36results about How to "Good crystal morphology" patented technology

The invention relates to a process for recovering zinc from hot-dip coating zinc ash. The process comprises the following steps of: separating the hot-dip coating zinc ash after dry grinding and screening to obtain an oversize product and an undersize product; removing bound water and a small amount of zinc chloride from the oversize product under the condition that the temperature is between 400 and 500 DEG C and the vacuum degree is 10 to 50 Pa; performing vacuum distillation on the oversize product under the condition that the temperature is between 650 and 800 DEG C and the vacuum degree is 10 to 30 Pa to obtain zinc; and performing alkali cleaning on the undersize product to remove chlorine, and then performing vacuum thermal reduction on the undersize product to obtain the zinc from zinc oxide by using ferrosilicon as a reducing agent and calcium oxide as a slagging agent under the condition that the vacuum degree is 10 to 30 Pa and the temperature is between 1,050 and 1,200 DEG C. The process has a high recovery rate for recovering the zinc from the hot-dip coating zinc ash, and the obtained zinc has a good crystallized shape.

The invention provides a high-temperature-resistant and high-humidity-resistant fluoride red fluorescent powder and a preparation method thereof. The fluorescent powder has a general chemical formula of KmAnM1-xF6: xMn<4+>. In the general chemical formula, A is one or two selected from the group consisting of Cu, Ba and Zn; M is at least one selected from the group consisting of Ti, Si and Ge; m + 2n are equal to 2; n is no less than 0.05 and no more than 0.2; m is no less than 1.6 and no more than 1.9; x is more than 0 and less than 0.2; and the surface of the fluorescent powder is coated with a mixture of potassium silicate, carboxymethyl cellulose sodium and polyethylene glycol. The fluorescent powder provided by the invention can be effectively excited by light with the excitation wavelength being in a range of 300 to 500 nm, so red light with a peak wavelength of 610 to 650 nm and a half-peak breadth of only 2 to 9 nm is generated, and high color purity is obtained. The preparation method provided by the invention has simple flow, can prepare target products at low temperature and under normal pressure, and facilitates to large-scale industrial production; and a special coating technology is adopted in the invention, and a coating reagent is utilized to change the surface state of fluorescent powder particles, so the problem of agglomeration of solid particles can be effectively solved, and a fluorescent powder product with good dispersion properties and high-temperature-resistant and high-humidity-resistant performances can be obtained.

The invention discloses a preparation method of M-site doped vanadium MXene. The preparation method comprises the following steps: mixing metal powder, aluminum powder, carbon powder and fused salt according to a certain proportion to prepare powder; then putting the powder into a mortar, adding a grinding fluid, and grinding for 3-8 minutes under an air condition so that the powder is primarily mixed; transferring into a ball milling tank and carrying out ball milling for 3-6 hours to obtain powder; then putting the powder into a magnetic boat for high-temperature atmosphere sintering to obtain M-site doped MAX-phase powder; and mixing the M-site doped MAX-phase powder with an etching agent according to a certain ratio, then magnetically stirring at 20-35 DEG C for 12-36 hours, cleaning,centrifugally separating and drying to obtain M-site doped V2CTxMXene. The MXene powder material prepared by the method has the characteristics of high purity, multiple hybrid sites and the like, canbe subjected to structure fine adjustment according to working condition requirements, and has a wide application prospect in the field of electrochemistry.

The invention discloses a method for regulating the crystal growth of a perovskite layer. A modified layer is prepared on the surface of an anode interface layer, and then a perovskite layer is prepared on the surface of the modified layer. The modified layer is one or more in a group consisting of 2, 2' -bipyridine, 4, 4'-bipyridine, 1,10-phenanthroline and ethylenediamine tetraacetic acid. The method is easy to combine with the methods of introducing additives, mixing a solvent system and using an anti-solvent, a uniform film with a high coverage rate can be effectively obtained, the furtherimprovement of the efficiency of an inverted perovskite solar cell is helped, and the method has great significance to promote the commercialization process of perovskite solar cells.

The invention discloses a method for preparing multi-stage pore SAPO-34 molecular sieve by mixing tetrahydrofuran with organic amine as a template agent. Firstly, the tetrahydrofuran and the organic amine are mixed as the mixed template agent, the template agent is added into deionized water and stirred sufficiently to form a mixed solution, then a silicon source and an aluminum source are sequentially added into the mixed solution and stirred for a while to form a homogeneous mixture, phosphoric acid is added dropwisely and stirred continuously until a uniform gel mixture is formed, the gel mixture is transferred to an autoclave, crystallized at a certain temperature for a while and then cooled at room temperature after completion of crystallization, and the solid phase product is washedwith deionized water, dried and then calcined at 580 DEG C in the air to obtain the SAPO-34 molecular sieve. The synthesized SAPO-34 molecular sieve is of a multi-stage pore structure, and has good crystal morphology, high solid phase yield and great significance for industrial application of the SAPO-34 molecular sieve.

The invention provides a positive electrode material and a preparation method and application thereof. The chemical formula of the positive electrode material is LixMnyO2, x/y is greater than or equal to 0.9 and less than or equal to 1.6, x is greater than 0, and y is greater than 0. The preparation method comprises the following steps of (1) mixing a fused salt, a manganese salt and a first lithium salt, and carrying out primary sintering to obtain a base material, and (2) mixing the base material obtained in the step (1) with a second lithium salt, and carrying out secondary sintering to obtain the positive electrode material. In the step (2), the molar ratio of all the lithium elements to all the manganese elements is 0.9-1.6. The positive electrode material provided by the invention is free of cobalt and nickel, the cost is greatly reduced, relatively high capacity can still be maintained, and meanwhile, a molten salt heating method is adopted, so that the production efficiency is further improved on the basis of further reducing the cost.

The invention discloses a preparation method and application of cubic molybdenum nitride, and belongs to the field of lithium ion battery electrode materials. The preparation method comprises the following steps: S1, mixing an ethanol solution of urea, an ethanol solution of melamine and an ethanol solution of ammonium molybdate tetrahydrate, and stirring to obtain a mixed solution, wherein the mass ratio of ammonium molybdate tetrahydrate to urea to melamine in the mixed solution is (5-11): 100: (3-6); S2, aging the mixed solution at room temperature to form sol/gel, and freeze-drying to form a solid; S3, pre-sintering the obtained solid, and then carrying out heat treatment to obtain precursor powder; and S4, roasting the obtained precursor powder in a nitrogen atmosphere, and cooling to room temperature to obtain the molybdenum nitride electrode material. The nanoscale molybdenum nitride powder product is obtained through a simple process, has a cubic structure, is small in grain size and uniform in granularity, and has excellent cycle performance and relatively high specific capacity when being used as a lithium ion battery negative electrode material.

The invention discloses a preparation method of a high dispersion barium sulfate composite material for a plastic masterbatch. The preparation method comprises the following steps: a, impregnating barium sulfate by using a low-concentration titanium sulfate solution; b, mixing the impregnated barium sulfate, a dispersing agent with a urea solution and stirring, dropwise adding a high-concentrationtitanium sulfate solution and reacting to prepare nano-BaSO4/TiO2 composite powder; c, carrying out ball milling on the composite powder, decontaminated water and carboxylic polybutadiene to obtain slurry; d, carrying out filter pressing and drying on the slurry to obtain a composite material coating BaSO4/TiO2 with the carboxylic polybutadiene. According to the preparation method of the high dispersion barium sulfate composite material for the plastic masterbatch, disclosed by the invention, by utilizing good dispersion and weathering resistance of nanotitanium dioxide, the prepared BaSO4/TiO2 composite powder has the advantages of smaller particle size, uniform particle size distribution and excellent anti-ultraviolet ability; the dispersion of the composite material in non-polar solvents is effectively improved; the prepared composite material has good dispersion and crystal appearance morphology, as well as good dispersion and processing property when being used in the plastic masterbatch.

The invention discloses a method for decomposing a phosphate rock acidolysis liquid by nitric acid to remove calcium byproduct alpha high-strength gypsum. The method comprises: decomposing phosphoriteby nitric acid, filtering out acid insoluble substances, partially neutralizing the acidolysis liquid, regulating and controlling the concentration of calcium ions in the acidolysis liquid, adding the acidolysis liquid into a crystallization tank containing a mixed solution of additional phosphoric acid and ammonium sulfate, controlling the reaction temperature to be 50-70 DEG C and the reactiontime to be 0.5-2 hours to firstly generate dihydrate gypsum, then, making the reaction slurry flow into a crystal transformation tank, and raising the temperature to 95 to 110 DEG C for reacting for aperiod of time so that an alpha-type high-strength gypsum product can be produced as a byproduct. According to the invention, the acidolysis liquid can be used for producing products such as fine phosphate, high-water-solubility phosphate fertilizer and the like, meanwhile, calcium resources in the acidolysis liquid are converted into an alpha high-strength gypsum product, solid waste phosphogypsum is changed into product phosphogypsum, environmental risks caused by the fact that a large amount of solid waste phosphogypsum is produced as a byproduct in the ammonium phosphate industry are eliminated, the phosphorus compound fertilizer industry is promoted to adjust the product structure, solid waste emission is reduced, and sustainable development of the phosphorus chemical industry is promoted.

The invention relates to titanium nitride powder based on a low temperature liquid polymerization process and a preparation method of the titanium nitride powder. According to the technical scheme, the method comprises the following steps: mixing metal magnesium powder, alkali metal inorganic salts and titanium dioxide powder according to a molar ratio of 1:(1.5-2.0):(0.25-0.50); or mixing metal magnesium powder, alkali metal inorganic salts and sodium titanate powder according to a molar ratio of 1:(1.5-2.0):(0.06-0.08); respectively maintaining the temperature of respectively mixed powder for 2-6 hours in a nitrogen atmosphere and under the condition of 900-1300 DEG C, and naturally cooling; adding the fired product into a hydrochloric acid solution for soaking for 5-6 hours, washing 3-5 times by using distilled water, and drying for 8-12 hours under the condition of 90-110 DEG C, so as to obtain the titanium nitride powder based on the low temperature liquid polymerization process. The titanium nitride powder disclosed by the invention has the characteristics of rich raw materials, low production cost and simplicity in industrial production. The titanium nitride powder prepared by the method is high in purity and excellent in morphology characteristics.

The invention provides a method for preparing high-strength gypsum from phosphogypsum, belonging to the technical field of building materials. The preparation method adopts a pressurized aqueous solution method and comprises the following steps: 1) phosphogypsum pretreatment, namely, taking a proper amount of the phosphogypsum, after adding tap water with a proper proportion for cleaning or washing with water for a plurality of times, adding quicklime for neutralization water washing for pretreatment until the pH value is neutral; 2) preparation of phosphogypsum slurry, namely, adding appropriate types and amounts of crystal transfer agents, and preparing the phosphogypsum slurry with appropriate water content; 3) autoclaved treatment, namely, autoclaving at an appropriate temperature (orpressure) for a certain period of time; and 4) drying and grinding of autoclaved materials. According to the invention, the high-strength gypsum with strength grades of alpha 25 and alpha 30 and whiteness of not less than 60 percent is prepared. Therefore, the preparation of the high-strength gypsum from the phosphogypsum solves the problem of massive accumulation of the phosphogypsum, develops the resource utilization of the phosphogypsum, but also save resources, improves the environment, and has important social and economic benefits.

The invention relates to a preparation method of polyhedral nano oxide for catalyzing. The preparation method comprises the following steps: preparing nano polyhedral copper oxide powder by a salt melting method taking a potassium source and a sodium source as melted salt; dissolving copper salt into water to prepare a solution; dropping an alkali source into the solution until the pH of the solution is 6-8; putting the solution into a constant-temperature magnetic stirrer to be stirred at constant temperature of 60 DEG C; filtering and washing for two to three times after sediment is generated and putting the product into a drying oven to be dried; putting a dried precursor, sodium salt and potassium salt into a ball milling tank to be milled; drying the milled mixed solution and transferring the solution into a crucible to be calcined; then cooling in the air to room temperature; and filtering, washing and drying to prepare the nano polyhedral copper oxide powder. The preparation method has the advantages of low synthesis temperature, simplicity in operation, uniform chemical components of the synthesized powder, good crystal appearance and the like; and a Rhodamine B degrading experiment shows that compared with commodity nano copper oxide, the catalyzing performance is greatly improved.

The invention relates to a method for preparing red aluminum oxide powder, relating to a method for preparing aluminum oxide powder to be added into the paint, characterized in that the preparing course in turn includes: a. adding fluoride and/or boride in 0.5%-2% into aluminum hydroxide, mixing, burning and then crushing the mixture into aluminum oxide powder; b. adding one or several ones of the colorizing agents: manganese oxide, iron oxide, copper oxide, and chrome oxide into the aluminum oxide powder, then adding in one of fluoride, and boride or their mixture to mix uniformly and then drying, burning 2-6 hours at 1050 deg.C-1550 deg.C, and grinding into the red aluminum oxide. The invention obtains the uniformly mixed particles of aluminum oxide and colorizing agents and fully uses the characters of solid phase reaction and gas phase reaction. And the prepared red aluminum oxide powder is uniform-colored, nontoxic and harmless, and has good crystal appearance.

The technological process of preparing high purity nanometer level powder features that three-layer laminated boat with filled material is made to enter to the head of the multiple tube furnace, pass through the reduction area and discharge from the tail after cooling while hydrogen is made to enter to the furnace from the tail, react to the material in the reduction area and discharge through the head of the furnace to the hydrogen treating device. The present invention has specially designed three-layer laminated boat and controlled material thickness in the boat, and has been used in producing high purity tungsten powder of 30-80 nm size and with crystal form, excellent granularity distribution. Compared with available technology, the present invention has the advantage of lowered cost.

The present invention relates to novel afatinib acid addition salts and crystal forms thereof. Compared with the prior art, the afatinib acid addition salts and crystal forms thereof of the present invention have one or more improved properties. The present invention also relates to a preparation method of the novel afatinib acid addition salts and crystal forms thereof, a pharmaceutical composition thereof, and the use thereof in preparing drugs for treating and/or preventing advanced non-small cell lung cancer and HER2-positive advanced breast cancer.