13 results about "Melt quenching" patented technology

The application discloses a high-density Tb 3+ The application discloses a doped full-oxide germanate scintillation glass and a preparation method thereof. The scintillation glass comprises a matrix glass and a luminescent center. The matrix glass is composed of oxides, and specific components are GeO2-Al2O3-BaO-La2O3-Lu2O3-Gd2O3; and the luminescent center is a Tb 3+ The application does not involve Pb, Cd and other high-pollution heavy metals, is environment-friendly, does not contain B2O3, P2O5 and other substances with high phonon energy, and is beneficial to improving the luminescent efficiency of Tb 3+ The full-oxide scintillation glass is prepared by a melting quenching method, and has the characteristics of environment-friendliness and high density.

This invention provides a lithium-ion battery cathode material of lithium manganese iron phosphate and its preparation method. The preparation method specifically includes: S1, preparation by dopamine oxidative self-polymerization; S2, preparation of ultrafine LMFP@C composite material by single-point doping; S3, preparation of single-crystal LMFP@C. ‑ Preparation of @C double-coated multi-site doped composite material: LMFP@C ultrafine powder was annealed in a multi-functional sintering furnace at 270°C-650°C for 1-4 hours to form Na + / La 3+ / Cl ‑ LMFP@Cl, a multi-site doped single-crystal LMFP double-shell composite material that partially replaces Li sites, Mn / Fe sites, and PO4 sites, respectively. ‑ @C. This invention addresses the problems of manganese leaching, poor conductivity, and poor high-temperature stability in lithium manganese iron phosphate cathode materials. It synergistically utilizes single crystallization, multi-site multi-component element doping, and surface double coating measures. The modification strategy is achieved through oxidative self-polymerization conformal coating-melt quenching-recrystallization annealing technology. It has the advantages of simple operation, liquid phase synthesis, high yield, and low cost, making it suitable for large-scale production.

The application discloses an organic-inorganic hybrid perovskite glass material with long afterglow phosphorescence and a preparation method thereof. The method is to use metal salt and organic ion salt as raw materials, and a low-cost melt quenching method without any solvent participation is used to obtain the organic-inorganic hybrid perovskite glass material with long lifetime phosphorescence. There is a strong intramolecular interaction between the metal salt anion and the organic cation, which can greatly inhibit the thermal vibration and non-radiative transition of the organic luminescent group; in addition, the formation of the glass provides a rigid molecular environment for the chromophore. The organic-inorganic hybrid perovskite glass material prepared by the application has high transparency, high hardness and high-efficiency long-lifetime phosphorescence emission performance. The preparation method of the application has low cost, simple operation and is easy to mass industrial production, and has wide application prospects in the fields of anti-counterfeiting, information security and decoration.

The application provides an iron-based amorphous soft magnetic alloy strip, a preparation method and application thereof, and relates to the technical field of soft magnetic materials. The iron-based amorphous soft magnetic alloy strip realizes the balance of high saturation magnetic induction intensity, low coercivity, high amorphous forming ability and excellent processing performance through the synergy of accurate regulation of component proportion, element function, complete amorphous structure and heat treatment process. B s The torque output and power density of the motor are ensured, the low iron loss and high efficiency of the motor in high-frequency operation are ensured, and the excellent toughness meets the needs of precise machining of the iron core and long-term operation reliability. H c The torque output and power density of the motor are ensured, the low iron loss and high efficiency of the motor in high-frequency operation are ensured, and the excellent toughness meets the needs of precise machining of the iron core and long-term operation reliability. The preparation method of the iron-based amorphous soft magnetic alloy strip is designed through the process of vacuum induction melting + melt quenching + longitudinal magnetic field heat treatment, accurately matches the performance requirements of the component system, has the industrialization advantages of process stability, high efficiency and controllable cost, and provides a reliable technical path for the large-scale production and high-end application of the iron-based amorphous soft magnetic alloy strip.

The invention relates to the technical field of photoelectric materials and scintillators, and particularly discloses ionic rare earth complex scintillator glass as well as a low-temperature melting preparation method and application thereof. According to the invention, a low-temperature melting and quenching process is developed, the crystalline ionic europium complex is directly melted and rapidly cooled under a solvent-free condition, and direct preparation of the ionic rare earth complex transparent scintillator glass is realized. The prepared glass scintillator material has high transparency, high luminous efficiency, high rare earth content and excellent machinability, light scattering caused by particle aggregation and phase separation in a traditional composite film is fundamentally eliminated, and the concentration quenching limitation is broken through. The glass scintillator material shows excellent luminescence performance under X-ray excitation, and the imaging resolution and the detection sensitivity can be remarkably improved. The invention provides a feasible technical path for the development of a novel rare earth scintillator material, and has important application prospects in the fields of medical imaging, nondestructive testing, high-energy radiation detection and the like.

The invention provides a lithium iron manganese phosphate composite material for a positive electrode of a lithium ion battery and a preparation method. The preparation method specifically comprises the following steps: S1, dopamine oxidation auto-polymerization preparation; s2, preparing a unit point doped superfine LMFP (at) C composite material; and S3, preparation of the single crystal LMFP (at) Cl-(at) C double-coated multi-site doped composite material: annealing the LMFP (at) C ultrafine powder in a multifunctional sintering furnace at 270-650 DEG C for 1-4 hours to form the multi-site doped single crystal LMFP double-coated shell composite material LMFP (at) Cl-(at) C with Na < + > / La < 3 + > / Cl <-> respectively and partially replacing Li site, Mn / Fe site and O site of PO4. Aiming at the problems of dissolution of manganese, poor conductivity and poor high-temperature stability of a lithium manganese iron phosphate positive electrode material, the modification strategy is realized through an oxidation auto-polymerization conformal coating-melting quenching-recrystallization annealing technology by synergistically utilizing measures of single crystallization, multi-site multi-component element doping, surface double coating and the like; the method has the advantages of simplicity in operation, liquid phase synthesis, high yield, low cost and suitability for large-scale production.

The invention discloses a femtosecond laser etched quantum dot glass preparation method and anti-counterfeiting application, and belongs to the technical field of quantum dot luminescent materials and laser micromachining. According to the glass material, precursor glass is prepared through a melting quenching method, then femtosecond laser direct writing etching and subsequent heat treatment are conducted, femtosecond laser is used for etching the glass, and a high-resolution patterned light-emitting structure can be achieved on the surface of the glass. After fluorescence quenching of the pattern in an air environment, fluorescence recovery can be achieved through low-temperature annealing (300 DEG C), and the reversible encryption-decryption function is achieved. The perovskite quantum dot solves the problems of poor environmental stability and difficult patterning processing of the traditional perovskite quantum dot, and is suitable for the fields of optical storage, anti-counterfeiting marks, reconfigurable photoelectric devices and the like.

The application discloses a highly restructured Ni-doped glassy MOFs electrocatalyst and a preparation method and application thereof, a solution containing a cobalt salt and an organic ligand is subjected to a hydrothermal reaction to obtain ZIF-Co powder; the mixture of the ZIF-Co powder and a nickel source is used as a powder precursor; the powder precursor is loaded on an electrode material to obtain an electrode material loaded with the catalyst; and the electrode material loaded with the catalyst is subjected to glassification through a melt quenching technology, and then is restructured to obtain the highly restructured Ni-doped glassy MOFs electrocatalyst. The application promotes electrochemical surface restructuring by using the glassification, and obtains the glassy MOFs catalyst with rich active sites, thereby solving the problem that the active sites of the MOFs material are not easy to expose. In addition, the glassy MOFs can be directly fused and attached on the electrode material without a binder, thereby solving the problem that the powder catalyst is difficult to process, and facilitating device assembly and industrial scale production.

The invention relates to a luminescent phosphate fluorescent glass ceramic capable of rapidly responding to radiation dose detection and a preparation method and application thereof.The luminescent phosphate fluorescent glass ceramic is prepared from Na2CO3, BaCO3, NH4H2PO4 and H3BO3 through mixed grinding, calcination, melting quenching, grinding, compression molding, heat treatment and cooling, Dy < 3 + > is doped in a glass ceramic matrix in the form of a compound, and the Dy < 3 + > ion doped NaBaPO4 glass ceramic is obtained. Cold white light is emitted under the excitation of a specific excitation wavelength, through experiments and calculation, the sample contains three shallow trap energy levels with different depths, the characteristic endows the sample with remarkable rapid response performance, and charge carriers can be rapidly released in the optical excitation reading process, so that shorter signal reading time and rapid bleaching capability are realized, and the sensitivity of the sample is improved. And good linear dose response to high-energy rays in a range of 0.1-200 Gy is realized. The fluorescent material has good white light luminescence characteristic, rapid response characteristic, wide radiation dose response performance and good reusability, and can be applied to the field of luminescence and radiation dose detection as a novel fluorescent material.

The application discloses a fluorozinc-aluminum-based glass ceramic containing ZnF2 crystal phase, and the molar percentage of raw material components is as follows: ZnF2 25-35mol%, BaF2 10-20mol%, YF3 10-20mol%, SrF2 5-15mol%, AlF3 25-35mol%, and ErF3 0-10mol%. The application further discloses a preparation method of the fluorozinc-aluminum-based glass ceramic containing ZnF2 crystal phase, wherein the fluorozinc-aluminum-based glass ceramic containing ZnF2 crystal phase is obtained by using a melting quenching method to obtain a precursor fluorozinc-aluminum-based glass, and then is prepared by using a heat treatment method. The fluorozinc-aluminum-based glass ceramic containing single ZnF2 crystal phase has obvious up-conversion and mid-infrared light emission enhancement effect compared with the base glass, and can be applied to the fields of optical fiber / glass lighting display and high-power mid-infrared fiber laser.

This invention provides an amorphous vanadium-based cathode material, its preparation method, and its applications. The amorphous vanadium-based cathode material comprises active material glass powder, wherein the active material glass powder uses vanadium pentoxide as the active precursor, manganese dioxide as the structural stabilizer, sodium tetraborate decahydrate as the glass network former, lithium carbonate as the lithium source and network modifier, and thiourea as the reducing agent and nitrogen and sulfur doping source. The process employs melt quenching combined with thermoelectric coupling field crystallization, which is simple, low-cost, and suitable for large-scale production. Lithium-ion batteries assembled with this amorphous cathode material have advantages such as high specific capacity, excellent rate performance, and long cycle life.

Pr2Fe, a rare-earth permanent magnet material that can reduce the harm of residual carbon 14 A method for improving the phase stability of C relates to the field of permanent magnet materials technology. It consists of a substance with the following stoichiometric ratio: (Pr,RE)₂Fe 14 C; where RE = Sm, Gd; the preparation process includes batching, smelting, rapid melt quenching, and annealing. Rapid melt quenching is performed in a vacuum rapid quenching furnace with a copper roller speed of 20 ≤ V ≤ 40 m / s under a protective atmosphere. Annealing is performed in an annealing furnace at 500–1100°C under a protective atmosphere. In this invention, Sm₂Fe 14 C and Gd2Fe 14 The high stability of the C phase is achieved by replacing Pr₂Fe with Sm and Gd atoms. 14 Some Pr atoms in C extend Pr2Fe 14 In the stable region of the C phase, pure phase (Pr,RE)2Fe was prepared. 14 Type C rare earth permanent magnet material.

The application discloses a preparation method of a homogeneous titanium-palladium alloy and application of the titanium-palladium alloy, and the preparation method comprises the following steps: putting titanium sponge and palladium gold fragments into a vacuum induction melting furnace in a melt quenching device according to a mass ratio of 96-98:4-2, rapidly melting, and then rapidly quenching into a titanium-palladium intermediate alloy with a thickness of 40-60 microns and a width of 5-10 mm under the protection of argon; crushing the titanium-palladium intermediate alloy into titanium-palladium intermediate alloy fragments with the same particle size as the titanium sponge; taking the titanium sponge and the titanium-palladium intermediate alloy fragments according to a mass ratio of 8-9:2-1, and physically mixing uniformly; pressing the mixture into a billet, namely a titanium-palladium electrode; repeatedly melting the titanium-palladium electrode in a vacuum consumable electrode furnace to obtain a titanium-palladium alloy ingot; and homogenizing annealing the titanium-palladium alloy ingot in a vacuum annealing furnace, so that the titanium-palladium alloy is obtained. The application can accurately control the content and uniformity of the Pd element in the Ti-Pd alloy, and a homogeneous titanium-palladium alloy without segregation and metallurgical defects such as inclusions is prepared.