18 results about "Calcium hydride" patented technology

The invention provides a core-shell quantum dot preparation method, which comprises: S1, mixing a quantum dot core-containing dispersion liquid, a first ligand, an additive, an etching agent and a first non-coordination solvent in a container, and carrying out a reaction for a certain time at a temperature of 150-200 DEG C to obtain an intermediate product system containing a surface-etched quantum dot core; the additive is selected from at least one of metal zinc, metal magnesium, sodium hydride, calcium hydride, potassium hydride, lithium aluminum hydride, sodium borohydride, a molecular sieve, calcium chloride, magnesium sulfate and sodium sulfate; s2, raising the temperature of the intermediate product system to a first temperature, adding an anion precursor and a zinc precursor into the container, and reacting for a certain time to obtain core-shell quantum dots; the anion precursor comprises at least one of a selenium precursor and a sulfur precursor; wherein the first temperature is selected from 250-340 DEG C. According to the preparation method, the size uniformity of the core-shell quantum dot after the shell layer is coated is better, so that the fluorescence half-peak width is narrowed.

The invention discloses an efficient environment-friendly hydrogen generation device based on calcium hydride oxidation-reduction reaction, and belongs to the technical field of hydrogen production, the efficient environment-friendly hydrogen generation device comprises an upper bottle body and a lower bottle body which can rotate relatively, a hydrogen guide pipe is arranged on the top surface of the upper bottle body, and an inflation valve and a pressure gauge are arranged on the hydrogen guide pipe; a balloon connector used for being connected with a balloon is arranged at the top of the hydrogen guide pipe, a detachable sealing cover is arranged at the bottom of the lower bottle body, a containing frame used for containing reactants is arranged on the sealing cover, a water bag is arranged on the upper portion of the containing frame, a puncturing mechanism is arranged in the upper bottle body, and a protection mechanism is arranged at the joint of the upper bottle body and the lower bottle body. Through the integrated design, the device is small in size, light in weight and high in safety, the requirements of unmanned sounding on the sea are met in the aspects of cost, weight and safety, and environment-friendly treatment is easy and convenient.

The invention provides a method for deeply removing oxygen in titanium system powder, which comprises the following steps: mixing titanium system powder to be deoxidized, a deoxidizing agent and an electron transfer agent, and carrying out deoxidation reaction to obtain a deoxidized material; the deoxidizing agent is a calcium deoxidizing agent or a sodium deoxidizing agent, the calcium deoxidizing agent is metal calcium and / or calcium hydride, the sodium deoxidizing agent is metal sodium and / or sodium hydride, and the electron transfer agent is anhydrous magnesium chloride; or the deoxidizing agent is a potassium deoxidizing agent or a barium deoxidizing agent, the potassium deoxidizing agent is metal potassium and / or potassium hydride, the barium deoxidizing agent is metal barium and / or barium hydride, and the electron transfer agent is anhydrous magnesium chloride and / or anhydrous calcium chloride. According to the method, deep removal of oxygen in the titanium-series powder can be achieved, the obtained deoxidized material is subjected to acid pickling or water washing and then acid pickling, and the deoxidized titanium-series powder can be directly obtained.

The present disclosure relates to a magnetic powder, a precursor for a magnetic powder, and a method for manufacturing the powder and the precursor powder. The method comprises the steps of combining a rare earth metal salt with a base metal powder and calcium hydride to form a magnetic powder precursor; pressing the magnetic powder precursor to form a pressed magnetic precursor body; heating the pressed magnetic precursor body to a reaction temperature and under an inert gas or vacuum to reduce the rare earth metal salt to a rare earth metal and form an intermediate product comprising calcium hydroxide and a magnetic powder; and, separating the calcium hydroxide from the intermediate product to form a rare earth magnetic fine powder.

The invention belongs to the technical field of material synthesis, and particularly relates to calcium dodecahydrododecaborate as well as a synthesis method and application thereof. According to the synthesis method of calcium dodecahydrododecaborate provided by the invention, calcium hydride CaH2, a borane dimethyl sulfide complex and an ether mixed organic solvent react in a reaction kettle to obtain a product, and monoethylene glycol dimethyl ether and tetrahydrofuran cyclic ether are compounded to obtain the ether mixed organic solvent; according to the method, the yield and purity of the product calcium dodecahydrododecaborate are improved, meanwhile, deionized water is used for carrying out solvent exchange on the product and drying is carried out, the purity of the product calcium dodecahydrododecaborate is further improved, efficient synthesis of calcium dodecahydrododecaborate is achieved, industrial preparation is facilitated, high-purity calcium dodecahydrododecaborate is provided, and the method is suitable for industrial production. The method is expected to meet the requirement of solid electrolyte battery commercialization on electrolyte, and solves the technical problem of lack of an efficient synthesis process of calcium dodecahydrododecaborate at present.

The invention belongs to the technical field of biological medicine, and discloses a cerium dioxide multifunctional nano material for tissue damage repair as well as a preparation method and application of the cerium dioxide multifunctional nano material. The cerium dioxide multifunctional nano-material comprises mesoporous cerium dioxide nano-particles, calcium hydride is loaded in the mesoporous cerium dioxide nano-particles, and the outer surfaces of the mesoporous cerium dioxide nano-particles are coated with polydopamine layers. The preparation method comprises the following steps: mixing a cerium source with a mesoporous template, and carrying out evaporation-induced self-assembly, steam-assisted crystallization, high-temperature calcination reinforcement and vacuum drying to generate mesoporous cerium dioxide; then calcium hydride is loaded in a pore channel of the mesoporous cerium dioxide; and the dopamine monomer is oxidized and self-polymerized on the surface of the calcium hydride-loaded mesoporous cerium dioxide. The material has good stability and cytocompatibility, can promote regeneration and repair of damaged tissues by continuously and slowly releasing hydrogen and regulating abnormal lipid metabolism, and is especially suitable for tissue regeneration and functional recovery of diseases such as osteoarthritis.

The application provides a plant fertilizer additive and a solid mixed hydrogen fertilizer and a preparation method. The plant fertilizer additive comprises magnesium hydride, calcium hydride and diatomite, wherein the magnesium hydride is a main agent, the calcium hydride is a first auxiliary agent, and the diatomite is a second auxiliary agent. According to the technical scheme, hydrogen fertilizer can be stably provided for plants, the cost is low, the preparation method is safe, and the fertilizer has good stability.

The invention belongs to hydrogenation-rich modified materials, and particularly relates to a hydrogenation-rich modified material as well as a preparation method and a use process thereof. The catalyst is prepared from the following raw materials in parts by weight: 10-60 parts of polyethylene glycol and 40-90 parts of a hydrogen source, the hydrogen source is one or a combination of more of calcium hydride, magnesium hydride, calcium magnesium hydride, elemental calcium and calcium magnesium alloy, or platinum-loaded titanium dioxide. The hydrogenation-rich modified material can modify an additive, the preparation method is convenient to operate, the use mode is simple and efficient, the utilization rate is high, the hydrogenation-rich modified material can be applied to the fields of medicine, food and cosmetics, the use conditions of inherent food additives, cosmetic additives and the like are not affected, and the modified additive can produce hydrogen after being used in oral administration, smearing and other modes; the product is easy to absorb, has no irritation to intestinal tracts, has no chemical residues influencing human health, and has strong practicability.

Rare earth material and methods for the production of rare earth materials, wherein the method for the production of a rare earth magnetic material of the form ReFeB comprises the steps of: combining a rare earth borate powder (ReBOg). iron powder and calcium hydride to form a precursor powder; compacting the precursor powder under a compaction pressure; and heating the compacted precursor powder body, the method for the production of a rare earth magnetic material of the form ReFeB comprises the steps of: combining a rare earth boride powder (ReB) and iron powder to form a precursor powder; compacting the precursor powder; and heating the compacted precursor powder body, and the method for the production of a rare earth nitride material (ReN) comprises the steps of: combining a rare earth borate powder (ReBOg) with calcium hydride to form a precursor powder; introducing nitrogen into the precursor powder; compacting the nitrogen-rich precursor powder; and heating the compacted precursor powder block..

The invention relates to the technical field of metal beryllium manufacturing, in particular to a preparation method of high-purity metal beryllium with beryllium oxide as a raw material. According to the preparation method of the high-purity metal beryllium with the beryllium oxide as the raw material, a compound of calcium hydride, silicon carbide and aluminum oxide serves as a reducing agent, the 2N-level high-purity metal beryllium is prepared through reaction at the temperature of 1300-1500 DEG C, and the yield is 75% or above. The industrial production potential is realized. According to the invention, beryllium fluoride is not used as a raw material any more, and a novel metal beryllium preparation process is developed.

The application provides a porous carbon reinforced titanium-based hydrogen storage alloy composite material and a preparation method thereof. The porous carbon reinforced titanium-based hydrogen storage alloy composite material comprises the following components in parts by mass: 1-3 parts of SiO2 nanosphere templates, 1 part of sucrose, 0.01-0.05 parts of sulfuric acid, 1-2 parts of sodium hydroxide, 5-7 parts of titanium dioxide, 11-15 parts of ferrous sulfate heptahydrate, 2-4 parts of manganese nitrate hexahydrate, 0.5-1 part of lanthanum nitrate hexahydrate, 40-50 parts of calcium hydride and 40-50 parts of lithium chloride; wherein the SiO2 nanosphere templates have a pore diameter of 50-200 nm and a specific surface area of 50-200 m 2 / g. The porous carbon reinforced titanium-based hydrogen storage alloy composite material provided by the application improves the mass transfer and heat transfer efficiency of the material by setting the porous carbon structure, promotes the adsorption, dissociation and diffusion process of hydrogen molecules, improves the hydrogen storage kinetic performance, improves the cycle stability of the material, and improves the service life and comprehensive performance of the hydrogen storage material.

The invention belongs to the field of metal material plating, and particularly relates to a low-cost gas-phase aluminizing process capable of controlling the quality of an aluminized layer. Aiming at the problems of oxide pollution of a shell on the surface of a casting, insufficient process flexibility and the like, the invention provides the gas-phase aluminizing method which does not need equipment transformation, is low in cost and is controllable in aluminizing layer quality. An adopted aluminizing agent comprises a main aluminizing agent, an atmosphere regulator and a hydrogen generating agent; the main permeating agent comprises aluminum iron powder and an activating agent, and the activating agent comprises ammonium chloride, ammonium bifluoride or a mixture of the ammonium chloride and the ammonium bifluoride; the atmosphere regulator is aluminum chloride; the hydrogen generating agent comprises calcium hydride, lithium aluminum hydride and magnesium hydride. And aluminizing is conducted in an inert atmosphere, the temperature is increased to 200-450 DEG C and kept for 1-2 h, then the temperature is increased to 800-900 DEG C and kept for 2 h, then the temperature is continuously increased to 900-1100 DEG C and kept for 1-6 h, and an aluminized layer is obtained on the surface of the part. And by adjusting the temperature and the time, the thickness of the aluminized layer is accurately controlled to be 18-65 microns, and the aluminum content in the aluminized layer is 23-32%.

The invention discloses a method for rapidly synthesizing calcium hydride powder at high temperature, and belongs to the technical field of calcium hydride synthesis. The method comprises the following steps: S1, spreading a high-purity calcium powder layer on a substrate of a reaction chamber under the protection of an inert atmosphere, and then vacuumizing the reaction chamber; s2, introducing hydrogen into the reaction chamber, and exciting the hydrogen by using microwaves to generate hydrogen plasmas; the high-purity calcium powder layer is heated to the temperature range from (Tm-delta T) to Tm, Tm is the melting point of calcium, and delta T ranges from 10 DEG C to 50 DEG C; s3, the high-purity calcium powder layer in the temperature range and high-activity hydrogen particles in the hydrogen plasma are subjected to a gas-phase hydrogenation reaction, and calcium hydride is generated; and S4, condensing and depositing calcium hydride generated by the reaction to obtain calcium hydride powder. Compared with a traditional synthesis method for several hours, the synthesis time of the synthesized calcium hydride is greatly shortened, the conversion rate is close to 100%, and the calcium hydride has high intrinsic activity.

The invention discloses a transition metal element doped titanium sesquioxide material and a preparation method and application thereof, and belongs to the field of oxide material preparation. According to the invention, a low-temperature water bath method and a traditional impregnation method are combined to prepare rutile type titanium dioxide rhombic nanoparticles doped with transition metal elements, and then the transition metal element doped titanium sesquioxide material is prepared by adding calcium hydride and carrying out vacuum annealing. By continuously exploring experimental conditions, the rhombic titanium sesquioxide nanoparticles doped with different transition metal elements are successfully prepared. The method is simple, the preparation cost is low, the equipment requirement is low, and the prepared doped titanium sesquioxide particles have good morphology and certain dispersity. In a reaction for synthesizing hydrogen peroxide through electro-catalytic oxygen reduction, the nickel-doped titanium sesquioxide can obtain selectivity as high as 96.6%.

The application provides a method for removing calcium in a rare earth permanent magnet alloy and application thereof. The rare earth permanent magnet alloy contains one or more of calcium oxide, calcium hydride and metallic calcium. The method comprises the following steps: performing a first mixing process on the rare earth permanent magnet alloy and water to obtain a rare earth permanent magnet alloy containing calcium hydroxide; performing a second mixing process on the rare earth permanent magnet alloy containing calcium hydroxide and a resin emulsion to obtain a mixed solution of agglomerated particles containing calcium hydroxide and the rare earth permanent magnet alloy, wherein the resin emulsion comprises a base resin, an anionic surfactant and water, and the base resin is selected from vinyl acetate resin and / or polyacrylate; and separating the rare earth permanent magnet alloy from the mixed solution under the action of a magnetic field. The method can remove calcium in the rare earth permanent magnet alloy, and is particularly suitable for removing calcium in a rare earth permanent magnet alloy prepared by a reduction diffusion method.

The invention relates to the technical field of metal preparation, and discloses a preparation method of high-purity metal thorium, which comprises the following steps: S1, stirring and mixing thorium dioxide powder and calcium hydride powder; s2, placing the uniformly mixed material in a vacuum or argon environment for calcium thermal reduction reaction, and obtaining a sintered product after the calcium thermal reduction reaction is finished; and S3, after the sintered product is naturally cooled, the sintered product is washed and dried, and metal thorium powder is obtained. The method has the following technical effects that calcium hydride is adopted as a reducing agent for calcium thermal reduction of thorium dioxide, the requirement for the purity of calcium hydride is low, and pretreatment is not needed; the thorium dioxide powder and the calcium hydride powder are similar in granularity, so that the mixing uniformity of the thorium dioxide powder and the calcium hydride powder can be improved, the reaction is more sufficient, the reaction efficiency is high, and the reaction product purity is high; thorium dioxide and calcium hydride can generate a large amount of gas in the calcium thermal reduction reaction process, so that a sintering product has a large amount of air holes, and the caking degree of the sintering product is reduced.

The invention relates to the technical field of metal beryllium manufacturing, in particular to a method for preparing metal beryllium by taking beryllium oxide as a raw material and improving the yield. According to the preparation method of the high-purity metal beryllium with the beryllium oxide as the raw material, calcium hydride, silicon carbide and calcium-magnesium alloy serve as compound reducing agents, calcium fluoride and aluminum oxide serve as compound fluxing agents, the metal beryllium is prepared through a reaction at the temperature of 1300-1400 DEG C, then the beryllium phase and the slag phase are rapidly separated through the melting centrifugal technology, the separation efficiency is high, and the purity is high. And the direct yield of the metal beryllium is obviously improved.

The utility model relates to organic solvent water removal equipment technical field discloses a kind of organic solvent water removal device, including filter barrel, filter barrel is equipped with filter device, filter device is sequentially from top to bottom molecular filter box, chemical filter box and impurity filter box, and filter device is sequentially communicated by conveying pipe, molecular filter box is equipped with molecular sieve, molecular sieve can filter free water in electrolyte, chemical filter box is equipped with calcium hydride, calcium hydride can react with water molecule attached on hydrogen bond, impurity filter box is equipped with filter plate, filter plate can intercept the impurity generated in chemical filter box;The device is through the multistage design of "physical adsorption+chemical reaction+impurity fine filter", systematically solves the problem of hydrogen bond combined water removal deficiency of traditional method, has remarkable advantage in water removal efficiency, electrolyte purity guarantee and the like.