196results about How to "Shape controllable" patented technology

The invention discloses a preparation method of a cadmium selenide or cadmium sulfide two-dimensional monocrystal nanosheet. The method comprises the steps that the CdSe or CdS two-dimensional monocrystal nanosheet is prepared through a van der Waals epitaxial growth technology, the method is characterized in that a mica sheet which is smooth in surface and free of chemical dangling bond is adopted to serve as a substrate, CdCl2 powder or Se powder or S powder serves as a source material, argon serves as carrier gas, CdCl2 stream is reacted with Se or S steam to form CdSe or CdS steam at high temperature, and the steam is deposited on the mica sheet for nucleation and epitaxially grows into the CdSe or CdS two-dimensional monocrystal nanosheet. The preparation method of the cadmium selenide or cadmium sulfide two-dimensional monocrystal nanosheet is easy to operate, low in cost and strong in controllability, the obtained CdSe or CdS has the advantages of being good in size uniformity, high in degree of crystallinity and the like, and important research value and wide application prospect in the fields of solar cells, field effect transistors, photoelectric detectors, photocatalyses and the like are achieved.

The invention relates to a fiber-reinforced heat-insulating silicone aerogel composite material and a preparation method thereof. The fiber-reinforced heat-insulating silicone aerogel composite material is prepared by the following steps of taking siloxane polymers with porous structure as a base, as well as flexible fiber felt as a reinforcement; blending a silicone solution; immersing the fiberfelt with the silicone solution; carrying out sol-gel processing; and carrying out washing and drying and so on. Compared with the prior art, the fiber-reinforced heat-insulating silicone aerogel composite material prepared by the preparation method is excellent in heat-insulating property, very high in mechanical durability and hydrophobicity, simple in preparation processes, and low in cost; moreover, the fiber-reinforced heat-insulating silicone aerogel composite material has certain flexibility, so that the fiber-reinforced heat-insulating silicone aerogel composite material is high in designability and convenient for future size-cutting. Generally, the fiber-reinforced heat-insulating silicone aerogel composite material meets basic insulation requirements; and thus, the fiber-reinforced heat-insulating silicone aerogel composite material is applicable to a variety of areas, including buildings, walls, pipes and the like.

The invention discloses a carbon nano tube reinforced metal matrix composite material and an in-situ preparation method thereof in the technical field of composite materials. The in-situ preparation method comprises the following steps of: firstly, coating a carbon source substance and a catalyst precursor on the surface of metal powder; secondly, generating carbon nano tubes in situ on the surface of the metal powder on the basis of a catalytic pyrolytic reaction to obtain composite powder of the carbon nano tubes and a metal; and finally, performing densification by adopting a powder metallurgy technique to obtain the carbon nano tube reinforced metal matrix composite material. In the preparation method, tiny and dispersed catalyst particles are generated in situ by bringing the steric effect of the carbon source substances such as an organic substance or a polymer and the like, and then uniformly dispersed carbon nano tubes are generated in situ on the surface of the metal powder through the catalytic pyrolytic reaction of the organic substance or the polymer.

The invention relates to a total internal reflection micro lens array for a wide-angle lighting system. The micro lens array includes a plurality of Fresnel lens structures formed on a same optical incidence surface. Each of the Fresnel lens structure comprises a plurality of grooves, each having a reflecting surface and a refractive surface. Incoming radiation incident through the incidence surface of the lens structure is internally totally reflected by the reflecting surface, refracted by the refractive surface and exits the lens structure.

A process for preparing Al2O3 aerogel carried catalyst includes such steps as preparing Al(OH)3 gel, depositing active component to Al(OH)3 gel by deposition-precipitation method, supercritical drying in high-pressure reactor and calcining. A process for preparing nano carbon tubes by catalytic cracking of methane with said catalyst is also disclosed. The resulant nano carbon tube features small diameter, easily controllable form and simple preparing process.

The invention relates to a three-dimensional cellular automaton based lightweight model and optimizing method, comprising operation steps: firstly, performing space dividing on an input network model with an octree, then according to design demands, establishing neighborhood information based cellular evolution, then, defining the relation that a neighborhood information based cellular automaton combines with FEA feedback information based finite element analysis, establishing FEA analysis feedback evolution, and generating a lightweight structure based on two evolution rules. A feedback based optimizing strategy is established, simulated information can be fed back to a design flow, and a drive structure is optimized to change macro attributes of a design target. Finally, the generated lightweight model is subjected to surface recreating and related parameters verifying, and an experiment proves that the invention is very suitable for establishing a 3D (three-dimensional) printing lightweight model.

The invention discloses a Co-Zn-Cr-Al composite spinel type blue ceramic pigment which is expressed by a general formula (CoxZn1-x)(CryAl1-y)2O4, wherein x and y represents mole fractions; x is 0-1; y is 0-1; and when x and y are different in value, the products are different in color. Besides, the invention also discloses a preparation method of the Co-Zn-Cr-Al composite spinel type blue ceramic pigment. The ceramic pigment disclosed by the invention is small in particle size and uniform in distribution, has high coloration capability in glaze, and is high in coloration stability. Besides, the ceramic pigment is simple in preparation process and controllable in color and shape, and can meet different application requirements; and the whole process is easy to control and realize, and the product quality is stable, thereby being beneficial to large-scale popularization and application.

The invention discloses a preparation method for a carbide catalyst for organic carbon vapor phase growth and an application thereof. The method comprises the following steps: adding a precipitator or a complexing agent or a dispersing agent, or a precipitator and a dispersing agent, or a complexing agent and a dispersing agent into a compound or complex containing a catalytic element, wherein the compound or complex containing the catalytic element is the compound containing one or more of rare earth elements, iron, cobalt, nickel, molybdenum, zirconium, copper, zinc, magnesium, aluminium and silicon or the complex thereof; through one or more of a precipitation method, a complexing method, a hydrothermal method, a high-pressure hydrothermal method and a sol-gel method, synthesizing to prepare mixed solution containing the catalytic elements, spray-drying the mixed solution by a spray drying machine, rapidly removing a solvent to form a catalyst precursor with catalytic element nano-state distribution, and calcinating the catalyst precursor in the high temperature, to obtain the carbide catalyst for the organic carbon vapor phase growth.

The invention discloses a cold-rolled non-oriented electrical steel 35WD1900 and a production method thereof. The cold-rolled non-oriented electrical steel 35WD1900 comprises the following chemical components by weight: <= 0.005% of C, 2.0-2.5% of Si, 0.2-0.4% of Mn, 0.08-0.12% of P, <= 0.008% of S, 0.3-0.5% of Al, 0.004-0.006% of B and the balance of Fe and unavoidable impurities. The productionmethod includes the following steps: (1) a steel plate is subjected to continuous casting to form a continuously-cast billet, which is heated in a heating furnace after being cooled, and then subjected to hot rolling; (2) the hot-rolled billet is subjected to acid pickling, first cold rolling, decarburizing annealing and second cold rolling; and (3) after being subjected to the second cold rolling, the electrical steel is subjected to secondary annealing and coating to obtain the product. The performance of the cold-rolled non-oriented electrical steel 35WD1900 of the invention can meet the requirements of the high-strength non-oriented electrical steel used in the drive motors of new energy automobiles; and the welding performance and the stamping performance are good.

The invention relates to a palladium nanoparticle catalyst and a preparation method as well as an application thereof. The preparation method comprises the following steps: controlling the pH of the reaction environment to be equal to 2; combining metal ions of different concentrations with inner N of branches; and finally, reducing the metal ions by utilizing NaBH4 to generate a metal Pd nanoparticle catalyst with different diameters (1-3nm) of particles. The catalyst has good catalytic effect on the Suzuki reaction aided by microwaves. The method has the characteristics of simple process, convenient operation, controllable shape, good application effect and the like.

The invention discloses a method for preparing a Mn2O3 porous micro-nano structure material having controllable morphology. The method comprises that ammonium bicarbonate and manganese acetate as raw materials in water as a solvent undergo a reaction under control of concentrations of the two raw materials, a mixing rate and reaction time to produce manganese carbonate precursors having different main body morphologies, and the manganese carbonate precursors are sintered at a high temperature to form a Mn2O3 porous negative electrode material having a controllable main body structure. The Mn2O3 material microstructure can be controlled and changed from a porous ball to a porous cube and has the sizes of 1-1.5 microns and mesoporous sizes of 10-30nm. The method has the advantages of common and nontoxic raw materials, simple and easy reaction, high conversion rate, large yield, industrial production feasibility and excellent performances in the field of sodium ion batteries.

The invention provides a water-permeable brick with artificial carbonized steel slag pellets as aggregates and a preparation method thereof, belonging to the technical field of green building materials. The water-permeable brick comprises a base layer and a surface layer, wherein the surface layer is located on the base layer; the base layer is made of continuously graded artificial carbonized steel slag pellet aggregates; and the surface layer is made of fine aggregates obtained by crushing and sieving carbonized steel slag bricks and formed after filling and leveling of the fine aggregates.The water-permeable brick comprises the following components by weight: 60 to 70% of artificial carbonized steel slag pellet aggregates, 5 to 10% of the fine aggregates obtained by crushing and sieving carbonized and cured steel slag bricks and having a particle size of no more than 4.75 mm, 15 to 20% of steel slag micropowder, 4 to 5% of a reinforcing agent and 4 to 5% of tap water. According tothe invention, through large addition amount of steel slag, industrial waste residues are greatly consumed; meanwhile, industrial waste gas CO2 is used as a raw material in the process of carbonization and curing, and the reaction of the CO2 with steel slag products in a carbonization kettle is an exothermic reaction, so no external heat source is need; and the advantages of waste utilization, carbon sequestration, energy conservation, emission reduction, simple preparation process, low equipment requirements, short production cycle and low cost are obtained.

The invention discloses in-situ microfibrillar polypropylene series resin composite foamed particles and application thereof, and belongs to the technical field of foaming materials. By adopting the in-situ microfibrillar polypropylene series resin composite foamed particles, the technical problem of high in-mold forming pressure of polypropylene series resin foamed particles caused by improving the rigidity of the polypropylene series resin foamed particles in the prior art can be solved. The composite foamed particles are prepared from in-situ microfibrillar polypropylene mixed resin particles by using a dispersion medium release process, wherein the in-situ microfibrillar polypropylene mixed resin particles comprise matrix resin and fiber-forming resin, the diameters of the in-situ microfibrillar polypropylene mixed resin particles are 0.5-2mm, the heights are 1-2 times that of the diameters, the matrix resin is polypropylene series resin, the melting temperature of the fiber-forming resin is more than that of the matrix resin, the fiber-forming resin is not completely compatible with the matrix resin, and the mass percentage of the fiber-forming resin is 1-30%. According to the composite foamed particles disclosed by the invention, the in-mold forming pressure cannot be increased, the composite foamed particles can be formed by using a general forming machine, the preparation cost cannot be increased, and an obtained foam forming body has relatively high rigidity and is smooth in surface.

The invention discloses a lead-containing raw material wet recovery treatment method, which comprises: 1) carrying out a reaction on a reaction mother liquor and a lead-containing raw material to obtain a lead-containing reaction liquid, wherein the reaction mother liquor contains a sulfate, a catalyst, a reducing agent and a complexing agent and has a pH value of 6.0-13.0; 2) carrying out a reaction on the lead-containing reaction liquid obtained in the step 1) and a precipitating agent or a solution containing a precipitating agent, and controlling the pH value at 4.5-11.0 to obtain a sulfur-containing reaction liquid and a solid precipitate A; and 3) carrying out a reaction on the all or part of the sulfur-containing reaction liquid and a desulfurization agent or a solution containing adesulfurization agent to obtain a regenerated reaction liquid and a solid precipitate B, wherein the solid precipitate A is one or a plurality of materials selected from lead carbonate, basic lead carbonate, NaPb2(CO3)2OH, lead sulfite and lead sulfate, and the solid precipitate B is one or a plurality of materials selected from calcium sulfate, calcium sulfate dihydrate and barium sulfate.

The invention discloses a method for adhering and combining a zirconia prosthesis and a natural tooth. The method has the advantages that an existing sand blast process for processing is not used, thesurface of dental-department zirconia ceramic is milled, material mechanical damage is avoided, micro-ornamentation is formed on the surface of the dental-department zirconia ceramic to perform surface roughening under the condition that the later mechanical strength of the ceramic is unaffected so as to increase the specific surface area of the zirconia ceramic, and the zirconia prosthesis and the natural tooth are adhered and combined by using resin as the adhesive through methods such as surface processing, coating and novel sand blast.

The invention discloses a heat treatment system used for producing ultrahigh strength steel. The technological layout of the system is that: (1) a quenching machine is arranged behind a roller-hearth quenching furnace; a long transporting roll table with a length of 30 to 35m is arranged behind the quenching machine; and an open-fire low-temperature roller-hearth tempering furnace is arranged behind the transporting roll table; (2) a steel plate is heated in the roller-hearth quenching furnace, and the temperature is maintained; (3) the quenching machine is configured as in a quenching mode; and the technological speed of the quenching machine is controlled at 5 to 6m/min according to the thickness of the steel plate, wherein the thickness of the steel plate is 8 to 60mm. (4) the steel plate is heated; the temperature is maintained; the steel is fetched and quenched; the quenched steel plate is places on the transporting roll table for self-tempering, wherein the self-tempering temperature is Ms to Mf (the specific temperature is determined according to the steel type); (5) when self-tempering is finished, the steel plate is delivered to the tempering furnace in time with high speed for carrying out carbon distribution, wherein the temperature is maintained; the steel plate is delivered forward according to a preset technological speed; (6) when a carbon distribution time is satisfied, the steel plate is fetched from the furnace in time to be air-cooled; (7) when the steel plate is processed through a Q+P process, the steel plate can be transported to another tempering furnace for tempering when necessary.

The invention relates to a heterogeneous polymerization reaction catalyst and application of the heterogeneous polymerization reaction catalyst to preparing a homopolymer and a copolymer. The heterogeneous polymerization reaction catalyst mainly comprises a supported catalyst promoter A and a catalyst B, the structure of the catalyst B is shown in the formula (I) or the formula (II), R1-R5 are respectively independently chosen from hydrogen, alkyl group, substituendum of the alkyl group, alkoxy group, alkyl sulphanyl, halogen, nitryl, aryl group or substituendum of the aryl group in the formula, the adjacent groups in the R1-R5 form a ring and the number of the formed ring structures is less than 4, R6 is the alkyl group or the aryl group, and L is alkyl group substituted phosphine or allyl. The heterogeneous polymerization reaction catalyst can be used to prepare the homopolymer and the copolymer, the activity is relatively high, the tolerance of the polar functional group is relatively good, the molecular weight of the prepared polymer is relatively large, the distribution of the molecular weight is relatively narrow, the morphology is controllable, no subsequent processing is needed, and the phenomenon of adhesion on a kettle is effectively improved.

The invention belongs to the technical field of preparation of nano materials, and relates to a preparation method of spherical nickel diselenide powder. The method comprises the following steps: 1) mixing Ni<2+>-containing water soluble salt and simple substance selenium powder in a solvent, ultrasonic oscillation for 20-40 minutes, and uniformly stirring to obtain a reaction solution, wherein the solvent is prepared by mixing ethylenediamine and 60-80 wt% hydrazine hydrate in a volume ratio of 1:(3-6); 2) reacting the reaction solution at 100-180 DEG C in a sealed environment for 12-20 hours; and cooling, washing with ethanol and distilled water 2-3 times, and drying at 60-80 DEG C to obtain the spherical nickel diselenide powder of which the average diameter is 2.8-3.2 mu m. The method provided by the invention does not need to previously prepare any template or use any surfactant, and has the advantages of mild reaction, one-step synthesis and simple technique; and the prepared nickel diselenide has the advantages of regular shape and uniform structure, and is beneficial to subsequent application.

The invention has provided a Al-Zr-B-O reaction system which can synthesis the high performance aluminium base in situ composite. In the 800-900 deg.C Al or Al-alloy fusant, we can addinto the mixture of Zr and B oxidation or salt which is 5-25% Al or al-alloy fusant. The Al-Zr-B-O reaction system solidify to the high performance aluminium base composite which insist of Al3Zr, ZrB2, Al2O3-15%, and Al or Al-ally. The initial temperature for the reaction for the reaction of Al-Zr-B-O system is obviously lower than the Al-Ti-O system. The new (Al3Zr+Al2O2+ZrB2)/Al and the (Al3Zr+Al2O3+ZrB2)/A356 have the good performance of mechanics, physics and wear resistant.

The invention discloses a W18O49 coated carbon fiber composite material and a preparation method thereof. The W18O49 coated carbon fiber composite material takes carbon fibers as a reaction source and the W18O49 coated carbon fiber composite material is produced by adopting a solvothermal method; a monoclinic W18O49 nano-material grows on the carbon fibers through the solvothermal method in a coating manner; in a solvothermal preparation process, any template and any catalyst are not needed; the technology is simple, the yield is high and the cost is low, so that the W18O49 coated carbon fiber composite material is suitable for batch production; the W18O49 nano-material directly grows on carbon cloth and the prepared nano composite material has a uniform shape and coating tightness and can be used as photocatalysis, electrocatalysis, solar cell, flexible sensor, field emission and lithium-ion battery negative electrode materials.