233 results about "Boron" patented technology

The invention discloses a neodymium-iron-boron magnet with double main phases and light rare earth diffusion based on asymmetric cerium distribution and a preparation method, and relates to the technical field of neodymium-iron-boron magnets. The method comprises the steps that a diffusion matrix is prepared through a double-main-phase technology, in the double-main-phase technology, the components of a main-phase alloy and an auxiliary-phase alloy are RaCebFe100-a-b-c-dMcBd, R is PrNd alloy or Nd metal, M is at least one of Cu, Al, Zr, Co and Ga, the content of Ce in the main-phase alloy is larger than that of Ce in the auxiliary-phase alloy, then the upper surface and the lower surface of the diffusion matrix are coated with a diffusion source solution, and the diffusion matrix is obtained through heat treatment. Carrying out heat treatment and aging treatment to obtain a neodymium-iron-boron magnet; the diffusion source solution is formed by mixing a diffusion source and a solvent, and the diffusion source is (PrmNdn) aAlbCucZrdCoeMgf. The neodymium-iron-boron magnet obtained through the method has high residual magnetism and high coercive force at the same time, the diffusion efficiency of the diffusion source is high, and the rare earth utilization rate is increased.

A high-abundance rare earth iron boron regenerated magnet and its preparation method belong to the field of rare earth permanent magnet materials and their recycling technology. After surface treatment, high-abundance Ce / La rare earth iron boron unqualified products and processing waste are subjected to coarse crushing and hydrogen explosion powdering; a Ce, La, Nd, and Pr rare earth alloy is prepared using a rapid solidification belt spinning technology and hydrogen explosion; the above two materials are ball milled, mixed, oriented, and pressed according to a certain proportion, and then sintered and heat treated to obtain a regenerated sintered magnet. The regenerated magnet prepared by the present invention has a waste material utilization rate of up to 95%, a low rare earth addition amount (0 to 5wt.%), and a light rare earth addition ratio (LaCe / NdPr) greater than 50%. The coercive force of the regenerated magnet is significantly improved, and the comprehensive magnetic properties are equivalent to or even higher than those of the original magnet. The present invention can accurately control the cheap light rare earths La and Ce to obtain a high-performance regenerated magnet, thereby realizing the high-value recycling of high-abundance rare earth permanent magnets.

The invention provides a neodymium iron boron magnet and a preparation method thereof, and belongs to the technical field of magnetic materials. The neodymium-iron-boron magnet comprises rare earth elements R, transition metal elements T, metal elements M and B elements, the R comprises Pr and Nd, the mass percent of the R is 29-32 wt%, the R comprises heavy rare earth elements Tb and Dy with the mass percent being 0-0.1 wt%, the M at least comprises Ti and Zr, and the sum of the mass percent of Ti and the mass percent of Zr is 0.1-0.6 wt%; t comprises Fe, or Fe and Co; the mass percent of the B is 0.84 wt%-0.94 wt%; the neodymium-iron-boron magnet is provided with a main phase and a grain boundary phase comprising a rare earth-rich phase, the proportion of the rare earth-rich phase to the grain boundary phase is 0.15-0.35, and the atom proportion of Pr in R in the rare earth-rich phase is 0.4-0.5. The neodymium-iron-boron magnet disclosed by the invention has excellent magnetic performance under the condition of no heavy rare earth or low heavy rare earth elements.

The invention relates to the technical field of data processing, in particular to a boron-11 electronic gas analysis method for trace impurity recognition, which comprises the following steps: acquiring a historical time sequence data sequence of the concentration of each gas phase element in a container for storing boron-11 electronic gas at the current monitoring moment; periodically dividing each historical time sequence data sequence to obtain suspected abnormal data in each data segment; according to suspected abnormal data in the recent time sequence data sequence of each gas phase element concentration, the recent monitoring data distribution change abnormal degree and the multi-type correlation change abnormal degree of each gas phase element concentration are obtained, and a self-adaptive concentration threshold value at the current monitoring moment is correspondingly obtained; according to the self-adaptive concentration threshold value corresponding to the concentration of each gas phase element, trace impurity abnormity monitoring is carried out on the boron-11 electron gas at the current monitoring moment, and the accuracy of trace impurity abnormity monitoring is improved by dynamically adjusting the fixed threshold value.

The invention discloses a compact high-energy gamma generator for special nuclear material checking and a checking method.The gamma generator comprises a shell and an ion source, the shell is internally provided with a high-pressure vacuum cavity, the ion source is arranged at the left end of the high-pressure vacuum cavity, the right end of the high-pressure vacuum cavity is provided with a high-pressure connector system, and the left end of the high-pressure connector system is connected with a leading-out accelerating electrode; a target holder is arranged in the extraction accelerating electrode, and a boron target sheet is mounted on the target holder; negative high voltage is fed into the extraction accelerating electrode through the high-voltage connector system, an electric field is formed between the extraction accelerating electrode and the anode of the ion source, the proton beam is extracted and accelerated by the electric field and then bombarded on the boron target sheet, 11B (p, gamma) 12C resonance radiation capture reaction is carried out, and high-energy gamma rays are released; the gamma ray and the special nuclear material are subjected to a photofission reaction to emit instant neutrons and delayed neutrons, and the detection of the special nuclear material is realized by measuring the instant neutrons and the delayed neutrons. The device is compact in structure, high in detection sensitivity, short in detection time, low in interference and long in service life, and has very high application value.

The invention provides an under-water discharge machining system and method for a radiation environment. The under-water discharge machining system comprises a pulse power supply control system, an electric spark machining head device and a servo control system. The pulse power supply control system comprises a power supply control box, a rectifier and a power amplifier which are electrically connected in sequence. And the power amplifier is electrically connected with the servo control system and the electric spark machining head device. The electric spark machining head device is provided with a feedback signal wiring connected to the servo control system. The pulse power supply control system is matched with the servo control system to drive the electric discharge machining head device to guarantee the process of the workpiece to be machined, so that the problem that conventional electric discharge machining equipment cannot be used in the high-radiation and boron-containing water environment is solved.

The invention relates to a method for detecting boron distribution in an oxidation corrosion product deposition layer. The total mass of boron in the oxidation corrosion product deposition layer is detected by utilizing an instantaneous gamma activation technology; the method comprises the following steps: obtaining a geometric boundary of a deposition layer of a corrosion product according to neutron photography, constructing a Compton cone in the geometric boundary obtained by neutron photography according to instant gamma rays generated by the oxidation corrosion product and Compton scattering information generated by the action of a Compton photography unit, and reconstructing the origin of the gamma rays; and carrying out pixelated image reconstruction by adopting a random origin set algorithm to obtain a distribution image generated by gamma rays so as to obtain the proportional distribution of the boron element in the oxidation corrosion product deposition layer. According to the obtained total boron element concentration and boron element proportion distribution, boron element concentration distribution in the oxidation corrosion product deposition layer is calculated, and the defects that only boron element distribution in the limited depth of the surface of the corrosion product deposition layer can be measured and internal element distribution information cannot be obtained in an existing method are overcome.

The invention provides a grain boundary diffusion neodymium iron boron magnet and a preparation method thereof, and relates to the technical field of magnetic materials. The preparation method comprises the steps of surface pretreatment and purification, precise diffusion source construction through magnetron sputtering and diffusion promotion through vacuum heat treatment. The core function of pretreatment is to remove surface impurities and lay a foundation for subsequent deposition of alloy films; the proportion of Tb, Al and Cu in a diffusion source is accurately regulated and controlled in the magnetron sputtering stage, and the synergistic effect is achieved; and the vacuum heat treatment promotes Tb to diffuse into the neodymium iron boron. According to the method, a technical closed loop with pretreatment as a basis, a diffusion source as a core and heat treatment as power is formed, the microstructure of the neodymium-iron-boron magnet is optimized, a complete and continuous shell structure with the moderate thickness is formed, the diffusion depth of heavy rare earth is greatly increased, and the service life of the neodymium-iron-boron magnet is prolonged. Finally, the coercive force of the neodymium-iron-boron magnet is remarkably improved, and the utilization rate of heavy rare earth elements is effectively improved. The problem of low Tb utilization rate in the prior art is solved, and the bottleneck of coercive force improvement is broken through.

The present invention provides a low-boron R-Fe-B permanent magnet material and a preparation method thereof, and belongs to the technical field of rare earth permanent magnet materials. The present invention crushes and dehydrogenates R-Fe-B-M alloy and grain boundary phase R-Ga-M alloy in sequence respectively, obtains coarse material and mixes with antioxidant, lubricant and dispersant, and then carries out press forming, cold isostatic pressing, vacuum degassing, vacuum low-temperature sintering and aging treatment. In the present invention, the content of R in the R-Fe-B-M alloy is 29wt%~36wt%, and the content of B element is 0.8wt%~0.96wt%, which belongs to an alloy with excessive rare earth elements and low B element content, which is conducive to producing more rare earth-rich grain boundary phases, and the R-Ga-M alloy has a low melting point, which is conducive to liquid phase sintering. In combination with vacuum degassing first, a pressure-assisted diffusion air pressure three-stage heating delay sintering process is used to obtain a low-boron R-Fe-B permanent magnet material.

The invention provides a method for determining boron element in iron ore, which comprises the following steps: weighing 0.2 g of sample, uniformly mixing with a flux, heating to red at 700-800 DEG C, cooling, adding sodium peroxide for secondary melting, dissolving in water, and transferring to a beaker; adding ethanol to boil, fixing the volume to 500mL, filtering and taking 100mL, adjusting the pH value, adding hydrogen peroxide to slightly boil, cooling, adding barium carbonate to boil, diluting and filtering, and taking 25mL for color development determination. According to the method, sodium carbonate and / or potassium carbonate and sodium peroxide are adopted to form a composite flux, an iron ore sample is completely decomposed through secondary melting and step-by-step dissolution, and the sample decomposition efficiency is improved; the method is stable in recovery rate, is superior to a conventional method in precision, can accurately measure the boron content in the iron ore, meets the technical requirements on boron element detection in the fields of ferrous metallurgy, geological exploration and the like, provides an efficient and reliable detection means for boron content analysis, and ensures the accuracy and reproducibility of a detection result.

The invention discloses a preparation method of a sintered neodymium-iron-boron magnet without heavy rare earth, Pr-Fe-B-M alloy is used as an auxiliary phase alloy, LRe-Fe-B-M alloy is used as a main phase alloy, the auxiliary phase alloy is used for preparing a magnet matrix and performing grain boundary diffusion at the same time, the magnet without heavy rare earth is prepared, praseodymium element is non-uniformly distributed in the magnet, and rare earth element is not uniformly distributed in the magnet. The Pr content of part of the main phase is higher than the overall average content, the crystal boundary praseodymium content is higher than the overall average content, and the magnet surface praseodymium content is higher than the overall average content. The coercive force and the temperature stability of the magnet are improved, the magnet can still keep excellent magnetic performance under the condition that Dy and Tb are not contained, heavy rare earth elements such as Dy and Tb which are scarce in resource and high in price are prevented from being used, the high performance of the magnet is guaranteed, the production cost is reduced, and the resource utilization efficiency is improved.

The invention belongs to the technical field of special maintenance in a high-radiation environment of a nuclear power plant, and particularly relates to a digital control system and method for high-radiation boron-containing underwater electrical discharge machining. Comprising a control module, the control module is respectively connected with a human-computer interaction interface, an input / output module, an analog-to-digital conversion module and field layer equipment, the input / output module is connected with a limit switch, and an external alarm and a control instruction are input into the input / output module. And the temperature signal, the gap voltage current and the conductivity are converted by the analog-to-digital conversion module and then are input to the control module. The method has the beneficial effects that in the electric spark discharge machining operation process under the high-radiation boron-containing water environment of a nuclear power plant and the like, centralized and effective control over all field layer equipment is achieved, and the problem that conventional discharge machining equipment cannot be used under the high-radiation boron-containing water environment is solved.

The invention relates to the technical field of preparation of neodymium-iron-boron materials, and discloses a high-performance neodymium-iron-boron material and a preparation method thereof, and the high-performance neodymium-iron-boron material realizes efficient permeation of heavy rare earth elements along a specific path through a grain boundary network pre-construction and gradient diffusion technology in combination with a hydrogen decrepitation and surface activation process, so that the coercive force and thermal stability of a magnet are remarkably improved. An alternating magnetic field assisted sintering and dynamic tempering process is innovatively adopted, and a magnetic field-lattice coupling effect is utilized to release microscopic stress, so that magnetic performance attenuation in a high-temperature environment is effectively inhibited. A surface protection system is fused with a grain boundary modification and composite coating technology, a multistage corrosion-resistant barrier is constructed through the synergistic effect of an intermetallic compound layer and a nano coating, and the service life of the magnet in a severe environment is greatly prolonged. According to the method, the bottleneck of mutual restriction of performance indexes in a traditional process is broken through, and collaborative optimization of coercive force strengthening, temperature stability improving and corrosion resistance is achieved on the basis of keeping the high residual magnetism characteristic.

The invention belongs to the field of rare earth permanent magnetic material diffusion processes, and particularly relates to a diffusion process and application of a grain boundary diffusion composite diffuser using abundance rare earth. Aiming at the problem of unbalanced utilization of rare earth caused by the existing grain boundary diffusion technology, the invention provides the diffusion process of the grain boundary diffusion composite diffusor using the high-abundance rare earth, the grain boundary diffusion composite diffusor using the high-abundance rare earth is used, and the surface of a neodymium-iron-boron magnet is coated with the diffusor and then is subjected to heat treatment. According to the method, the synergistic effect mechanism of the light rare earth and the heavy rare earth in the diffusor is analyzed and concluded through the system, the light rare earth promotes the utilization of the heavy rare earth, and the diffusion depth and the coercive force improvement effect of the high-abundance light rare earth diffusor are remarkably improved.

The invention provides a boron-containing organic compound and an organic electroluminescent device thereof, and relates to the technical field of organic electroluminescent materials. According to the boron-containing organic compound, a spiro structure is added on a classic boron-nitrogen parent nucleus, large steric hindrance is brought to molecules, on one hand, vibration of the molecules is reduced, so that a spectrum is narrowed, and the color purity of light is improved; on the other hand, the distance between molecules is increased, the acting force between the molecules is weakened, quenching caused by aggregation is overcome, the luminous efficiency of the organic light-emitting device is improved, and the service life of the organic light-emitting device is prolonged. The method can be applied to the fields of information display, illumination, organic solar cells and the like.

The invention discloses a neodymium-iron-boron rare earth permanent magnet, a preparation method and use thereof. The neodymium-iron-boron rare earth permanent magnet comprises: R: 28.5-33 wt %, wherein RL comprises Pr, Pr≥14 wt %, and RH comprises one or more of Dy, Tb, Gd and Ho; Co: 12-20 wt %; Al: 0.5-1.5 wt %; X: 0.3-1.5 wt %; B: 0.88-1.05 wt %; and a balance of Fe, the microstructure thereof comprises a main phase M, a grain boundary phase A and a grain boundary phase B; the main phase M is R2(Fe, Co)14B having a volume percentage of 90-94%; the grain boundary phase A is R(Fe, Co)2 having a volume percentage of 5-8%; and the grain boundary phase B is R4(Fe, Co)3 having a volume percentage of 1-2%. The neodymium-iron-boron rare earth permanent magnet has a high Co content, a high Curie temperature, a low temperature coefficient, good mechanical properties, a high magnetic energy product and a high coercive force.

The application discloses a magnetic detector for detecting neodymium-iron-boron magnetic materials and relates to the technical field of magnetic detection. The magnetic detector for detecting neodymium-iron-boron magnetic materials is characterized in that the uniform mechanism, the control component, the anti-interference mechanism and the disturbance component are cooperatively used to solve the problems that, when the magnetic materials are subjected to overheating and supercooling detection, the temperature cannot be quickly and uniformly distributed around the magnetic materials, thus causing detection errors, and the powder volatilized from the magnetic materials at different temperatures can interfere with the magnetic detection results.

A boron dose measurement system, method and apparatus. The system is provided with a first detection apparatus (10), a second detection apparatus (20) and a boron dose measurement apparatus (30), wherein the first detection apparatus (10) detects gamma rays in a target region, in order to obtain first boron measurement information, the first boron measurement information comprising energy spectrum information of the gamma rays; the second detection apparatus (20) detects the gamma rays in the target region, in order to obtain second boron measurement information, the second boron measurement information comprising position information of the gamma rays; the second detection apparatus (20) and the first detection apparatus (10) synchronously perform measurement; and the boron dose measurement apparatus (30) can determine a boron dose distribution in the target region on the basis of the energy spectrum information and the position information of the gamma rays that are obtained by means of synchronous measurement. A boron dose distribution in a target region can be accurately obtained, and the obtained boron dose distribution can meet the requirements for online boron dose monitoring.

The invention discloses a sintered neodymium-cerium-iron-boron magnet with high comprehensive magnetic performance, which is prepared by uniformly mixing and pressing alloy powder with a chemical formula of (Nd1-xCex) aM100-a-b-cFebBc and one or more kinds of X-B alloy powder and carrying out sintering and tempering treatment, a is more than or equal to 28 and less than or equal to 33, b is more than or equal to 58 and less than or equal to 69, c is more than or equal to 0.8 and less than or equal to 1.1, x is more than 0 and less than or equal to 20, and b is more than or equal to 1 and less than or equal to 3. M is one or more of Zn, Ga, Co, Cu, Nb, Si, Mn and Al, and X is one or more of Ti, Hf, Zr, Cr and Mo. The preparation method comprises the steps of raw material proportioning, rapid hardening melt-spinning, hydrogen crushing, airflow grinding powder preparation, mixed powder compression, sintering and tempering heat treatment. The X-B compound is introduced, a multi-stage induction system is constructed in the magnet, directional migration and enrichment of Ce elements in a grain boundary area are effectively regulated and controlled, an excellent magnetic microstructure with a Ce-rich grain boundary phase and a main phase mainly comprising Nd2Fe14B is formed, a grain boundary engineering strategy without additional heavy rare earth element compensation is provided, and the preparation method has the advantages of being simple in process, low in cost and easy to popularize. And efficient utilization of high-abundance rare earth resources and comprehensive improvement of performance are achieved, and good technical advancement and industrial application prospects are achieved.

The invention relates to a vessel for the long-term storage of DNA in space at a constant temperature of -196 °C. The aim is to protect biological samples – especially DNA – for decades to centuries from the extreme environmental conditions of space, including vacuum, intense radiation, extreme temperature fluctuations and mechanical stresses. The vessel has a three-layered structure: 1. Inner chamber made of boron nitrogen nanotubes (BNNTs) that offer outstanding protection against cosmic radiation, high mechanical strength, chemical inertness and temperature resistance. 2. Middle insulating layer made of aerogel that minimizes heat exchange and keeps the cryogenic temperature constant. 3. Outer protective layer made of titanium, which protects against micrometeorites, It protects against physical impacts and corrosion. Technical advantages: • Long-term stability of DNA through consistently low temperatures. • Effective radiation protection against cosmic and solar radiation. • Excellent thermal insulation thanks to aerogel. • Mechanical robustness due to titanium. Areas of application: • Securing and archiving genetic material for research, space travel and long-term preservation. • Provision of DNA for future scientific or biological restoration projects. Special feature: The capsule is compact, space-compatible, and can be used as part of space missions, space stations, or interplanetary projects.

The invention provides a preparation method of goethite-boron complex minerals for soil improvement, and belongs to the technical field of preparation of artificial minerals for soil improvement, the preparation method comprises the following steps: 1, mixing solutions; 2, stirring the mixed solution; 3, dropwise adding a sodium hydroxide solution; step 4, centrifugal washing; 5, drying the precipitate; and 6, grinding and screening. According to the goethite-boron composite artificial mineral prepared through the method, the boron loss rate is reduced, the boron slow release performance is improved, the ecological environment effect is improved, the boron fertilizer utilization efficiency is improved, iron nutrition is synchronously provided, and the iron deficiency symptom of calcareous soil is relieved.

The invention belongs to the technical field of rare earth permanent magnet material preparation, and relates to a heavy-rare-earth-free high-performance sintered neodymium-iron-boron magnet and a preparation method thereof. By regulating and controlling the total amount of rare earth and the content and proportion of key elements such as B, zirconium, copper and gallium and matching with a specific three-stage aging process, formation and uniform distribution of an R6 (FeCo) 13M phase are effectively promoted, and high coercive force and excellent demagnetization stability are stably obtained under the condition that heavy rare earth is not contained completely.

The invention belongs to the technical field of special maintenance in a high-radiation environment of a nuclear power plant, and particularly relates to a digital power supply system and method for high-radiation boron-containing underwater electrical discharge machining. The AC external power supply is connected with an external power supply; the AC external power supply is connected with a rectification module; a synchronous trigger signal is input into the rectification module; the rectification module is connected with a filtering module; the protection module and the monitoring module respectively output signals to the rectification module, the storage module and the filtering module. The device has the beneficial effects that controllable and stable discharge machining operation power supply output is provided in the electric spark discharge machining operation process in a high-radiation boron-containing water environment such as a nuclear power plant, and the problem that a conventional discharge machining power supply cannot be used in the high-radiation boron-containing water environment is solved.

This invention discloses a high-boron Y–Ce–Co co-substituted nanocrystalline material and its preparation method. The general chemical formula of the nanocrystalline material, expressed as a percentage by mass, is: [RE x (Y y Ce 1‑y ) 1‑x ] z Fe 100‑z‑u‑v‑w Co u M v B w The composition is defined as follows: 0 ≤ x ≤ 0.9, 0.05 ≤ y ≤ 0.9, 25 ≤ z ≤ 35, 5 ≤ u ≤ 50, 0 ≤ v ≤ 3, 1.7 ≤ w ≤ 3. This invention utilizes Y–Ce–Co co-substitution to synergistically regulate the lattice occupancy, elemental valence states, and magnetic exchange interactions of the main phase, significantly improving the temperature stability of the Ce-rich system. Addressing the issues of abnormal grain growth and excessive Laves phase precipitation caused by Co introduction, increasing the mass percentage of B significantly enhances the alloy's amorphous forming ability, refines the main phase grains, and suppresses the formation of harmful second phases. Based on this compositional design, a low-linear-velocity melt rapid quenching process (12 to 18 m / s) can directly prepare materials with uniform nanocrystalline structures without subsequent crystallization annealing, achieving high coercivity and high temperature resistance while significantly reducing raw material costs.

The application discloses a neodymium-iron-boron magnet material and a preparation method thereof, and an electronic device containing the same. The neodymium-iron-boron magnet material comprises the following components: R: 28.0-32.0 wt%, R comprises Nd, R further comprises Tb and / or Dy, the content of Nd is greater than or equal to 27.0 wt%; Cu: 0.16-0.40 wt%; Ga: 0.07-0.24 wt%; Al: less than or equal to 0.10 wt%; B: 0.96-1.10 wt%; Co: 0.15-2.0 wt%; M: 0.10-0.25 wt%, M is selected from at least one of Ti, Zr and Nb; and a phase with a chemical composition of R w Fe 100‑w‑x‑y‑z Co x Cu y Ga z is contained in the two-particle grain boundary of the neodymium-iron-boron magnet material. The neodymium-iron-boron magnet material in the application can realize a significant improvement in coercive force under the condition of adding a small amount of heavy rare earth element Tb, while maintaining a high remanence and squareness.

The invention belongs to the technical field of neodymium-iron-boron magnets, and relates to a neodymium-iron-boron magnet preparation method based on matching of powder particle size and main phase grain size, which comprises the following steps: (1) preparing a neodymium-iron-boron alloy rapid hardening sheet by adopting a rapid hardening process; the main phase is a columnar crystal, and the average size of the short axis of the main phase is 2.1-3.4 microns; (2) sequentially carrying out hydrogen decrepitation and jet milling on the neodymium-iron-boron alloy rapid hardening sheet to obtain neodymium-iron-boron powder; the difference value between the D50 particle size of the neodymium iron boron powder and the average size of the short axis of the main phase is less than or equal to 1 mu m; and (3) carrying out orientation molding, compression molding, sintering treatment and tempering treatment on the neodymium-iron-boron powder to obtain the high-performance sintered neodymium-iron-boron magnet. According to the method, the average size of the main phase short axis in the rapid hardening sheet is effectively matched with the D50 particle size value of the neodymium iron boron powder by accurately controlling the rapid hardening and powder manufacturing process, it is ensured that a complete and uniform rare earth-rich phase coating layer is formed on the surface of the neodymium iron boron particle, and the microstructure is optimized from the source.

This application discloses a method for offline analysis of powder ionization conditions, comprising the following steps: placing a silicon wafer on a target plate of a plasma device; generating a plasma beam under preset powder ionization conditions using the plasma device; injecting powder into the plasma device so that the plasma beam bombards the powder until powder injection is complete; detecting whether a first condition and a second condition are met, wherein the first condition includes at least 70% of the powder injected into the plasma device ablation and brightening upon bombardment by the plasma beam and / or forming a coating on the silicon wafer; the second condition includes the coating containing chemical bonds formed by elements of the powder and / or detecting spectral lines generated by ionization of the powder upon bombardment by the plasma beam. If the first and second conditions are met, the powder is determined to be effectively ionized. Otherwise, the powder is determined to be ineffectively ionized. The method of this application can obtain basic research data on the boronization of boron powder.