424 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 invention belongs to the field of magnetic refrigeration materials, and particularly discloses a gadolinium-based molybdate magnetic refrigeration material and a preparation method and application thereof. The gadolinium-based molybdate magnetic refrigeration material comprises GdXMoO4, wherein X is F, Cl, Br or I; the magnetic phase change temperature of the gadolinium-based molybdate magnetic refrigeration material is less than 2K, and the maximum magnetic entropy change of the gadolinium-based molybdate magnetic refrigeration material is greater than or equal to 12J. Kg <-1 >. K <-1 > when the magnetic field change is 0-50kOe. The gadolinium-based molybdate magnetic refrigeration material disclosed by the invention has extremely low magnetic phase transition temperature, has relatively high magnetocaloric efficiency in a low magnetic field, is an extremely low temperature region magnetic refrigeration material with excellent performance, and has a wide application prospect in the field of extremely low temperature magnetic refrigeration.

The invention provides a method for providing composite luminescent particles, comprising: (a) providing (i) a luminescent material, comprising (A1-xBx)3(C1-yDy)5O12 nanoparticles or a precursor therefor, wherein A comprises 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; and wherein 0≤x≤1, 0≤y≤1, and x+y>0; and (ii) further providing a precursor of an oxide material, wherein said oxide material has a melting point of at least 850°C; (b) mixing said (i) luminescent material comprising (A1-xBx)3(C1-yDy)5O12 nanoparticles or a precursor therefor and (ii) said precursor of an oxide material; (c) curing said precursor of said oxide material to obtain a cured particle, said cured particle comprising said luminescent material, and a coating of said oxide material; (d) heating said cured particle at a first temperature for a first duration, wherein said first temperature is 600 °C or higher, wherein said first duration is 10 minutes or more; and (e) heating said cured particle under a reducing atmosphere comprising carbon monoxide at a second temperature for a second duration, wherein said second temperature is 700 °C or higher, and wherein said second duration is 1 hour or more.

The present application relates to the technical field of tungsten alloy materials, and in particular to a tungsten alloy wire, a preparation method therefor, and a use thereof in cutting of a semiconductor material. The tungsten alloy is composed of the following elements in percentage by mass: 0.4-1.1 wt% of L, 0.001-0.25 wt% of Z, and the balance of tungsten and inevitable impurities, wherein L is one or more than two of lanthanum, cerium, praseodymium, neodymium, gadolinium and erbium, and Z comprises oxygen and carbon. The wire diameter of the wire is 20-60 μm, the wire contains linear L or a compound of L along the wire axis direction, and the radial average width D of L or the compound of L is smaller than or equal to 5 nm. According to the present application, the linear L element is doped between tungsten base bodies, and the radial average width of L is controlled to be smaller than or equal to 5 nm, so that the wire has the tensile strength of 5000 MPa or above under the wire diameter of 20-60 μm, and the machining performance of the tungsten alloy wire is enhanced.

The present invention relates to the technical field of tungsten alloy materials, and in particular to a tungsten alloy wire, and a preparation method therefor and a use thereof. The tungsten alloy is composed of the following elements in percentage by mass: 0.45-0.9 wt% of L, 0.05-0.2 wt% of oxygen, and the balance being tungsten and inevitable impurities, wherein L is one or more of lanthanum, cerium, praseodymium, neodymium, gadolinium, and samarium, the wire has a wire diameter of 20-60 μm, in the wire, L or compounds of L exist in the axial direction of the wire in a linear shape, and the average width D of L or the compounds of L in the radial direction is less than or equal to 5 nm. The element L is controlled to be doped between the tungsten base materials in a linear shape, and the average width D of L in the radial direction to be less than or equal to 5 nm, so that cracks and wire breakage caused by second-phase particles in the subsequent pressure machining process are greatly reduced, thereby guaranteeing the mechanical strength of the tungsten alloy wire, and thus the wire has a tensile strength of 5000 MPa or above under a wire diameter of 20-60 μm, and the machining performance of the tungsten alloy wire is enhanced.

The invention discloses a gadolinium boron molybdate magnetic refrigeration material with triangular magnetic resistance and a preparation method and application of the gadolinium boron molybdate magnetic refrigeration material. The chemical formula of the material is Gd2B2MoO9, the material belongs to a triclinic system, and the space group is P-1; the crystal structure has the characteristic that nearest rare earth Gd ions have magnetic resistance file; the material is prepared by a solid phase method or a sol-gel method; the magnetic phase change temperature of the material is 0.7-0.9 K, the material shows a remarkable magnetothermal effect at low temperature, the maximum isothermal magnetic entropy change values of the material are 30.0-35.0 J / kg.K and 51.0-55.0 J / kg.K respectively under the magnetic field change of 0-2T and 0-5T, and the material can be applied to low-temperature magnetic refrigeration. The gadolinium boron molybdate Gd2B2MoO9 material with triangular magnetoresistance provided by the invention has the advantages of low raw material price, simple process and lower equipment requirement, and is suitable for industrial production.

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 relates to the technical field of tungsten alloy materials, in particular to a tungsten alloy wire, a preparation method thereof and application of the tungsten alloy wire in semiconductor material cutting, and tungsten alloy is composed of the following elements of, by mass, 0.4-1.1 wt% of L, 0.001-0.25 wt% of Z and the balance tungsten and inevitable impurities. Wherein L is one or more than two of lanthanum, cerium, praseodymium, neodymium, gadolinium and erbium; z comprises oxygen and boron; the wire rod has a wire diameter of 20-60 [mu] m, the wire rod has a linear L or L compound in the axial direction, and the radial average width D of the L or L compound is less than or equal to 5 nm. The linear element L is doped between the tungsten matrixes, and the radial average width of the element L is controlled to be smaller than or equal to 5 nm, so that the wire has the tensile strength of 5000 MPa or above under the wire diameter of 20-60 microns, and the machining performance of the tungsten alloy wire is enhanced.

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 discloses application of potassium-based rare earth fluoride in magnetic refrigeration and a magnetic refrigeration device, and belongs to the field of magnetic functional materials. The series of magnetic card materials are single-phase potassium-based gadolinium fluoride, and the chemical formula is KGdF4. The series of magnetic card materials can obtain a large magnetocaloric effect under a low driving magnetic field, and a 0-5kOe, 0-10kOe or 0-20kOe variable magnetic field is applied to the series of magnetic card materials. Under a magnetic field of 0-20 kOe, isothermal magnetic entropy changes of 29.18 J * kg <-1 > * K <-1 >, 27.92 J * kg <-1 > * K <-1 > and 31.99 J * kg <-1 > * K <-1 > are obtained at the temperature of 2K. When the cubic phase KGdF4 does not have an external magnetic field, the specific heat peak value at a low-temperature 2K position reaches 19.20 J * kg <-1 > * K <-1 >; and when the external magnetic field is increased to 2T, the low-temperature specific heat peak value reaches 72.15 J * kg <-1 > * K <-1 >.

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 relates to the technical field of sensors, and mainly relates to a narrow hysteresis width thin film material and a preparation method and application thereof. By doping the vanadium dioxide film and introducing magnetic rare earth elements gadolinium (Gd) and titanium (Ti), the rare earth elements as impurity ions can effectively replace or destroy V4 +-V4 + covalent bonds of vanadium ions, so that defects in the film are increased to regulate and control the phase change characteristic of the vanadium dioxide film, and the provided film material also has a narrow hysteresis width and can be applied to the field of thin film materials. And the wide application breakthrough of zero hysteresis width can be realized, and meanwhile, the material also has excellent reversible phase change and cycling stability and ultra-sensitive temperature response and rapid switching characteristics, and can provide powerful support for the development of the sensor field.

The invention relates to the technical field of tungsten alloy materials, in particular to a tungsten alloy wire, a preparation method thereof and application of the tungsten alloy wire in semiconductor material cutting, and tungsten alloy is composed of the following elements of, by mass, 0.4-1.1 wt% of L, 0.001-0.25 wt% of Z and the balance tungsten and inevitable impurities. Wherein L is one or more than two of lanthanum, cerium, praseodymium, neodymium, gadolinium and erbium; z comprises oxygen and carbon; the wire rod has a wire diameter of 20-60 [mu] m, the wire rod contains a linear L or L compound in the axial direction, and the average radial width D of the L or L compound is less than or equal to 5 nm. The linear element L is doped between the tungsten matrixes, and the radial average width of the element L is controlled to be smaller than or equal to 5 nm, so that the wire has the tensile strength of 5000 MPa or above under the wire diameter of 20-60 microns, and the machining performance of the tungsten alloy wire is enhanced.

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.

The invention provides a sintered neodymium-iron-boron magnet and a preparation method thereof. The sintered neodymium-iron-boron magnet comprises a neodymium-iron-boron sintered body and a heavy rare earth layer, wherein the heavy rare earth layer comprises heavy rare earth and an oxide; part or all of the surface of the neodymium-iron-boron sintered body is covered by the heavy rare earth layer, and heavy rare earth is distributed in an area, at least 3.5 mm deep from the surface, of the neodymium-iron-boron sintered body covered by the heavy rare earth layer; the oxide is one or more of aluminum oxide, silicon oxide, calcium oxide, magnesium oxide, zirconium oxide, copper oxide and zinc oxide, and the heavy rare earth is one or more of dysprosium, terbium, holmium and gadolinium. At least one part of the surface of the neodymium-iron-boron sintered body is covered with the heavy rare earth layer containing the oxide, when the heavy rare earth is diffused at a high temperature, the heavy rare earth enters the neodymium-iron-boron sintered body, the oxide is high in melting point, relatively thick and left on the surface of the neodymium-iron-boron sintered body, the effect of a spacer is achieved, magnet adhesion can be effectively prevented when the heavy rare earth is diffused, and the service life of the magnet is prolonged. And the preparation of the magnet is more convenient, and industrial application is realized.

The present application relates to the field of magnet technology, and specifically discloses a high coercive force NdFeB magnetic material and a preparation method thereof. The high coercive force NdFeB magnetic material of the present application includes a magnetic material body, a heavy rare earth layer and a light rare earth layer. The magnetic material body is mainly made of the following raw materials: neodymium, gadolinium, copper, boron, cerium, aluminum, niobium iron, and iron; the preparation method includes: the preparation of the magnetic material body includes the following steps: melt stripping, hydrogen crushing and grinding, pressing and molding, and sintering to obtain a magnetic material body one; the preparation of the heavy rare earth layer includes the following steps: slicing, mixing, heating and melting, evaporation, and forming a thin film on one side of the slice; infiltration, quenching and tempering treatment to obtain a magnetic material body two; the preparation of the light rare earth layer includes the following steps: preparing a light rare earth alloy sheet, the light rare earth alloy sheet is attached to the side of the magnetic material body two opposite to the heavy rare earth layer, and thermal diffusion and tempering are performed to obtain the magnetic material body two. The NdFeB magnetic material of the present application has high coercive force and low cost.

The invention relates to a process for the preparation of the gadolinium dimeric contrast agent [p-[1-[bis[2-(hydroxy-KO)-3-[4,7,10-tris[(carboxy-KO)methyl]-1,4,7,10-tetraazacyclododec-1-yl-K / V1,K / V4,K / V7,K / V10]propyl]amino]-1-deoxy-D-glucitolato(6-)]]di-gadolinium complex. Such process includes preparation steps carried out one-pot and without isolation of the obtained intermediates. The gadolinium dimeric contrast agent can be for use in diagnostic imaging, in particular in Magnetic resonance Imaging (MRI).

The invention discloses a YIG material for substrate surface sputtering and a preparation method thereof, and relates to the technical field of electronic information materials. The surface composite layer is composed of a main body crystal phase Y3Fe4.8Ta0. 2O12, HfO2 quantum dots distributed along a crystal boundary and a Br (at) ZrO2 core-shell structure, the interface transition area contains gadolinium ions, the particle size of the HfO2 quantum dots is set to be 3-5 nm, and the surface density of the HfO2 quantum dots is set to be 2 * 10 < 12 >-4 * 10 < 12 > / cm < 2 >. According to the method, the HfO2 quantum dots with the particle size of 3-5 nm are introduced to the grain boundary, grain boundary diffusion is limited through the quantum size effect, meanwhile, carboxyl functional groups on the surfaces of the HfO2 quantum dots are bonded with main body crystal phases, and therefore the local pinning effect can be formed, and the sputtering yield fluctuation of the yttrium element is compressed from + / -5.2% to + / -0.8%.

Low-molecular weight gadolinium (Gd)-based MR contrast agents for PSMA-specific T1-weighted MR imaging are disclosed. The (Gd)-based MR contrast agents exhibit high binding affinity for PSMA and exhibit specific T1 contrast enhancement at PSMA+ cells. The PSMA-targeted Gd-based MR contrast agents can be used for PSMA-targeted imaging in vivo. 86Y-labeled PSMA-binding ureas also are provided, wherein the PSMA-binding ureas also are suitable for use with other radiotherapeutics.

The invention discloses a high-strength and high-thermal-conductivity magnesium alloy plate and a preparation method thereof, and relates to a high-strength and high-thermal-conductivity rolled magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following components in percentage by mass: 1.0-7.0% of element Zn, 0.2-2.0% of element Mn, 1.5-7.0% of element X and the balance of Mg, and the element X is one or more than two of yttrium, gadolinium, neodymium or erbium. Pure Mg ingots, Mg-Zn intermediate alloy, Mg-Mn intermediate alloy and Mg-X intermediate alloy serve as raw materials and are smelted into high-quality cast ingots, and the high-strength and high-thermal-conductivity magnesium alloy plate is obtained through homogenizing heat treatment and hot rolling deformation. The tensile yield strength of the prepared rolled magnesium alloy can reach 340-370 MPa, the tensile strength is 360-400 MPa, the ductility is 5%-10%, the room-temperature heat conductivity is 130-140 W / (m.K), meanwhile, the excellent mechanical property and heat-conducting property are achieved, and the rolled magnesium alloy can be used as structural materials of electronic devices such as aerospace and satellite radar antennas.

The present invention relates to a low-thermal-conductivity ceramic powder for a thermal barrier coating (TBC) of an ultrahigh-temperature gas turbine, and a TBC using same. The presented coating powder is composed of a ceramic top coating powder co-doped with lanthanide rare earth elements, and has a coating layer structure composed of a lower ceramic coating layer (first layer) that has a thickness of approximately 100-150 μm and is coated with a conventional yttria-stabilized zirconium oxide (YSZ, 7-8 wt.%), and an upper ceramic coating layer (second layer) that has a thickness of approximately 400-450 μm and is coated with a mixture (Gd-Yb-Y co-doped ZrO2, YGYZ) of zirconium oxide (ZrO2), which is the TBC powder of the present invention and is co-doped with oxides of gadolinium (Gd), ytterbium (Yb) and yttrium (Y), which are lanthanide rare earth elements.

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 relates to a process for the preparation of dimeric contrast agents for use in Magnetic resonance Imaging (MRI), in particular [μ-[1-[bis[2-(hydroxy-κO)-3-[4,7,10-tris[(carboxy-κO)methyl]-1,4,7,10-tetraazacyclododec-1-yl-κN1,κN4,κN7,κN10]propyl]amino]-1-deoxy-D-glucitolate(6-)]]di-gadolinium complex, which includes preparation steps carried out one-pot (without isolation of the obtained intermediate) and precipitation of at least part of free gadolinium metal ions in excess.

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 present invention discloses a blue light excited wide half-width near-infrared fluorescent ceramic and a preparation method and application thereof. The chemical formula of the near-infrared fluorescent ceramic is (Gd 1‑x Ca x )3(Sc 1‑y Cr y )2(Al 1‑ z Si z )3O 12 , where 0.02≤ x ≤0.06,0.004≤ y ≤0.012,0.04≤ z ≤0.12, x : z =1:(1.5-2); The near-infrared fluorescent ceramic is prepared by a solid phase reaction method combined with high-temperature sintering. The valence state of the Cr ion in the luminescent center of the near-infrared fluorescent ceramic of the present invention is +3, the main peak of its emission spectrum is between 780-850nm, and the half-width is between 240-280nm. Under the excitation of a high-power blue light LED or LD, near-infrared luminescence of 700-950nm is achieved. The phase structure of the near-infrared fluorescent ceramic of the present invention is gadolinium scandium aluminum garnet, which has the advantages of high luminous efficiency and wide half-width of the emission spectrum.

The invention provides a layered-perovskite biphase potassium ion battery positive electrode material as well as a preparation method and application thereof, and belongs to the field of new energy materials. The preparation method of the material comprises the following steps: S1, weighing a proper amount of a potassium source, a manganese source and a praseodymium (or lanthanum and gadolinium) source in a ball milling tank; s2, ethanol is added for ball milling treatment, and a mixture is obtained; s3, drying the mixture; s4, the obtained dried product is subjected to heat treatment, the heat treatment temperature is 850-900 DEG C, the heat treatment time is 12-15 h, then the dried product is cooled to the room temperature, and a black product is obtained; and S5, grinding, sieving and drying the obtained product to obtain the positive electrode material of the potassium ion battery. According to the preparation method, a special sintering atmosphere is not needed, the layered-perovskite double-phase positive electrode material can be obtained only through one-time calcination, and the prepared positive electrode material has better circulation and rate performance compared with a layered single-phase positive electrode material.

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.