184results about How to "low equipment requirements" patented technology

The invention belongs to the technical field of environmental engineering, and discloses a method for preparing a biological carbon immobilized microorganism. The preparation method comprises the following steps: uniformly mixing a polyvinyl alcohol solution with a sodium alginate solution to form a mixed gel solution; mixing a biological carbon adsorbed microorganism bacterial suspension with the mixed gel solution to obtain a mixed bacterial liquid; dropping into a calcium chloride (CaCl2) solution with saturated boric acid for crosslinking, and transferring into an anhydrous sodium sulfate solution for crosslinking to prepare immobilized beads; and washing with normal saline for 3 times for later use. The prepared immobilized beads have the advantages of large specific surface area, high opening ratio, high moisture content and high microorganism activity.

The invention belongs to a preparation technology of a silicon carbide ceramic-based composite material and relates to the improvement on a method for preparing the self-healing silicon carbide fiber-reinforced ceramic-based composite material. The method is characterized by comprising the following steps of: preparing silicon carbide fiber precast body, preparing precursor steeping liquor; preparing silicon carbide fiber precast body interface layer; molding, vacuum steeping, drying, hot mold pressing, and cracking; steeping-drying-cracking with a die; and steeping-drying-cracking without the die. The method for preparing the self-healing silicon carbide ceramic-based composite material disclosed by the invention has the advantages that the process is simple, requirements on the device are low, the preparation period is short, the preparation cost is low, and the self-healing oxidation capacity resistance is strong.

The invention provides a shale compressibility comprehensive evaluation method based on uniaxial strength experiment. The method comprises the steps of (1) taking a shale core sample for executing uniaxial compressive strength test, testing an elasticity parameter, and drawing a stress-strain curve diagram; (2) calculating normalized elasticity modulus and normalized poisson ratio to obtain a brittleness index; (3) obtaining key points on the stress-strain curve, and calculating the shape index of the stress-strain curve; (4) obtaining fracture distribution diagram of the side face of the fixed sample, and calculating a fracture distribution index through box-counting dimension method; (5) measuring spallation fragment mass distribution at different scales through a screen and a balance so as to obtain a block distribution index; and (6) calculating arithmetic mean value of the obtained brittleness index, shape index of the stress-strain curve, fracture distribution index and block distribution index of fragments to get the comprehensive compressibility index. The method provided by the invention is used for evaluating fracture net forming capability of the shale after being compressed, the experiment is simple and easy to carry out, and post treatment is visual and simple, so that the method is suitable for indoor evaluation and oilfield in-site application.

The invention relates to a production method for removing aluminum (Al<3+>) and purifying rare earth from a rare earth solution and belongs to the field of rare earth hydrometallurgy and chemistry. The method comprises the following steps that (1) raw materials are prepared, the pH value of the rare earth solution is smaller than or equal to 3, the concentration of REO is 20 g/L-300 g/L, and the concentration of Al2O3 is 0.8 g/L-3 g/L; a complex precipitant is one of hydroxyquinoline or ramifications of the hydroxyquinoline; and (2) precipitation aluminum removal is conducted, the complex precipitant is added into the rare earth solution prepared in the step (1), stirring is conducted at the constant temperature, a reaction is conducted, the pH value of the solution is adjusted, precipitation is conducted, and aluminum-removed rare earth liquid is obtained through vacuum filtration and separation. According to the production method, the rare earth solution containing a large quantity of aluminum ions is treated through the hydroxyquinoline or the ramifications of the hydroxyquinoline, the aluminum ions can be removed from the rare earth solution, the effect that the aluminum ion removal rate reaches 90% or above is guaranteed, the rare earth loss ratio is not larger than 5%, and the aluminum ion concentration in the rare earth solution is greatly decreased.

The invention belongs to the preparing field of porous carbon materials, which relates to a porous carbon material with high specific surface area and narrow pore distribution and which is prepared by adopting pin needles with biomass materials. The specific surface area of the porous carbon materials is capable of surpassing 3000m/2g by adjusting activating agent dosage, activating temperature and activating time. The method of the invention has low requirement for production facilities, and has simple preparing process and low time-consumption. The main byproduct of the reaction is tar which is a product with high value in use. The washing solution of the porous carbon materials is aqueous solution which is rich in potassium ions, and is perfect potash fertilizer for agricultural industry via simple dealing. The porous carbon materials have high application prospect in the fields like the storage and separation of gas, electrode materials, catalysts or catalyst carriers in a plurality of chemical reactions, sewage disposal, recovery of noble metals and the like. The method has the advantages of cheap, plentiful and easily gained raw materials, simple preparing process, preparing condition without region limitation, thereby being adapted for large-scale industrial production.

The invention discloses a preparation method for a Bi2O3/(BiO)2CO3 heterojunction catalyst with visible photocatalytic activity. The preparation method comprises the following steps: mixing and dissolving bismuth nitrate pentahydrate or bismuth citrate and urea into deionized water, and carrying out room temperature stirring to form a precursor solution; transferring the precursor solution into a high-pressure reaction kettle, preserving the temperature under 160 to 180 DEG C for 12 to 24 hours, and performing furnace cooling to room temperature; washing the obtained powder by deionized water and absolute ethyl alcohol in sequence, and then performing vacuum drying under the temperature of 80 DEG C to obtain (BiO)2CO3 powder; putting the (BiO)2CO3 powder under the temperature of 400 to 450 DEG C for calcining for 20 to 60min to obtain the Bi2O3/(BiO)2CO3 heterojunction catalyst. The preparation method has the beneficial effects that hydrothermal treatment is firstly carried out, and then calcining is performed to obtain a product. The preparation method is easy to operate, and the equipment requirement is low; various complicated synthesis devices are not needed; the formation of a heterojunction interface is favorable for transferring of photo-generated electrons and photo-generated holes and the improvement of the catalytic activity; the prepared heterojunction catalyst is higher in photocatalysis performance than that of pure Bi2O3 and pure (BiO)2CO3.

The invention discloses a solar battery based on an inorganic bulk heterojunction and a preparation method thereof. The battery comprises a glass substrate, an FTO (fluorine-doped tin oxide) layer which is used as a positive electrode, a heterojunction composite film layer consisting of an Sb2S3 (stibnite) block and a TiO2 (titanium dioxide) nano-bar array, a polymer MEH-PPV electron barrier layer, a PEDOT: PSS hole transferring layer and an Au (gold) film layer as a battery negative electrode. The preparation method of the battery is simple, and the battery has a spectrum response range of 300 nm to 750 nm; and when an optical active layer of the battery stays at an illumination state, conversion efficiency of the battery can reach 5.58 percent.

The invention discloses a purification method of a nano diamond ash material. The method adopts a three-step method to remove impurities in nano diamond detonated ash and comprises the following steps of: step 1, utilizing nitric acid or hydrochloric acid to remove impurities including metal oxides or metal salts; step 2, utilizing a concentrated sulfuric acid and perchloric acid united oxidization method to remove graphite carbon components in nano diamond; and step 3, utilizing hydrofluoric acid to remove silicon oxide. The invention provides a production method of the high-purity nano diamond, which has the advantages of simple process, low equipment requirements and high product purity; and the produced nano diamond can completely meet the requirements of relevant fields, particularly the application of fields including ultra-precise polishing, high-grade running-in (lubricating) oil, wear-resisting material additives, wear-resisting surface composite plating and the like.

The invention discloses a manufacturing method of sorbitol and mannitol through cellulose, which is characterized by the following: placing cellulose in the water; adding catalyst to react to produce sorbitol and mannitol under 190-350 deg. c; coupling the hydrolyzed intermediate to hydrogenate; obtaining the product without adding inorganic acid; reducing investment; lengthening the lifetime of catalyst.

The invention discloses a method for preparing nitrogen doped porous carbon microspheres and belongs to the technical field of carbon materials. The method for preparing the nitrogen doped porous carbon microspheres comprises the following two steps of: 1, adding 20-50 mL of deionized water into a certain mass ratio of ammonium salt (such as ammonium chloride, ammonium sulfate or ammonium nitrate) and porous starch, carrying out magnetic stirring for 3-6 hours so that the ammonium salt is sufficiently adsorbed by the porous starch, then carrying out suction filtration and drying to obtain the porous starch with the ammonium salt; and 2, carbonizing the porous starch adsorbed with the ammonium salt for 2-6 hours at the temperature of 600-900 DEG C under the protection of inert atmosphere to obtain the nitrogen doped porous carbon microspheres. According to the invention, the used raw material in the method is the cheap and available commercialized porous starch; the nitrogen doped porous carbon microsphere is prepared on the basis that the original porous morphology of the porous starch is ensured, preparation process has no high requirement on equipment and is easy to operate, the preparation of the porous carbon microsphere which has a porous structure and is doped with nitrogen atoms is achieved by one step; and the material prepared by using the method has a potential application prospect in the fields of biological materials, catalysis, electrochemistry and the like.

The invention discloses an alcohol-soluble polyurethane resin used in plastic ink. The alcohol-soluble polyurethane resin is characterized by comprising the following ingredients by weight: 2.5-8 parts of polyester polyol, 20-30 parts of polyether polyol, 5-10 parts of diisocyanate, 1-5 parts of diamine, 60-66 parts of alcohol diluent, and 0.01-0.15 part of stabilizer. The invention further discloses a preparation method of the alcohol-soluble polyurethane resin used in plastic ink, and the preparation method is simple in process and low in equipment requirement. The average molecular weight of the alcohol-soluble polyurethane resin used in plastic ink is 20000-30000, and the solid content is 34-36%, and the alcohol-soluble polyurethane resin can be used as a bonding material to be prepared into ink, merely the alcohol is used as a solvent, and as the solvent or a part of solvent is replaced by water, the alcohol-soluble polyurethane resin is environmental-friendly, safe, very beneficial for environmental protection and convenient to use; the diluent can be a water solution of water and alcohol or alcohol; a printed ink layer is high in glossiness and has good transparency, water resistance and weather resistance; and as a result, the alcohol-soluble polyurethane resin is suitable for various intaglio and rotation flexography, with good transitivity and adhesion solidness.

The invention discloses a device for realizing a reciprocating extrusion process on a one-way hydraulic press. The device is characterized in that a hollow cylindrical cavity is formed in an annular extrusion cylinder; an upper male die and a lower male die which can be in axial sliding in the hollow cylindrical cavity are respectively arranged at the top and the bottom of the hollow cylindrical cavity; a cylindrical blank is placed in the hollow cylindrical cavity; a die core inserted block is clamped and embedded into a groove in the inner cylinder wall of the annular extrusion cylinder to form an annular reduced section; the circumference of the annular extrusion cylinder is fixedly sleeved with a pre-tightening ring; a female die pressing plate is fixedly connected to the top of the pre-tightening ring and is propped against the top surface of the annular extrusion cylinder; a female die composed of the annular extrusion cylinder, the female die pressing plate, the pre-tightening ring and the die core inserted block is formed in the manner that the bottom surface of the pre-tightening ring or the top surface of the female die pressing plate is placed in a downward-concave platform on the top surface of a female die fixing plate to form an upright-placing or inverted state; an nitrogen spring in the hollow cavity of a base forms underpropping to the lower male die. According to the invention, the reciprocating extrusion technology on the one-way hydraulic press is realized in an assisting way, reciprocating extrusion deformation under different extrusion ratios can be satisfied, and the fine and equiaxed fine-grain tissues can be achieved.

The invention relates to a MoO3 and ordered mesoporous carbon composite electrode material and a preparation method thereof. In the invention, a double electric layer capacitor provided by ordered mesoporous carbon and a pseudo-capacitor provided the stratiform transition metal oxide MoO3 are utilized together to improve the comprehensive electrochemical properties of the capacitors. The composite material has an ordered mesoscopic structure, and MoO3 nano particles have uniform size and are uniformly dispersed in a host ordered mesoporous carbon material, wherein the size of the MoO3 nano particles is smaller than 4nm, and the mass ratio of the host ordered mesoporous carbon material to a guest ordered mesoporous carbon material is 1:(0.01-0.18). The method comprises the following steps of: carrying out surface fictionalization treatment on the host material; then filling precursor solution MoO3.0.5H2O2.H2O sol into ordered pore canals of the host mesoporous carbon material by using a liquid phase synthesis method; and finally obtaining a MoO3 and ordered mesoporous carbon composite electrode material through filtering, washing and heat treatment. Proved by electrochemical testing, the discharge specific capacitance of the composite electrode material is improved and the stability is good. The invention has simple process, low equipment requirement, and strong maneuverability and can be realized at normal temperature. The invention can be widely applied to electrode materials of electrical devices.

The invention discloses a preparation method of a halogen-free flame-retardant composition. The preparation method comprises the following steps: (a) weighing melamine phosphate, piperazine diphosphate and assistant activator in a proportion, and putting in a high-speed mixing machine for stirring and mixing uniformly to obtain a halogen-free flame-retardant composition premix; and (b) performing a high-temperature dehydration condensation reaction on the halogen-free flame-retardant composition to obtain the halogen-free flame-retardant composition taking burnt (poly) melamine phosphate and burnt (poly) piperazine sulfate as main components. According to the preparation method of the halogen-free flame-retardant composition disclosed by the invention, the technology is simple and practicable, the requirement for equipment is low, the yield of product is as high as more than 90%, the phosphorus content is high, and the impurities such as halogen or inorganic salt are not contained; a flame-retardant polyolefin composition prepared from the halogen-free flame-retardant composition can obtain good flame-retardant performance after a small amount of halogen-free flame-retardant composition is added, and the composition has high water resistance and heat resistance and excellent pigmenting property, can be prepared into various forming products according to different uses, and has excellent industrial application prospect.

The invention discloses an improved semiautomatic flame cutting machine, which comprises a semiautomatic flame cutting machine (4), a liquid oxygen tank (8) and a gun head connected with one another through air belts, wherein the gun head is a prolonged gun head (2) for digital control cutting, the length of the gun head is 450 to 550 mm, and an inlet cutting nozzle (5) connected with the gun head is a divergent inlet cutting nozzle. The improved semiautomatic flame cutting machine is also provided with a rail (7) which is in slide connection with a base of the semiautomatic flame cutting machine (4). The improved semiautomatic flame cutting machine can process a steel box girder groove of the semiautomatic flame cutting machine through the steps of preparation before operation, normal operation and post-operation; besides, the improved semiautomatic flame cutting machine has the advantages of having simple and convenient operation, ensuring the quality, shortening the time limit, reducing the cost and the like, and can replace the conventional mode of processing the groove mechanically.

The present invention provides a high tungsten doping content nanometer VO2 powder material and a preparation method thereof. According to the preparation method, a hydrothermal synthesis doping method and a sol-gel doping method are organically combined so as to improve the tungsten atom doping amount; and the chemical activity of the used raw material white tungstic acid is much higher than the chemical activity of other compounds of tungsten, such that the amount of the tungsten doped in the VO2 lattice is substantially increased. With the method, the VO2 phase-transition temperature can be effectively reduced, and wide applications can be achieved.

A method of utilizing computer to simulate interaction of protein includes preparing protein structure in PDB databank to be proper study system, carrying out energy minimization treatment on said system, heating said system up to set temperature then carrying out multi-step balance treatment on said system, executing molecular dynamic simulation on said system and studying protein amino acid residual base acted as key function in atom movement race and confirmation variation as well as variation process under set conditions.

The invention belongs to the technical field of preparation of porous carbon materials, and discloses a porous carbon material with a high specific surface area by virtue of fungal pretreatment as well as a method and application thereof. The method comprises the following steps: (1) drying and crushing waste biomass to obtain crushed waste biomass; 2) carrying out the constant-temperature oscillation reaction for the crushed waste biomass and fungal spore suspension in a liquid culture medium, filtering, washing, and drying to obtain a carbonization precursor; carrying out the high-temperature carbonization treatment to obtain a primary carbonized substance; and 3) activating the primary carbonized substance and an activator in inert atmosphere to obtain the porous carbon material with ahigh specific surface area. According to the invention, the porous carbon material is prepared by virtue of the regulation of fungal treatment, so that the waste biomass is effectively utilized, the preparation process is simple, the production cost is low, and the method is environment-friendly; and the obtained porous carbon material is high in specific surface area and unique in aperture distribution and capable of obtaining micro-porous, mesoporous or micro-mesoporous carbon materials. The porous carbon material is applied to the field of adsorption.

The invention discloses a method for preparing cyclopentanone and cyclopentanol from furfural as a raw material and cheap non-noble metals including cobalt and nickel as a catalyst. The preparation method comprises following steps: the reaction raw material furfural, a solvent and the metal catalyst are added to an intermittent closed high-pressure reactor and subjected to a catalytic selective hydrogenation reaction during stirring, the dosage of the catalyst is 1/30-1/2 of the mass of furfural, initial pressure of hydrogen is 1-8 MPa, the reaction temperature is 110-170 DEG C, and the reaction time is 0.5-10 h. According to the preparation method, the biomass raw material furfural replaces traditional adipic acid, a derivative of adipic acid and cyclopentene, the raw material furfural isreproducible, and the preparation method is independent of fossil resources and is a sustainable process route. Meanwhile, the method has low requirement for equipment, is simple to operate and has high product selectivity; with water as a solvent, reduction of production cost is facilitated, and environmental protection is also facilitated.

The invention discloses a method for extracting phytic acid from jatropha curcas seed cakes or jatropha curcas seeds, and the phytic acid is prepared by using the jatropha curcas seed cakes or the jatropha curcas seeds, the oil which is extracted, as raw materials and adopting the steps as follows: lixiviating with diluted acid, removing impurity, neutralizing with alkali, splitting with acid, ion exchanging, decoloring and concentrating. The invention can also be used for preparing feed protein while prepaing the phytic acid, and has high yield and better purity. The extraction rate of the phytic acid is more than 80 percent, the yield of the phytic acid reaches 8-9 percent, and the prepared phytic acid is concentrated liquid with concentration reaching 50-60 percent. After the phytic acid is extracted, the content of crude protein in the residue is further concentrated and improved to reach 25-30 percent; the in vitro digestibility coefficient of the crude protein reaches 43.57 percent and is improved by about 150 percent, compared with the in vitro digestibility coefficient of the crude protein of the seed cakes the phytic acid of which is not extracted. The invention has simple process, wild condition and low energy consumption, meets the requirement of the environment protection, and is a green process of comprehensively utilizing the jatropha curcas seed cakes or jatropha curcas seeds.

The invention provides a scale removing agent and a preparation method and application thereof. The scale removing agent is prepared from, by weight, 8%-10% of HCl, 1.5%-2% of turning agent, 0.5%-1% of imidazoline quaternary-ammonium-salt corrosion inhibitor, 8%-10% of polyaspartic acid, 5%-10% of sodium fatty alcohol ether sufate and the balance water. The preparation method of the synthesized scale removing agent is simple and easy to implement, the requirement on equipment is low, and on the premise of guaranteeing safe production of an oil field, scale in a three-phase separator and a pipeline can be slowly and completely removed.

The invention discloses a method for preparing a europium-doped hydroxyapatite nanorod. According to the method, diammonium hydrogen phosphate, cetyl trimethyl ammonium bromide, anhydrous calcium chloride and europium oxide are used as raw materials, a mixed solution of the anhydrous calcium chloride and europium nitrate is dropwise added to a mixed solution of the diammonium hydrogen phosphate and the cetyl trimethyl ammonium bromide, the mixed solutions react at a certain temperature, after the reaction is over, precipitate is washed in distilled water and distilled water for multiple times and dried in the suction filtration process, and then the europium-doped hydroxyapatite nanorod is obtained. According to the method, the reaction temperature is low, the requirement for equipment is low, operation is simple, and the prepared material is controllable in shape, high in purity, good in crystallinity, dispersity and luminescence property, and wide in application prospect.

The invention discloses a method for preparing high-purity nanometer lithium manganate in the field of lithium batteries. The high-purity nanometer lithium manganate is prepared by taking potassium permanganate, lithium hydroxide, ascorbic acid and deionized water as raw materials through hydrothermal reaction, wherein the purity of the high-purity nanometer lithium manganate is not less than 99 percent. The lithium manganate particles prepared by utilizing the method are nanoscale particles, the particle size distribution is uniform, and the high-purity nanometer lithium manganate has the advantages of high specific capacity, excellent rate charge and discharge performance and the like. Compared with the traditional method for preparing lithium manganate by utilizing high-temperature solid-phase reaction, the method disclosed by the invention is simple in process steps, low in equipment requirement and low in energy consumption, the nanoscale lithium manganate particles with excellent performance can be directly obtained, and the method has obvious advantages.

The invention discloses surface covalent grafting modified hexagonal boron nitride nano-sheets and a preparation method thereof. According to the preparation method, under alkali metal hydroxide assisted ultrasonic action, preparation and surface hydroxylation of boron nitride nano-sheets are achieved in one step; the boron nitride nano-sheets are subjected to covalent graft modification by adopting high-activity diisocyanate molecules; and one isocyanate group can be subjected to a hydrogen transfer reaction with the hydroxyl on the surface of the boron nitride nano-sheets, and the remainingother isocyanate group endows the boron nitride nano-sheets with high dispersity and chemical activity. According to the invention, the agglomeration problem of boron nitride nano-sheets in an organicsolvent and a resin matrix can be solved, and a covalent interface can be formed between boron nitride nano-sheets and a resin matrix, so the compatibility is improved, and large-scale production andpractical application of boron nitride nano-sheets are facilitated.

The invention provides a distributed energy system based on fuel cell using liquefied natural gas as raw material, which comprises a solid oxide fuel cell subsystem, a steam injection gas turbine subsystem and a liquefied natural gas refrigeration subsystem. An outlet of the fuel compressor is communicated with an inlet of the preformer and an inlet of the combustion chamber respectively; An outlet of the aftercombustion chamber is communicated with an inlet of the combustion chamber; An outlet of the combustion chamber communicates with an inlet of the gas turbine; The heat medium inlet of the waste heat boiler is communicated with the outlet of the gas turbine through the preheater, the heat medium outlet is communicated with the inlet of the first heat release passage of the first condenser, and the cold medium outlet is communicated with the inlet of the combustion chamber. An inlet of the first endothermic passage of the first condenser is in communication with the LNG satellite station, and an outlet of the first endothermic passage is in communication with an inlet of the fuel compressor. The distributed energy system provided by the invention not only optimizes the energy structure but also saves energy and environmental protection, and has important guiding significance for the rational utilization of the energy of the LNG satellite station in China.

The invention discloses a preparation method and an electrochemical catalysis application of a metal nanoparticle-foamy carbon catalyst. The preparation method comprises the following steps: (1) a polymerizable vinyl monomer is adopted as an oil phase, a metal precursor-containing water solution is adopted as a water phase, functional polymer nanoparticles are adopted as an emulsifier, and a stable high-internal-phase Pickering emulsion is prepared; (2) the oil phase is polymerized and the internal phase is removed with a radical polymerization method, such that a polymerized high-internal-phase foam material is obtained; (3) the metal ion precursor in the polymerized high-internal-phase foam is reduced into metal nanoparticles, such that a metal nanoparticle-polymer form hybrid material is obtained; (4) high-temperature calcination is further carried out under a nitrogen atmosphere, such that a metal nanoparticle-foamy carbon hybrid material is obtained; and (5) the above material is loaded on a clean glassy carbon electrode, and electrochemical catalytic application can be carried out. The metal nanoparticle-foamy carbon catalyst preparation method has the advantages of simple process and low equipment requirement. The obtained material has good conductivity and large specific surface area. The material has a good catalytic effect in the aspect of electrochemistry.

The invention provides a resource utilization method for red gypsum produced by means of a sulfuric acid process of a titanium dioxide factory. The method is characterized in that the red gypsum produced by means of the sulfuric acid process of the titanium dioxide factory serves as a raw material, magnesium oxychloride cement is combined to modify and prepare a wall body material. The characteristics of gelatinization and high strength of the magnesium oxychloride cement are utilized, and the red gypsum is added to be modified so as to achieve resource utilization of the red gypsum and eliminate environmental hidden danger. A main ingredient of the red gypsum is calcium sulphate dehydrate. In addition, the content of impurities including iron, aluminum, silicon and the like is high, density degree of products can be improved by adding the magnesium oxychloride cement in preparation, and further abrasive resistance and strength of the products are improved. Good water-resistance effect can be obtained. The wall body material prepared by the red gypsum produced by means of the sulfuric acid process of the titanium dioxide factory is not intervened by strong acid and strong base, needs normal pressure and temperature and has not high requirements for device materials. The utilization rate of the raw material is high, the process flow is simple, and the method is a novel red gypsum resource utilization method.

The invention provides a method for preparing a carbon nanotube packaged paraffin phase-change material. the preparation method comprises the following steps: mixing oleylamine and paraffin, stirring to obtain an oleylamine/paraffin binary mixture, adding carbon nanotube, carrying out ultrasonic dispersion to obtain a reaction mixture, heating the reaction mixture to 220-230 DEG C, stirring at the stirring speed of 600-1000 r/m for 2-3 h, naturally cooling the reaction mixture to room temperature, adding n-hexane, carrying out ultrasonic dispersion, centrifuging, and drying to obtain the carbon nanotube packaged paraffin phase-change material. Under high-speed stirring, oleylamine modified molten liquid paraffin enters the inner cavity of the carbon nanotube through continuous self-diffusion, and there is no need to add toxic chemical reagents such as benzene, hydrazine hydrate, etc. The preparation technology is green and environmentally friendly; operation is simple; and cost is low.

The invention relates to a high-electric-field-resistant high-energy-density barium titanate-based relaxor ferroelectric ceramic material and a preparation method thereof, belonging to the technical field of capacitor material preparation. The chemical composition of the barium titanate-based relaxor ferroelectric ceramic material with high electric field resistance and high energy storage densityis 0.65 (Ba<0.98>Li<0.04>) Ti<0.98>O<3>-0.35 (Sr<0.7>Bi<0.2>)TiO<3>, and the barium titanate-based relaxor ferroelectric ceramic material with high electric field resistance and high energy storage density can resist a high electric field at room temperature and has a total energy storage density of 3.43 J/cm<3> and an effective energy storage density of 2.43 J/cm<3> at room temperature in an electric field with a density of 340 kV/cm; the energy storage efficiency of the material between 10 kV/cm and 340 kV/cm is larger than 70%; and the materials is prepared through solid-phase synthesis ata low temperature and has a high dielectric constant and a low sintering temperature, and the preparation method is easy to operate, low in equipment requirement, easily controllable in reaction conditions and good in repeatability.

The invention relates to a high-strength heat-resistant cast aluminum-copper alloy with the low porosity and a preparation process. According to the alloy, the higher Ti and B contents, the high V content and the low Zr content are adopted, and the Zr/V ratio is controlled to be less than or equal to 0.625, so that Zr, Ti and B are synergized to refine grains, the interdendritic hole formation iscontrolled, and the heat cracking resistance of V cannot be reduced due to Zr. Meanwhile, during raw material preparation, tool preparation and smelting processes, on the basis of adopting a high-purity argon and intense agitation combination H-removal process measure, through adding trace of rare earth element RE, the content of the melt H is further reduced, the formation of high-strength heat-resistant cast aluminum-copper alloy casting blow holes and pin holes is controlled, and the performance of a large-scale casting body is improved. The preparation process comprises the steps of smelting and casting the alloy, and carrying out solution and aging treatment on the casting. The high-strength heat-resistant cast aluminum-copper alloy with the low porosity provided by the invention canbe used for preparing the large-scale aluminum-copper alloy casting with the low porosity, a dense structure and no heat cracking, and the casting has favorable mechanical property, heat resistance and cutting processability.