261results about How to "Low raw material cost" patented technology

The invention relates to a two-dimensional fiber/boron nitride nanotube multistage reinforcement and a preparation method thereof. In the two-dimensional fiber/boron nitride nanotube multistage reinforcement, boron nitride nanotubes are uniformly distributed on the surface of two-dimensional fibers. The preparation method for the two-dimensional fiber/boron nitride nanotube multistage reinforcement is innovatively explored for the first time, and the desired two-dimensional fiber/boron nitride nanotube multistage reinforcement is prepared. The preparation method is simple; raw materials for the reinforcement are cheap, safe and easily available; and a foundation is laid for subsequent construction of a three-dimensional fiber/boron nitride nanotube multistage reinforcement and research and development of a multistage reinforced composite.

The invention relates to a hydrophilic double-component grouting plugging material. The hydrophilic double-component grouting plugging material comprises a component A and a component B with a grouting volume ratio of 1: 1-5, wherein the component A comprises the following substances in parts by weight: 100 parts of polyether polyol, 10-50 parts of a plasticizer, 20-60 parts of isocyanate, 0.05-0.3 part of a catalyst, 20-60 parts of a solvent and 0.01-0.05 part of a retarder; the component B comprises the following substances in parts by weight: 100 parts of sodium silicate, 2-5 parts of a cross-linking agent and 0.5-2 parts of a catalyst. The plugging material related to the invention also has the characteristics of environment protection, no pollution, low cost and high dynamic strength besides the properties of great grouting capability, high gelatinizing speed, large water containing quantity and rapid and efficient seepage-proof plugging. The grouting plugging material is suitable for the grouting plugging of various buildings, such as ponds, water towers and basements, and the grouting plugging engineering of various ports, docks, bridge piers, dams and hydropower station curtains.

The invention relates to an optical cable foaming packing gasket granule and a manufacturing method thereof; the mixture ratio of the materials and the weight parts are: 50-60 parts of low density and high pressure polyethylene, 15-25 parts of high density and low pressure polyethylene, 10-30 parts of polypropylene, 0.5-1.5 parts of Tissuemat E, 0.5-1.5 parts of stearic acid, 0.4-1.2 parts of calcium stearate and 0.4-1.2 parts of four pentaerythritol fat which are prepared by heating kneading, extrusion, cooling, drying and grain-sized dicing. The granule has the density of 0.944 plus or minus 0.015g/cm<3>, tensile-strength of being more than or equal to 20MPa, the elongation of break of being more than or equal to 580 percent, the electric volume resistivity of being more than or equal to 1.0 multiplied by 10 <13> Omega m, the oxidation induced period of being more than or equal to 30 min, the solution moving speed of being less than or equal to 2.0g/10min and moisture of being less than or equal to 0.08 percent. The granule is prepared by three steps of mixing and kneading of material, fusing and extruding strip formation of the kneaded objects and cooling and grain-sized dicing of the strip, is exclusively used for preparing the material of optical cable foaming packing gasket, and has the advantages of light weight, saving material, being applicable to foaming and joint connection with PBT plastic, and the like.

The invention is a technique of making battery-level highly pure nickel sulphate by selective extraction of water quenched high nickel matte with vitriol, and its character: it contains in turn: finely grinding the high nickel matte, the first stage, normal pressure extraction, making evaporation crystallization on the extract and pulping the residues for preextraction; the second stage, pressure extraction, return the extract to the first stage for normal pressure extraction, and making pressure extraction on the residues in the third stage, and making copper electrowinning process on the extract to produce copper or evaporation crystallization on the extract to make copper sulphate, and returning the anode solution for the copper electrowinning process or the mother solution for evaporation crystallization for pulping and preextraction, making vacuum evaporation crystallization on the extracts in the three stages to make battery-level high-purity nickel sulphate.

The invention relates to a treatment method for decontaminating chromic slag by utilizing eutrophicated algal residue in the technical field of environmental protection. The treatment method comprises the following steps of: with algal residue as an additive, mixing the chromic slag and the algal residue according to a certain ratio; conveying the mixture into an externally heated rotary furnace for drying; then, conveying in an internally heated pyrolyzing furnace for a pyrolytic reaction; introducing high-temperature hot reaction gas in the internally heated pyrolyzing furnace from a reaction combustion furnace; cooling and discharging a pyrolytic product after reaction treatment; and mixing tail gas of the internally heated pyrolyzing furnace with air through a diluted tank and then enabling the mixture to enter the externally heated rotary furnace to indirectly dry the mixture of sediment and the chromic slag. The invention has the advantages of simple process flow, low investment cost, easily obtained additive raw materials and satisfactory reaction effect and can effectively realize the optimal utilization of values generated by the eutrophication of lakes while detoxifying the chromic slag.

The invention provides an Al-M-B grain refiner for casting an Al-Si alloy and a preparation method thereof. The Al-M-B refiner for casting the Al-Si alloy is composed of the components by mass: 85.0-96.0% of Al, 3.5-10.0% of M and 0.5-5.0% of B; the Al-M-B refiner contains refined particle phase MAl3 and MB2. The Al-M-B grain refiner is prepared by a fluoride salt method with Al blocks, K2TiF6 powder, Nb powder and KBF4 powder as raw materials. The Al-M-B alloy is prepared by melting. The prepared Al-M-B refiner can refine the grain size of alpha-Al in a high-silicon aluminum alloy to 700 microns or less, optimally to 200 microns or less; the amount of Nb is reduced and the cost of raw materials is reduced; the Al-M-B refiner has durable performance and is not easy to settle down and fail,and the refinement effect can still be less than 350 microns after heat preservation is performed for 2 h; the preparation method has the advantages of simple equipment conditions required for preparation and simple operation, and is suitable for industrial production.

The invention discloses a method for preparing barium sulfate nanoparticles, belonging to the technical field of preparation of chemical materials. The method comprises the following steps: vertically dispersing a sodium sulfate solution into a flowing barium sulphide solution or circularly following barium sulphide suspension liquid through a plurality of micropores, cutting the sodium sulfate solution by means of cross flow, reacting in a mixing way to obtain a barium sulfate precipitate, and carrying out curing, solid-liquid separation, impurity removal in a washing way, drying and smashing on reaction product to obtain the barium sulfate nanoparticles. The method for preparing the barium sulfate nanoparticles is low in raw material cost, high in production capacity, simple and convenient in operation process, and good in repeatability and stability, so that the conventional mirabilite-black ash method can enter into the production sequence of the nanometer level barium sulfate nanoparticles. The method can be used for preparing the barium sulfate nanoparticles with the mean grain sizes of 35-48nm.

The invention relates to a preparation method of flumioxazin and aims at the technical problems of high cost, low yield, not high purity, more by-products and serious pollution in an existing preparation method of flumioxazin. The preparation method disclosed by the invention comprises the following steps: 1. synthesis of 2-(5-fluoro-2-nitrobenzene oxygroup) methyl acetate; 2. synthesis of 7-fluoro-2H-1,4-benzoxazine-3(4H)-ketone; 3. synthesis of 6-nitro-7-fluoro-2H-1,4-benzoxazine-3(4H)-ketone; 4. synthesis of 6-amino-7-fluoro-2H-1,4-benzoxazine-3(4H)-ketone; 5. synthesis of 2-(7-fluoro-3-oxy-3,4-dihydro-2H-benzo[b][1,4]oxazine-6-group)-4,5,6,7-tetralin-1H-isobenzazole-1,3(2H)-diketone; and 6. synthesis of flumioxazin. The preparation method provided by the invention is mainly applied to the preparation of herbicides.

The invention discloses cement-based self-leveling mortar, which comprises the following components, by mass part, 160-180 parts of Portland cement, 40-55 parts of aluminate cement or sulphoaluminate cement, 30-40 parts of anhydrite, 15-25 parts of bentonite, 60-125 parts of heavy calcium carbonate powder, 600-650 parts of washed fluvial sand, 5-10 parts of redispersible emulsion powder, 0.4-0.6 part of a water reducer, 0.5-0.7 part of a retarder, 0.5-1.0 part of cellulose ether, 0.8-1.2 parts of an antifoaming agent and 0.3-0.5 part of an early strength agent. The cement-based self-leveling mortar is excellent in separation resistance, is low in cost, and is particularly suitable for a self-leveling layer with a relatively large thickness.

The invention relates to a Y2O3-MgO nano-composite ceramic and a preparation method thereof. The Y2O3-MgO nano-composite ceramic is shown as xY2O3.(1-x)MgO, wherein x is the percentage of the mole number of Y2O3 to the total mole number of Y2O3 and MgO; the value of x is more than or equal to 0.01 and less than or equal to 0.99. The method comprises the following steps: preparing Y2O3-MgO nano-composite powder by adopting a sol-gel method; sintering the sieved composite powder by virtue of discharge plasma sintering or hot isostatic pressing sintering to obtain the infrared transparent Y2O3-MgO nano-composite ceramic.

The invention discloses a minicrystal glass-ceramic composite plate and a production method. The minicrystal glass-ceramic composite plate is compounded by a minicrystal glass surface layer and a ceramic core layer; the minicrystal glass comprises the compositions measured in weight: 50 to 68 portions of SiO2, 3 to 10 portions of Al2O3, 20 to 38 portions of CaO, 3 to 12 portions of R2O (Na2O+K2O+Li2O), 0 to 3 portions of B2O3, and 0 to 12 portions of MgO. On the precondition of ensuring the process performance and crystallization performance and appearance decorated effect of product, the invention has no BaO and ZnO compositions, thus obviously reducing the cost of the raw material of minicrystal glass-ceramic composite plate.

The invention provides a preparation method of a polyhedral cobaltosic oxide-3D porous graphene gel composite material sensor film for detecting acetone and belongs to the technical field of gas-sensitive sensors. The method includes: 3D porous graphene gel is synthesized in a hydrothermal manner, the prepared 3D porous graphene gel is composited with a cobalt-based metal organic frame material, thermal treatment is performed on the composite material to obtain the composite material of polyhedral CO3O4 and the polyhedral cobaltosic oxide, and using a coating method to prepare the film for sensing and detecting the acetone. The composite material film can detect the acetone of different concentration, and the sensitivity of the composite material film to 50ppm CO2 reaches up to 81.2(Rgas/R0). The preparation method has the advantages that the method is simple, low in raw material cost and good in repeatability, and the prepared film is excellent in performance, good in application value and promising in application prospect.

The invention provides a moisture-conducting quick-drying weft-knitted fabric. The fabric can solve the problems that an existing moisture-conducting quick-drying fabric is not washable when treated with a functional additive, is not resistant to high temperature when water-repellent fibers serve as the inner layer, and is expensive and not easy to process when waterproof yarn serves as the inner layer. A grey fabric of the fabric is formed through weft knitting of at least two kinds of yarn different in DPF, wherein the looping area of the yarn, with the minimum DPF, in the at least two kinds of yarn different in DPF on the front side of the grey fabric accounts for 60-100% of the total area of the front side; the looping area or the floating thread area of the yarn, with the maximum DPF, in the at least two kinds of yarn different in DPF on the reverse side of the grey fabric accounts for 60-100% of the total area of the reverse side; the DPF value of the yarn with the maximum DPF is at least 0.3 larger than that of the yarn with the minimum DPF. The invention provides a processing technology of the moisture-conducting quick-drying weft-knitted fabric. The technology comprises the following steps of grey cloth weaving, pre-treatment, dyeing, reduction washing, high-temperature setting, reduction washing and finished product shaping.

The making process of no-frying noodles includes the steps of mixing flour as main material and water, cooking, pressing into sheet, steaming, forming, stoving and packing, and features that noodles after the first steaming is further processed through showering or soaking in water, the second steaming, cutting to form and stoving to form finished product. The increased showering step and re-steaming step can make the noodles completely cooked and realize the continuous mechanical production. Omitting the frying step can lower the production cost. The said production process may be used in producing instant noodles as well as other kinds of noodles.

The invention provides an electrical heating continuous coal pyrogenation coking furnace which includes a furnace body, the furnace body is equipped with a hopper, a pre-heating segment, an electrical heating main body segment, a gas cycle cooling segment and a coke discharge segment orderly from upper to down; control valves are set among the hopper, the pre-heating segment, the electrical heating main body segment, the gas cycle cooling segment and the coke discharge segment. The coking furnace has advantages as follows: 1. the furnace can control rolling speed and heating effect of moulded coal efficiently in rolling process of coking coal; 2. the furnace solves temperature and environment atmosphere required by the coal pyrogenation coking; 3. the furnace changes traditional coke cooling method by water into inert gas cycle for realizing heat energy utilizing fully, is energy-saving and environmental-friendly; 4. the furnace reduces raw material cost, increases coke quality and reduces coke foam and coke particle generating; 5. the furnace can replace full coal gas by electrical heating which can solve smoke pollution efficiently.

The invention discloses an aqueous adhesive of shoe and manufacturing method in the shoe adhesive domain, which comprises the following parts: 8-20% polyacrylacid ester emulsion, 75-90% aqueous polyurethane emulsion, 0-3% acetone and 0.2-1% thickener, wherein the polyacrylacid ester emulsion is composed of butyl acrylate, methyl methacrylate, acrylic acid isooctanoic ester, ethyl acrylate, acrylic acid, emulsifier, buffer, reducer and initiator. The manufacturing method comprises the following steps: emulsifying; prepolymerizing; polymerizing; neutralizing; blending.

The invention relates to an ultrahigh-strength steel plate, which comprises, by weight percentage, 0.25-0.35% of C, 0.20-0.60% of Si, 0.8-2.0% of Mn, no more than 0.010% of P, no more than 0.005% of S, 0.02-0.06% of Al, 0.30-1.00% of Cr, 0.20-0.60% of Mo, 0.01-0.05% of Ti, 0.001-0.005% of B, no more than 1.0% of Ni, and the balance of Fe and unavoidable impurities. A production method of the ultrahigh-strength steel plate includes: smelting the components, obtaining a blank or ingot by casting; heating the bank or ingot to 1180-1250 DEG C prior to rolling, rolling in the first stage in a recrystallization area, performing multi-pass high reduction rolling with accumulative deformation not less than 80%; rolling in the second stage in a non-recrystallization area, finish rolling temperature being controlled at 870 to 930 DEG C); accelerating to cool the rolled steel plate to below 200 DEG C; and tempering at 200+/-20 DEG C to obtain the steel plate 4-15mm thick. The yield strength of the steel plate is not less than 1400MPa, the tensile strength of the steel plate is not less than 1800MPa, and Charpy impact power Akv at -20 DEG C is not less than 20J.

The invention relates to a method for preparing a ZSM-5 molecular sieve by using solid wastes, in particular to a preparation technology for synthesizing the ZSM-5 molecular sieve by using rice husk ash, iron tailings, gold tailings and other solid wastes as raw materials to provide all or part of silicon sources and aluminum sources required by the synthesizing of the ZSM-5 molecular sieve without solvent and NaOH (sodium hydroxide). The method comprises the following steps of mixing the silicon sources, the aluminum sources, Na2CO3-10H2O, a template agent or crystal grains, directly puttinginto a reaction kettle, and crystallizing at constant temperature, so as to obtain the ZSM-5 molecular sieve. The method has the advantages that by applying the Na2CO3-10H2O into the technology usingthe solid wastes as the raw material to synthesize the ZSM-5 molecular sieve, the secondary pollution is avoided in the synthesizing process; by using the rice husk ash, the iron tailings, the gold tailings and other solid wastes as the raw materials to synthesize the ZSM-5 molecular sieve by a non-solvent method, the technology is simple, and the application range is wide; the problem of environment due to solid wastes is relieved, and the utilization of solid wastes with high added value is realized.

The present invention discloses a fiber fabric flame retardant agent, which comprises the following substances, by weight, 10-20 parts of dicyandiamide, 10-20 parts of polyoxyethelene, 3-6 parts of triethanolamine, 5-8 parts of methylol melamine, 20-30 parts of ethylene glycol, 1-3 parts of sodium tripolyphosphate, 10-20 parts of formaldehyde, and 80-100 parts of water. Compared with the fiber fabric flame retardant agent in the prior art, the fiber fabric flame retardant agent of the present invention has the following advantages that: (1) the fiber fabric flame retardant agent can be used for flame retardant finishing of the fabric, can provide a durable flame retardant effect for the fabric, and has characteristics of simple production process, low raw material cost, and good flame retardation effect; (2) the fabric has an excellent flame retardation performance after washing several times; (3) the fiber fabric flame retardant agent is colorless and transparent, does not contain halogen, does not affect color fastness to daylight, has a soft hand feeling, and does not generate dampening crystallization; and (4) the fiber fabric flame retardant agent has characteristics of no color, transparency, flame retardation, no toxicity, no corrosion, and no pollution.

The invention relates to a method for forming a ceramic coating on metal surfaces by argon arc welding-assisted self-propagating. The method comprises the following process steps: (1) batching: taking two or more powdered reactant materials which are capable of performing self-propagating high-temperature synthetic reaction and a powdered metal material which accounts for 0-40% of the total weight of the reactants as a powdered additive material according to chemical dosing proportion for batching; (2) mixing; (3) coating: coating the powdered materials mixed in the step (2) on the surface of a polished workpiece; (4) drying; and (5) performing the argon arc welding-assisted SHS: igniting the workpiece coating by electric arc with 80A current and 60V voltage, thus producing the self-propagating reaction on the workpiece surface coating and then producing the ceramic coating on the metallic matrix surface. The method has the advantages of directly forming and preparing the smooth and dense ceramic coating with high bonding strength, low porosity and high quality on the metal surfaces, high heat utilization efficiency, low coating preparation cost, easy control, small burning loss and sputtering, and being safe and reliable.

The invention discloses a process for synthesizing analcite from potassium feldspar powder by virtue of a hydro-thermal alkaline method. The process comprises the following steps: crushing potassium feldspar ores, grinding into powder of which the particle size is less than 74 microns, then fully mixing the potassium feldspar powder with a sodium hydroxide solution with a certain concentration to prepare a slurry, performing hydro-thermal treatment on the slurry for 1-12 hours in a reaction kettle under the condition that the temperature is 180-260 DEG C, and performing filtration, washing and drying on an obtained mixture to prepare analcite powder after reaction ends, wherein an obtained filter liquor is a mixed alkaline liquor of potassium silicate and sodium silicate, and can be used for preparing potassium salt. The process disclosed by the invention provides a cheap potassium feldspar raw material and a simple and feasible process for the synthesis of analcite, and also can be used for solving the problems of quantity reduction and efficient utilization of silicon-aluminum by-products in a process of preparing the potassium salt from potassium feldspar.

The invention discloses a composite barrier for preventing horizontal diffusion and migration of underground water layer pollutants and application thereof. The composite barrier is formed by encapsulating expansion clay by a water-soluble polymer film. During the application, the composite barrier is placed into a vertical open groove with a watertight layer arranged at the groove bottom, the filling height of the composite barrier in the vertical open groove is not lower than the upper plane of the underground water layer, wall protecting slurry is removed, and then, soil is filled back into the vertical groove until the vertical groove is flatly filled. The composite barrier has the advantages that the construction is simple, the engineering manufacturing cost is low, the anti-seeping effect is good, and the like. The horizontal migration of pollutants in the underground water layer can be better prevented.

The invention discloses a super-strength transparent imitated shell composite thin film and a preparation method thereof, and belongs to the technical field of bionics. The preparation method comprises the steps of mixing MMT colloid and ALG aqueous solution, and adding calcium chloride into the mixed solution to form an egg tray structure; and then performing vacuum filtration to obtain the super-strength transparent imitated shell composite thin film. The imitated shell thin film with a 'brick-mud' structure, an inorganic phase surface micro-protrusion interlocking structure and an organic matter bridging structure are prepared by using the sodium alginate and the montmorillonite as raw materials, the thin film has excellent mechanical property, the tensile strength is up to 243MPa, the average deformation is 5.38%, the thin film has excellent transparency, and the transmittance of visible light is up to over 88%.

The invention relates to a preparation method of a low-cost petroleum fracturing propping agent. A low-density fracturing propping agent is prepared by taking low-price raw mineral materials and industrial wastes as main raw materials, belonging to the technical field of new materials of petrochemical industry. The preparation method comprises the following steps: by taking 16-60wt% of olivine powder or 15-65wt% of boron mud powder or 15-70wt% of chlorite powder as main raw materials, proportioning 5-60wt% of silica powder and 2-30wt% of clay powder in the main raw materials; uniformly mixing the raw materials and balling in a balling pot to obtain a semi-product; and calcining the semi-product in a rotary kiln at 1200-1300 DEG C to obtain the low-density fracturing propping agent. According to the preparation method provided by the invention, the purpose of reducing the calcining temperature and improving the yield is realized by changing the system of the raw materials and introducing the industrial waste which mainly contains silicon and magnesium and the raw mineral materials which are low in price and easy to get to replace aluminum raw materials which are more expensive such as bauxite. The preparation method is an energy-saving and low-cost method of preparing the petroleum fracturing propping agent.

The invention relates to a one-step forming method for the online hot stamping and concave-convex die cutting of web gravure printing. The one-step forming of the online hot stamping and concave-convex die cutting of a printing machine cannot be realized in the prior art. In the method, a printed web is subjected to hot stamping; the accuracy of the hot stamping is ensured through a line cursor tracker and an encoder; as a series roller is adjusted through an adjusting motor, the sum of the rotating velocity of a charging roller and the jumping velocity of the serial roller equals to the transmission velocity of the web; the temperature of a hot stamping roller is controlled between 200 DEG C and 260 DEG C; the pressure of the hot stamping roller is controlled between 0.3MPa and 0.7MPa; the rotating speed of the hot stamping roller is controlled between 130r/min and 136r/min; an alarming system reminds a user of pre-placing an electroplating aluminum foil; the hot-stamped web passes through a processing device; and therefore, the concave-convex pressing and die cutting are realized, and the online hot stamping and the concave-convex die cutting of the web gravure printing are realized. The one-step forming method has the advantages of simple technology, reduced cost of raw materials and improved accuracy.

The invention discloses a synthetic method of terpene resin. The synthetic method comprises the following steps of: adding a catalyst to a solvent, after uniform mixing, slowly dropwise adding a raw material at low temperature, carrying out low-temperature polymerization, and synthesizing the solid terpene resin after sequentially hydrolyzing, washing and distilling, wherein the raw material is a product obtained through high vacuum reduced-pressure fractionation of heavy turpentine and contains 60%-80% of beta-phellandrene, the solvent is toluene, the proportion of the solvent to the raw material is 0.6-2: 1, the catalyst is one or a mixture of aluminium trichloride anhydrous and antimony trichloride anhydrous, the proportion of the catalyst to the raw material is 0.04-0.08: 1, the temperature of the interior of a reaction kettle for low-temperature polymerization is minus 15 DEG C to minus 5 DEG C, and the time of low-temperature polymerization is 4-8 hours. Compared with the prior art, the synthetic method can solve the problem that the traditional terpene resin is high in production cost.

The invention relates to a method for preparing hafnium boride powder by using a boron/carbothermic method. The method comprises the following steps: (1) dissolving hafnium oxide and boron carbide in absolute ethyl alcohol or deionized water to mix up uniformly, and ultrasonically dispersing for 0.5-4 hours, wherein the concentration of a hafnium oxide solution is 0.3-3mol/L, and the concentration of a boron carbide solution is 0.3-3mol/L; (2) dissolving a carbon source into a solvent, subsequently pouring into a mixed suspension, heating and stirring to obtain a reactant which is uniformly mixed; and (3) adding the reactant into a graphite crucible, putting the graphite crucible into a thermal treatment furnace or a vacuum furnace for heating in the presence of flowing argon, subsequently cooling down to room temperature along with the furnace, further grinding to obtain HfB2 powder with the particle size of 100-500nm. According to the method, a hafnium source, a boron source and a carbon source are mixed in a wet mixing manner, and are uniformly mixed and not easy to agglomerate, the synthesis process is performed in high-purity Ar or vacuum, and the HfB2 powder can be synthesized through reduction reaction at low temperature, and is low in cost of raw materials.

The invention provides a method for preparing dichloropropanol, which comprises the following steps: under the action of a catalyst, chlorinating biodiesel byproduct glycerol with chlorine hydride by using a catalytic chlorination technique which comprises continuous feeding, vacuum distillation and continuous production, thereby generating monochloropropanol; and converting the monochloropropanol into dichloropropanol. The dichloropropanol produced by the method is mainly used as a raw material for producing epoxy chloropropane. In the technique for producing dichloropropanol, the utilization ratio of chlorine hydride is very high, and nearly no chlorine hydride is discharged out, thereby greatly reducing the environmental pollution. The invention has the advantages of mild reaction conditions, high catalyst activity, specific catalytic performance, high product selectivity, clean process, easy separation, continuous operation, environment friendliness and the like.

The invention relates to a method for preparing chalcopyrite structure CuInSe2 or/and CuInSe2/ZnS core-shell structure quantum dots, comprising the following steps: firstly preparing an In3<+>, Cu<+> cation precursor solution, rapidly heating up from room temperature to 200-250 DEG C under the protection of argon, rapidly injecting an Se precursor solution, reacting for 15-60 min to obtain a CuInSe2 quantum dot solution; reacting for 30-60min at 190-230 DEG C by dropwisely adding a zinc precursor solution, then naturally cooling to room temperature, and carrying out centrifugal purification to obtain CuInSe2/ZnS core-shell structure quantum dots, wherein the obtained CuInSe2 quantum dots have a chalcopyrite crystal structure, the atomic ratio of Cu to In to Se is close to 1 to 1 to 2, the range of the fluorescence emission peak of the CuInSe2/ZnS core-shell structure quantum dots is 700-960 nm, and the fluorescence quantum yield is 19.8-33.4 %. According to the invention, the method uses the low-cost Se precursor, the process is simple, the synthetic period is short, the method is beneficial for batch production, and the synthesized CuInSe2/ZnS quantum dots are near-infrared luminous and have good fluorescence efficiency, and lay the foundations for the application of quantum dots in bioluminescence imaging in vivo.

The invention relates to a stove heat-insulating shield. The shield comprises an annular shield body, and is characterized in that the shield body is of a double-layer structure formed by an upper layer shield and a lower layer shield, a cavity is formed between the upper layer shield and the lower layer shield, pot supporting legs which are arranged at intervals in the circumferential direction are fixed on the upper surface of the upper layer shield. Compared with the prior art, the stove heat-insulating shield has the advantages that the stove heat-insulating shield is additionally arranged, the heat-insulating shield is of a double-layer structure, the heat preservation property is improved, meanwhile, the built-in pot supporting legs are fixedly arranged on the heat-insulating shield,so that heat absorbed by the pot supporting legs can heat the pot bottom as much as possible through heat conduction, meanwhile, the heat loss of flames is reduced. The invention further discloses astove utilizing the heat-insulating shield. Secondary air supplementing grooves of the shield body can be aligned with secondary air inlets of a combustor gas mixing chamber one by one, meanwhile, thesecondary air supplementing grooves of the shield body can be opposite to the secondary air inlets of the combustor gas mixing chamber under the cooperation of a positioning block on a stove panel and a shield body matching groove, so that secondary air can be effectively supplemented.