34results about How to "Help industrial production" patented technology

The invention belongs to the technical field of preparation of thermoelectric materials and particularly relates to a microwave sintering synthesis method of an oxide thermoelectric material Ca3-xKxCo4O9. The microwave sintering synthesis method comprises the following steps of (1), firstly weighting CaCO3, K2CO3 and Co2O3 according to stoichiometric molar ratio in Ca3-xKxCo4O9, grinding, placing ground powder in a crucible, placing the crucible in a sintering furnace, heating to 820-880 DEG C, pre-sintering for 20-30 hours at a constant temperature, cooling to room temperature in the furnace and taking out; and (2) carrying out second grinding on pre-sintered powder, pressing to sheets, holding the sheets in a double crucible, placing the double crucible in a flattening microwave oven, heating the double crucible for 10-15 minutes at a power of 400-640W, cooling the double crucible to room temperature in the furnace, taking out and pressing into sheets to obtain the target product. The method is simple in operation, the reaction raw materials during the reaction are solid, the chemical components of a reaction product is easy to control, the reaction time is short, the cost is low and the large-scale batch production of the material is facilitated; and the thermoelectric parameter power factor of the product prepared by the method is higher than that of the product prepared by virtue of a high-temperature-furnace sintering method and the thermoelectric performance is more prominent.

The invention relates to a preparation method of a folic acid coupled gold nano-rod / polypyrrole / ferroferric oxide multifunctional composite nano diagnosis and treatment agent. The preparation method comprises the following steps: by adopting composite nanoparticles consisting of gold nano-rods, polypyrrole and ferroferric oxide as a substrate, modifying the surfaces of the composite nanoparticles by using polycationic electrolyte chitosan and polyanionic electrolyte sodium alginate respectively by virtue of a layer-by-layer self-assembly process to ensure that the surfaces of the nanoparticles contain amino groups, and then connecting with carboxy groups of folic acid. The prepared multifunctional composite nano diagnosis and treatment agent disclosed by the invention has the advantages of high photo-thermal conversion efficiency, good biocompatibility, active tumor targeting performance, strong cancer cell killing ability, significant imaging effect, a function of being controlled for a long time, and the like, and can be applied to treatment, pathological magnetic resonance imaging analysis and medical diagnosis of X-ray computer tomography and ultrasonic imaging of tumors or cancers of human bodies or other mammals.

The invention relates to the technical field of degradable materials, in particular to a high-content-rice husk fiber-filled PBAT-based composite material. The composite material comprises the following components: in parts by weight, 90-110 parts of rice husk powder, 35-90 parts of PBAT, 10-25 parts of PLA, 2-5 parts of a super dispersant, 5-20 parts of a compatibilizer, 1-4 parts of a heat stabilizer and 2-4 parts of a lubricant. The raw materials are mixed and stirred in a high-speed mixer at 120 DEG C, and then crushing, extrusion and injection moulding are performed. The rice husk powderas agricultural processing waste has rich raw material sources, low price and biodegradability at the same time, the rice husk powder is adopted as filler of the degradable polymer PBAT, and the rigidity and toughness of the composite material can be balanced well under the action of the processing aids; and the method has simple operation and low production cost, and is beneficial to industrial production of PBAT degradable composite materials.

The invention discloses a PTT nano-composite material, which comprises the following components by mass: 70%-90% of PTT, 0.5%-20% of nanoparticle, 0.1%-0.5% of a coupling agent, 3%-10% of a compatibilizer, 0.1%-0.5% of an antioxidant, and 0.1%-1% of a lubricant. The nanoparticle is one of nano-calcium carbonate, nano-barium sulfate, nano-montmorillonite, nano-kaolin, nano-titanium dioxide, nano-silicon dioxide, nano-zinc oxide, nanometer antimony doped tin dioxide, nano-magnesium hydroxide, and nano-aluminum hydroxide. The PTT nano-composite material provided by the invention has the respective advantages of PTT and nanoparticle blending modification, has excellent mechanical properties, processability and heat resistance, and the product has good molding appearance, strong chemical resistant stability, wide adaptability, and simple preparation process, thus being conducive to industrial production.

The invention relates to a method for making rice steamed sponge cakes through synergistic fermentation of fresh fermented glutinous rice and yeast and a processed product of the rice steamed sponge cakes. The method comprises the following steps that firstly, rice pulp is subjected to oxygenation fermentation by using the fresh fermented glutinous rice to obtain fresh-fermented-glutinous-rice fermented rice milk; secondly, the yeast is added into the fresh-fermented-glutinous-rice fermented rice milk for synergistic fermentation; finally, steaming and aging are conducted to obtain the rice steamed sponge cakes. The rice steamed sponge cakes are made by means of the method of step-by-step synergistic fermentation of the fresh fermented glutinous rice and the yeast, the fresh fermented glutinous rice and the yeast synergistically cooperate with each other, the quality of the rice steamed sponge cakes is effectively optimized, the product can be soft in texture, good in elasticity and toughness, cool and smooth in taste and rich in sour and sweet flavor, the fermentation time of the product can be effectively shortened, the production cycle is shortened, and industrial production isfacilitated.

The invention provides manipulator automatic bending equipment. The equipment is applied to a bending machine, the bending machine is provided with a base support, a pushing mechanical arm and a discharging channel, the pushing mechanical arm and the discharging channel are arranged at the two ends of the base support, and the mechanical arm automatic bending equipment comprises a rack arranged atthe side edge of the base support and provided with a through groove, a first driving source arranged on the rack and used for providing power, a movable arm movably arranged in the through groove, an upper die base, a positioning pre-pressing part and a lower die base. The first driving source can drive the movable arm to vertically move; the upper die base is arranged at the end, extending outof the through groove, of the movable arm; the bottom of the upper die base is connected with a bending stamping head; the positioning pre-pressing part is arranged at one end of a bending stamping head in a sliding manner and used for bending and positioning a workpiece; the lower die base is arranged on a base support and corresponds to the upper die base in position; and a bending part of the workpiece is accurately positioned through the positioning pre-pressing part, and the machining efficiency is improved while the machining precision is improved.

The invention relates to a catalyst preparation technology, and aims to provide a preparation method of a catalyst for preparation of FDCA (2,5-furandicarboxylic acid) through catalytic oxidation of HMF (5-hydroxymethylfurfural), and application of the catalyst. The application method comprises the following steps: adding HMF and potassium ferrate into a reaction container; adding deionized water,NaOH and K2HPO4 into a flask, and reacting under the condition of 25 DEG C for 15 minutes, wherein after the reaction, the solution is pasty; filtering to obtain filtrate, and adding concentrated hydrochloric acid into the filtrate dropwise until a large amount of white precipitate is generated; and filtering, putting solid substances into a drying box at the temperature of 50 DEG C and drying for 24 hours to obtain a white product, namely the 2,5-furandicarboxylic acid. The catalytic cost of the potassium ferrate is lower relative to that of noble metal, and the reduction product of the potassium ferrate after reaction is ferric oxide hydrate which is environmentally friendly, is a green product and avoids pollution. Through control of the alkaline condition of the system and the use amount of the buffer solution K2HPO4, the stability of the potassium ferrate can be improved and efficient preparation is realized.

The invention discloses a PTT flame-retardant heat-resistant modified master batch and a preparation method therefor. The PTT flame-retardant heat-resistant modified master batch comprises the following ingredients, by weight, 15%-50% of PTT resins, 20%-40% of flame retardants, 2%-5% of heat stabilizers, 0.1%-2% of anti-oxidants, 0.5%-5% of dispersants, 5%-40% of calcium carbonate and 3%-15% of POE. The flame retardants are one or some of decabromodiphenylethane, cyanuric acid melamine, polysulfonyldiphenylene phenyl phosphonate, bisphenol-A bis (diphenyl phosphate), polymethylphenyl sioxane and nano-sized magnesium hydroxide. The beneficial effects are that the PTT flame-retardant heat-resistant modified master batch has characteristics of environmental protection, no pollution, high concentration, high dispersion, high flame retardation, high heat resistance and the like, when the PTT flame-retardant heat-resistant modified master batch is added in the production of PTT, effects of excellent flame retardation, enhancing, toughening and the like are achieved, the modification effects are good, the heat resistance is high, the cost is low, usage is convenient, and the PTT flame-retardant heat-resistant modified master batch is helpful for industrial production.

The invention discloses a preparation method of a glycosylated hemoglobin calibration quality control product, and belongs to the technical field of medical examination. Fresh pig blood is used as a material for preparing the hemoglobin calibration quality control product, a high-value quality control product is prepared through cleaning, glycosylation reaction and dialysis purification, and calibration products with the percentage content being 5% and 12% and quality control products with the percentage content being 6% and 10% are obtained through prepared treating fluid. And the calibration quality control product covering the normal test range and the abnormal test range can be directly obtained at one time. Compared with the randomness of preparing the glycosylated hemoglobin calibration quality control product from human whole blood, the method is stable and controllable, the fresh pig blood is wide in source, low in cost and easy to obtain, the method is suitable for mass production, industrial production is facilitated, the yield of the hemoglobin calibration quality control product is effectively improved, and the biosafety problem does not exist. The hemoglobin calibration quality control product prepared by the method disclosed by the invention is good in stability, and has no obvious change before and after being stored for 12 months at 2-8 DEG C.

The invention provides a full-vanadium oxidation reduction flow battery which comprises a positive electrode, a negative electrode, a membrane, a positive electrode electrolyte and a negative electrode electrolyte, wherein the negative electrode comprises a carbon material substrate and a Sn-containing electro-catalyst combining with the carbon material surface; the negative electrode electrolyte comprises 1.0mol / L-1.8mol / L of vanadium ion, 2.0mol / L-5.0mol / L of sulfuric acid, and 0.01mol / L-0.3mol / L of Sn phosphate. According to the invention, the Sn-containing electro-catalyst is combined with the carbon material surface, so that the carbon material surface has higher catalytic activity; the electro-catalytic activity of the electrode material for V(III) / V(II) electron pair reaction is increased; the electrochemical polarization is reduced; the voltage efficiency and the energy efficiency of the battery are increased; according to the invention, Sn ion is introduced into the electrolyte, so that the electrochemical activity of the vanadium battery electrolyte is increased; the capacity fading of the vanadium battery is reduced; the use ratio of the electrolyte is increased when the battery is charged / discharged under a high-current density condition; the energy efficiency of the vanadium battery is increased.

A method for preparing a graphene-based LiFePO4 / C composite material is disclosed to solve the problem that both the conductivity and the rate capability of the existing lithium iron phosphate positive electrode materials are poor. The keys of the method are: 1) preparing an iron salt solution having graphene oxide dissolved therein; 2) preparing an iron phosphate / graphene oxide precursor; 3) preparing the graphene-based LiFePO4 / C composite materials. The method's beneficial effects lie in: the technological process is simple and easy to control, the obtained graphene-based LiFePO4 / C composite material, having high specific capacity, good cycle performance and excellent rate capability, is especially suitable for power battery application field.

The invention relates to technologies of polyester preparation by means of biomass, and provides a method for preparing polyhexylene 2,5-furandicarboxylate (PHF) by means of biomass. The method comprises the steps that 1,6-HDO and FDCA are subjected to esterification reaction to generate oligomer, through condensation polymerization, high polymer is obtained, and through purification, a product PHF is obtained; the FDCA is obtained by using potassium ferrate as a catalyst for catalyzing an oxidized woody biomass based platform chemical compound HMF. According to the method, the FDCA and the 1,6-HDO are used as raw materials, and both the FDCA and the 1,6-HDO are environmentally friendly and come from the biomass, so that green and economic preparation of the PHF is achieved; the method hasthe advantages of being low in catalyst cost, environmentally friendly and pollution-free; the reaction system of a catalyst promoter and the potassium ferrate / sodium hydroxide / dipotassium phosphategenerates a synergistic effect, so that the yield of the FDCA is improved; butyl titanate can not only be used as a catalyst of the esterification reaction, but also be used as a catalyst of condensation polymerization, so that one-time adding in a reaction process is achieved, experimental operation is made simple, convenient and safe, and the synthesis efficiency is high.

The invention discloses a method for preparing porous hydroxyapatite particles for deeply absorbing copper ions in solution, belonging to the technical field of chemical preparation. First, drop the phosphoric acid solution into the calcium hydroxide suspension containing citric acid to prepare a solution containing hydroxyapatite colloid. After washing with ammonium chloride, add polyvinyl alcohol with an average degree of polymerization of 350 or 1750, and then After hydrothermal treatment at C for 6 hours, cool to room temperature and centrifuge, dry the sediment at 60°C and put it in a solution containing polyethylene glycol (average molecular weight: 2000), dry at 80°C, and then heat up After calcination at 600°C and heat preservation for 2 hours, cooling with the furnace, the obtained particles were crushed and sieved to prepare porous hydroxyapatite particles for deep adsorption of copper ions in the solution. The process of the method is simple, the price of raw materials is low, the prepared porous hydroxyapatite particles have high porosity and low crystallinity, and the removal speed, high removal rate and high adsorption capacity of copper ions in the solution are fast.

The invention provides a method for increasing the amount of thalli obtained by fermentation of bacillus cereus, increasing the proportion of spores generated from the bacillus cereus and improving the storage stability of the bacillus cereus. The method comprises the following steps: in the fermentation culture process of bacillus cereus, air is introduced into the bottom of a fermentation tank, and the introduction speed of the air is 1-10 L / min, preferably 7-10 L / min. Therefore, by adjusting the fermentation process, the amount of thalli obtained by fermentation of the bacillus cereus, the proportion of spores generated from the bacillus cereus and the storage stability can be greatly improved.

The invention discloses a flame-retardant heat-resistant polyvinyl chloride material and a preparation method thereof. The flame-retardant and heat-resistant polyvinyl chloride material is prepared from the following raw materials in parts by weight: 100 parts of polyvinyl chloride resin powder, 10 to 18 parts of butadiene rubber, 5 to 10 parts of maltodextrin, 0.3 to 0.9 part of sodium diisobutylnaphthalene sulfonate, 0.1 to 0.16 part of sodium bis-2-ethylhexylthiosuccinate, 0.15 to 0.35 part of zinc borate, 0.1 to 0.2 part of an antioxidant, 0.2 to 0.5 part of methyl silicone oil and 0.4 to0.8 part of a vulcanizing agent. The preparation method of the flame-retardant heat-resistant polyvinyl chloride material comprises the following steps: S1, preparing raw materials; s2, mixing the raw materials; and S3, plasticizing and granulating the mixed raw materials. The polyvinyl chloride material provided by the invention has good mechanical properties, heat resistance, flame retardancy and processing formability, and the preparation method is simple, easy for industrial production and environment-friendly.

The invention discloses an efficient and economical pig muscle stem cell separation method and application thereof, and belongs to the technical field of biology. According to the method, different enzymes for digesting muscle tissues are combined, the single cell releasing capacity of different combined enzymes is determined, the most efficient and economical enzyme combined digestion mode (the combination of streptavidin and dispersozyme) is selected, and finally a large number of muscle stem cells are obtained through a differential purification method. The invention further discloses a method for efficiently digesting the pig muscle tissue, and the muscle stem cells can be maximally added while the cost is reduced. By applying the enzyme combined digestion and separation method, the total single cell number of 4.6-6 * 10 < 6 > cells / g and the pig muscle stem cell number of 8-15 * 10 < 5 > cells / g (in a double positive proportion of CD29 and CD56) can be stably obtained. The muscle stem cells obtained through separation have high differentiation capacity, and an efficient and economical separation method is provided for research and actual production of cell culture meat seed cells.

The invention belongs to the technical field of analysis, and discloses a method for detecting the purity of methyl 2-(2-chloro-1-ethylene) hydrazide formate. The detection method comprises the following steps: dissolving a2-(2-chloro-1-ethylene) chloromethyl formate in a diluent to obtain a control sample solution; dissolving a to-be-detected sample in the diluent to obtain a to-be-detected sample solution; taking the control sample solution, detecting by liquid chromatography, and recording a chromatogram A; and taking the to-be-detected sample solution, detecting the to-be-detected sample solution by liquid chromatography, and recording a chromatogram B, calculating the purity according to the chromatogram A and the chromatogram B; wherein the conditions of the liquid chromatography comprise a mobile phase A and a mobile phase B, the mobile phase A is a phosphate buffer solution and acetonitrile, the mobile phase B is acetonitrile; wherein the volume ratio of the phosphate buffer solution to acetonitrile in the mobile phase A is (950+ / -8): (50+ / -0.8). The detection method can be used for accurately detecting the purity of the 2-(2-chloro-1 ethylene) hydrazide methyl formate in the sample to be detected.

The invention discloses a method for accelerating element diffusion on the surface of low-carbon steel. Step 1: remove oil stains and oxides on the surface of low-carbon steel materials, mix hard ceramic powder with elemental powder, and put it into a grinder for mechanical mixing for 20-120 minutes to make the powder Refining and fully mixing; Step 2: Treat the surface of the sample obtained in Step 1 by bombarding it with supersonic particles, dry it after ultrasonic cleaning, heat treat the sample, and finally obtain a low-carbon steel material with better diffusion effect . The process of the invention is simple and easy, and at the same time, the cost is low, and the deformation of the material is small, the surface is more uniform, the process is simple, and the powder can be reused to facilitate industrial production. It has less environmental pollution and less energy consumption, and can be widely used in the boronizing and carburizing process of industrial gears.

The invention discloses a fluorine-containing surfactant and its preparation method and application. The preparation method of the surfactant is to react a fluorocarbon acrylate compound with an amine compound and then react with an acid anhydride to obtain a fluorine-containing surfactant. Chain surfactants, this reaction can prepare a new type of fluorosurfactant containing 1 to 3 fluorocarbon chains by using different unit amines, diamines and triamines. This new type of surfactant has excellent The characteristics of reducing the surface tension of the liquid, the preparation method has the advantages of easy to obtain raw materials, easy structure control, high reaction yield and good product characteristics. At the same time, the preparation method avoids the use of phosphorus oxychloride or phosphorus trichloride. Pollution and high-risk chemical materials reduce the threshold for the preparation of fluorine-containing surfactants, no by-products are eliminated during the reaction process, and production equipment will not be corroded, which is especially helpful for industrial production.

The invention discloses a preparation method of a dialdehyde cellulose Salen MX catalyst. The method includes the steps of: 1) substituting the hydroxyl groups of 2nd and 3rd positions of cellulose into aldehyde groups, and adding ortho-aminophenol to perform a reaction at 50-70 DEG C for 2-4 h, filtering the reaction product to obtain a brown precipitate; 2) repeatedly washing the brown precipitate with ethanol, and drying the brown precipitate at room temperature to obtain a dialdehyde cellulose Salen MX ligand; 3) adding a transition metal compound and the dialdehyde cellulose Salen MX ligand to ethanol at the same time, performing a stirring reaction for 12-18 h at 40-70 DEG C under protection by N2, adding anhydrous LiCl, feeding air, and performing stirring reaction for 24-36 h at 30-50 DEG C; 4) filtering the reaction product to obtain a dark-brown precipitate, repeatedly washing the dark-brown precipitate with ethanol and water, and drying the dark-brown precipitate at room temperature to obtain the dialdehyde cellulose Salen MX catalyst. The dialdehyde cellulose Salen MX catalyst has excellent application prospect in the fields of catalyzing epoxidation of natural monoterpenes and copolymerization of epoxy compounds, is simple in preparation method, can be repeatedly used for more than eight times, is prepared with regenerable supporter, is high in yield and selectivity, and has advantages in industrial production of olefin catalytic epoxidation.

The invention relates to a plant nutrient for planting selenium-enriched rice. The plant nutrient comprises nano selenium dioxide, sulfur-containing amino acid, bacillus subtilis and a Tween surfactant. According to the plant nutrient disclosed by the invention, inorganic selenium is converted into biological organic selenium through the photosynthesis of rice under the combined action of sulfur-containing amino acid and bacillus subtilis, and the biological organic selenium is naturally enriched in the rice, so that the selenium content of the rice is increased. Particularly, according to the plant nutrient disclosed by the invention, through the Tween surfactant formed on the surface of the nano selenium dioxide, the damage of the nano selenium dioxide to the activity of the bacillus subtilis is favorably inhibited, so that the storage stability of the plant nutrient is favorably improved, and the industrial production is facilitated.

The invention belongs to the technical field of analysis, and discloses a method for detecting the purity of 3-chloromethyl-1, 2, 4-triazoline-5-one. The detection method comprises the following steps: dissolving 3-chloromethyl-1, 2, 4-triazoline-5-one in a diluent to obtain a control sample solution; dissolving a to-be-detected sample in the diluent to obtain a to-be-detected sample solution; taking the control sample solution, detecting by liquid chromatography, and recording a chromatogram A; taking the to-be-detected sample solution, detecting the to-be-detected sample solution by liquid chromatography, and recording a chromatogram B; and calculating the purity according to the chromatogram A and the chromatogram B. The conditions of the liquid chromatography comprise a mobile phase Aand a mobile phase B; the mobile phase A is a phosphate buffer solution and acetonitrile; the mobile phase B is acetonitrile; and the volume ratio of the phosphate buffer solution to acetonitrile in the mobile phase A is (950 + / -5): (50 + / -0.5). The detection method can accurately detect the purity of the 3-chloromethyl-1, 2, 4-triazoline-5-one in the to-be-detected sample.

The invention discloses a rod-shaped preform with a high length-diameter ratio and a preparation method of the rod-shaped preform, and solves the problem of non-uniform distribution of fiber reinforcements in thread teeth of a ceramic matrix composite bolt based on an existing preform. The preparation method comprises the steps of firstly, designing a fiber preform into a core structure and a cladding structure; and then determining the number of fiber bundles of the cladding and the core, uniformly distributing the unidirectional fiber bundles to form a bundle structure, and binding the bundle structure by adopting fused glass fibers in the spiral direction to form a unidirectional fiber bundle core structure; then weaving a fiber bundle cladding on the surface of the core body by adopting a weaving method so as to enable the core body unidirectional fiber bundle preform to be subjected to the pressure stress of the cladding woven preform; and finally, sewing the core body and the cladding preform by using the fine molten glass fibers to form a rod-shaped preform. According to the prepared novel rod-shaped preform structure with the high length-diameter ratio, uniform distribution of fiber reinforcements in the thread teeth can be achieved, the cladding thread teeth can have more excellent obdurability, and the fiber obdurability of the core body unidirectional fiber bundles can be fully exerted.

The invention relates to a stem cell growth factor ethosome containing penetration-promoting peptide and a preparation method thereof, which belong to the technical field of biomedical preparations, and the preparation method specifically comprises the following steps: collecting a stem cell culture supernate, and enriching stem cell secretion factors as a water phase; dissolving phospholipid, cholesterol and vitamin E with an alcoholic solution to obtain an oil phase; mixing the two phases to obtain a stem cell factor ethosome solution; homogenizing and unifying the particle size, and then mixing with a permeability-promoting peptide to obtain the stem cell growth factor ethosome containing the permeability-promoting peptide. The permeability-promoting peptide has the effect of further improving the permeability capacity of the ethosome to enable the ethosome to reach the deep layer of skin tissues, so that the curative effect of stem cell factors wrapped by the ethosome is enhanced.The ethosome produced according to the invention has the advantages of stable property, higher encapsulation efficiency and simple technological process, and is suitable for industrial production.

The invention discloses an aluminum acetylacetone cathode modified polymer solar cell and a preparation method thereof. In a light incident direction, the cell structure sequentially comprises an ITOglass substrate, a cathode modification layer, an active layer, an anode modification layer and a metal electrode. The cathode modification layer is an aluminum acetylacetone film. According to the invention, a prepared aluminum acetylacetone solution is processed on the ITO glass substrate through a solution processing method to form a film; annealing heat treatment is carried out to acquire thecathode modification layer; and the active layer, the anode modification layer and the metal electrode are sequentially prepared to acquire the aluminum acetylacetone cathode modified polymer solar cell. The preparation method has the advantages of simple process, low cost and good repeatability, and is beneficial to large-scale industrial production. According to the invention, aluminum acetylacetone is introduced as a cathode modification layer material in the polymer solar battery; efficient electron collection is realized; and the aluminum acetylacetone cathode modified polymer solar cellwith high photoelectric conversion efficiency is acquired.

The invention discloses a method for efficiently preparing deuterated acetonitrile by photoelectric integrated catalysis, which is characterized in that deuterium water which is cheapest and easy to obtain is used as a deuterium source, acetonitrile is used as a raw material, and a plurality of catalysts are used for synergism to react at room temperature for a plurality of hours. And after the reaction is finished, carrying out reduced pressure distillation and drying to obtain the deuterated acetonitrile. The deuteration rate of the deuterated acetonitrile is greater than 99.8% through high-resolution mass spectrometry detection, and the deuterated acetonitrile meets the standard of commercial deuterated acetonitrile.

The invention belongs to the technical field of preparation of thermoelectric materials and particularly relates to a microwave sintering synthesis method of an oxide thermoelectric material Ca3-xKxCo4O9. The microwave sintering synthesis method comprises the following steps of (1), firstly weighting CaCO3, K2CO3 and Co2O3 according to stoichiometric molar ratio in Ca3-xKxCo4O9, grinding, placing ground powder in a crucible, placing the crucible in a sintering furnace, heating to 820-880 DEG C, pre-sintering for 20-30 hours at a constant temperature, cooling to room temperature in the furnace and taking out; and (2) carrying out second grinding on pre-sintered powder, pressing to sheets, holding the sheets in a double crucible, placing the double crucible in a flattening microwave oven, heating the double crucible for 10-15 minutes at a power of 400-640W, cooling the double crucible to room temperature in the furnace, taking out and pressing into sheets to obtain the target product. The method is simple in operation, the reaction raw materials during the reaction are solid, the chemical components of a reaction product is easy to control, the reaction time is short, the cost is low and the large-scale batch production of the material is facilitated; and the thermoelectric parameter power factor of the product prepared by the method is higher than that of the product prepared by virtue of a high-temperature-furnace sintering method and the thermoelectric performance is more prominent.

The invention relates to the technical field of hydrotalcite material supported catalysts, in particular to an M-Ti hydrotalcite-based closed boron cluster MB x H x The preparation method and application of nano-scale precious metal, the specific steps are as follows: dissolving alkali in water, adding dropwise soluble titanium salt and closed boron cluster MB respectively at the same time x H x The solution was continuously stirred under nitrogen protection until the reaction was complete, and then aged to obtain M-Ti hydrotalcite-based closed boron clusters MB x H x ; M-Ti hydrotalcite-based closed boron cluster MB x H x Disperse in water, add soluble salt of precious metal, stir and react under ultraviolet light irradiation at 20-50°C, filter to obtain precipitate, wash and dry to obtain the M-Ti hydrotalcite-based closed boron cluster MB x H x Nanoscale precious metals. The invention utilizes the reducibility of closed boron clusters, in-situ supports nano-precious metal particles on the surface of hydrotalcite, and the precious metal is wrapped by boron clusters, which is more stable and not easy to fall off.

The present invention relates to a method for producing rice cake made of fresh fermented glutinous rice and yeast through collaborative fermentation and its processed products. The method comprises the following steps: first, using fresh fermented glutinous rice to ferment the rice milk with oxygen to obtain fermented rice milk with fresh fermented glutinous rice; Yeast is added to fermented rice milk for brewing fermented rice to carry out collaborative fermentation; finally, steaming and maturing are carried out to obtain the rice cake. The invention adopts the step-by-step synergistic fermentation method of fresh fermented rice and yeast to make rice cakes, and the synergistic cooperation of the two can effectively optimize the quality of rice cakes, making the product soft in texture, good in elasticity and toughness, smooth in taste, and rich in sweet and sour flavor, and can be effectively The product fermentation time is reduced, the production cycle is shortened, and industrialized production is helpful.