245 results about "Gadolinium" patented technology

The invention provides a samarium / europium / gadolinium-containing zirconium hydride block as well as a preparation method and application thereof, and relates to the technical field of radiation shielding materials. The zirconium hydride block containing samarium / europium / gadolinium comprises the following elements in percentage by mass: 95% < = Zr < = 99.5%, 0% < = Gd < = 5%, 0% < = Sm < = 5%, 0% < = Eu < = 5% and 0% lt. Gd + Sm + Eu < = 5%. The preparation method comprises the following steps: respectively hydrogenating sponge zirconium, metal gadolinium, metal europium and metal samarium to respectively obtain corresponding hydride powder; weighing zirconium hydride powder, gadolinium hydride powder, europium hydride powder and samarium hydride powder according to a required proportion, and uniformly mixing under a protective atmosphere; and carrying out pressure sintering on the mixed powder, and carrying out secondary hydrogenation to obtain the zirconium hydride block containing samarium / europium / gadolinium. According to the invention, the absorption of the material to low-energy-segment neutrons can be obviously improved; and the preparation of the zirconium hydride block containing samarium / europium / gadolinium and the accurate regulation and control of doped elements are realized.

The method comprises the following steps: weighing an oxide precursor of metal indium, an oxide precursor of metal M, an ammonium salt and a lithium salt according to a chemical formula of indium-based halide, fully mixing, and calcining in an inert atmosphere to obtain the indium-based halide solid electrolyte. Forming an indium-based halide solid electrolyte through a solid-phase reaction; wherein M is selected from at least one of magnesium, calcium, strontium, barium, aluminum, gallium, indium, bismuth, scandium, yttrium, zinc, germanium, tin, lanthanum, cerium, samarium, gadolinium, holmium, erbium and ytterbium. The method can greatly simplify the synthesis process, reduce the raw material cost and realize industrial batch preparation.

The invention discloses a method for improving performance of rare earth permanent magnet sintered neodymium iron boron grain boundary diffusion, and belongs to the technical field of rare earth permanent magnet materials. The method comprises the steps that a low-melting-point metal layer and a diffusion layer containing heavy rare earth elements are sequentially formed on the surface of a clean sintered neodymium-iron-boron magnet, and then vacuum diffusion heat treatment and tempering treatment are conducted. Wherein the low-melting-point metal layer comprises at least one of copper, aluminum, gallium and tin or an alloy of the copper, the aluminum, the gallium and the tin; the heavy rare earth element comprises at least one of dysprosium, terbium, holmium and gadolinium. The low-melting-point metal layer is preferentially diffused and wets the grain boundary in the heat treatment process, heavy rare earth elements are promoted to be deeply and uniformly diffused towards the interior of the magnet along the grain boundary, so that a heavy rare earth-rich shell layer is formed outside main phase grains of the magnet, and the intrinsic coercive force is improved; meanwhile, the low-melting-point metal forms a strengthening phase at the grain boundary, the brittleness of the magnet after diffusion is improved, the surface corrosion phenomenon is restrained, and collaborative optimization of the comprehensive performance of the magnet is achieved.

The invention provides a rare earth silicon germanate scintillating material and a preparation method and application thereof, in particular to a rare earth silicon germanate scintillating material with high thermal stability and strong radiation resistance and a preparation method and application thereof, the general formula of the rare earth silicon germanate scintillating material with high thermal stability and strong radiation resistance is RE2 (1-x-delta / 2) Ce2xGedeltaSi (1-y + delta) Gey-deltaOz, in the formula, 0 lt; x is more than or equal to 0.05, y is more than or equal to 0.15 and less than or equal to 0.5, delta is more than or equal to 0 and less than or equal to 10 <-4 >, z is more than or equal to 4.95 and less than or equal to 5.05, RE represents a rare earth element, and the rare earth element is selected from at least one of lanthanum (La), lutetium (Lu), yttrium (Y) and gadolinium (Gd). The rare earth silicon germanate scintillating material provided by the invention has the characteristics of strong radiation damage resistance, high scintillation light output, low afterglow and the like while greatly improving the thermal stability, and can be used in occasions with extremely high requirements on the thermal stability or radiation resistance of the material, such as high-energy physical experiments, nuclear medicine imaging, oil exploration wells and the like.

The invention discloses a gadolinium-containing metal-based structure and function integrated neutron shielding material which comprises a stainless steel base material and gadolinium, chromium, tungsten and tantalum which are added into the stainless steel base material, and the stainless steel base material is martensitic stainless steel. The invention also discloses a preparation method of the shielding material. The preparation method comprises the following steps: (1) preparing and mixing the raw materials according to the design proportion; (2) smelting the mixed raw materials into a cast ingot under the protection of vacuum or inert gas; and (3) the cast ingot is made into the martensitic stainless steel material through hot pressing machining. Through the mode, the gadolinium-containing metal-based structure and function integrated neutron shielding material prepared by the preparation method disclosed by the invention has excellent mechanical properties, can be used as a structural component material, is suitable for radiation shielding protection of a microminiature reactor, and can be used as a structural component material to realize integration of a structure and a neutron shielding function.

The invention provides a doped yttrium hydride neutron moderation material and a preparation method and application thereof, and belongs to the technical field of radiation shielding materials. At least one of samarium, europium and gadolinium is doped in yttrium hydride in the form of hydride, and the mass ratio of metal yttrium to metal gadolinium to metal europium to metal samarium is controlled, so that the neutron moderation effect of the neutron moderation material can be improved. According to the invention, at least one of gadolinium hydride, europium hydride and samarium hydride is mixed with yttrium hydride under the protective atmosphere, so that the mass content of each element in the doped yttrium hydride neutron moderation material can be accurately controlled. According to the invention, the mixture is sintered and molded, and the sintering parameters of sintering and molding are controlled, so that the components of the mixture are sintered in a compact state, cracks generated by thermal expansion and cold contraction can be reduced, and the doped yttrium hydride keeps high density and has fewer cracks and defects.

The gadolinium-based cationic polymer contrast agent is synthesized by chelating a cationic polymer and gadolinium ions, has high biological safety and can be used for cartilage imaging. The prepared contrast agent adopts an articular cavity direct injection method, so that the imaging effect is improved, and the contrast dosage is reduced. When the cartilage activity is normal, the content of glycosaminoglycan in the matrix is rich, and when the cartilage is inactivated or the activity is reduced, the content of glycosaminoglycan in the matrix is obviously reduced. The gadolinium-based cationic polymer contrast agent is combined with negatively charged glycosaminoglycan in a cartilage matrix through the charge effect. The gadolinium-based cationic polymer contrast agent can be used for noninvasive and quantitative evaluation of cartilage activity in nuclear magnetic resonance imaging, especially cartilage activity and stability in transplantation.

Provided is a rare earth magnesium alloy based on high-temperature and high-pressure hydrogenation and a preparation method thereof, which belongs to the technical field of alloy materials. In the present disclosure, a microstructure of a rare earth magnesium alloy is regulated based on high-temperature and high-pressure hydrogenation to significantly improve the plasticity of the rare earth magnesium alloy. A similar microstructure can also be achieved in other high-gadolinium (Gd) and high-yttrium (Y) systems. The present disclosure provides a unique approach to enhance the plasticity of a magnesium alloy, and makes it more likely to regulate the mechanical properties of such a rare earth alloy subsequently through other deformation processes. The rare earth magnesium alloy based on high-temperature and high-pressure hydrogenation can be used for neutron-shielding, and is a material with a structure-function integrated design that can be used in the nuclear energy field and space field.

The invention discloses a double-ceramic-layer thermal barrier coating of a differentiated columnar crystal structure and a preparation method, and belongs to the technical field of thermal barrier coating corrosion and protection. The invention innovatively discovers and utilizes the double influence of the columnar crystal size on the performance of the coating; the YSZ layer adopts a fine grain structure of 1-1.5 microns, so that the bonding strength and thermal shock resistance of the coating can be obviously improved; and the modified gadolinium zirconate layer adopts a 2-3 [mu] m coarse grain structure, so that the heat conductivity can be reduced, the permeation path of CMAS along a grain boundary can be effectively inhibited, and meanwhile, the modified gadolinium zirconate layer reacts with CMAS to form a compact barrier layer to prevent further permeation of CMAS. Through accurate regulation and control of electron beam physical vapor deposition (EB-PVD) process parameters, differential control of the sizes of the two layers of ceramic columnar crystals is realized, and under the synergistic effect of the two columnar crystal structures with different sizes, the thermal cycle life and CMAS corrosion resistance of the whole coating system in an ultra-high-temperature environment are remarkably prolonged and improved.

The invention discloses an anti-radiation medical protective glove and a production process thereof, and belongs to the technical field of medical protective gloves, a polydopamine hollow microsphere is prepared by using ZIF-8 as a self-sacrifice template, bismuth and gadolinium elements are loaded through hydrothermal synthesis and ion adsorption, a composite shielding microsphere is prepared, and the composite shielding microsphere is used for preparing the anti-radiation medical protective glove. Then, the composite shielding microspheres and a nano starch enhanced cross-linked network are synergistically introduced into a natural latex matrix, after dipping forming, a hydrophilic / hydrophobic wetting gradient is constructed on a glove lining through mask auxiliary plasma etching, and the anti-radiation medical protective glove is prepared. Through the cooperation of the shielding function of the composite microspheres, the mechanical enhancement of a nano starch cross-linked network and the surface one-way moisture conduction function, the glove has excellent radiation protection performance and also has the characteristics of being light, flexible and comfortable to wear, the problems that a traditional lead rubber glove is heavy, rigid and poor in air permeability are effectively solved, and the service life of the glove is prolonged. The system is especially suitable for medical scenes requiring high flexibility and comfort, such as interventional radiosurgery.

The invention discloses a neodymium, gadolinium and erbium doped composite ceramic solidified body and a preparation method thereof, and belongs to the field of non-metallic materials. The ceramic solidified body is of a two-phase structure, and the two phases are pyrochlore and monazite; the composite ceramic solidified body comprises GdPO4, Er2Ti2O7 and NdErTi2O7, and the leaching rate of the composite ceramic solidified body is 10 <-7 > g.m <-2 >. D <-1 >. The preparation method of the solidified body comprises the following steps: by taking Zn2TiO4, CaHPO4, SiO2 and B2O3 as solidified body matrixes, adding lanthanide oxides Nd2O3, Gd2O3 and Er2O3, mixing, uniformly grinding, carrying out high-temperature solid-phase reaction on the obtained mixed powder, and naturally cooling to room temperature after the reaction is finished, so as to obtain the monazite phase and pyrochlore phase ceramic solidified body. The ternary multiphase ceramic solidified body has good mechanical performance and leaching resistance, the leaching rate of lanthanide series elements is in the order of magnitude of 10 <-7 > g.m <-2 >. D <-1 >, and the ternary multiphase ceramic solidified body has an excellent solidification effect and has reference significance for deep geological storage of high-level waste.

The invention relates to an iron-containing gadolinium-doped cerium oxide electrode material, a solid oxide battery and a preparation method, the chemical formula of the iron-containing gadolinium-doped cerium oxide electrode material is FexGd0. 1Ce0. 9-xO2-delta, x is more than or equal to 0.025 and less than or equal to 0.2, and delta is more than or equal to 0.05 and less than or equal to 0.2. The preparation method comprises the following steps: adding a gadolinium source, a cerium source and an iron source into deionized water according to a stoichiometric ratio, uniformly mixing to obtain a mixed solution, sequentially adding a complexing agent and a pH regulator into the mixed solution, and heating and stirring for reaction to obtain precursor gel; drying and crushing the precursor gel to obtain precursor powder; and calcining the precursor powder to obtain the iron-containing gadolinium-doped cerium oxide electrode material. The electrode material disclosed by the invention is relatively simple and uniform in component; when being used as a fuel electrode to be applied to a solid oxide electrolytic cell for CO2 electrolysis, the composite material shows excellent electrochemical performance, and can still keep a stable structure and good durability after long-term operation in a high-temperature CO2 atmosphere.

Provided is an inorganic fiber or inorganic flake having excellent neutron shielding properties. A formulation composed of a base component in which SiO2 and Al2O3 are the main components (in which the total mass ratio of SiO2 and Al2O3 in the base component is 0.60 or more) and a neutron shielding component composed of at least one of gadolinium, gadolinium oxide, samarium, samarium oxide, cadmium, or cadmium oxide is prepared in a ratio of 50 to 90 parts by mass of the base component and 10 to 50 parts by mass of the neutron shielding component, and then melted, thereby obtaining a good amorphous inorganic fiber and inorganic flake.

The invention discloses a carbon-doped molybdenum-based MOF (Metal Organic Framework) derived porous MRI (Magnetic Resonance Imaging) probe as well as a preparation method and anti-infection application thereof, and belongs to the technical field of nano medicines. According to the scheme, the method comprises the steps that a copper-molybdenum-based precursor is subjected to high-temperature sintering in an inert atmosphere, then NH3 is introduced, heat preservation is continued, a nitridation reaction is promoted, and a carbon-doped MoN MOF material is prepared; and immersing the material into a gadolinium salt solution, stirring, centrifuging, washing and drying to obtain the gadolinium ion-loaded porous MRI probe. According to the invention, efficient loading and stable fixation of gadolinium ions are realized, and the MRI imaging contrast ratio is improved while the biotoxicity risk is reduced. The porous skeleton structure is combined with the carbon doping design, so that the structural stability of the material in a biological environment is enhanced, and the performance maintenance of the probe during long-term use in vivo is ensured. The conductive network formed by the nitridation reaction further optimizes the magnetic response characteristic, and provides a basis for high-sensitivity imaging.

The application discloses a double-gas-chamber neutron detector, belonging to the technical field of nuclear radiation detection and particle detection, comprising a gadolinium film neutron conversion layer, two time projection chamber (TPC) modules and an optional energy quantifier module. After capturing thermal neutrons, the gadolinium film generates multi-state particles, and the two TPC modules realize 4π solid angle neutron detection through electronic signal coincidence. The application replaces the scarce 3 He with gadolinium, combines the track reconstruction capability of the double TPC module, significantly improves the neutron detection efficiency and signal-to-noise ratio, and is suitable for nuclear reactor monitoring, industrial material analysis, agricultural moisture detection and deep space exploration and other fields. Through electronic-gamma coincidence measurement and mode recognition, high-precision neutron signal reconstruction and environmental background suppression are realized.

The invention discloses a modification method of a ternary positive electrode material. The modification method comprises the following steps: S1, carrying out a co-precipitation reaction on a solution of transition metal sulfate in an inert gas atmosphere; a sulfate solution of rare earth elements is synchronously added in the coprecipitation process, and a ternary precursor with the surface coated with rare earth hydroxide is formed; and S2, mixing the ternary precursor obtained in the step S1 with a lithium source, calcining in an air atmosphere, and cooling to obtain the fast ion conductor coated ternary positive electrode material, the rare earth elements are selected from one or more of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium; the transition metal sulfate is soluble salt of Ni, Co and Mn. The rare earth element sulfate is added in the coprecipitation process, the rare earth element hydroxide is precipitated on the surface of the precursor, the lithium source is removed after filtering and drying, uniform mixing is performed, and the ternary positive electrode material which contains the rare earth element and is uniformly coated with the fast ion conductor is obtained after calcination, so that side reactions on the surface of the material are reduced; and the cycling stability of the positive electrode material is improved.

The invention discloses an MMP-9-targeted MRI (Magnetic Resonance Imaging) nanoprobe and a preparation method and application thereof, the MMP-9-targeted MRI nanoprobe is represented by Gd-ACC-MAP and comprises amorphous calcium carbonate and an aptamer covalently connected to the surface of the amorphous calcium carbonate, the calcium carbonate is doped with gadolinium, and the aptamer has a nucleotide sequence as shown in SEQ ID NO: 1. The MRI nanoprobe can be used for early diagnosis of aneurysm and evaluation of rupture risk of the aneurysm.

The application discloses a high-elasticity-modulus magnetic memory alloy prepared based on a liquid die forging method and a preparation method thereof, and belongs to the technical field of magnetic memory alloy preparation. 51‑x Ni 25 Ga 24 Gd x , wherein x=0.4-0.6. The preparation method of the high-elasticity-modulus magnetic memory alloy prepared based on the liquid die forging method comprises the following steps: taking nickel powder, manganese powder, gallium powder and gadolinium powder according to atomic percentage, ball-milling and mixing, and then sequentially performing liquid die forging and pressure forming to obtain the high-elasticity-modulus magnetic memory alloy. The application adopts trace rare earth element Gd element to replace Mn element, and adopts a liquid die forging technology to prepare a high-performance magnetic memory alloy. The magnetic memory alloy has the characteristics of high elastic modulus and small brittleness, and solves the problems of large brittleness and low elastic modulus of the existing Mn2NiGa magnetic memory alloy.

The invention relates to a microbial growth activation accelerant based on rare earth elements as well as a preparation method and application thereof, and belongs to the field of resources and environments. The microbial growth activation accelerant based on the rare earth elements is prepared from the following components: 1 to 150g of a rare earth compound, 0.2 to 2g of pantothenic acid, 0.2 to 2g of nicotinic acid, 0.02 to 0.1 g of nicotinamide and 1000g of deionized water, the rare earth compound is one or combination of more of chlorides of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium and yttrium, nitric acid compounds and sulfuric acid compounds. A large number of cheap light rare earth elements are used as raw materials of the microbial accelerator, a new utilization approach is provided for the light rare earth elements, the light rare earth elements are converted into high-added-value products, pollution of the light rare earth elements to the environment is reduced, and meanwhile new elements are introduced into the field of microbial accelerators. More importantly, the preparation method of the microbial growth activation accelerant based on the rare earth elements provided by the invention is simple in production process and convenient for large-scale production.

The invention belongs to the technical field of functional ceramic manufacturing, and particularly relates to a high-entropy cobalt-based perovskite oxygen permeation membrane material and a preparation method and application thereof. According to the invention, La0. 5Sr0. 5CoO3 is used as a base material, and three different lanthanide elements of neodymium, gadolinium and praseodymium are doped at the site A of the base material, so that a series of high-entropy oxygen permeation membranes with carbon dioxide resistance and high stability are synthesized. The high-entropy cobalt-based oxygen permeation membrane material prepared by the method is compact in surface, has no obvious cracks, defects and through holes, has excellent mechanical properties, and can stably exist in low-oxygen corrosive atmospheres such as He / CO2 for 100 hours. Meanwhile, the high-entropy cobalt-based oxygen permeation membrane material prepared by the method has good oxygen permeation performance. A new way is provided for improving the structure and oxygen permeation stability of the OTM, and the carbon dioxide capture and storage efficiency of the OTM in the oxygen-enriched combustion technology is further improved.

The invention relates to the field of high-temperature thermal resistance coatings, in particular to a material selection and preparation process of a low-infrared-transmittance coating, and particularly relates to a preparation method of a high-scattering-rate high-temperature thermal resistance coating, a base material of the high-scattering-rate high-temperature thermal resistance coating is Gd2Zr2O7, and the high-scattering-rate high-temperature thermal resistance coating further comprises a second-phase material; firstly, a required second-phase material is screened on the basis of machine learning in combination with experiments and a first principle, then a PS-PVD gas phase-solid phase codeposition method is adopted, the high-scattering-rate high-temperature thermal resistance coating is prepared, according to the obtained coating, a high-refractive-index-low-refractive-index interface between GdFeO3 particles and Gd2Zr2O7 gas phase columnar crystals can effectively increase scattering of infrared radiation, and the heat resistance of the coating is improved. And the vapor phase and solid phase co-deposited columnar crystals have uniform thermal physical properties, so that excellent coating binding force and excellent anti-sintering performance are provided.

The invention relates to a preparation method of rare earth metal gadolinium doped red carbon dots, and belongs to the technical field of nano material synthesis and biomedical imaging. Aiming at the problems of low gadolinium ion doping efficiency, more impurity residues and single function in the existing carbon dot preparation, the method comprises the following steps: dissolving p-phenylenediamine and dicyandiamide in a specific molar ratio, adding a GdCl solution, and carrying out ultrasonic dispersion to form a uniform system; performing hydrothermal reaction by adopting a staged temperature control program to optimize the crystallinity of the carbon matrix; high-efficiency removal of impurities is realized through high-speed centrifugation, microporous filtration and molecular weight interception dialysis; and finally, performing low-temperature vacuum drying to obtain a powder product. The obtained gadolinium-doped red carbon dots have the characteristics of uniform particle size, abundant surface hydrophilic functional groups, stable red fluorescence emission and synergistic enhancement of magnetic responsiveness, and can be used for constructing a bimodal fluorescence-magnetic resonance imaging and diagnosis and treatment integrated platform in a living body.

The invention relates to a novel functional material for X-ray protection, in particular to a liquid metal flexible shielding material and a preparation method and application thereof. The material comprises liquid metal and solid metal, the liquid metal serves as a solvent to be filled in gaps of the solid metal, the liquid metal is gallium, gallium indium, gallium indium tin, gallium indium tin zinc or mercury, and the solid metal is selected from one or more of indium, tin, gold, platinum, iridium, zirconium, niobium, molybdenum, ruthenium, osmium, rhenium, rhodium, tungsten, antimony, palladium, tantalum, hafnium, lutetium, lead, ytterbium, thulium, bismuth, silver, erbium, holmium, dysprosium, terbium, gadolinium, samarium, neodymium, lanthanum, praseodymium, cerium and europium. On the basis of compounding of the liquid metal solvent and the solid metal solute based on the liquid metal combinatology, the liquid metal and the solid metal are jointly used for protecting X-ray radiation, the comprehensive performance of X-ray protection is improved, and meanwhile the variety and number range of selectable metal elements is widened.

The invention provides a photocatalytic material and a method for synergistically promoting growth of submerged plants by using the photocatalytic material and an underwater full-wavelength light source. The photocatalytic material comprises modified titanium dioxide, modified graphene and a surfactant, the modified titanium dioxide is prepared from the following raw materials: sodium alginate, gadolinium nitrate and tetrabutyl titanate; the modified graphene is prepared from the following raw materials: graphene, ascorbic acid, acrylic acid and ethyl cellulose. When a photocatalytic net prepared from the photocatalytic material is placed in a polluted river or a polluted pond and the like, even if the photocatalytic net is below the water surface, chemical oxygen demand, ammonia nitrogen, total phosphorus and total nitrogen can still be reduced, and dissolved oxygen can be obviously increased; and even if the prepared photocatalytic net is placed at a deeper position below the water surface, the prepared photocatalytic net still has lower chemical oxygen demand, ammonia nitrogen, total phosphorus and total nitrogen and higher dissolved oxygen when being placed at a deeper position below the water surface compared with the prepared photocatalytic net which is placed at a position closer to the water surface, and meanwhile, by compensating the light source underwater, the photocatalytic net can be more stable in water quality. Therefore, the planting and growth of submerged plants are further improved.

This invention discloses a gadolinium-containing rare earth composite inoculant for gray cast iron cylinder blocks. Its chemical composition and mass percentages are as follows: Si: 45-50%, RE: 4-12% (Gd: 20%, other rare earth elements: 80%), Cr: 4-12%, Mn: 3-9%, Ca: 0.5-1.0%, Ba: 2.0-3.0%, Al: 1-2%, Cu: 5%, with the balance being Fe. This inoculant incorporates rare earth elements, chromium, manganese, calcium, barium, and aluminum. On one hand, the RE element purifies the molten iron and inhibits rapid cooling; on the other hand, the interaction of these elements enhances the inoculation ability, promotes the formation of type A graphite, makes the graphite more curved and refined with blunted ends, refines and increases the pearlite content, reduces the pearlite lamellar spacing, and appropriately increases the eutectic cluster content. This improves the strength and stiffness of the gray cast iron, and enhances the cross-sectional sensitivity and machinability of the casting.

The semiconductor device includes a first substrate, a first active pattern including a first lower pattern and a plurality of first sheet patterns, a first gate structure surrounding the plurality of first sheet patterns, a first high-k insulating film disposed between the first gate structure and the plurality of first sheet patterns, and a second high-k insulating film disposed between the first gate structure and the plurality of first sheet patterns. A semiconductor device includes a plurality of first sheet patterns, a first high-k insulating film disposed between the plurality of first sheet patterns, a first gate insulating film disposed between the plurality of first sheet patterns and the first high-k insulating film, a plurality of second sheet patterns, a second gate structure surrounding the plurality of second sheet patterns, and a second high-k insulating film disposed between the second gate structure and the plurality of second sheet patterns, the second high-k insulating film includes a second dopant different from the first dopant, and the second dopant includes at least one of silicon, aluminum, zirconium, yttrium, scandium, nitrogen, gadolinium, and germanium.

The invention discloses a medium-temperature silver flower wire solder and a preparation method thereof, the medium-temperature silver flower wire solder comprises 17-19.5% of copper, 0.01-2% of zinc, 0.01-1.4% of indium, 0.01-0.5% of germanium, 0.01-0.4% of tin, 0.01-0.3% of rare earth and the balance silver and inevitable impurity elements, and the rare earth is one or more of cerium, yttrium, lanthanum, neodymium and gadolinium. According to the welding flux, silver, copper, zinc, indium, germanium, tin, rare earth and the like serve as main alloy elements, the component proportion of the main alloy elements is optimized and adjusted, the alloy formula is optimized, and the medium-temperature-grade silver welding flux which is excellent in comprehensive performance and can well meet the welding requirement of the silver wire jewelry is prepared.

The invention discloses a high-strength magnesium-zinc-yttrium rare earth 3D printing alloy and application, and belongs to the technical field of 3D printing alloys, the high-strength magnesium-zinc-yttrium rare earth 3D printing alloy comprises the following components in parts by mass: 87.5-91.0 parts of magnesium, 6.0-8.0 parts of zinc, 2.0-3.0 parts of yttrium, 1.5-2.5 parts of gadolinium, 1.0-2.0 parts of scandium, 0.8-1.5 parts of zirconium, 0.5-1.2 parts of calcium and 0.28-0.6 part of manganese, the total mass of metal impurities does not exceed 0.15 part, and the balance is magnesium. A single metal impurity does not exceed 0.05 part; the alloy application comprises the following steps of S1, smelting and atomization, S2, screening and treatment, S3, printing forming and S4, aftertreatment. The alloy with excellent 3D printing formability, ultrahigh strength, good toughness and reliable thermal stability is developed through collaborative design of multi-component components, accurate control of key process parameters and systematic optimization of a post-treatment system; an ideal material is provided for manufacturing of light-weight and high-performance complex components in the fields of aerospace, high-end medical instruments and the like.

The invention provides a microwave phase measurement system based on magneton-photon coupling characteristics. According to the system, an integrated electrode support / GGG / YIG / Pt multilayer structure is embedded in a microwave cavity, and magnetons carry microwave phase information through coupling of the magnetons and photons in the YIG. Magneton precession of the YIG layer causes spin current to be generated in the Pt layer, the spin current is converted into measurable voltage signals through inverse spin Hall effect, and high-resolution phase measurement is realized by means of frequency mixing, coherent detection and the like. The method is high in anti-interference capability, can realize high-sensitivity and low-cost microwave phase measurement, and is expected to be used in the fields of spintronics, microwave measurement, quantum information reading and the like.

The present invention provides a method for providing a composite luminescent particle, comprising: (a) providing (i) a luminescent material comprising (A1-xBx) 3 (C1-yDy) 5O12 nanoparticles or a precursor thereof, A comprising one or more of yttrium, lutetium, gadolinium, lanthanum; b comprises one or more rare earth elements; c comprises one or more of aluminum, gallium and scandium; d comprises one or more transition metal ions; 0 < = x < = 1, 0 < = y < = 1, x + ygt; 0; and (ii) also providing an oxide material precursor, the oxide material having a melting point of at least 850 DEG C; (b) mixing (i) a luminescent material comprising (A1-xBx) 3 (C1-yDy) 5O12 nanoparticles or a precursor thereof with (ii) an oxide material precursor; (c) curing the oxide material precursor to obtain cured particles which comprise a luminescent material and an oxide material coating layer; (d) heating the cured particles at a first temperature of 600 DEG C or more for a first duration of 10 minutes or more; and (c) heating the cured particles at a second temperature of 700 DEG C or more for a second duration of 1 hour or more in a reducing atmosphere including carbon monoxide.