22results about How to "Low preparation temperature" patented technology

The invention belongs to the technical field of solid-state lithium metal batteries, and discloses an amorphous inorganic ion conductor and a preparation method and application thereof, and the preparation method comprises the following steps: uniformly mixing lithium tetrachloroaluminate and sodium tetrachloroaluminate to obtain a mixture; and melting the mixture to obtain a molten precursor, and cooling the molten precursor to room temperature to obtain the amorphous inorganic lithium ion conductor Li < x > Na < 1-x > AlCl4, x being greater than or equal to 0.15 and less than or equal to 0.85, wherein the amorphous inorganic lithium ion conductor Li < x > Na < 1-x > AlCl4 is used as an interface phase between a positive electrode of a solid-state lithium metal battery and a solid-state electrolyte. The amorphous LixNa1-xAlCl4 has the remarkable advantages that the preparation temperature is low, the crystal structure of the product can be controlled, the ionic conductivity of the product is high, and the compatibility with a solid electrolyte and a positive electrode material is good. The method is short in preparation period, low in cost and suitable for industrial application.

The invention provides a preparation method capable of preparing high-purity ZrC powder on a large scale and ZrC powder.The preparation method comprises the steps that firstly, zirconium metal salt, deionized water, organic ligands and absolute ethyl alcohol are subjected to ultrasonic mixing, and a metal salt solution and an organic solution are obtained; pouring the organic solution into the metal salt solution to form a mixed solution, and ultrasonically removing gas in the solution; dropwise adding a small amount of ammonia water into the mixed solution, shaking, performing ultrasonic treatment to enable the solution to be uniform, and standing for a period of time to obtain metal organic gel; centrifugally cleaning the gel, and drying the cleaned gel in a drying oven at a certain temperature to obtain dry gel powder; and finally, putting the dry gel powder into a graphite crucible, and carrying out high-temperature cracking in a vacuum carbon tube furnace to obtain the high-purity ZrC powder. Impurities are prevented from being introduced into a traditional ball milling process, the metal organic gel can achieve uniform combination of metal ions and organic ligand atoms, the ZrC powder is endowed with the excellent characteristics of 50-200 nm nanoscale size, high purity, uniform distribution, spherical morphology and the like, and meanwhile the preparation method is short in period, low in temperature, low in cost, environmentally friendly in raw material and suitable for industrial production. The method is easy to control and suitable for large-scale preparation.

The present invention provides a method for preparing SrZnV2O7 microwave dielectric ceramic powder in a short time, and belongs to the technical field of inorganic non-metallic material preparation. Sr(NO3)2, Zn(NO3)2·6H2O, NH4VO3 and glycine (C2H5NO2) are used as raw materials, and the raw materials are first dissolved in water respectively to form two solutions A and B. Then the two solutions are mixed, and a sol is prepared through continuous heating and stirring. Finally, the sol is dried and ground, and then calcined at a certain temperature to obtain SrZnV2O7 powder. The present invention can prepare high-purity powder under low temperature and short time conditions through specific raw material composition and preparation route, and the obtained powder particles are dispersed and evenly distributed, and have good application prospects.

A method for preparing a carbon fiber / SiHfBOC composite material with high temperature protection based on a silicon oxide-hafnium oxide composite oxide layer, the present invention relates to a method for preparing a carbon fiber / SiHfBOC composite material with high temperature protection based on a silicon oxide-hafnium oxide composite oxide layer, the present invention is to obtain a ceramic-based composite material resistant to high temperature oxidation and ablation, a three-dimensional woven T700-PAN fiber braid coated with a PyC coating is used as a load-bearing skeleton, and a SiHfBOC precursor ceramic is used as a matrix. The load-bearing skeleton and the ceramic matrix are compounded by a pressure-assisted precursor impregnation and cracking method. This process not only has a low preparation temperature and less damage to carbon fiber, but also can efficiently densify the composite material, and the composite material has a density of nearly 90%, which can effectively prevent the formation of oxygen channels in a high temperature ablation environment, and achieve better protection. The present invention is used in the technical field of oxidation-resistant ablation composite materials.

The invention discloses high-density Sn < 2 + >-doped silicon-boron-gadolinium scintillation glass as well as a preparation method and application thereof, and belongs to the field of scintillation luminescent materials. The high-density Sn < 2 + > doped silicon-boron-gadolinium scintillation glass comprises a main body component, a reducing agent and externally doped Sn < 2 + >, the main body components comprise SiO2, B2O3, Gd2O3, GdF3 and X, and the X is one or more of Al2O3, AlF3, BaO and BaF2; the molar percentages of SiO2, B2O3, Gd2O3, GdF3 and X are as follows: the molar percentage of SiO2 is 5 to 10 mol percent, the molar percentage of B2O3 is 15 to 30 mol percent, the molar percentage of Gd2O3 is 25 to 35 mol percent, the molar percentage of GdF3 is 25 to 35 mol percent, and the molar percentage of X is 5 to 15 mol percent; the sum of the main components is 100 mol%; the molar percentage of the reducing agent is 0.5-2 mol%; the molar percentage of the externally doped Sn < 2 + > is 0.5-2 mol%; the density of the high-density Sn < 2 + > doped silicon-boron-gadolinium scintillation glass is 6-6.26 g / cm < 3 >, the photoluminescence quantum efficiency is 75%-90%, the density, the photoluminescence quantum efficiency and the X-ray imaging resolution of the scintillation glass are greatly improved, and the preparation cost of the high-density scintillation glass is reduced.

The utility model relates to the field of ammonia water preparation, in particular to a novel ammonia water preparation device which comprises an ammonia water preparation kettle, a condenser, a pressure control system and a nitrogen inlet pipeline, the top of the ammonia water preparation kettle is communicated with a liquid ammonia feed pipe and a desalted water feed pipe, the bottom of the ammonia water preparation kettle is communicated with an ammonia water discharge pipe, the ammonia water discharge pipe is communicated with an ammonia water pump, the output end of the ammonia water pump is communicated with a condenser, and a return port of the condenser is communicated with the ammonia water preparation kettle; the top of the ammonia water preparation kettle is connected with a pressure control system; the pressure control system comprises a nitrogen inlet regulating valve, an exhaust regulating valve, a first switch valve, a second switch valve and a pressure remote meter arranged at the top of the ammonia water preparation kettle. The problems that the preparation temperature is too high and the preparation pressure is too high or too low are effectively solved. The preparation efficiency is improved; and the preparation pressure is adjustable.

The invention relates to the technical field of organic matter synthesis, in particular to polydithiodipropane sulfonate and a preparation method thereof. The preparation method comprises the following steps: mixing a thiourea source, propane sultone and a solvent at the temperature of 35-65 DEG C, and carrying out ring-opening reaction to prepare isothiourea propane sulfonic acid inner salt; the method comprises the following steps: mixing isothiourea propane sulfonic acid inner salt and an alkali metal hydroxide solution, and carrying out alkaline hydrolysis reaction at 40-100 DEG C to prepare alkali metal salt of 3-mercaptopropane sulfonic acid; the ratio of the mole number of alkali metal hydroxide contained in the alkali metal hydroxide solution to the mole number of the isothiourea propane sulfonic acid inner salt is (2.1-2.5): 1; the method comprises the following steps: adding an oxidizing agent into alkali metal salt of 3-mercaptopropane sulfonic acid, and carrying out oxidation reaction at 15-35 DEG C to prepare the polydithiodipropane sulfonate. The preparation method provided by the invention has the advantages of low preparation temperature, effective reduction of side reactions, safety, and high yield and purity.

The present invention provides a preparation method and application of a g‑C3N4 layer-coated silicon negative electrode material. The present invention uses silicon nanoparticles, silicon nanowires or porous silicon as raw materials, puts the silicon raw materials into urea solutions of different concentrations for ultrasonic oscillation, evaporates them in a water bath and then freeze-dries them; the silicon sample is placed in a tubular furnace, annealed at a certain heating rate under an inert atmosphere, and cooled to room temperature to obtain a g‑C3N4 layer-coated silicon composite negative electrode material. The g‑C3N4 coating layer can solve the problems of insufficient silicon conductivity and unstable solid electrolyte membranes. In addition, g‑C3N4 can be embedded in Li + After that, Li3N with high conductivity and high lithium ion transport is formed. Therefore, the g-C3N4 layer-coated silicon negative electrode material exhibits excellent electrochemical properties and has broad application prospects in lithium-ion batteries.

The application provides an amorphous iron nitride sulfide thin film positive electrode material, a preparation method thereof and a thin film lithium battery containing the same. The positive electrode material uses nitrogen atoms to replace part of sulfur atoms in amorphous ferrous sulfide to form amorphous iron nitride sulfide, and the atomic ratio of iron, sulfur and nitrogen in the iron nitride sulfide is 1:(0.3-0.6):(0.3-0.6). The amorphous structure of the iron nitride sulfide can avoid the volume expansion of the crystalline material caused by lattice distortion; and the presence of nitrogen atoms can effectively inhibit the shuttle effect of polysulfides generated in the cycle process, so that the positive electrode thin film can be more firm, the diffusion of the active material into the electrolyte can be avoided, and the capacity and cycle life of the battery can be improved. The preparation method is simple, and the obtained iron nitride sulfide positive electrode material has the advantages of good conductivity, fast growth speed, high specific capacity, long cycle life, low preparation temperature and the like.

The invention discloses a method for preparing potassium hexatitanate nanowhiskers by using waste salt, which comprises the following steps: (1) mixing the mixed waste salt of a herbicide cyhalofop-butyl synthesis byproduct with titanium dioxide, and grinding on a ball mill to obtain powder, the waste salt comprising potassium carbonate, potassium bicarbonate, potassium bromide, potassium fluoride and organic matter; the ratio of the sum of the mole number of potassium carbonate in the waste salt and the mole number of potassium in the potassium bicarbonate to the mole number of titanium dioxide is 1: (2.50-2.75); (2) heating the powder obtained in the step (1), and sintering to obtain a sintered body; (3) soaking and stirring the sintered body in clear water to obtain a slurry liquid, filtering to obtain a filter cake, and washing with water until the filtrate does not contain fluorine ions and bromine ions; drying is performed to obtain the potassium hexatitanate nano crystal whiskers; the potassium hexatitanate nanowhisker prepared by the method has high additional value and high length-diameter ratio, not only improves the use value of waste salt, but also simplifies the later separation process of potassium bromide and potassium fluoride serving as fluxing agents.

The invention discloses a rare earth Er low-temperature modified amorphous alumina hydrogen / deuterium / tritium resistant coating and a preparation method thereof. The coating comprises a metal substrate and an Er low-temperature modified amorphous alumina coating covering the metal substrate. The preparation method comprises the following steps: pre-treating the metal substrate; preparing Er modified amorphous alumina sol containing an aluminum source and erbium salt through a sol-gel process; a coating prefabricated layer is formed on a substrate through a coating technology, organic matter is removed through low-temperature heat treatment, and the coating is obtained. According to the coating, Er-O bonds and interface hydrogen blocking traps are formed through solid solution and nanocrystalline precipitation of Er in an amorphous aluminum oxide network, and the barrier property is remarkably improved. Experiments show that when the Er modification proportion is 10%, the deuterium permeation barrier factor PRF of the coating reaches 2407, and the permeability of the coating is reduced by about three orders of magnitude compared with that of a stainless steel matrix. The method is simple in process, low in preparation temperature, excellent in hydrogen resistance and suitable for the fields of nuclear energy, hydrogen energy and the like.

The invention belongs to the technical field of organic synthesis, and particularly relates to a preparation method of 3, 5-dichloro-2-aminobenzoyl isopropylamine, o-nitrobenzoic acid is taken as an initial raw material, 80% hydrazine hydrate is dropwise added, a catalyst prepared in advance is matched, o-aminobenzoic acid is prepared, then the o-aminobenzoic acid is dissolved in dichloroethane to react with sulfuryl chloride, and 3, 5-dichloro-2-aminobenzoyl isopropylamine is prepared. The preparation method comprises the following steps: reacting 3, 5-dichloro-2-aminobenzoic acid with triphosgene under an alkaline condition to generate 3, 5-dichloro-2-aminobenzoyl chloride, and reacting the 3, 5-dichloro-2-aminobenzoyl chloride with isopropanolamine to obtain the final product 3, 5-dichloro-2-aminobenzoyl isopropylamine. By reasonably controlling the raw material ratio and reaction conditions in each step, the reaction in each step is sufficient, the obtained 3, 5-dichloro-2-aminobenzoyl isopropylamine is high in purity and yield, the used raw materials are cheap and easy to obtain, the requirements on production equipment are low, the process conditions are simple, the labor and energy consumption are greatly reduced and saved, the cost is low, and industrial production is easy.

This invention discloses a high-performance wrought magnesium-lithium alloy, comprising the following components by mass percentage: Li 4.8%~5.3%, Zn 5.7%~6.2%, Y 1.8%~2.3%, with the balance being Mg. The alloy is prepared as follows: 1. Raw materials of each component are taken according to the mass percentage of the target magnesium-lithium alloy, and smelted and cast to obtain a magnesium-lithium alloy ingot; 2. The magnesium-lithium alloy ingot is subjected to homogenization heat treatment; 3. After low-temperature preheating, it is subjected to low-temperature extrusion and cooled to room temperature. The magnesium-lithium alloy of this invention, by adding Zn and Y elements, introduces a network W phase, MgZn phase, and MgY phase as reinforcing phases to strengthen the alloy. Combined with the homogenization heat treatment followed by low-temperature extrusion deformation in the preparation process, cold forming capability is increased, and the second phase is effectively broken up, synergistically improving the strength and plastic mechanical properties of the magnesium-lithium alloy, making it suitable for aerospace and other fields.

The invention discloses Tb < 3 + >-doped oxyfluoride magneto-optic glass as well as a preparation method and application thereof, and belongs to the field of magneto-optic materials. The Tb < 3 + >-doped oxyfluoride magneto-optic glass comprises main body components and the following main body components in mole percent: 25 to 55 mol percent of B2O3, 0 to 5 mol percent of SiO2, 15 to 30 mol percent of Tb2O3 and 20 to 50 mol percent of TbF3, wherein the sum of the main body components is 100 mol percent; the preparation method comprises the following steps: weighing raw materials, melting in a reducing atmosphere, cooling and molding, and annealing; according to the prepared Tb < 3 + >-doped oxyfluoride magneto-optic glass, the Verdet constant and the transmittance are greatly improved, and the preparation cost of the magneto-optic glass is reduced; and the requirements of laser application, an optical isolator, a magnetic field and an electric field sensor can be better met.

The invention discloses a perovskite solar cell adopting a low-melting-point alloy back electrode and a preparation method of the perovskite solar cell. The perovskite solar cell comprises a transparent conductive substrate, a carrier transport layer 1, a perovskite light absorption layer, a carrier transport layer 2 and a low-melting-point alloy back electrode which are laminated in sequence, the preparation method of the low-melting-point alloy back electrode specifically comprises the steps that S1, low-melting-point alloy foil is flatly laid on the carrier transport layer 2; s2, certain pressure is applied to the alloy foil through a pressure mold; and S3, heating to enable the alloy back electrode to be attached to the carrier transport layer 2, and cooling to obtain the perovskite solar cell. The hot-pressing method for preparing the low-melting-point alloy back electrode is low in material cost, simple and rapid in process and free of vacuum and high-temperature conditions. The prepared perovskite solar cell is high in efficiency, good in stability and repeatability, simple in process, low in cost and suitable for large-scale production.

The invention belongs to the technical field of lithium ion battery materials, and relates to a salt-assisted inner and outer double-layer carbon-coated silicon material, a preparation method and application thereof, and the preparation method comprises the following steps: S1, preparing a single-layer carbon inner-coated silicon material C (at) Si; s2, filling pores with inorganic salt; s3, preparing an outer carbon coating layer; s4, carrying out pre-carbonization in an inert atmosphere; s5, washing in an aqueous solution, and drying; and S6, performing high-temperature carbonization in an inert atmosphere to obtain the salt-assisted inner and outer double-layer carbon-coated silicon material C (at) Si (at) C. The silicon material with a special core-shell structure prepared in a salt-assisted inner and outer double-layer carbon coating mode is used as a lithium ion battery negative electrode material, the electrochemical performance of the material can be improved, and the conductivity, the chemical stability and the safety are improved; and the preparation method is simple, the process is short, the preparation temperature is low, the potential safety hazard in the preparation process is low, the raw materials are cheap and easy to obtain, and the production cost can be saved.

The invention belongs to the technical field of high radioactive waste treatment, and relates to a high-entropy ferrite rare earth based perovskite ceramic solidified body and a preparation method and application thereof.The general formula of the solidified body is A1 / n (FexBy) O3, n represents the number of element types of the A lattice site of the high-entropy A1 / n (FexBy) O3 ferrite rare earth based perovskite ceramic solidified body, n is an integer and is larger than or equal to 3 and smaller than or equal to 7, and the A element types include Bi, Sc, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Y, Ho, Er, Tm, Yb and Lu; m is at least three of transition metal elements including Cr, Mn, Co, Ni, Al, Ti, Zr, Hf, Nb, Ta and Ce, x is equal to 0.01 to 1.00, and x is equal to 0 to 0.99. According to the method, a high-entropy strategy is introduced into the ferrite rare earth perovskite ceramic solidified body, the ceramic solidified body not only can solidify various key high-radionuclides, but also has excellent chemical stability, low leaching rate and low preparation temperature, and the disadvantage that ceramic solidified nuclides are high in selectivity and single is effectively avoided. Due to the excellent performance of the ceramic solidified body, the ceramic solidified body has great application potential in the field of solidification treatment of high-radioactivity nuclear waste of a spent fuel reprocessing plant.

The invention discloses a packaging device for a high-power LED fishing lamp, and relates to the technical field of semiconductor lighting. The device comprises a heat dissipation substrate, an LED module, a first connecting layer, fluorescent ceramic, a second connecting layer and a lens which are sequentially arranged. The heat dissipation substrate is used as a heat dissipation medium for heat dissipation of the packaging device; the LED module is a blue light emitting source; the fluorescent ceramic is a fluorescence emission source; the lens is used for light source shaping; the LED module is connected with the fluorescent ceramic through a first connecting layer, and the fluorescent ceramic is connected with the lens through a second connecting layer. The large-size sapphire lens is innovatively adopted for heat dissipation of the fluorescent ceramic, and the heat effect under high-power excitation is greatly relieved; meanwhile, the fluorescent ceramic and the LED module are packaged by adopting the low-melting-point glass powder, the connection performance is good, heat can be transferred to the LED module from the fluorescent ceramic in the heat transfer process, and the working temperature of the fluorescent ceramic is further reduced.

The invention provides a method for seamlessly filling a silicon oxide groove, and belongs to the field of semiconductor industry and semiconductor process. According to the invention, in the same PECVD chamber, silicon nitride is used for deposition and etching at the same time, and seamless filling is carried out on a silicon oxide groove with the width of 20-100 nanometers and the depth of 40-60 nanometers. Deposition and etching are simultaneously carried out in situ, time cost can be saved, interface quality reduction caused by contact between an open cavity and air is avoided, and operation is simple. In addition, the technology mode can overcome the defect that the PECVD step covering capacity is general, and seamless filling of the small-size groove is achieved.

The invention relates to a preparation method of an in-situ carbon-doped cobalt-based catalyst, which comprises the following steps: mixing a metal source and an organic ligand to obtain a solid mixture, dissolving the solid mixture in a mixed solvent to obtain a mixed solution, the mixed solvent is composed of deionized water, ethanol and N, N-dimethylformamide; preparing an organic metal framework precursor from the mixed solution at 70-90 DEG C through a hydrothermal method; and calcining the organic metal framework precursor at 800-1000 DEG C, and naturally cooling to obtain the in-situ carbon-doped cobalt-based catalyst. The invention further relates to the in-situ carbon-doped cobalt-based catalyst and application thereof. The preparation method is simple, organic matter introduced by the organic ligand is calcined into carbon, and the carbon is doped into the cobalt-based material in situ, so that the problem of poor conductivity is solved.

The invention provides a graphene field effect transistor based on a spin-coated insulating medium and a preparation method thereof, and the transistor comprises a substrate, a gate electrode, a gate medium layer, a first insulating layer, a second insulating layer, a source electrode, a drain electrode, and a graphene channel layer. Gate dielectric layers with the same height as a gate electrode are formed at the two ends of a gate electrode in the buried gate structure through a spin-coating insulating medium technology, so that the smoothness of subsequent processing is ensured, and an insulating dielectric layer with the same height as a source electrode and a drain electrode is formed through the spin-coating insulating medium technology and etching; when the graphene thin film is transferred to the processed substrate, the stress borne by the graphene thin film is greatly reduced, so that the damage to the graphene thin film is reduced, the contact area of the graphene and the substrate is reduced by the nano-sized grooves in the insulating layer, the influence of substrate scattering is reduced, the carrier mobility of the graphene is improved, and the performance of the device is improved.

The invention discloses a high-strength and high-durability non-stick wheel emulsified asphalt tack coat oil and a preparation method thereof. The raw material components of the high-strength and high-durability non-stick wheel emulsified asphalt tack coat oil include: 28-32 parts of 0# asphalt, 68-72 parts of 70# asphalt and 78-85 parts of soap solution, wherein the parts are by mass; wherein the soap solution is prepared from an emulsifier, an interface agent and water in a mass ratio of 3:(6-8):(44-46), and the pH value of the soap solution is adjusted to 2±0.2 by hydrochloric acid; the interface agent is an acrylic emulsion; and the preparation method of the emulsifier is as follows: maleic rosin and epoxidized soybean oil are subjected to a ring-opening reaction under the action of a catalyst to obtain an intermediate product, and then the intermediate product is esterified with polyethylene glycol to obtain the emulsifier. The present invention effectively improves the surface state while stabilizing the dispersion by selecting asphalt and combining it with an emulsifier and an interface agent with a specific structure. It also promotes the improvement of strength, stability and durability, and significantly improves the non-stick wheel effect, thereby reducing or avoiding the impact on the road paving quality due to the shedding of the sticky layer oil.