38 results about "Inorganic solvent" patented technology

The invention discloses a silicon nitride ceramic material and a preparation method and application thereof, and the preparation method of the silicon nitride ceramic material comprises the following steps: providing slurry which comprises a silicon-containing raw material; the silicon-containing raw material comprises silicon powder, an inhibitor and an inorganic solvent in a mass ratio of 100: (0.1-10): (10-100), and the inhibitor comprises one or more of an alcohol compound, organic acid, methyl silicone oil and a silane coupling agent; preparing a green body from the slurry; and the green body is subjected to nitriding treatment and sintering treatment in sequence. The silicon powder is used as a main source of a silicon element, and hydrogen in hydroxyl in the inhibitor is connected with oxygen in silicon dioxide formed on the surface of the silicon powder due to oxidation to form a hydrogen bond, so that the surface of the silicon powder is coated with the inhibitor to form a complex for modification, and continuous hydrolysis of the silicon powder in an inorganic solvent such as water is inhibited; and the silicon nitride ceramic material with few impurities is obtained by matching nitriding treatment and sintering treatment, so that the thermal conductivity is improved.

The invention discloses a preparation method of an anti-solvent extrusion granulation aluminum adsorbent. The preparation method comprises the following steps: preparing aluminum adsorbent precursor powder; dissolving an organic polymer in an organic solvent to form a polymer solution; dissolving the aluminum adsorbent precursor powder in the polymer solution to form slurry; and dripping the slurry into a flowing inorganic solvent so as to form the aluminum-based adsorbent particles through curing. The method has the advantages of simple preparation process, high adsorption capacity, high adsorption rate, stability, reliability, reusability and the like, can be directly used for extracting Li < + > from original brine in the technical field of lithium extraction from liquid-phase salt lakes, and has very high practical application value and popularization value.

The present invention discloses a sodium-doped nanozyme and its preparation method and application, belonging to the technical field of antibacterial new nanomaterials. The nanozyme is prepared by mixing a sodium ion salt with vitamin C and L-alanyl-L-glutamate in an inorganic solvent to form a precursor solution, followed by treatment with a one-pot hydrothermal method and then cooling, and drying to obtain the sodium-doped nanozyme. The molar ratio of sodium element : nitrogen element : carbon element in the precursor raw materials is 1 : (2 - 120) : (10 - 500). The treatment temperature of the one-pot hydrothermal method is 100°C - 300°C. The nanozyme uses sodium as the doping metal and sodium salts such as sodium chloride as the sodium source raw material, and has the advantages of being green, safe, low-cost, and excellent antibacterial ability. Moreover, it is prepared by a simple one-step hydrothermal method, avoiding the use of expensive raw materials, effectively reducing the preparation cost of the nanozyme, and simplifying the preparation process. At the same time, since the nanozyme avoids the use of heavy metals and noble metals, it also avoids the potential safety risks associated with them.

The present application provides a lightweight nanoporous diamond and a preparation method thereof, the preparation method comprising: subjecting a carbon source and a metal to high temperature and high pressure treatment to convert the carbon source into diamond, then cooling and depressurizing the carbon source to room temperature and pressure to obtain a composite material of diamond and metal; soaking the composite material in an inorganic solvent to remove the metal, thereby obtaining a lightweight nanoporous diamond. The preparation method of the lightweight nanoporous diamond provided in the present application can achieve the regulation of the pore size, porosity and density of the lightweight nanoporous diamond, thereby obtaining a lightweight nanoporous diamond with a low pore size, high porosity and low density. At the same time, the obtained lightweight nanoporous diamond also has high hardness and good mechanical strength. In addition, the preparation method provided is simple and easy to operate, which is conducive to the mass production of lightweight nanoporous diamonds.

The application provides a purification method of crude palladium, and belongs to the technical field of precious metal purification. In the application, the precious metals such as palladium in the crude palladium are dissolved by aqua regia, then the palladium ions are oxidized into high-valence palladium by an oxidizing agent, and then the high-valence palladium is precipitated into palladium salt by a precipitating agent, so as to improve the purity; then the palladium salt is dissolved by an inorganic solvent, so as to remove the impurities such as platinum, copper, iron and silver, thereby improving the purity of the palladium; the palladium ions in the filtrate are complexed by a first complexing agent, so as to obtain a sub-palladium salt precipitate, thereby removing the impurities and improving the purity of the palladium; then the palladium ions are further complexed by a second complexing agent, thereby further improving the purity of the palladium; and then electro-deposition is adopted, so as to ensure that the palladium ions are fully reduced into palladium powder, thereby improving the purity of the palladium. The experimental results show that the purity of the palladium powder obtained by the purification method is greater than or equal to 99.95%.

The present disclosure relates to an ester derivative prodrug of inotodiol and use thereof. The prodrug not only has increased solubility with respect to an inorganic solvent and an organic solvent, but also has improved stability, and thus can be used in the treatment of various inflammatory diseases, including inflammatory diseases or allergic diseases.

The invention belongs to the technical field of low-permeability reservoir oil recovery, and particularly relates to a method for improving the recovery efficiency of a low-permeability sandstone reservoir through P-Dots nano-composite fluid. The preparation method comprises the following steps: dissolving a conjugated polymer in an organic solvent to obtain a mixed solution, then adding an inorganic solvent into the mixed solution under an ultrasonic condition, and carrying out conjugated polymer self-assembly to obtain P-Dots nanoparticles; then dispersing the P-Dots nano-particles in water to prepare a P-Dots nano mother solution, and dissolving a zwitterionic surfactant in water to prepare a zwitterionic surfactant mother solution; dropwise adding the P-Dots nano mother liquor into the zwitterionic surfactant mother liquor under a stirring condition, and stirring after dropwise adding is finished, so as to prepare the nano fluid with the salt resistance. The nano-particles with the particle size of 20 nm prepared by the invention have smaller particle size, and after being prepared into nano-fluid with salt resistance, the nano-fluid is diluted, dissolved and dispersed before being used, the nano-fluid can better enter a reservoir pore space and fully act with a rock surface, so that the wettability of the reservoir is improved, the resistance of fluid flow can be reduced, and the stability of the fluid is improved. Therefore, the recovery efficiency of the low-permeability reservoir is improved.

The present invention relates to a liquid composition intended to be applied to the skin, the skin appendages or the mucous membranes, the composition containing at least two grades of hydroxypropyl cellulose, at least one of which has a molecular weight of at least 800,000 and the other of which has a molecular weight of less than 400,000, at least ethyl cellulose, at least one hydroxypropyl cellulose plasticiser, at least one ethyl cellulose plasticiser, at least one organic solvent and at least one inorganic solvent. Once applied to the skin, the skin appendages or the mucous membranes, the solvents evaporate and the composition forms a solid protective film on the skin, the skin appendages or the mucous membranes, which film can advantageously be used in the treatment of skin disorders, in particular acne.

Disclosed is a method for treating objects produced by an additive manufacturing process which have at least one surface formed from a polymer with a glass transition temperature of at least 120° C., and preferably are formed from such a polymer, and in which the surface of the object is brought into contact with an organic or inorganic solvent. By such a treatment, the surface of the objects can be smoothed and relevant mechanical properties can be improved. Further disclosed are three-dimensional objects produced according to such a method and to the use of organic or inorganic solvents to reduce the surface roughness and / or to improve the mechanical properties and / or the chemical resistance.

The invention provides a light nano-pore diamond and a preparation method thereof, the preparation method comprises the following steps: performing high-temperature and high-pressure treatment on a carbon source and metal to convert the carbon source into diamond, and then cooling and depressurizing to normal temperature and normal pressure to obtain a diamond and metal composite material; the composite material is soaked in an inorganic solvent to remove metal, and the light nano-pore diamond is obtained. According to the preparation method of the light nano-porous diamond, provided by the invention, the aperture, porosity and density of the light nano-porous diamond can be regulated and controlled, and the light nano-porous diamond with low aperture, high porosity and low density is obtained; and meanwhile, the prepared light nano-pore diamond also has relatively high hardness and relatively good mechanical strength. In addition, the provided preparation method is simple and easy to operate, and mass production of the light nano-pore diamond is facilitated.

The invention relates to the technical field of immunosensors, in particular to a CeO2-Pd NPs composite material, an immunosensor, a preparation method and application. The preparation method of the CeO2-Pd NPs composite material comprises the following steps: dissolving cerium salt and a polyvinylpyrrolidone solution in an organic solvent, adding an inorganic solvent, and carrying out a second heating reaction to obtain cerium dioxide; dissolving potassium salt, L-ascorbic acid and polyvinylpyrrolidone in an inorganic solvent, carrying out a third heating reaction, adding a palladium salt solution, and continuing the third heating reaction to obtain Pd NPs, namely palladium nanoparticles; the preparation method comprises the following steps: dispersing cerium dioxide in an inorganic solvent, and adding Pd NPs to obtain a CeO2-Pd NPs composite material; the invention also provides the CeO2-Pd NPs composite material prepared by the method, an immunosensor and a preparation method. The problem that an existing sensor is low in sensitivity when used for detecting DBP is solved.

An all-inorganic electrolyte formulation for use in a lithium-ion battery system comprising at least one of each a phosphoranimine, a phosphazene, a monomeric organophosphate and a supporting lithium salt. The electrolyte preferably has a melting point below 0° C., and a vapor pressure of combustible components at 60.6° C. sufficiently low to not produce a combustible mixture in air, e.g., less than 40 mmHg at 30° C. The phosphoranimine, phosphazene, and monomeric phosphorus compound preferably do not have any direct halogen-phosphorus bonds. A solid electrolyte interface layer formed by the electrolyte with an electrode is preferably thermally stable ≥80° C.

The invention relates to a method of producing a solution of a feedstock in organic or inorganic solvents. The method includes providing for contact between a feedstock and a solvent. The feedstock is placed in a perforated container. If the density of the solution is greater than the density of the solvent, a distance is provided from the bottom of the perforated container to the bottom of a vessel containing the solvent such that the height of the column of the solvent below the container allows the process of dissolution to take place. If the density of the solution is less than the density of the solvent, the container is immersed in the solvent such that the height of the column of the solvent above the container allows the process of dissolution to take place. The technical results include reducing energy expenditure, simplifying the process of producing a solution and also increasing the speed of dissolution.

The invention relates to the technical field of oil field recovery and carbon sequestration, and discloses a composition for preparing plugging gel, the plugging gel and a preparation method of the plugging gel. The composition contains a monomer combination, a modified nano material, an organic cross-linking agent, an initiator and an inorganic solvent, based on the total weight of the composition, the content of the monomer combination is 3-18 wt%, the content of the modified nano material is 0.1-5 wt%, the content of the organic cross-linking agent is 0.05-0.5 wt%, the content of the initiator is 0.05-0.5 wt%, and the content of the inorganic solvent is 76-96 wt%. The monomer combination contains an amide monomer, a sulfonic acid monomer and an acrylic acid monomer in a mass ratio of 1: (0.12-2.5): (0.25-2). By adopting the composition for preparing the plugging gel provided by the invention, the prepared plugging gel is high in mechanical strength and good in rheological property, and has good temperature resistance, salt resistance and CO2 resistance.

The present invention relates to a method for determining oxidation of coal, the method comprising: a) mixing a coal sample with an organic solvent and an inorganic solvent, to extract oxidised coal species from the coal sample into a liquid phase, and b) analysing the liquid phase from step (a) to determine a degree of coal oxidation. The inorganic solvent may comprise an inorganic compound such as a pyrophosphate. The present invention also relates to a method for controlling collector used in a coal flotation process, the method comprising determining a degree of oxidation of coal by the preceding method and controlling a ratio of non-polar collector to polar collector in the coal flotation process in response to the determined degree of oxidation of coal.

The utility model relates to a decorative wall body with a show wall plate. The decorative wall body comprises a keel frame and a show wall panel layer, the keel frame is arranged on a wall body, the keel frame comprises a keel along the top and a keel along the bottom, a plurality of transverse supporting keels and vertical keels are arranged between the keel along the top and the keel along the bottom, and the transverse supporting keels and the vertical keels are arranged in a criss-cross mode to form a grid shape. The wall-showing panel layer comprises a plurality of wall-showing plates which are laid on the other side, opposite to the wall body, of the keel frame, and each wall-showing plate is sequentially provided with a high-density fiber cement plate layer, a chemical bonding layer, an inorganic solvent layer, an inorganic facing layer, a plurality of inorganic additive layers and an environment-friendly weather-proof layer from inside to outside. The decorative wall body disclosed by the utility model has excellent waterproof, moisture-proof, mildew-proof, bacteria-proof and fireproof performances, and can be suitable for occasions with heavy water vapor, such as toilets, kitchens and the like.

The invention discloses an extraction method of laminarin. The method comprises the following steps: 1) pretreating wet kelp by adopting steam explosion, drying and crushing to obtain powder; 2) carrying out first extraction on the powder by adopting a first organic solvent, and carrying out solid-liquid separation to obtain a first precipitate; (3) carrying out secondary extraction on the first precipitate and an inorganic solvent, and carrying out solid-liquid separation to obtain supernate; 4, the supernate and a second organic solvent are subjected to third extraction and solid-liquid separation, a second precipitate is obtained, and the laminarin is obtained.By means of the extraction method, the extraction rate of the laminarin can be increased, the molecular weight of the laminarin can be reduced, and the uronic acid content can be increased.

The application relates to the field of materials, and discloses a solvent-resistant, oxidation-resistant and corrosion-resistant micro-fluidic chip and a simple preparation method and application thereof. The chip comprises a hydrophilic substrate and a hydrophobic pattern on the surface of the hydrophilic substrate, and the hydrophobic pattern is composed of a cross-linked and solidified product of a hydrophobic precursor. Compared with a micro-fluidic chip prepared from a traditional hydrophilic and hydrophobic patterned surface, the application can more effectively confine a liquid, can resist most organic and inorganic solvents, and can not be dissolved or have any swelling behavior when the chip is soaked in a solvent for a long time. Therefore, the application can greatly widen the application of the micro-fluidic chip in liquid drop microarray and extreme environment, the processing process of the application is relatively simple, the preparation efficiency is relatively high, and the application is very convenient for large-area preparation and industrial production of the solvent-resistant micro-fluidic chip.

The invention provides an ion exchange membrane and a preparation method thereof, a membrane electrode and application, and the preparation method of the ion exchange membrane comprises the following steps: S1, taking a template agent, and carrying out dispersion treatment in a first organic solvent to obtain a template agent dispersion liquid; s2, sequentially mixing the template agent dispersion liquid and the ion exchange resin solution, and heating to obtain an ion exchange membrane precursor; s3, etching the ion exchange membrane precursor in an inorganic solvent to obtain an ion exchange membrane; wherein the template agent is a two-dimensional inorganic sheet material, and the two-dimensional inorganic sheet material is selected from one or more of layered double hydroxides, vermiculite, montmorillonite or bentonite. The ion exchange membrane prepared by the method contains a two-dimensional continuous transmission channel, so that activation energy required by ion transmission can be reduced, an ion transmission path can be shortened, and the ion conductivity of the ion exchange membrane can be further improved.

The invention relates to the technical field of medicines, in particular to puerarin carbon dots as well as a synthesis method and application thereof. The puerarin carbon dots are synthesized by taking puerarin as a carbon source and m-phenylenediamine as a nitrogen source. The invention also provides a synthetic method of puerarin carbon dots, which comprises the following steps: dispersing puerarin in an inorganic solvent to obtain a solution A; dissolving m-phenylenediamine in an inorganic solvent to obtain a solution B; adding the solution B into the solution A, heating, reacting, cooling and filtering to obtain filtrate; and filtering the filtrate by using a filter membrane, dialyzing the filtrate, and freeze-drying to obtain the puerarin carbon dots. The invention further provides application of the puerarin carbon dots in preparation of a disease diagnosis and treatment integrated reagent. The invention solves the problems that the existing puerarin is poor in water solubility, low in bioavailability, weak in self-fluorescence and difficult to be used for biological imaging, and the existing puerarin is difficult to be directly used for a nano diagnosis and treatment system.

The invention relates to the technical field of water pollution control, in particular to a manganese-based composite material and a preparation method and application thereof. The manganese-based composite material comprises a manganese sesquioxide base material and acid radical ions bonded on the surface of the manganese sesquioxide base material. The invention also provides a preparation method of the manganese-based composite material, which comprises the following steps: dissolving an inorganic manganese salt in an inorganic solvent to obtain a solution A; dissolving oxalate in an inorganic solvent to obtain a solution B; adding the solution A into the solution B, carrying out stirring reaction, and carrying out solid-liquid separation to obtain a manganese oxalate precursor; and calcining the manganese oxalate precursor to obtain porous manganese sesquioxide, immersing the porous manganese sesquioxide into an ammonium salt solution, stirring at normal temperature, standing to obtain manganese sesquioxide impregnated with ammonium salt, and calcining to obtain the manganese-based composite material. The invention also provides an application of the manganese-based composite material prepared by the preparation method as a catalyst. The problem that the oxidative degradation capacity of periodate on organic pollutants is limited when periodate is directly used as an oxidizing agent is solved.

The invention discloses a method for preparing a core-shell structure catalyst and applying the core-shell structure catalyst to black phosphorus crystal preparation, and belongs to the field of material synthesis. The method specifically comprises the following steps: synthesizing a polymer-metal catalyst composite material in an inorganic solvent or an organic solvent, drying, placing red phosphorus, a core-shell structure catalyst and a transport agent at a raw material end according to a certain proportion, and carrying out high-temperature treatment to obtain the high-quality black phosphorus at a nucleation end. Wherein the core-shell structure catalyst takes a polymer as a shell layer and a metal-B as a core, compared with a pure catalyst, the polymer of the shell layer improves the reaction participation temperature of the catalyst, and B in the core further improves the reaction activity of the catalyst metal, so that the problem that the reaction participation temperature of each material in the heating stage is different when black phosphorus is amplified to be prepared to be more than 30kg of a system is solved; therefore, the problems that the materials are not fully contacted in the reaction process, the volatilization rate of the materials is low and the hardening condition is serious are solved. Through construction of the core-shell structure, the material volatilization rate of the raw material end can be further improved, and the black phosphorus crystal quality is improved.

The invention relates to a synthesis method of a sulfentrazone chloride intermediate. The method comprises the following steps: adding an intermediate A into a solvent, adding a catalyst, and stirring and mixing; the solvent is an inorganic solvent; the catalyst is ferric trichloride hexahydrate; slowly heating the mixture to 50-100 DEG C, adding a chlorination reagent, reacting for 1-10 hours, and keeping the temperature for 1 hour; the chlorination reagent is one of chlorine, liquid chlorine, thionyl chloride and sulfonyl chloride; separating out solid, filtering, washing a filter cake with dilute alkaline water, collecting to obtain a brown solid chloride intermediate B, drying in vacuum at 80 DEG C for 24 hours to obtain a product, and applying filtrate to the next batch. The method has the advantages that different chlorination reagents and different reaction solvents and catalysts are used in the chlorination reaction, reaction conditions are optimized, impurities are reduced, and higher reaction yield is obtained.

The invention relates to the technical field of metal-based composite materials, in particular to a multi-dimensional nanometer synergistic reinforced aluminum-based composite material and a preparation method thereof. The preparation method of the multi-dimensional nano synergistically reinforced aluminum-based composite material comprises the following steps: taking zero-dimensional zirconium oxide powder and two-dimensional graphene powder as reinforcing phases, and uniformly mixing the reinforcing phases with an inorganic solvent respectively to obtain a zirconium oxide suspension and a graphene suspension; the graphene turbid liquid and aluminum alloy powder are stirred at a high speed, and a first mixture is obtained; stirring the zirconium oxide suspension and the mixture I at a low speed and then at a medium speed to obtain a mixture II; and sequentially carrying out vacuum drying and drying on the obtained mixture II to obtain the composite powder. And the composite powder is formed through an SLM technology, and then the multi-dimensional nanometer synergistic reinforced aluminum-based composite material is prepared. The prepared aluminum-based composite material has high strength and high toughness, and can meet the requirements of key parts of aero-engine blades and spacecraft bearing bracket lamps.

A rotor for all systems for circulating various single-phase fluids or multiphase fluids, ranging from organic or inorganic solvents to CO2 in liquid or supercritical phase in cells connected to each other by passages, subjected to adjustable centrifugal acceleration and comprising precise temperature control for chemical or biochemical reactions and extraction, purification and separation reactions, and for use in chemical and biochemical reactors, this rotor is formed by one or more discs stacked one on top of the other, each disc being made of a circular sector (A3) comprising a circular half-sector (10) and a circular half-sector (11), each circular half-sector being the mirror image of the other with respect to the plane (28) of the circular half-sector (10) after the two circular half-sectors are assembled opposite each other in a sealed manner. When the half-sectors (10 and 11) are joined, the half-channels of the half-sectors with their respective junctions (18A and 19B) form a junction channel.

The invention provides ink for preparing a semiconductor film, the semiconductor film and a preparation method of the semiconductor film, and belongs to the field of semiconductors. The invention provides ink for preparing a semiconductor film. The ink comprises the following components: indium salt, polyethylene glycol, a surfactant and an inorganic solvent, the molecular weight of the polyethylene glycol ranges from 20000 to 50000, or the molecular weight of the polyethylene glycol ranges from 1000000 to 5000000; when the molecular weight of the polyethylene glycol is 20000-50000, the mass of the polyethylene glycol is 1% of the mass of the indium nitrate; and when the molecular weight of the polyethylene glycol is 1000000-5000000, the mass of the polyethylene glycol is 1-2% of the mass of the indium nitrate. A weak coordinate bond is formed by an ether oxygen group of PEG and In < 3 + >, hydrolytic agglomeration of indium salt is inhibited, the dispersed state and ordered structure of indium oxide nanocrystals are regulated and controlled, and the carrier mobility is improved by adjusting the molecular weight and dosage of polyethylene glycol.

The application discloses a composite electrolyte for inhibiting zinc dendrite and prolonging the cycle life of a battery and application thereof. The solvent of the composite electrolyte is a mixture of inorganic solvent and organic solvent, the volume ratio of the inorganic solvent to the organic solvent is 1 / 9-3 / 7, and the organic solvent is ethylene glycol methyl ether (MOE). The composite electrolyte provided by the application can destroy the original water solvation shell of zinc ions, adjust the deposition process of the zinc ions, and make the zinc ions tend to deposit on the (002) crystal surface. Thus, the occurrence of side reactions such as dendrite and hydrogen evolution is inhibited, and the service life of the aqueous zinc ion battery is prolonged, and the cycle stability is improved. In addition, the composite electrolyte provided by the application has low preparation cost, and provides a strategy for developing high-performance aqueous zinc ion batteries in the future.

The present invention provides a water purifier and its preparation and use methods, belonging to the technical field of water purification materials. The water purifier provided by the present invention comprises the following raw materials: calcium magnesium silicate mineral, activated carbon, clay mineral, iron oxide, and an inorganic solvent; the mass ratio of the calcium magnesium silicate mineral, activated carbon, clay mineral, and iron oxide is (2-3):(4-5):(1-2):(1-2). In the present invention, the calcium magnesium silicate mineral, activated carbon, clay mineral, and iron oxide can synergistically improve the purification effect of the water purifier. The calcium magnesium silicate mineral removes pollutants from water through adsorption and ion exchange; the activated carbon has a large specific surface area and a well-developed pore structure, which can remove organic matter and odorous substances from water through physical adsorption; the clay mineral has a layered structure, which can remove organic matter and other impurities from water through adsorption and ion exchange; the iron oxide contains a large number of hydroxyl groups on its surface, which removes pollutants from water through precipitation and adsorption.

The application provides a rare earth orthophosphate ceramic powder, a preparation method and application thereof, and belongs to the technical field of ceramic materials. The preparation method of the rare earth orthophosphate ceramic powder comprises the following steps: mixing a rare earth salt solution, a barium salt / strontium salt solution, a phosphorus source solution, a complexing agent and an inorganic solvent to perform a complexing reaction to obtain a sol; drying the sol to obtain a dry gel; and calcining the dry gel to obtain the rare earth orthophosphate ceramic powder. The precursors (the rare earth salt solution, the barium salt / strontium salt solution and the phosphorus source solution) in the form of solutions can be uniformly dispersed at a molecular level, so that the ceramic powder is uniform in size; the sol-gel method is adopted, and the particle size is always kept at the nanometer scale during the sol-gel process, so that the ceramic powder is small in particle size and uniform in distribution.

The invention discloses a preparation method and application of high-temperature-resistant coating slurry and a high-temperature-resistant quartz tube, and the slurry is prepared from the following components in parts by mass: 4-10 parts of phosphate, 4-10 parts of lyosol, 0.1-20 parts of silicon carbide, 0.1-20 parts of aluminum oxide, 0.1-10 parts of aluminum nitride and 4-20 parts of inorganic solvent. The coating prepared from the slurry can effectively reduce the deformation rate of the quartz tube at high temperature and prolong the service life of the quartz tube. Compared with the prior art, the slurry can be directly spin-coated on the surface of the quartz tube, the coating is uniform in coating and controllable in thickness, the production cost is greatly reduced, and industrial production is facilitated.