into liquid gallium; waste heat is recovered through a heat exchange device in the melting process and is used for preheating subsequent raw materials or other production links; 2, setting a self-adaptive magnetic field: transferring the liquid gallium into a crystallization container with a magnetic field generating device; step 3, accurate temperature control: arranging a plurality of coil heating units and water pipe cooling units outside the crystallization container, and arranging temperature sensors at different heights inside the crystallization container; step 4, crystal separation and post-treatment; the self-adaptive magnetic field regulation and control magnetic control directional crystallization process in high-purity gallium production can ensure the purity and quality of crystals through magnetic field regulation and control during use, can also effectively utilize the waste heat of equipment, reduces the production cost, and is suitable for popularization and application.

The application is a preparation method of fly ash porous hollow microspheres with controllable aperture, which can prepare fly ash porous hollow microspheres with controllable aperture, and the specific process is as follows: the fly ash hollow microsphere FAC raw material is sequentially passed through a 150-mesh screen, and the undersize part is the first particle size range; then it is continuously passed through a 60-mesh screen, and the undersize part is the second particle size range; then it is continuously passed through a 35-mesh screen, and the undersize part is the third particle size range, and the oversize part of the 35-mesh screen is discarded; the density of the fly ash hollow microsphere FAC in different particle size ranges is measured; the fly ash hollow microsphere FAC is processed in a nanoscale aperture by using a focused ion beam method, the ion source is a liquid gallium ion source, and the working distance is 5 mm; firstly, the acceleration voltage of the focused ion beam is determined according to the density of the fly ash hollow microsphere FAC in different particle size ranges; then the scanning speed of the focused ion beam is determined according to the particle size range. The aperture size of the microspheres obtained by the method is controllable and is in a nanoscale, and the requirements of low thermal conductivity and high strength can be met.

The invention is suitable for the technical field of electro-catalytic material preparation, and provides a preparation method and application of a foamy copper loaded CuGa2 alloy electrode, according to the method, three-dimensional foamy copper is used as a conductive framework, liquid gallium is introduced in an alkaline environment, and a CuGa2 / foamy copper composite structure with a strong interface coupling effect is formed through an in-situ alloying reaction. In the obtained electrode, a continuous metal-metal interface is formed between the CuGa2 alloy and the copper substrate, so that electron transmission and adsorption activation of NO molecules can be effectively promoted, and the reaction rate and selectivity of ammonia generation are remarkably improved. According to the method, the reaction condition is mild, high-temperature heat treatment is not needed, uniform growth of CuGa2 can be achieved under the low-energy-consumption condition, and excellent structural stability is kept. The prepared CuGa2 / foamy copper composite electrode shows high ammonia yield and excellent Faraday efficiency under the condition of 0.1 V (vs. RHE), and shows good catalytic stability and industrial application potential.

The application discloses a method for preparing holmium-gallium alloy based on fused salt electrolysis, and a product and application thereof, and comprises the following steps: S1, preparing purified lithium chloride-potassium chloride fused salt; S2, heating the purified eutectic fused salt to an electrolysis temperature and keeping constant temperature, setting liquid metal gallium as a working electrode, setting high-purity graphite rod as a counter electrode, setting Ag / AgCl as a reference electrode, adding holmium chloride into the molten fused salt, and the added mass of the holmium chloride is 2%-4% of the total mass of the fused salt; S3, maintaining the electrolysis temperature unchanged, setting the electrolysis potential and time required by the electrolysis experiment, and ensuring that holmium ions are reduced on the surface of the liquid gallium cathode and alloying reaction occurs during the electrolysis process; S4, after the electrolysis is completed, power is cut off, the electrolysis device is naturally cooled to room temperature, the cathode alloy product is collected after standing and layering, and the holmium-gallium alloy is obtained after washing and drying treatment. The application realizes efficient, stable and controllable preparation of the holmium-gallium alloy.

The present application relates to a kind of forming grinding method for thin-walled gear, belong to the lubrication cooling technical field in grinding processing, method as follows: liquid gallium is transported to the detachable sealed gallium delivery box of electrostatic spraying module, part of liquid gallium in detachable sealed gallium delivery box enters pressurized pipeline pressurization;Part of liquid gallium enters electric field application cavity, realizes particle charging atomization under the action of electrostatic field and is sent to uniform electric field duct.Switch off control switch at the same time, after the electric field in uniform electric field duct is stable, liquid gallium in pressurized pipeline flows into uniform electric field duct.In the uniform field effect, liquid gallium in uniform electric field duct is uniformly charged atomization, and charged liquid gallium after atomization is sprayed to workpiece surface.Grinding workpiece surface, temperature control module adjusts workpiece surface temperature in real time, maintains the state of dynamic conversion between liquid gallium and solid liquid.The present application effectively solves the problem that cooling liquid is difficult to penetrate to the depth of tooth surface in thin-walled gear forming grinding, and improves the quality and efficiency of forming grinding.

The present application relates to a kind of forming grinding device for grinding thin-walled gear, belong to the lubrication cooling technical field in grinding processing, including electrostatic spraying module, temperature regulation module and grinding wheel;Grinding wheel has inner runner, electrostatic spraying module sprays liquid gallium to the workpiece surface ground by grinding wheel;Electrostatic spraying module includes pressurizing module, charge application module and conveying module;After liquid gallium is transported to detachable closed gallium delivery box, part is pressurized after entering uniform electric field conduit by pressurizing pipeline, part enters the electric field particle charging by detachable closed gallium storage cavity, and is sent to uniform electric field conduit, under the action of electric field, all liquid gallium in uniform electric field conduit is uniformly charged, and is sprayed to workpiece surface by conveying module;The temperature regulation module adjusts workpiece surface temperature, maintains liquid gallium solid-liquid conversion.The present application effectively solves the problem that coolant is difficult to penetrate to the depth of tooth surface in thin-walled gear forming grinding, and improves the quality and efficiency of forming grinding.

The application discloses a method and device for batch production of high-purity gallium oxide without solvent and catalyst, and particularly relates to the technical field of semiconductor material preparation, and comprises the following steps: (a) placing metal gallium into a crucible, and forming liquid gallium by vacuumizing and heating treatment; (b) performing mechanical crushing treatment on the liquid gallium for multiple times to obtain micron to nanometer gallium particles; (c) performing grading separation on the gallium particles obtained in the step (b) to collect ultra-fine gallium particles; (d) sending the ultra-fine gallium particles into a reactor to perform multistage oxidation reaction with oxygen to generate Ga2O3 crystal grains in a polymorphic form; (e) performing high-temperature treatment on the Ga2O3 crystal grains in the polymorphic form to convert the Ga2O3 crystal grains into molten and stable state beta-Ga2O3 crystal grains; and (f) performing rapid cooling and solidification on the molten and stable state beta-Ga2O3 crystal grains to obtain beta-Ga2O3 powder or particles. The application lays a solid foundation for obtaining electronic-grade ultra-high-purity beta-Ga2O3 powder.

The invention discloses a refining system and a refining method of crude gallium. The refining system comprises a first acid pickling reaction device, a second acid pickling reaction device, a third acid pickling reaction device and a fourth acid pickling reaction device, the cleaning and impurity removing device is connected to the first acid pickling reaction device and is configured to receive the liquid gallium obtained after acid pickling and perform washing and impurity removing so as to obtain refined gallium; the second pickling reaction device is connected to the cleaning and impurity removing device and is configured to receive the refined gallium and the diluted hydrochloric acid solution and perform pickling treatment; the separation device is used for separating the material pickled by the second pickling reaction device to obtain high-purity liquid gallium; the checking device is used for receiving the high-purity liquid gallium and checking whether the high-purity liquid gallium is qualified or not; the packaging device is used for receiving the qualified high-purity liquid gallium and packaging the qualified high-purity liquid gallium; wherein the first acid pickling reaction device is further used for receiving unqualified high-purity liquid gallium. The coarse gallium is refined through the steps, so that the impurity removal effect and the production efficiency are improved.

The invention provides a stimulus-responsive elastic composite material based on liquid metal phase change and a preparation method thereof, and the preparation method comprises the following steps: taking liquid metal gallium, liquid gallium-zinc alloy or liquid gallium-tin alloy as a matrix, adding a nano heterogeneous nucleating agent X into the matrix, carrying out ultrasonic dispersion, heating and uniformly mixing to prepare Ga-X heterogeneous nucleation particles, wherein the lattice mismatch degree of the nano heterogeneous nucleating agent X is lt; the particle size of the nano heterogeneous nucleating agent is 30 to 60 nm; and uniformly stirring the Ga (at) X heterogeneous nucleation particles, thermochromic powder and a PVA elastomer, preheating, and curing to obtain the stimuli-responsive elastic composite material. The nano heterogeneous nucleating agent X is introduced into the liquid metal, the nucleating behavior of the liquid metal is adjusted, the phase change energy barrier is reduced, the response capacity to external stimulation is enhanced, and the liquid metal elastomer composite material is prepared from the nano heterogeneous nucleating agent X, the PVA elastomer and the thermochromic powder.

The application discloses a method and device for detecting impurity element zinc in high-purity gallium. The detection method comprises the following steps: taking a mixed centrifugal extraction tube, adding a high-purity gallium sample, adding a solution containing a high-purity extractant, sealing the mixed centrifugal extraction tube, fixing the mixed centrifugal extraction tube horizontally on a mixed oscillation extractor, performing oscillation extraction, taking out the mixed centrifugal extraction tube, vertically storing the mixed centrifugal extraction tube, making liquid gallium gather at the conical bottom of the mixed centrifugal extraction tube, separating the extraction liquid, and using internal standard calibration ICP-MS to detect the impurity zinc content. The volume concentration of the high-purity extractant in the solution containing the high-purity extractant is 1-10%, and the high-purity extractant is selected from one of hydrochloric acid, nitric acid and sulfuric acid. The detection method provided by the application has the advantages of simple process, short flow, easy operation, fast extraction and separation speed, clean matrix removal, complete impurity retention and good reproducibility.

This invention relates to a composite phase change film material and its preparation method based on a dual-functional filler reinforcement, belonging to the field of phase change composite material technology. The method includes the following steps: The composite phase change film comprises a poly(p-phenylbenzobisoxazole) nanofiber substrate, phase change microcapsules, liquid gallium metal modified with thermally conductive boron nitride nanosheets, and thermochromic ink. The prepared liquid gallium metal modified with boron nitride nanosheets has a core-shell structure with an average particle size of 576.9 nm. The prepared composite phase change film possesses excellent thermal conductivity, high heat storage performance, outstanding mechanical properties, and flexibility. Furthermore, this composite phase change film exhibits passive thermal management and active safety warning effects, achieving a dual thermal protection function combining visual cues for heat storage and temperature control. In a small car model, it not only triggered a blue-to-yellow color transition at 50°C, providing an intuitive temperature warning, but also achieved a temperature suppression effect of 5.9°C.

The invention relates to a method for reducing ceramic sintering temperature by using liquid gallium-based metal as a sintering aid, and belongs to the technical field of ceramic preparation. The method comprises the following steps: performing ultrasonic treatment on liquid gallium-based metal to obtain gallium-based nano liquid drops; uniformly mixing the gallium-based nano liquid drops and ceramic powder, and performing vacuum drying after ball milling to obtain a ceramic / gallium-based metal mixture; grinding the ceramic / gallium-based metal mixture into powder, and tabletting to obtain a ceramic / gallium-based metal mixture sheet; and calcining the ceramic / gallium-based metal mixture sheet to obtain the high-density ceramic. Compared with the sintering temperature of a normal-temperature sintering mode, the sintering temperature of the ceramic can be reduced by 300-400 DEG C and the density of the ceramic can reach more than 95% by using the liquid gallium-based metal as the sintering aid.

This utility model relates to the field of high-purity gallium production technology, specifically a continuous crystallization apparatus for high-purity gallium production. It includes a boat-shaped crucible with a crystallization tank and a crystal storage tank at its top. A crystallization retrieval mechanism is installed on the boat-shaped crucible, comprising a movable frame and a rotating belt. The movable frame includes a pair of parallel support plates, and several rows of retrieval rods are fixed to the outer surface of the rotating belt. This continuous crystallization apparatus for high-purity gallium production, through its flip-up crystallization retrieval mechanism, allows the retrieval rods fixed to the outer surface of the rotating belt to promptly transfer the crystallized gallium crystals from the crystallization tank to the crystal storage tank, enabling continuous retrieval of the crystallized gallium crystals. This avoids the formation of large crystal clumps due to prolonged residence in liquid gallium, facilitating subsequent gallium quality testing.

This invention proposes a high-load gear forming grinding method based on the local phase transition strengthening effect of liquid gallium assisted by ultrasonic rapid cooling. When room-temperature liquid gallium is transported from a constant-temperature storage tank to an ultrasonic atomizing device, the liquid gallium metal is vibrated by ultrasonic waves into atomized particles, which are then propelled forward. Due to the rapid increase in kinetic energy and decrease in internal energy, the ejected liquid gallium atomized particles quickly condense, forming a solid-liquid transition state. The direction of movement of the ejected liquid gallium droplets is controlled by charging electrodes and deflection electrodes, focusing the precise ejection of liquid gallium droplets into the core grinding area. During the solid-liquid transition process of the liquid gallium particles, a large amount of heat energy is rapidly absorbed on the gear processing surface. After thermal melting, gallium atoms react with titanium atoms to form a metastable gallium titanate compound, achieving local phase transition strengthening of the high-dynamic-load gear. This method utilizes the local phase transition strengthening effect of the liquid gallium solid-liquid transition process to significantly enhance the metal strength and toughness of the high-dynamic-load gear, which is in line with the concept of green development.

The application discloses a method for preparing gallium-based liquid metal thermal interface material by coating Ga2O3 on diamond particles. The method comprises the following steps: firstly, preparing gallium-based liquid metal by heating metal gallium, indium and tin with a specified ratio; secondly, coating Ga2O3 on the surface of specified diamond particles by low-pressure chemical vapor deposition after ultrasonic cleaning, wherein liquid gallium and high-purity oxygen are used as precursors, and high-purity argon is used as a protective gas; thirdly, mixing the prepared gallium-based liquid metal and the diamond particles coated with Ga2O3 and stirring in an oxygen-free environment; and fourthly, preparing high-thermal-conductivity gallium-based liquid metal thermal interface material after the interface wetting of the mixed composite material is regulated by Ga2O3 through ultrasonic-assisted wetting. The method can finely regulate the layer thickness of Ga2O3 between two phases, efficiently utilize Ga2O3 to improve the interface wetting, and reduce the negative effect of low thermal conductivity of Ga2O3 to the minimum, so that the gallium-based liquid metal thermal interface material with high thermal conductivity is finally prepared.

This invention discloses a method for preparing rare-earth oxide / gallium oxide magnetoresistive composite thin films based on multi-source thermal resistance evaporation. The method includes: providing at least two evaporation raw materials, each independently selected from core-shell structured rare-earth oxide / gallium oxide composite particles or separately packaged rare-earth oxide precursor powder mixed with a homogeneous suspension of liquid gallium metal; after pretreatment of the substrate, placing the at least two evaporation raw materials in multiple evaporation boats, and forming a wet film using sequential evaporation or co-evaporation; finally, performing a flash calcination treatment under oxygen-rich conditions to obtain the composite thin film. Sequential evaporation can obtain multilayer thin films with different compositions; co-evaporation can obtain a single-layer mixed-component thin film. This invention allows for flexible control of the composition, thickness, and interface structure of the thin film through multi-source thermal resistance evaporation, enabling the preparation of single-layer mixed-component or multilayer thin films, expanding the design dimensions of magnetoresistive functional materials. Furthermore, the process is stable, the equipment cost is low, and it is suitable for large-scale production.

The present invention belongs to the field of semiconductor device technology and relates to a method and application for suppressing the persistent photoconductive effect of gallium oxide. The method comprises: providing a crystalline gallium oxide material and preheating the crystalline gallium oxide material; the preheating temperature is not lower than the melting point of metallic gallium; spreading liquid gallium in air, forming an amorphous gallium oxide film layer on the surface of the spread liquid gallium; while maintaining the liquid gallium in a liquid state, contacting the preheated crystalline gallium oxide material surface with the amorphous gallium oxide film layer on the surface of the liquid gallium, thereby transferring the amorphous gallium oxide film layer to the surface of the crystalline gallium oxide material; and nitriding, phosphatizing, or sulfiding the amorphous gallium oxide film layer on the surface of the crystalline gallium oxide material, thereby converting the amorphous gallium oxide film layer into a gallium nitride film layer, a gallium phosphate film layer, or a gallium sulfide film layer. The method provided by the present invention not only improves material performance but also significantly increases the response speed of the photodetector device.

The utility model provides a test device for simulating bubble behaviors of a liquid metal cooling reactor, and belongs to the technical field of nuclear engineering. The utility model aims to solve the problems of high operating temperature, high power consumption and poor safety of a traditional experimental loop using lead-bismuth alloy as a liquid phase medium, and the defect that a traditional contact measurement method is easy to cause interference on the flow characteristics of fluid. A liquid metal cooling reactor bubble behavior simulation test device comprises a flow channel body, a rod bundle matrix and liquid gallium indium tin alloy metal are arranged in the flow channel body, and each rod of the rod bundle matrix is provided with a plurality of gas check valves; the inert gas output assembly is correspondingly connected with the gas injection port in each rod of the rod bundle matrix; the ultrasonic probe array is arranged on the periphery of the rod bundle matrix and inside the central rod; and the fluid circulation assembly is used for driving the fluid in the flow channel body to act from top to bottom and separating the gas out of the flow channel body. The device is mainly used for simulating liquid metal cooling reactor bubble behaviors.