488 results about "Laser heating" patented technology

A method of making a vacuum insulating panel, the vacuum insulating panel comprising a first glass substrate, a second glass substrate, a plurality of spacers provided in a gap between at least the first and second glass substrates, and a seal provided between at least the first and second glass substrates, the seal comprising a first seal layer and / or a second seal layer. The method may include laser heating, using a laser beam from a continuous wave near-IR laser, seal material in order to form the first seal layer; wherein the laser heating may include causing the laser beam to move at a lateral speed of from about 5-70 mm / second relative to the substrates and the first seal material so that the laser beam at least partially passes through at least one of the glass substrates and impinges upon at least the second seal layer in order to heat the second seal layer and fire and / or sinter the first seal material thereby forming the first seal layer.

A method of making a vacuum insulating panel including a first substrate, a second substrate, a plurality of spacers provided in a gap between at least the first and second substrates, and a seal provided between at least the first and second substrates, the seal comprising a first seal layer, and optionally second and / or third primer layer(s). The method may include at least one of: (i) laser heating, using a laser beam from a laser, the first seal material for firing and / or sintering the first seal material to form the first seal layer, in a manner that causes TeO4>TeO3 in the first seal material to transform into TeO3>TeO4 due to said laser heating, whereby an amount of TeO4 decreases and an amount of TeO3 increases due to said laser heating, and / or (ii) laser heating in a manner that causes V2O5>VO2 in the first seal material to transform into VO2>V2O5 due to said laser heating whereby an amount of VO2 increases and an amount of V2O5 decreases due to said laser heating, so that after said laser heating the first seal layer comprises more VO2 than V2O5 by wt. %.

A method of making a vacuum insulating panel, the vacuum insulating panel including a first glass substrate, a second glass substrate, a plurality of spacers provided in a gap between at least the first and second glass substrates, and a seal provided between at least the first and second glass substrates, the seal comprising a first seal layer. The method may include: providing first seal material for the first seal layer in a location at least partially between at least the first and second glass substrates; laser heating, using a laser beam from a continuous wave near-IR laser, the first seal material in order to form the first seal layer; wherein said laser heating may comprise using the laser beam, having a size of from about 2-15 mm, so that the laser beam at least partially passes through at least one of the glass substrates to fire and / or sinter the first seal material thereby forming the first seal layer, in a manner so that the first seal layer a density of from about 2.8-4.0 g / cm3; and after forming the first seal layer, evacuating the gap to a pressure less than atmospheric pressure.

The invention relates to the technical field of steel structure welding assembly, and discloses a dynamic cooperative control steel structure welding assembly production line and an operation method thereof, which are used for automatic welding and deformation correction of H-shaped steel components. The production line comprises a feeding area, an assembling area, a welding station and a correction detection area. Global cooperative control is achieved through a distributed supporting system, a multi-dimensional sensor monitoring system and a cooperative robot system. The distributed supporting system is composed of dynamic roller bed units, the supporting height is adjusted in real time through a pressure sensor array and a micro hydraulic actuator, and workpiece droop is counteracted. The multi-dimensional sensor monitoring system collects temperature, strain and morphology data in real time; the welding robot and the correction robot synchronously apply electromagnetic stirring to optimize a welding seam during welding, and ultrasonic peening and laser heating are combined to reduce residual stress during correction. The industrial control computer dynamically adjusts welding parameters, supporting force and a correction strategy through sensor data, and high-precision straightness and low-residual-stress control is achieved.

The invention discloses a laser cladding temperature field analysis method based on a finite element simulation method. A metal flat plate is used as a research object. ANSYS software is adopted for simulation. A laser cladding process is simulated by constructing a finite element model and a refined mesh in combination with a moving Gaussian heat source and birth-death unit technology, and simulated laser heating is applied to the surface of a part as a thermal load. The ANSYS processing unit calculates a simulation result, and the postprocessor displays temperature field distribution. Simulated and actual coating cross section molten pool shapes are compared, it is found that the size of a simulation model is highly consistent with the size of an actual molten pool, the maximum error is only 9%, and the reliability of numerical simulation is verified. According to the method, a solid theoretical basis and an effective simulation means are provided for the metal laser cladding process, the process research level is improved, and the development cost is reduced. The method has an important value for practical engineering application, and provides a scientific basis for optimizing the laser cladding technology.

The invention provides a temperature control system of an electrostatic adsorption disc and an improvement method of temperature control performance. According to the system, a temperature control layer is arranged in an electrostatic adsorption disc, and the temperature control layer comprises a graphite heat absorption layer and a graphene heat conduction layer; the system further comprises a laser generator and a controller. During working, the laser generator emits heating laser to the graphite heat absorption layer, so that the graphite heat absorption layer efficiently absorbs energy to generate heat, and then the heat is quickly and uniformly conducted to the surface of the electrostatic adsorption disc through the graphene heat conduction layer with ultrahigh heat conductivity. Laser heating is used for replacing traditional resistance heating, graphene heat conduction is used for replacing traditional metal heat conduction, the method has the advantages of being high in temperature switching speed, high in control precision, good in temperature uniformity and the like, and the temperature control performance of the electrostatic adsorption disc can be remarkably improved.

The invention provides an online detection and compensation method for local decarburization of a high-strength spring steel band, which comprises the following steps: arranging an oxygen content sensor in a continuous annealing furnace to monitor oxygen concentration in real time, and marking a potential decarburization risk section; scanning the risk section steel strip by adopting infrared thermal imaging, and generating a carbon distribution map to position a decarburization area; pulse laser heating is conducted on the decarburization area, and methane-argon mixed gas is introduced to achieve in-situ carburization; and finally, local thermal stress is eliminated through high-frequency induction heating. According to the method, decarburization risk dynamic early warning, defect accurate positioning, local efficient carbon supplementation and stress homogenization control are achieved, and the surface quality and fatigue performance of the steel strip are remarkably improved.

The invention discloses a temperature-controllable laser heating device and method, and relates to the technical field of laser heating, and the device comprises a laser generator which is used for generating a laser beam for heating; the triangular prism assembly is arranged on the same side of the laser generator and the detection control module and is used for refracting the laser beams to irradiate the power equipment for heating and refracting infrared radiation generated by the power equipment to irradiate the detection control module; the detection control module is used for detecting the infrared radiation so as to obtain the actual temperature of the heating point of the power equipment, and adjusting the output power of the laser generator based on the actual temperature and the preset temperature so as to control the deviation between the preset temperature and the actual temperature; the laser beam is refracted to irradiate the power equipment for heating, the actual temperature of the heating point is obtained, the output power of the laser generator is adjusted based on the actual temperature and the preset temperature, the device can be used without modification, and the problems of randomness of training content and concealment of examination content are solved.

The invention relates to the technical field of material corrosion and protection, discloses a TP2 copper corrosion behavior testing method based on temperature regulation and control, and aims to solve the problem that in the prior art, various physical and chemical parameters in the corrosion process are difficult to synchronously obtain under the same microscale, so that a local corrosion dynamics mechanism cannot be deeply revealed. The core of the system is a coaxial three-function composite probe integrated with thermal, acoustic and electrochemical sensing units, and the coaxial three-function composite probe is matched with a synchronous laser heating module and a multi-physical field synchronous control system. During testing, the probe scans on the surface of a sample, local thermal disturbance is applied to each pixel point, and the interface temperature, acoustic impedance and corrosion rate data of the point are synchronously collected. According to the invention, through high integration in structure and accurate synchronization in time, the space mismatch error of multi-source measurement is eradicated, and multi-physical field distribution images which are accurately corresponding to each other can be obtained in situ and losslessly.

The invention belongs to the field of micro-nano manufacturing technology and microelectronic manufacturing, and particularly relates to a method for manufacturing a complex curved surface conformal high-resolution embedded circuit, which comprises the following steps of: firstly, processing a nano groove structure with a specific pattern on a hard curved surface substrate according to a preset path; a metal seed layer is deposited in the groove, then the groove is filled with a conductive material by adopting filling technologies such as precise electroplating / chemical plating, fusion strengthening is generated among various metals by adopting a laser heating mode, and the adhesive force with the hard curved surface substrate groove structure can be further enhanced after the metals are cooled. And the requirements of extremely severe service environments are met. A new solution is provided for low-cost manufacturing of the embedded curved surface circuit which is high in resolution, adjustable in height-width ratio, high in electrical performance, high in adhesive force and capable of combining multiple materials.

The invention discloses a working temperature control method of a Josephson probe and a method for regulating and controlling the thickness of an Nb film, the working temperature of the Nb-based probe is increased to 7.2 K by regulating and controlling the film thickness parameter and controlling the working temperature of the probe, and the highest record of similar probes is created. According to the method for regulating and controlling the thickness of the Nb film, a four-groove quartz tube is selected as a substrate, and after ultrasonic cleaning, a nano needle tip is drawn by adopting a laser heating method, so that a needle tip structure with a clean surface and a controllable geometric structure is obtained; and horizontally fixing the prepared nano needle tip on a probe bracket, depositing a niobium film by adopting a magnetron sputtering process, and controlling the thickness of the Nb film to prepare the Josephson probe. According to the invention, the dependence of the probe on an extremely low temperature environment is obviously reduced, the limitation of the original process is broken, the available film thickness range is effectively widened, the preparation yield and the performance consistency of the probe are obviously improved, and a reliable device basis is provided for the practical development of near-field microwave imaging and quantum sensing technologies.

The invention belongs to the technical field of temperature characterization, and discloses a semiconductor device temperature characterization method and system. The semiconductor device temperature characterization scheme provided by the invention comprises the following steps: bearing a semiconductor device and adjusting the position of the semiconductor device by using a device bearing and adjusting unit; respectively emitting detection laser and heating laser by using a detection laser emitting unit and a pumping laser emitting unit, and irradiating the detection laser and the heating laser to a test area of the semiconductor device; collecting and recording a temperature measurement signal reflected by the semiconductor device by using a temperature measurement unit; the device operation control unit is used for providing an electric signal for the semiconductor device and synchronously triggering the temperature measurement unit to record a temperature measurement signal so as to ensure the synchronization of online work and temperature measurement of the semiconductor device; and obtaining transient temperature characterization information of the semiconductor device based on the temperature measurement signal by using the main control unit. According to the invention, temperature characterization of nanosecond-level time and submicron-level spatial resolution of the semiconductor device can be realized.

The invention discloses an aerosol generating device and a heating control method thereof.The aerosol generating device comprises a heating body, the heating body is a microwave heating body or a laser heating body, and the heating control method comprises the steps that when a heating starting signal for an aerosol generating substrate contained in the aerosol generating device is detected, the heating starting signal is sent to the aerosol generating substrate; and controlling the heating body to heat the aerosol-generating substrate, so that the temperature of the aerosol-generating substrate rises from the current temperature to the preheating temperature and is kept before the suction action occurs. When it is detected that the suction action occurs, the heating body is controlled to heat the aerosol-generating substrate, so that the temperature of the aerosol-generating substrate reaches the corresponding target temperature and is kept before the next suction action occurs. Wherein the target temperature corresponds to the current suction opening number, and the target temperature of the first opening is larger than the preheating temperature and smaller than the target temperature of other opening numbers. The problem that the mouth is scalded when the first mouth of aerosol is smoked can be avoided, and the smoking experience is improved.

The invention relates to the technical field of packaging equipment, in particular to semiconductor laser packaging equipment and a using method thereof.The semiconductor laser packaging equipment comprises a rack, a packaging table and a laser heater and further comprises an electric push rod, an air exhaust assembly and a plugging assembly, the electric push rod is arranged on the rack, and the air exhaust assembly is arranged at the output end of the electric push rod; the plugging assembly is arranged in the air exhaust assembly, the air exhaust assembly comprises an adsorption part, an air hole is formed in the adsorption part and is formed below the plugging assembly, the air exhaust assembly generates negative pressure and adsorbs a chip when being powered on and started, and the electric push rod drives the air exhaust assembly to drive the plugging assembly and the chip to move downwards when being powered on and started. Through the arrangement of the air exhaust assembly and the plugging assembly, the situation that stress is concentrated on the bonding surface of the chip and the welding flux due to local cooling can be avoided, gaps generated when the welding flux is molten can be eliminated through vibration generated by impact, and the quality and reliability of packaged products are effectively improved.

The invention discloses a method for testing the thermophysical property of a rare earth aluminate glass melt. The density, the viscosity and the surface tension of the high-temperature melt of La2O3-Al2O3-ZrO2 series glass are tested by adopting a container-free air suspension technology. The method has the remarkable advantages that a small amount of raw materials can be used and rapid heating and cooling can be realized by the container-free air suspension technology, crucible pollution and devitrification are avoided, and the measurement precision is ensured; the temperature control range of laser heating is from 200 DEG C to 3200 DEG C, and the physical property data of the La2O3-Al2O3-ZrO2 glass in a deep supercooling interval can be accurately measured; the doping amount of ZrO2 has obvious influence on the viscosity and the surface tension of the glass, and important reference is provided for component design and process optimization of the high-performance glass of the system; experimental results show that along with the increase of the ZrO2 content, the glass is easy to crystallize in the cooling process, and the physical property data of a low-temperature interval cannot be measured, but the measurable range can be effectively extended by adopting the method disclosed by the invention, and a reliable testing means is provided for the physical property research of the rare earth aluminate glass and the preparation of high-performance glass.

The invention discloses a thermoplastic composite material double-laser laying and winding head device and a processing method. A torque motor is connected with a composite material tape reel; one end of the tension adjusting mechanism is connected with the composite tape reel, and the other end is connected with the pressure cylinder; the support is connected with the side surface of the tension adjusting mechanism 4; the re-conveying mechanism is fixed to the middle of the tension adjusting mechanism, the first laser head and the second laser head are fixed to the bottom of the tension adjusting mechanism, and the shearing mechanism is located between the re-conveying mechanism and the pressing mechanism. The re-conveying mechanism can be used for re-conveying the composite material strip to a proper position below the pressing mechanism after the composite material strip is cut off; the shearing mechanism is used for shearing the composite material strip when the composite material strip needs to pass through the jump point; the pressing mechanism attaches the composite material strip to the surface of a workpiece in a rolling mode, the shearing mechanism shears the composite material strip, and the composite material strip is laid and wound on the workpiece to form a base material; the pressing mechanism is used for pressing the composite material strip on the base material; the side face of the pressing mechanism is connected with a pressing roller cooling water faucet. According to the invention, the thermoplastic composite material is heated through double laser, so that the reliability of interlayer bonding of the composite material can be improved, the interlayer strength of the thermoplastic composite material is improved, and the laying and winding quality and efficiency of the thermoplastic composite material are improved.

The invention belongs to the technical field of mechanical part machining, and particularly relates to automatic feeding and discharging laser cutting equipment for flange plate production. The automatic feeding and discharging laser cutting equipment comprises a workbench, a slag discharging opening is formed in one side of the upper end of the workbench, a recycling opening is formed in one side of the lower end of the workbench, and the recycling opening is in an inverted right triangle shape and communicates with an inner cavity of the slag discharging opening; a discharging cleaning assembly is arranged in an inner cavity of the slag discharging opening, a feeding cutting assembly is arranged above the slag discharging opening and used for cutting an alloy steel plate machining flange plate, and the problems that due to cutting of existing laser cutting equipment, a large amount of waste residues generated through laser heating gasification can be generated, the waste residues are accumulated in a workbench for a long time, and the waste residues generated through laser heating gasification can be mutually bonded and blocked; if the flange plate is cleaned in time, the penetrability of the laser cutter can be influenced by waste residues, and after the flange plate is cut, the alloy steel plate, the flange plate and waste materials need to be separated and recycled, so that the operation is tedious, and the production efficiency of the flange plate is influenced.

A coiling machine comprises a laser heater which emits laser light to a wire formed into a helical shape, thereby heating a portion of the wire, and a cutting unit which cuts a site of the wire heated by irradiation with the laser light. An output density of the laser light is greater than or equal to 10 W / mm2 and less than or equal to 100 W / mm2.

The invention relates to the technical field of titanium alloy preparation, in particular to a method and equipment for manufacturing a titanium alloy part. A manufacturing method of a titanium alloy part adopts a powder laying and laser heating process to print and manufacture the titanium alloy part, and comprises the following steps: firstly laying a layer of titanium alloy powder on a substrate, melting the laid powder through laser according to a set path, and solidifying the molten powder to form a titanium alloy sample. And the required titanium alloy part is printed and manufactured by circulating the powder spreading and laser heating processes for multiple times. In the manufacturing process, when a specified number of layers are printed, a titanium alloy sample needs to be heated, pressurized and flattened. The surface of the titanium alloy sample is heated, so that some unmelted particles in the titanium alloy sample can be melted, and the surface of the titanium alloy sample is flattened in a pressurizing and flattening manner, so that part of air holes can be filled with the melted particles, and the quality of the manufactured titanium alloy is improved.

The invention discloses a liquid nitrogen cooling and laser heating collaborative auxiliary cutting device and a cutting method thereof. The device comprises a laser heating system, a liquid nitrogen cooling system, a cutting system, a tool temperature monitoring system and a control system. Laser emitted by the laser heating system is focused on a to-be-machined area of a workpiece in front of a cutting edge after transmitting through the cutter body; the liquid nitrogen cooling system accurately sprays liquid nitrogen to the cutting edge area of the tool through a heat insulation liquid supply pipeline and a nozzle which are integrated in the tool rest. The control system dynamically and synergistically adjusts the laser output power and the liquid nitrogen injection flow based on a temperature signal sent by a thermocouple embedded in the cutter. According to the device, parallelism of the two processes of laser heating of a workpiece and liquid nitrogen cooling of a tool is achieved in space, dynamic matching and accurate balance of laser heating and liquid nitrogen cooling are achieved in time, and the problems that in laser-assisted cutting, the tool is prone to thermal damage, the cooling efficiency is low, and a thermal field is out of control are effectively solved.

The invention relates to a device and a method for preparing a gradient heterogeneous structure nickel-based alloy, and belongs to the related technical field of metal material preparation, the device sequentially comprises an uncoiling device, a first guide roller, a pinch roller, a cooling box, a pinch roller, a laser heating device, a roller group, a second guide roller and a coiling device along the direction of a production process; the cooling box sequentially comprises a cleaning section, a deep cooling section and an air cooling section in the production process direction. The laser heating device comprises laser sources which are symmetrically arranged up and down, the nickel-based alloy plate strip with the gradient structure can be efficiently produced through the continuous rolling and cooling process, the requirement for batch application of high-performance materials in the modern industry is met, and through the synergistic effect of copious cooling, laser heating and rolling, the high-performance nickel-based alloy plate strip with the gradient structure can be obtained. The nickel-based alloy forms a continuous hardness / grain size gradient along the thickness direction; and high strength and anti-fatigue performance are both considered.

The invention relates to the field of litchi thawing, and particularly provides a modeling method of a temperature prediction model for efficient litchi thawing, and the modeling method specifically comprises the following steps: step 1, selecting frozen litchis as a sample; step 2, placing all litchis in the same unfreezing environment at the same moment, and recording temperature data of each litchis at different moments; 3, constructing a heat conduction equation based on laser heating, optimizing the heat conduction equation to obtain the heat conductivity of the anisotropic litchi, and performing iterative optimization on the heat conduction equation according to the actually measured temperature data and the temperature data predicted by the heat conduction equation to obtain the heat conductivity; 4, obtaining a temperature prediction model according to the thermal conductivity; and 5, optimizing the temperature prediction model. The model constructed by the invention can more accurately predict the temperature of the inside of the litchi in an unfreezing process.

The invention discloses a surface-enhanced Raman detection method based on laser-induced deposition, and belongs to the technical field of micro-nano particle deposition and detection. According to the method disclosed by the invention, the gold nanoparticles and the to-be-detected particles are driven to be enriched and precisely deposited to a target area by utilizing laser local heating, and Raman detection is synchronously carried out, so that high-sensitivity detection on trace substances is realized. According to the method, the problems of uneven particle deposition, uncontrollable signal enhancement and the like in the traditional surface enhanced Raman scattering substrate preparation are solved, meanwhile, the requirement of an extra laser source in a traditional detection method is avoided, and integration of laser deposition and detection is realized.

The invention relates to a to-be-cut solar cell and a photovoltaic module, and the cell comprises a cell body, and the surface of the cell body is provided with a laser heating enhancement region; the laser heating enhancement area is provided with a light trapping part and a heat absorption part, and a to-be-cut line of the battery piece body is located in the laser heating enhancement area; the light trapping part is arranged on the surface of the laser heating enhancement area; the heat absorption part and the light trapping part are at least partially overlapped, and the heat absorption part is arranged on the to-be-cut line. The light trapping part can improve the light incidence effect and increase the utilization rate of laser energy, the heat absorption part can absorb laser and heat around the light trapping part so as to improve the temperature of laser cutting at the position of the to-be-cut line, and therefore under the condition that low laser output power is adopted, the laser cutting efficiency is improved. The heat on the solar cell is not reduced, the effect of cutting the solar cell can still be realized, the damage to the surface of the solar cell is reduced, the power loss of the solar cell is reduced, and the power generation efficiency and long-term reliability of the photovoltaic module are improved.

The present application relates to the technical field of inorganic sealing materials, and in particular relates to a light-absorbing material, a glass powder, a slurry for laser sealing, and a preparation method therefor and the use thereof. The light-absorbing material provided by the present application has a general formula of FexMnyOz, wherein 1≤x≤10, 1≤y≤5, and 1≤z≤17. The light-absorbing material can generate both dielectric loss and magnetic loss, and therefore, the light-absorbing material can absorb opposing electromagnetic waves and better absorb energy provided by means of laser heating and melting. The light-absorbing material of the present application is an inorganic material with a low melting point and a low thermal expansion coefficient. When the light-absorbing material is used in a slurry for laser sealing, it can endow the slurry for laser sealing with a light-absorbing property and a function of reducing the thermal expansion coefficient, which can improve the dispersity and packing compactness of the slurry for laser sealing and alleviate the problem of internal invisible cracks; in addition, it has a strong bonding force with a substrate or a packaging cover plate, thereby forming good water-proof and oxygen-proof airtight protection for internal functional devices thereof.

The invention relates to the technical field of composite material printing, and discloses a process method and system for optimizing distribution of reinforced fibers in composite material printing, and the process method comprises the steps of mixing and preparation of reinforced fibers and a matrix material, path planning and fiber distribution design, real-time fiber conveying and mixed output, and laser heating and immediate curing. Online detection, feedback optimization, printing post-processing and quality verification are carried out. According to the invention, the uniform distribution of the fibers and the matrix material improves the interlayer bonding strength, and the bonding strength is improved by 30%-50%; by means of optimized fiber direction arrangement, the part has excellent mechanical performance under multi-directional loads, the breaking strength is improved by 40%, and the fatigue life is prolonged by two times; fiber consumption is reduced in a low-stress area, mechanical requirements are met, material cost is saved, and the cost is reduced by about 20%; and a real-time monitoring and closed-loop feedback mechanism ensures the distribution uniformity of each layer of fibers, so that the quality stability of a printing part is improved.

According to the rolling device and method for multi-step incremental forming of the ultra-high-strength plate, through cooperative finishing of laser local heating and a small fillet forming roller, the minimum forming fillet radius of the ultra-high-strength plate can be compressed to be smaller than or equal to 2T (T is the thickness of the plate) from R larger than or equal to 3T in traditional cold rolling; while the design freedom degree and the structural performance of the part are remarkably improved, the cold hardening high-strength state of a non-heating area is precisely kept, and the overall softening defect caused by a hot stamping process is thoroughly avoided; and as the forming force mainly acts on the local softening area, the required forming force is obviously reduced, and meanwhile, the springback of the softening area can be effectively inhibited, so that the size precision and the shape stability of the small fillet are ensured. The device serves as an independent unit and can be conveniently integrated at the tail end of an existing rolling line, subversive transformation of the whole production line is not needed, and high economical efficiency and practical value are achieved.

The embodiment of the invention discloses a laser heating method and a related device, which are used for improving the heat uniformity of an object to be heated. The controller is applied to the heating system, the heating system further comprises a bearing platform and a plurality of laser units, a to-be-heated object is placed on the bearing platform, and the method comprises the following steps: determining and starting a plurality of target laser units from the plurality of laser units, and determining a target partition according to an obtained thermal image containing the to-be-heated object, the target laser units are in one-to-one correspondence with the target partitions; for each target laser unit, acquiring pixel temperature values of a plurality of pixels involved in a target partition corresponding to the target laser unit, and determining a target partition temperature value of the target partition according to the pixel temperature values of the plurality of pixels; and obtaining a corresponding target power difference value according to a difference value between the target partition temperature value and a preset temperature value, and adjusting the power of the target laser unit based on the target power difference value so as to stabilize the target partition temperature value at the preset temperature value.

The invention discloses a laser single crystal optical fiber doped with ions in a gradient manner and a preparation method of the laser single crystal optical fiber, when the single crystal optical fiber is prepared, firstly, raw materials with different doping concentrations are uniformly mixed respectively, then the raw materials are pressed into sheets respectively, the sheets are pressed for the second time to enhance compactness, then the pressed sheets are sintered to obtain a polycrystal material, and the polycrystal material is sintered to obtain the laser single crystal optical fiber doped with ions in a gradient manner. The preparation method comprises the following steps: respectively grinding a polycrystalline material until the polycrystalline material passes through a 400-mesh sieve, filling polycrystalline material powder into a strip balloon in a gradient segmentation manner, compacting and sealing, pressing and sintering to obtain a ceramic material rod, cutting the ceramic material rod into a ceramic square rod, and performing seeding growth by adopting a laser heating base method and taking the ceramic square rod as a source material rod to obtain the gradient ion-doped laser single crystal optical fiber. Compared with the prior art that the laser single crystal fiber doped with the ions in the gradient mode is prepared through a welding process, the method is low in process difficulty, welding interface diameter fluctuation does not need to be accurately controlled, the yield is high, the procedure is simple, and the production efficiency is high.

The invention discloses a particle erosion test device and method, and belongs to the technical field of particle erosion tests.The particle erosion test device comprises a clamping piece used for clamping a workpiece, a sand blasting device and a laser emitter, and the laser emitter is used for emitting laser to irradiate the workpiece so as to heat the workpiece; the particle erosion test device further comprises cooling water pipes and a vacuum pipe, the vacuum pipe is arranged outside the laser transmitter in a sleeving mode, the two opposite ends of the vacuum pipe are connected with the cooling water pipes, and the cooling water pipes are communicated with the cooling water tank. The cooling water pipe is used for introducing circulating cooling water into the vacuum pipe so as to adjust the temperature of the laser transmitter, and the air compressor sprays compressed air to the workpiece through the compressed air spraying pipe so as to cool the workpiece. Through combined use of the laser heating device and the particle erosion device, a particle erosion test in an extreme environment is stably simulated, and the effectiveness of the test is ensured.