387results about How to "Controllable parameters" patented technology

The invention relates to a perovskite solar cell and a preparation method thereof. The perovskite solar cell is composed of an FTO glass substrate, a sandwich structure TiO2 / ZnO / TiO2 compact layer, a TiO2 mesoporous / perovskite structure material active light absorption layer, a spiro-OMeTAD hole transferring layer and a gold electrode. Compared with the prior art, the sandwich structure TiO2 / ZnO / TiO2 compact layer combines with the advantages and disadvantages of TiO2 and ZnO, so that fill factors of the perovskite solar cell are improved to 70%, and the photoelectric conversion efficiency reaches 12.6%. Equipment for preparing the perovskite solar cell is simple, the preparing process is simple, control is easy, the cost is low, and the perovskite solar cell has a very good industrial application prospect.

The invention discloses an arc plasma torch preparing nanometer charcoal fibrous material method, which comprises the following steps: placing untreated leavings of liquefying coal directly in direct current arc plasma torch to carry on heat-treatment; using nitrogen for arc working gas under atmosphere pressure; getting nanometer charcoal fibrous material after 120-175 seconds, wherein there is no need to add in any activators in preparing process. The method is characterized by the following: the craft route is simple; the raw material is the waste of coal hydrogenant liquefaction craft; it's a good way to use coal liquification leavings to prepare high-added value, functional carbon material; the nanometer charcoal fibrous material can be used for accelerating agent, catalyst carrier, lithium ion secondary cell anode material, double-layer capacitor electrode, highly effective active solid, release agent and construction reinforced materials.

The present invention relates to chemical industry technology. The preparation of nanometer cobaltosic oxide powder includes purifying material, cobalt salt deposition, solid-liquid separation and solid calcination. Cobalt sheet is dissolved in nitric acid while being heated and high purity water is added to regulate solution density and pH value so as to obtain cobalt nitrate solution of 1.5-1.65 g / cu cm density and pH 4-5; ammonium bicarbonate suspension in 14-30 wt% is prepared with ammonium bicarbonate and water; cobalt nitrate solution is added into the suspension slowly to result in weight ratio of carbonate radical to cobalt ion being 2.4-2.6; and the wet cobalt carbonate material is heated to 300-450 deg.c for 3-6 hr to obtain black Co3O4 powder.

The invention discloses a method and a device for removing organic matters from water by using double-pool double-effect visible light in response to a photo-electro-Fenton reaction. The device comprises a cathode pool, an anode pool, a saturated potassium chloride (KCl) salt bridge, a visible light response semiconductor membrane material anode, a carbon-iron composite material oxygen negative electrode, an air pump, a magnetic stirrer, a direct current stabilized voltage power supply and a visible light source, wherein an anode performs photoelectrocatalysis under the actions of visible light and anode bias voltage to remove organic pollutants from water; the carbon-iron composite material oxygen negative electrode performs cathode potential reduction on O2 under the conditions of external voltage and introduced air to produce hydrogen peroxide which is subjected to an electric Fenton reaction to generate active substances such as hydroxyl radicals and the like capable of effectively removing the organic matters from the water; electrons produced by a photoanode migrate towards an oxygen cathode under the action of anode bias voltage; the O2 is reduced by the electrons on the cathode to generate more H2O2; and the H2O2 produced on the cathode cannot migrate to the anode pool for consumption, so that higher H2O2 concentration is ensured, and the oxidation reaction of the organic matters by electric Fenton is ensured. The method and the device are suitable for treating various types of organic waste water.

The method for preparing nanometer carbon fiber / foam coal through taking coal liquefaction residues as raw materials belongs to the scientific and technological field of coal materials of the scientific and technological branch of inorganic non-metallic materials. The method takes the coal liquefaction residues as the coal source of the foam coal, and compounds metallic / foam coal compound materials through the supercritical foaming method or the formwork method, and prepares the nanometer carbon fiber / foam coal compound materials through the chemical vapor deposition of organic matter. The method fully utilizes the characteristics of metallic accelerating agent containing abundant coal organic matter, iron-contained compound and the like in the coal liquefaction residues, and prepares metallic / foam coal compound materials, and the nanometer carbon fiber completely covers on the surface of the foam coal after the chemical vapor deposition. The novel nanometer carbon fiber / foam compound materials have the structural characteristics of solid foam and hollow nanometer carbon fiber. And the method is expected to be used in the fields of catalyzer and a catalyzer carrier, a fuel battery electrode material, high-effective sorbent of a fixed bed reactor and the like.

The invention provides a method for preparing hydroxymethylfurfural by saccharide at low temperature and normal pressure. The method comprises the following steps: mixing a saccharide raw material and a reaction solvent in a mass ratio of 1:3-50; heating the mixed solvent to a temperature of between 100 and 180 DEG C; adding a catalyst which is 0.01 to 2 percent of the mass of the solvent; reacting in an atmosphere of inert gas protection for 30 minutes to 10 hours; cooling a reaction system; extracting the hydroxymethylfurfural by an organic solvent, and generating the hydroxymethylfurfural by reaction; drying the hydroxymethylfurfural by distillation; and crystallizing the hydroxymethylfurfural to obtain the product. The method has the advantages of high selectivity, high yield, and low cost.

The invention discloses a process for hypercritical extraction of grape seed oil and resin adsorption abstraction of proanthocyanidin, which comprises, employing hypercritical carbon dioxide to extract grape seed oil from comminuted grape seeds under abstraction pressure of 20-35MPa at 40-50 deg. C, heating degreased grape seeds with 25-35% water solution of ethanol for backflow, charging 50-70% ethanol or isopropanol solution into the concentrated extract liquid, agitating and stewing, decompressing and filtering, thus obtaining proanthocyanidin crude extract liquid, then adsorbing with polystyrene resin, carrying out desorption with desorbent after adsorption saturation, drying the eluent under reduced pressure, finally obtaining refined proanthocyanidin product.

The invention discloses an extracting device and an extracting method for zanthoxylum oil and is characterized in that an oil joint (3) at the left upper end of a low temperature refluxing extracting device (16) is connected with a plant oil heater by a first oil transportation pump(2); the right upper end is connected with a spiral propeller (4); a slag outlet (8) at the left side of the low temperature refluxing extracting device is connected with a squeezer (9); the oil outlet of the squeezer after being jointed with the oil outlet (15) of the low temperature refluxing extracting device is connected with a filter (10); the filter is connected with a clarifying pool (12) by a second oil transportation pump(11); the clarifying pool is connected with a filling machine (14)by a third oil transportation pump(13). The materials are added according to a mass ratio that the ratio of plant oil to zanthoxylum is 2:0.5 to 1. The plant oil is added into a heater (1) to pre-heat to be 80 to 90 DEG C; the zanthoxylum is added into a cracker (6) for being crashed to 20 to 40 meshes; the materials are respectively and continuously fed into the low temperature refluxing extracting device (16) at the two ends; the temperature in the low temperature refluxing extracting device (16) is maintained between 80 to 90 DEG C. The left side of the low temperature refluxing extracting device (16) is for fueling and discharges the slag; the right side is for feeding and discharges the oil to obtain the fished product of the zanthoxylum oil.

The invention relates to a method for preparing negative pole material SnS2 of a lithium ion battery, belonging to the technical field of chemical electrode material manufacturing technique. The method comprises: thioacetamide is added into the mixed solvent of alcohol and water, pentahydrate stannic chloride is dissolved in concentrated hydrochloric acid, and then the mixed solution of the thioacetamide and the mixed solution of the pentahydrate stannic chloride are mixed together to obtain new mixed solution; the new mixed solution is added into a self-boost reaction kettle and sealed; after the reaction, the reaction kettle is taken out and naturally cooled to have room temperature; turbid liquid containing yellow precipitation is leached, washed and dried, so that the SnS2 material can be obtained. The method has simple and easy preparation technique, easily controlled parameters, high phase purity of the obtained SnS2 material, good appearance structure and uniform distribution; the application of the negative pole material of the lithium ion battery shows high charge-discharge ratio capacity.

A method for preparing carbon-coated composite nanoparticle by heat treatment using a gas carbon source belongs to the field of carbon-related nanomaterial preparation technology. The invention is characterized in that metal, alloy and ceramic nanoparticles are subjected to surface carbon coating. Heat treatment is carried out in carbon-rich atmosphere, and the gas carbon source is decomposed to achieve deposition, nucleation, growth and crystallization of carbon atoms on the surface of the nanoparticles, thus forming a nanostructure coated with a plurality of carbon layers. The thickness of the carbon coating layer on the surface of the nanoparticles as well as the output ratio of the carbon-coated nanoparticles to carbon nanotubes produced in the processed product can be controlled by properly selecting the type of carbon-rich gas, the pressure, the heat treatment temperature as well as the gas flow rate while dynamic processing. The invention has the advantages that the method has low requirement for a vacuum, gas charging / discharging and heating device by adopting a conventional vacuum processing furnace and has easily-controlled parameters, and scale production can be easily achieved.

The invention belongs to the technical field of flexible conductive fibers for wearable electronic devices and preparation thereof, specifically relates to a conductive coaxial nanofiber with a sheath-core structure of an aramid fiber or a polyamide fiber coating a reduced graphene oxide and a preparation method thereof, and provides a preparation method of a conductive fiber with a sheath-core structure. The preparation method of the conductive fiber with the sheath-core structure comprises the steps that (1), a core layer spinning solution is prepared; (2) a sheath layer spinning solution isprepared; (3) a coaxial fiber is prepared; and (4), high-temperature thermal reduction is conducted, specifically, the coaxial fiber obtained in the step (3) is subjected to the high-temperature thermal reduction to obtain a conductive coaxial nanofiber, that is, the conductive fiber with the sheath-core structure. According to the preparation method of the conductive fiber with the sheath-core structure, graphene oxide is used as the core layer material, and the high temperature resistant wet spinning polymer is used as the sheath layer material, thus reduction of the core layer graphene oxide through the high temperature thermal reduction can be realized, so that the obtained fiber has flexibility and also has the excellent electrical and mechanical properties.

The invention relates to a preparation method of a PVDF (polyvinylidene fluoride) pore membrane material used for a lithium-ion battery separator. With adoption of an NIPS (nonsolvent-induced phase separation) method, PVDF, HDPE (high-density polyethylene), PSF (polysulfone) and PVP (polyvinyl pyrrolidone) are proportionally mixed, heated and dissolved in a solvent, and a casting solution is obtained; the casting solution form a basic membrane through tape casting, the obtained basic membrane is immersed into deionized water or an organic solventnormal hexane, cyclohexane, absolute ethyl alcohol, methyl alcoholtoluene or xylene, the solvent in the separator is removed, vacuum drying is performed, and the separator is formed. The method has a simple process, parameters are easy to control, and compared with an ordinary commercial separator, physical properties of wettability, mechanical property, ionic conductivity and the like as well as electrochemical properties of electrochemical stability, rate capability and the like of the prepared PVDF mixture lithium-ion battery separator are greatly improved.

The invention provides a method for preparing a naphthalene series water reducer. The method comprises the following steps: sulfonation: carrying out a sulfonation reaction of naphthalene and concentrated sulfuric acid; hydrolysis: adding water into the sulfonation reaction product for hydrolysis, and hydrolyzing a by-product in the sulfonation reaction; condensation: adding poly formaldehyde and water into the hydrolysis reaction product for condensation; and neutralization: adjusting pH of the condensation reaction product to be 6-8, and drying to obtain the naphthalene series water reducer. The preparation method has the advantages of simple and stable production process and easily controlled parameters, and the prepared naphthalene series water reducer product has stable performance and good quality.

The invention provides a silicone oil-containing hair conditioner good in stability, comprising silicone oil, an emulsifier, a conditioning agent, a thickener, additives and deionized water. The emulsifier is a polymer having a molecular weight of 1000 to 5000 thousands and obtained by inverse emulsion polymerization of methacryloyloxyethyl trimethyl ammonium chloride and docosyl acrylate; the conditioning agent comprises polyquaternium and a small-molecular cationic surfactant; the thickener is a fatty alcohol; the additives include a preservative and a pH regulator; the components in percent weight in the conditioner are: the silicone oil 0.1-30.0%, the high-molecular emulsifier 0.5-4.0%, the polyquaternium 0.5-10%, the small-molecular cationic surfactant 0.1-8.0%, the fatty alcohol 0.5-10.0%, the preservative 0.1-0.3%, and the pH regulator 0.1-0.25%. The silicone oil-containing hair conditioner has a reasonable formula, a paste of the conditioner never thickens or bleeds during low-temperature storage, the conditioner can neutralize negative charge of shampoo remaining in hair, can smoothen the tangly hair and enable the hair to be easily combed, can impart gloss and smoothness to the air. The invention also provides a preparation method of the silicone oil-containing hair conditioner.

The invention relates to a method for preparation of high specific surface area activated carbon from carbon-rich residue obtained from high temperature coal tar or coal tar pitch. The carbon-rich residue mainly comprises quinoline insolubles and toluene insolubles removed from high temperature coal tar or coal tar pitch. The method includes subjecting the carbon-rich residue to pre-oxidation, grinding, dipping, drying, carbonization, activation and other processes so as to prepare an activated carbon material with a high specific surface area and a large pore volume. The invention provides a high value-added application method for the residue mainly composed of the quinoline insolubles and toluene insolubles removed from high temperature coal tar or coal tar pitch. The obtained high specific surface area activated carbon can be used in environmental protection, food processing, fine chemicals, medicines, supercapacitors and other fields.

The invention relates to a method for preparing a porous carbon born nano ferrite wave-absorbing material, comprising the following two main processes: firstly, preparing the mixture of porous carbon materials and dry gel; and secondly, calcining the obtained mixture of porous carbon materials and dry gel under the nitrogen atmosphere, wherein calcination comprises the following steps: placing the dried mixture of porous carbon materials and dry gel into a porcelain boat; arranging the porcelain boat at the center of a quartz tube in a horizontal reacting furnace, raising the temperature of the reacting furnace to 600-650 DEG C under the nitrogen atmosphere, and holding the temperature for one hour; reducing the temperature of a reaction tube to the room temperature through cooling under the protection of nitrogen after reaction; and obtaining the products in the porcelain boat, namely the novel porous carbon born ferrite wave-absorbing material. According to the method, the enlargement of crystallization of ferrite particles and the soft agglomeration of nano ferrite can be avoided by utilizing the special characteristics and functions of the pore structure of the porous carbon material; and the porous carbon born ferrite is firmer and hard to fall.

The invention provides an alkali reverse osmosis membrane cleaning agent, which comprises an ethylene diamine tetraacetic acid tetrasodium salt solution or a sodium dodecyl benzene sulfonate solution or a trimeric sodium phosphate solution, of which the concentration is between 1 and 4 percent and the pH value is between 10 and 12. The cleaning agent adopts common chemicals, so that the cleaning agent has low price and simple formula, and materials of the cleaning agent are available. The invention also provides a method for on-line chemical cleaning of the reverse osmosis membrane, by alternately using an acid reverse osmosis membrane cleaning agent and the alkali reverse osmosis membrane cleaning agent for on-line cleaning of the reverse osmosis membrane, the reverse osmosis membrane can be easily and effectively cleaned, and the cleaning effect is quite obvious; moreover, the technical process can also is easy to control.

The invention discloses a high-conductivity graphene and a graphene conducting film, and a preparation method thereof, belonging to the field of materials. The method comprises the following steps: carrying out blending and mechanical grinding on preoxidized graphite powder prepared by a concentrated acid oxidization process and disazo dyes to prepare the high-conductivity graphene; and dispersing the high-conductivity graphene in a solvent, forming a graphene film on a substrate surface by a film-forming process, and forming the graphene conducting film from the graphene film by a surface treatment process. The preparation method has the advantages of simpleness, mild preparation conditions, controllable technological parameters, high yield and low production cost. The high-conductivity graphene has the advantages of high solvent dispersivity, high stripping efficiency, favorable film-forming property and favorable conductivity; and the graphene conducting film has the advantages of low resistance, wide substrate applicability, favorable mechanical properties and high biocompatibility, and has wide application prospects in the fields of lithium ion batteries, solar cells, super capacitors, electromagnetic shielding, antistatic, biosensing, low-cost light-permeable electrodes and the like.

The invention discloses a method for preparing carbon coated hexagonal boron nitride. The method is characterized in that boric acid and urea are used as raw materials to prepare hexagonal boron nitride, maleic anhydride ethylene octylene graft copolymers are used as a carbon source, the carbon coated hexagonal boron nitride with a core-shell structure is obtained by the aid of steps of stirring,extracting, leaching, drying and carbonizing at high temperature, wherein, a core is the hexagonal boron nitride, and carbon is a shell. When the method is used for preparing carbon coated hexagonal boron nitride, the raw materials are available easily, prices of the raw materials are cheap, inclusive compound of the hexagonal boron nitride has the core-shell structure, the hexagonal boron nitride is the core, the carbon is the shell, sizes of products are uniform, specific surface areas are large, and the products have excellent dispersibility when added to base oil or high-polymer resin, and still have an excellent mechanical performance and excellent abrasion resistance when in extreme environments with high temperature and high pressure.

The invention discloses a method for powder metallurgy preparation of a self-lubricating bearing material, belonging to the field of lubricating materials. According to the method, a traditional powder metallurgy method is adopted, and the method comprises the following steps of: mixing and annealing iron powder with an appropriate amount of iron sulfide, ferromanganese powder and alloy powder; mixing the annealed powder with an appropriate amount of graphite; pressing and sintering to obtain the self-lubricating bearing material. The raw materials are inexpensive, the process is simple, the parameters are easy to control, and the production process is safe and environment-friendly, so that the method is suitable for large-scale industrial production. In the annealing process, the mixed powder reacts to generate FeS and MnS, and good lubricating and antifriction effects are achieved; meanwhile, the existence of MnS can significantly improve the cutting performance of the bearing material and reduce the abrasion of a cutter. The self-lubricating bearing material prepared by the method disclosed by the invention can be widely applied to mechanical equipment for iron and steel, metallurgy, energy sources and the like, and is particularly suitable for occasions requiring oil-free lubrication.

The invention discloses a solid lubricating oil additive MoSe2 nanosheet and a preparation method thereof. Molybdenum powder and selenium powder are used as main raw materials to directly prepare the solid lubricating oil additive MoSe2 nanosheet through one-step solid phase reaction. The method of the invention has the advantages of easy acquisition of raw materials, low cost of raw materials, simple preparation technology, easy control of parameters and safe and environment-friendly production processes, and is especially suitable for large-scale industrial production. The solid lubricating oil additive MoSe2 nanosheet prepared by the method of the invention has the advantages of good crystallization, high purity and excellent lubricating property.

The invention discloses a copper-based electric contact material containing graphene / molybdenum disulfide heterojunctions and a preparation method of the copper-based electric contact material and belongs to the technical field of metal matrix self-lubricating materials. Firstly, graphene serves as the base, sodium molybdate serves as a molybdenum source, thiourea serves as a sulfur source, hydroxylamine hydrochloride serves as a reduction agent, cetyltrimethyl ammonium bromide (CTAB) serves as a surface active agent, and a graphene / molybdenum disulfide heterojunction material is compounded through a hydrothermal method according to a certain proportion; and then copper powder serves as a matrix, and through the matching with heterojunction materials of different proportions, the copper-based electric contact material is obtained by means of a powder metallurgy technique through mixing, cold pressing and vacuum sintering. According to the copper-based electric contact material containing graphene / molybdenum disulfide heterojunctions and the preparation method of the copper-based electric contact material, the excellent mechanical properties and electrical properties of graphene as well as the characteristic of small density are utilized, through the cooperation of the excellent lubricating property of molybdenum disulfide, the hardness and the lubricating property of the material are improved while guaranteeing the conductivity of the composite material, and the specific gravity of the material is reduced; and in addition, the technique is simple, the cost is low, and the obtained composite material has great development prospects in the aspect of self-lubricating electric contact.

The invention provides a bonding silver alloy wire for a semiconductor, and a manufacturing method thereof. The performance of the silver alloy wire material is improved through injection of certain amount of hydrogen into palladium-contained silver wire and combination of an alloy technology and a wire stretching technology, the vulcanization and oxidization resistant ability of the wire is improved, and the bonded area and the bonding strength under N2 atmosphere in ball bonding are improved, so that the electric conducting ability and the reliability of the wire are improved.

A preparation method of a foaming ordered mesoporous carbon integral material with a graded tunnel structure belongs to the technical field of inorganic nonmetal carbon material. According to the invention, a powdered ordered mesoporous silicon material is used as a template, and furfuryl alcohol is used as a carbon source; the carbon source is introduced into a tunnel of the ordered mesoporous silicon material, treated with thermalpolymerization under catalysis of oxalic acid and charred into a silicon carbon composite material; and silicon template is washed out by hydrofluoric acid, so as to obtain the foaming ordered mesoporous carbon integral material. The integral material with a graded tunnel structure has a highly open macroporous cell structure, an ordered and even-size mesoporous structure; and a pore structure, density and intensity of the foaming integral composite material can be easily adjusted. A preparation process is simple; equipment requirement is not high; parameters are easily to control; operations are easy and are apt to be amplified. The material can be applied to fields of absorption material, cell substrate and fixed bed filling material, etc.

The invention relates to a ZnO / CdSe / CdTe nanorod array photoelectrode of a solar cell and a preparation method for the ZnO / CdSe / CdTe nanorod array photoelectrode. The ZnO / CdSe / CdTe nanorod array photoelectrode consists of an ITO conductive glass substrate, a ZnO buffer thin film layer, a ZnO nanorod array layer, a CdSe shell and a CdTe quantum dot layer from inside to outside. Due to a CdSe and CdTe sensitization technology, the saturated photo-current density of the ZnO / CdSe / CdTe nanorod array photoelectrode is increased to 14.3 mA / cm<2>. The preparation process is simple and feasible, low in cost and high in yield, and has an excellent market application prospect.

The invention discloses a giant salamander feed, which belongs to the technical field of aquaculture . The technical point of the giant salamander feed is that the giant salamander feed consists of soy protein concentrate, cottonseed cakes, meat and bone powder, bran, rice bran, vegetable oil, vitamins, amino acid, spermatogenic powder, mycotoxin adsorbent and monocalcium phosphate. The content and components of protein in the soy protein concentrate, the cottonseed cakes and the meat and bone powder in the feed formula are suitable for the growth and development of giant salamanders, the sources of the materials are wide, the giant salamander feed is environment-friendly, and the addition of the mycotoxin adsorbent enhances the immunity and resistance of the animal, decreases the incidence of induced diseases, and increases the growth speed of the giant salamanders; the incidence of enteritis is decreased in the process of culture; the shelf life of the feed is prolonged, and the feed is not deteriorated yet after being stored for 18 months. The process of a method for preparing the giant salamander feed is simple, parameters are easy to control, and the giant salamander feed is suitable for industrialization.

The invention discloses a photoetching rework photoresist removing technology which comprises the steps of: providing a wafer to be treated by photoetching rework; photoetching the surface of the wafer for a first time to produce residual photoresist; using a photoetching machine which can generate a light beam capable of enabling the photoresist to be in complete photochemical reaction to expose the surface of the whole wafer; and developing the surface of the exposed wafer, and removing the photoresist. According to the technology, plasma dry ashing does not need to be utilized, high-temperature manufacture procedure does not exist, and chemical liquid with strong oxidizing property or acidity is not needed, so that a film on the surface of the wafer is not damaged or modified. The technology is simple and less in material consumption, improves the stability and the manufacturing performance of the whole manufacturing process flow, and adds the limitation for the maximum photoetching rework times, thus providing high technical fault tolerance for research, development and mass production.

The invention provides a polyamide reverse osmosis membrane and a preparation method thereof. The membrane comprises a porous support membrane and a carbon quantum dot-containing polyamide layer growing on the surface of the porous support membrane, and the carbon quantum dot-containing polyamide layer comprises the following raw material components: aminated carbon quantum dots, an oil-phase reaction monomer, an oil-phase solvent, an acid acceptor, a pH regulator and a surfactant; the preparation method comprises the following steps: 1, preparing aminated carbon quantum dots; and 2, preparingthe polyamide reverse osmosis membrane. According to the polyamide reverse osmosis membrane disclosed by the invention, the aminated carbon quantum dots are used as a novel water-phase reaction monomer, and a polyamide layer structure containing the carbon quantum dots is formed on the polysulfone porous support membrane by directly carrying out a cross-linking reaction on amino groups on the aminated carbon quantum dots and trimesoyl chloride, so that the water flux can be improved from multiple aspects.

The invention discloses a preparation method for sphere-like tungsten powder, and belongs to the field of powder preparation. The preparation method comprises the steps as follows: shaping granular tungsten oxide powder, screening, reducing the shaped tungsten oxide powder in a reducing atmosphere, and cooling to obtain the sphere-like tungsten powder. The production technology for the sphere-like tungsten powder is greatly simplified, and the preparation method has the characteristics of simple process, high production efficiency, short cycle, low production cost and the like.

The invention discloses a preparation method of a tungsten diselenide nano-clathrate. The preparation method is as follows: tungsten powder and selenium powder which are in a certain molar ratio and graphite are used, absolute alcohol is added to prepare raw material mixture, the mixture is processed to form paste, and the paste performs solid-phase synthesis under a certain condition to obtain the tungsten diselenide nano-clathrate with a core-shell structure. The product has uniform size and large specific surface area; the product still has good mechanical properties and wear resistance under extreme conditions such as high temperature and high pressure and has good dispersibility in macromolecular composite and other composites; and the product is a lubricating material with good performance, has simple preparation process, controllable parameters and safe and environmentally friendly production process and is particularly suitable for large-scale industrial production.