34results about How to "Evenly distributed and orderly" patented technology

The present invention relates to a method for improving performance of sintered Nd-Fe-B permanent magnetic property by a rapid-hardening flake grain boundary diffusion heavy rare earth compound in rare earth material technical field, which comprises the following steps: 1) rapid-hardening technology is adopted to prepare an Nd-Fe-B alloy rapid-hardening flake; 2) a high-energy ball mill is used to prepare the heavy rare earth compound into powder particles with diameter being smaller than 1mu m; 3) the rapid-hardening flake is put into heavy rare earth compound turbid liquid to carry out ultrasonic coating; 4) the coated rapid-hardening flake is put into a sintered furnace filled with Ar2 to carry out positive pressure thermal diffusion; 5) ball milling, powder processing, orientation shaping, isostatic pressing and vacuum sintering are adopted to prepare the strip-casting flake after the heat treatment into a magnet. The chemical formula of the Nd-Fe-B permanent magnetic material is NdxFe(100-x-y-z-xl)ByCozCuxl, and the mass percent is as follows: x is 30-31.5, y is 0.95-1, z is 1-1.2, and xl is 0-0.06. The magnet prepared by the invention improves the intrinsic coercivity on the basis of keeping the current magnetic energy product.

The invention discloses a method for preparing a fluoro-chlorine exchange catalyst with high specific surface area. The method comprises the following steps: carbonizing a metal-organic framework material MIL-101 (Cr) serving as a raw material and metal brine serving as an assistant, and performing fluoridation treatment, thereby obtaining the fluoro-chlorine exchange catalyst with high specific surface area. The method disclosed by the invention has the advantages that the metal-organic framework material MIL-101 (Cr) with high specific surface area, high internal pore volume and uniform andordered Cr element distribution serves as the raw material of the fluoro-chlorine exchange catalyst, so that the prepared fluoro-chlorine exchange catalyst also has the characteristics of high specific surface area, high internal pore volume and uniform and ordered Cr element distribution; the assistants are added by an adsorption method, so that the distribution of the assistants is uniform, andthe effective utilization rate of the assistants is improved; and the product has the characteristics of high specific surface area, rich internal pores, high catalytic activity, uniform assistant distribution and the like, and is applicable to the fluoro-chlorine exchange reaction.

The invention relates to a casting anti-friction and abrasion-resistant high aluminum zinc-based composite material and a preparation method thereof. The technical scheme is that the composite material takes zinc and aluminum as the base, and takes copper and magnesium as main alloy elements; trace alloy elements of strontium, titanium, boron, rare earth lanthanum and the like, and micron siliconcarbide and micron graphite non-metallic ceramic reinforcement particles are added, smelting is carried out, and thus substrate molten liquid is obtained; and the substrate molten solution is subjected to the deep processing technology of powder spraying, stirring and ultrasonic combined treatment so that the silicon carbide particles with abrasion-resistant performance and the graphite particleswith anti-friction performance can be well immersed in the substrate molten liquid and be uniformly dispersed and distributed in the composite material accordingly, and thus the fine-grained casting anti-friction and abrasion-resistant high aluminum zinc-based composite material obtained. The casting anti-friction and abrasion-resistant high aluminum zinc-based composite material has the characteristics of simple technology and low preparation cost. The reinforcement particles of the prepared product are uniformly distributed, and the composite material are excellent in plasticity, toughness and abrasion resistance, and stable in quality.

The invention discloses a biomass energy-saving and environment-friendly combustion furnace, which relates to the technical field of combustion furnaces. The biomass energy-saving and environment-friendly combustion furnace includes a body. A furnace body is fixedly installed on the left side of the body, and a grate is arranged in the furnace body. The cavity is connected, and a material guide plate is arranged under the hopper, and the right side of the material guide plate is fixedly connected with the inner wall of the machine body, and the left side of the material guide plate penetrates between the machine body and the furnace body and extends to the furnace body. An air guiding mechanism is arranged between the top and the inner top of the body. The biomass energy-saving and environment-friendly combustion furnace collects part of the steam generated during the working process of the furnace body through the air guide mechanism and absorbs moisture through the cotton cloth, so that the air guide mechanism can effectively prevent the exhaust gas from passing through the material guide plate when blowing the air flow into the processing mechanism. The fuel entering the furnace body is air-dried, which greatly reduces the moisture contained in the fuel.

The invention discloses a covalent organic framework with triphenylphosphine as a framework as well as a preparation method and application of the covalent organic framework and relates to the field of covalent organic framework materials. The compound is formed by polycondensation of a triphenylphosphine-containing trialdehyde monomer and diamine monomer. The preparation method comprises the following steps: adding monomer triphenylphosphine trialdehyde and diamine into a solvent; carrying out ultrasonic dispersion and adding an acetic acid solution for continuous ultrasonic operation to forma suspension turbid liquid; carrying out liquid nitrogen refrigeration-vacuumizing-degassing treatment, sealing and standing on the suspension to obtain a crude product; carrying out suction filtration washing on the crude product by using N,N-dimethylformamide, and then carrying out Soxhlet extraction and vacuum drying by using tetrahydrofuran and chloroform in sequence to obtain the covalent organic framework with the triphenylphosphine as the framework. The covalent organic framework related in the invention introduces a triphenylphosphine structural unit with high coordination capabilityinto a material framework for the first time, and has a broad application prospect in the fields of gas adsorption and separation, photoelectricity, in particular to catalysis.

The invention discloses a forming system of a sparkler tube washing machine. The forming system comprises a mold upstream-downstream receiving mechanism, a mold left-right swinging mechanism and a mold baseplate push-off and reset mechanism, which are compatible with one another to run. The forming system has the benefits that the forming work is fully-automatically completed, the human intervention is not needed in the whole process, paper tubes are uniformly and sequentially distributed, the forming quality is high, the degree of equipment integration is high, the mechanisms are reduced, the standardized production is convenient, and the debugging and the maintenance are convenient.

The invention discloses a preparation method of high magnetic permeability flaky soft magnetic alloy powder, which is characterized in that it comprises the following steps: (1), raw material selection: select soft magnetic alloy magnetic powder that can be used for absorbent, and the shape is not limited , select solvent; (2), primary ball milling; (3), primary reduction treatment; (4), secondary ball milling; (5), classification: by air classification technology, the magnetic powder in step (4) is carried out particle size classification, respectively Screen out the magnetic powder whose diameter-to-thickness ratio is less than 50:1, between (50:1) and (100:1), and greater than 100:1; (6), secondary reduction annealing treatment; (7), dispersion treatment. The invention has the characteristics of simple manufacturing process, low manufacturing cost, high yield, large diameter-thickness ratio, high magnetic permeability and the like.

The invention discloses a method for preparing a titanium alloy large-scale homogeneous ingot. In the method, a mold cavity is used, and a detachable auxiliary bracket is placed in the mold cavity, and the auxiliary bracket divides the mold cavity into N blocks; Sponge titanium is divided into large-grain sponge titanium and small-grain sponge titanium according to the particle size; the large-grain sponge titanium and small-grain sponge titanium are respectively weighed with the intermediate material, and N parts of mixed raw materials are obtained and poured into N compartments respectively block, and meet the requirement that the mixed raw materials in two adjacent blocks contain large-grain sponge titanium and small-grain sponge titanium respectively; the auxiliary bracket is taken out from the mold cavity; the mixed raw material in the mold cavity Press into a large single-weight electrode block at one time; repeat the above steps to obtain multiple large single-weight electrode blocks, assemble and weld them into consumable electrodes, and conduct 2-3 times of vacuum consumable melting on the consumable electrodes to obtain good uniformity A large homogeneous ingot of titanium alloy; the invention solves the problem of component segregation in casting.