27results about How to "The preparation process is stable" patented technology

The invention relates to a bismuth scandate-lead titanate based piezoelectric ceramic material and a preparation method and application thereof, the chemical general formula of the bismuth scandate-lead titanate based piezoelectric ceramic material is (1-y) Bi (Sc (1-x) Mex) O3-yPbTiO3, Me is a late transition metal element, x is 0.03-0.3, and y is 0.63-0.64. Compared with the prior art, the piezoelectric anisotropy and the piezoelectric property of the piezoelectric ceramic are improved by doping the rear transition group metal element Me on the basis of the BiScO3-PbTiO3 binary system piezoelectric ceramic material, the piezoelectric constant d33 is greater than 500pC / N, and the piezoelectric anisotropy d33 / d31 is greater than 3.5.

The present application provides a foamed ceramic prepared by rare earth blast furnace slag and coal gangue and a preparation method thereof. The method of the present application includes ball milling raw materials including rare earth blast furnace slag, coal gangue, crushed silica, low melting point solid waste raw materials, and talcum powder until they pass through a 200-mesh sieve; adding water to the sieved raw materials and foaming agent for wet grinding to obtain a slurry; drying the slurry and grinding it to obtain a powder; spreading the powder in a mold and pressing it into a shape to obtain a molded blank; heating the molded blank to obtain a foamed ceramic. The preparation method of the present application adopts a direct sintering method to prepare foamed ceramics, which not only opens up a new way to mass-produce and high-value utilization of solid wastes such as rare earth blast furnace slag and coal gangue, but also solves the environmental pollution problem caused by solid wastes, and the prepared foamed ceramics have excellent performance.

The utility model relates to a kind of three-phase voltage transformers of compartment, including shell and first, second single-phase mutual inductor, the top of shell is arranged three-phase, each phase includes a root of fusing tube, shell also includes three internal fusing tubes, the inner wall of the tube bottom of each internal fusing tube is arranged with spring contact finger, fuse is placed in tube, second nut is installed in tube mouth, the primary winding of first, second single-phase mutual inductor is electrically connected with first to fourth electrically conductive pole respectively, define three fusing tubes as first to third fusing tube, the other end of first electrically conductive pole is electrically connected with the spring contact finger of first fusing tube, the other end of second electrically conductive pole, third electrically conductive pole is electrically connected with the spring contact finger of second fusing tube, the other end of fourth electrically conductive pole is electrically connected with the spring contact finger of third fusing tube. Utilize a kind of three-phase voltage transformers of compartment designed by the utility model, can solve the problem of traditional three-phase voltage transformer common fusing tube, compact structure, increased operation and maintenance difficulty, reduced replacement efficiency.

This invention discloses a heating-not-burning cigarette cooling unit containing a phase change cooling material and a heating-not-burning cigarette. The unit comprises at least a carrier paper and a phase change cooling material coated on the carrier paper. The phase change cooling material is distributed in a non-fully-covering, regular pattern on the carrier paper. The carrier paper coated with the phase change cooling material forms multiple longitudinally extending channels through winding, folding, gathering, bending, and wrinkling, and has a porosity of 40%-90% along the longitudinal direction. The phase change cooling material comprises 55-96 parts by weight of polyethylene glycol, 1-5 parts by weight of in-situ reinforcing material, and 3-40 parts by weight of thermally conductive filler. The heating-not-burning cigarette cooling unit of this invention has the advantages of high latent heat of phase change, low thermal hysteresis effect, high heat absorption efficiency, apparent stability without collapse, and no leakage.

The invention relates to the technical field of lithium batteries, in particular to a metal lithium negative electrode interface protection layer, a preparation method and application of the metal lithium negative electrode interface protection layer in a lithium battery, the interface protection layer comprises orthophosphate AxPO4, an organic polymer and a conductive carbon material, the mass of orthophosphate AxPO4 accounts for 40-70% of the total mass, the mass of the organic polymer accounts for 5-30% of the total mass, and the mass of the conductive carbon material accounts for 5-30% of the total mass. And the mass of the conductive carbon material accounts for 10-50% of the total mass. When the protective layer is applied to the lithium battery, orthophosphate AxPO4 can be decomposed in the first charging process to generate lithium phosphate and A, and alloying / dealloying reaction, namely generation and decomposition of Li3 / xA alloy, is carried out in subsequent circulation, so that the high activity of a lithium metal negative electrode is ensured, the dendritic crystal growth problem is inhibited, the service life of the battery is prolonged, and the safety of the battery is improved.

The invention discloses a high-hardness corrosion-resistant iron-based amorphous alloy and a preparation method thereof, and belongs to the technical field of amorphous alloy materials. The iron-based amorphous alloy comprises the following components in percentage by mass: 20%-24% of Cr, 3%-7% of Mo, 3.6%-4.0% of B, 0.3%-0.7% of C, 1.0%-1.4% of Si, 1%-5% of Al, 1%-3% of Nb and the balance of Fe. The corrosion resistance is enhanced through the synergistic effect of Mo and Cr; b is a core amorphous forming element; c is used as a metalloid small atom, so that the amorphous forming ability of an alloy system is improved; si and B synergistically improve the amorphous forming ability and participate in formation of a Si-O passivation film at the same time; al optimizes the flowability of the alloy melt; nb is used as a large atom to improve the atom mismatch degree of a system and improve the amorphous forming ability; by accurately regulating and controlling the mass ratio of Fe, Cr, Mo, B, C, Si, Al and Nb, collaborative optimization of amorphous forming ability, hardness, corrosion resistance and forming stability is realized, meanwhile, the preparation process is simplified, and the production cost is reduced.

The invention relates to the technical field of catalysts, in particular to a palladium-nickel catalyst for synthesizing vinyl acetate and a preparation method thereof.According to the catalyst, a composite carrier of nanometer aluminum oxide and a ZSM-5 molecular sieve serves as a carrier, Pd and Ni serve as bimetallic main active components, and potassium acetate and La2O3 serve as auxiliary active components. The preparation method comprises the key steps of carrier pretreatment, step-by-step impregnation loading of active components, roasting activation in an acetic acid-containing partial pressure atmosphere and the like. A Pd-Ni system is adopted to replace a traditional expensive Pd-Au system, the cost of precious metal is remarkably reduced by 40%-50%, meanwhile, the catalytic activity, selectivity and stability of the catalyst are comprehensively improved through the synergistic effect of all the components, and the catalyst is particularly suitable for industrial production of synthesizing vinyl acetate through an ethylene gas phase method.

This invention discloses a tungsten-copper electronic paste for medium-temperature co-fired ceramic substrates and its preparation method, belonging to the field of electronic pastes. By mass percentage, the paste consists of 80%–85% tungsten-copper powder, 5%–15% organic carrier, and 5%–10% binder phase. The preparation method includes: first preparing the organic carrier, then uniformly mixing the tungsten-copper powder and binder phase, followed by adding the organic carrier, and then thoroughly grinding and dispersing the mixture using a stirring and three-roll mill to obtain a uniform and stable tungsten-copper electronic paste. This invention, by optimizing the powder size and paste ratio, significantly reduces the sheet resistance of the conductive layer after sintering and improves conductivity while ensuring good co-firing compatibility with medium-temperature co-fired ceramics. The resulting paste exhibits excellent printability and rheological stability, with clear printed lines and a smooth surface. It shows no bubbling or delamination during sintering and is suitable for high-performance, high-reliability electronic packaging and substrate circuit manufacturing.

The invention provides a modified lithium-rich manganese-based positive electrode material, a preparation method thereof and a solid-state battery. The method comprises the following steps: mixing a manganese source, a nickel source and a cobalt source, adding deionized water and a dispersing agent into the mixture, adjusting the pH value to 8.5-11.5, carrying out coprecipitation reaction at 40-80 DEG C for 12-36 hours, filtering, washing and drying to obtain a manganese-based precursor; carrying out ball-milling mixing on the manganese-based precursor, a lithium source, a main doping agent and an auxiliary doping agent to obtain mixed powder; heating the mixed powder to 800-1050 DEG C under the protection of inert gas, and keeping the temperature for 8-16 hours; according to the modified lithium-rich manganese-based positive electrode material, the structural stability is improved, the electrochemical performance of the material is optimized, the specific capacity and the cycling stability are improved, the rate capability is improved, and meanwhile, the interfacial compatibility with a solid electrolyte is improved. The solid-state battery based on the material has excellent comprehensive performance, the preparation process is simplified, the cost is reduced, and the material is suitable for large-scale industrial production.

The application belongs to the field of medicine crystallization, and discloses a new crystal form II of Morlidstat and a preparation method thereof. P The crystal form II of Morlidstat is a triclinic crystal, a with a cell parameter of: b = 6.0316 Å, c = 7.2911 Å, α = 16.1027 Å, β = 101.098°, gamma = 90.447°, = 104.418°. The preparation process of the crystal form II of Morlidstat is simple, stable and highly reproducible. The crystal form II of Morlidstat obtained by the process is stable in crystal form, color and morphology under the condition of 30±5°C and 40±5% RH for 30 days, and the crystal form stability is significantly improved compared with the original crystal form, so that the crystal form II of Morlidstat is suitable for the manufacture and long-term storage of drug preparations. Compared with the Morlidstat sodium salt in the prior art, the crystal form II of Morlidstat has moderate solubility, so that the abnormal bioavailability caused by excessively high solubility can be avoided.

The invention discloses a triacetylandrographolide nanocrystal and its preparation and application. The triacetylandrographolide nanocrystal is mainly composed of triacetylandrographolide, a stabilizer and an excipient. The average particle size of the drug particles in the triacetylandrographolide nanocrystal suspension obtained by redissolving in water is less than 500 nm, and the PDI is less than 0.2. The triacetylandrographolide and the stabilizer are prepared into a nanocrystal suspension by a high-speed shear antisolvent method combined with a high-pressure homogenization method, and then the excipient is added and spray-dried. The triacetylandrographolide nanocrystal can significantly improve drug absorption and improve its bioavailability. It can be further processed into solid preparations, liquid preparations and semisolid preparations. It can be used for the treatment of lung injury-related diseases through oral administration, pulmonary inhalation, injection or local administration, especially in the treatment of chronic obstructive pulmonary disease, it can significantly improve lung ventilation function, inhibit pathological changes in alveoli and airway walls, downregulate the level of lung tissue protease, significantly reduce the number of lung inflammatory cells and the secretion of inflammatory factors, and inhibit the infiltration of inflammatory cells in lung tissue.

This invention relates to a hydrogen peroxide electrochemical sensor electrode, its preparation method, and its application. The invention first prepares a monolayer of MXene, and then uses it to prepare an MXene / Co mixture via a hydrothermal method with cobalt acetate tetrahydrate. 3 O 4 The nanocomposite material was then used to modify a glassy carbon electrode. This invention utilizes MXene and Co... 3 O 4 The composite material not only possesses excellent catalytic ability for hydrogen peroxide, but the presence of MXene also enhances its electron transfer-promoting ability, thereby improving catalytic efficiency. This composite material exhibits excellent hydrogen peroxide detection capabilities, with a good linear relationship between the obtained hydrogen peroxide concentration and current value, enabling quantitative detection of hydrogen peroxide content. The process of this invention is simple, stable, and low-cost; the detection limit for hydrogen peroxide reaches 0.196 μmol / L, demonstrating good detection performance and anti-interference ability.

The invention belongs to the field of medical instrument biological materials, and particularly relates to a degradable low-immunogenicity biological anti-adhesion material, a preparation method and application thereof and a bioremediation patch. The preparation method comprises the following steps: carrying out pretreatment, antigen removal and freeze drying on small intestines of pigs to obtain the biodegradable immunogenic biological anti-adhesion material. The preparation process is stable and the product is easy to preserve. The material has appropriate mechanical properties and an excellent antigen removal effect, and the DNA residual quantity is 24 ng / g. The material has good biocompatibility and low immunogenicity when being used for preventing adhesion after the abdominal cavity operation, and does not cause obvious postoperative immune response after being implanted; good attaching performance is achieved, and suture fixation is not needed after the dressing is attached to a wound; the film is degradable and absorbable, and can be completely degraded in the periphery; the degradable biological anti-adhesion material has a good anti-adhesion effect and is an excellent degradable biological anti-adhesion material. The application of the acellular matrix material in an implantable medical material is promoted, and the prospect is good.

The application belongs to the technical field of biological medicine, and particularly relates to a Brucella recombinant multi-epitope vaccine and application thereof. The application provides a Brucella recombinant multi-epitope vaccine protein, and the vaccine protein is a first vaccine variant rBMEV1 or a second vaccine variant rBMEV2. The results of examples prove that the vaccine provided by the application can stimulate a strong cross immune response against main pathogenic species (such as sheep species, bovine species and porcine species) of Brucella. Animal tests prove that the vaccine can induce high-level and long-lasting specific antibodies, and significantly activate CD4 + and CD8 + T cells and corresponding cytokine responses, and has good safety. The application solves the problems of a narrow protection spectrum, a dependence on exogenous adjuvants and a single immune type of a traditional Brucella vaccine, and provides a new generation of high-efficiency, broad-spectrum and safe candidate vaccine strategy for the prevention and control of brucellosis.

The utility model relates to a continuous feeding device for non-circular bars with a single feeding cylinder and friction stir deposition additive manufacturing equipment. The device comprises a stock bin, a plurality of metal bars are stored in the stock bin, a bar outlet is formed in the bottom of the stock bin, and a vertical pushing arm is arranged on the top of the stock bin; the feeding cylinder is initially located under the stock bin and is provided with a feeding channel; the push rod is arranged right above the feeding channel of the feeding cylinder; the feeding barrel rotation driving motor is used for driving the feeding barrel to rotate around the axis of the feeding barrel; the controller controls the metal bars in the stock bin to fall into a feeding channel of the feeding barrel by controlling the vertical pushing arm to move downwards; then the rotating speed and the phase position of the feeding cylinder are adjusted by controlling the feeding cylinder to rotate a driving motor; and finally, the push rod is controlled to move downwards to control the feeding barrel to release the metal bar. The metal bars are received and released through the single feeding cylinder in a time-sharing mode, and continuous automatic feeding under the condition that equipment is not stopped is achieved.

This invention provides a sealing material for intermediate-temperature solid oxide fuel cells and its preparation method, relating to the technical field of sealing materials for solid oxide fuel cells. The sealing material, by molar percentage, comprises SiO2: 5-25%, Al2O3: 5-15%, B2O3: 25-35%, CaO: 15-25%, MgO: 10-20%, BaO: 0-15%, and NiO: 0.1-10%. This invention achieves a sealing material with an expansion coefficient and operating temperature matching the sealing requirements of solid oxide fuel cells by rationally adjusting the proportions of SiO2, B2O3, CaO, BaO, and MgO. Compared to common borosilicate glass, this invention adds a certain amount of NiO. Experiments show that NiO can form strong chemical bonds with Ni-based YSZ ceramic anode supports, resulting in better compatibility and improved bonding strength between the sealing material and the anode.

The invention discloses a hard alloy and a preparation method and application thereof, the hard alloy comprises a hard phase and a binding phase, the hard phase is (W, Re) C, the binding phase comprises one or two of Ru and Os, Co and Re, the mass of the solid solution Re in the hard phase accounts for 50%-90% of the total Re mass in the hard alloy, and the atomic percent of the total Re / Co in the hard alloy is not larger than 25%. The preparation method comprises the following steps: taking M alloy powder, tungsten-rhenium alloy powder, WC powder and carbon powder as raw materials, carrying out pre-ball-milling and ball-milling, and carrying out drying granulation, molding and sintering on the mixture to obtain the hard alloy. The hard alloy has high hardness, high toughness and good high-temperature performance, is excellent in comprehensive mechanical property and can be well applied to preparation of hard alloy tools.

The application discloses application of a migration body in preparation of a medicine for inhibiting osteoclast differentiation or promoting osteogenesis. The application significantly improves the secretion amount of the migration body by optimizing cell culture conditions, realizes large-scale preparation, and greatly reduces production cost. The application also enriches active ingredients in the migration body by pressure stimulation, so that the migration body has more excellent effect of promoting bone defect repair. In addition, the migration body has larger size and a stable film structure, prolongs in-vivo retention time, realizes long-acting repair by single administration, and further solves the long-acting and clinical transformation problems. The migration body has wide application prospect in the field of bone defect repair.

The chemical composition of the titanium-based amorphous brazing filler metal is TiaZrbNicCudYeBfLagSih, and the stoichiometric ratios of all the elements are as follows: 43 < = a < = 77, 20 < = b < = 28, 12 < = c < = 18, 6 < = d < = 13, 0.8 < e < = 1.6, 0.2 < f < = 0.9, 1.0 < g < = 1.6 and 0.3 < h < = 0.9. According to the titanium-based amorphous brazing filler metal, through component regulation and control, comprehensive improvement in the aspects of low-temperature welding, flow wettability and welding strength reliability is successfully achieved.

The invention discloses a nanometer synapse integrated device and a preparation method thereof. The nanometer synapse integrated device comprises a substrate; the insulating layer is arranged on the substrate; a plurality of nano synaptic units arranged on the insulating layer; the nano synapse unit comprises a first microelectrode and a second microelectrode which are oppositely arranged, and a GaN-based nanowire arranged between the first microelectrode and the second microelectrode, the first end of the GaN-based nanowire is connected to the first microelectrode in a bonding manner, and the second end of the GaN-based nanowire is connected to the second microelectrode in a bonding manner. According to the invention, the GaN-based nanowire is used as a synaptic element in the device, and the GaN-based nanowire has a controllable direct band gap and stable physicochemical properties. In the nano-synapse integrated device, the plurality of nano-synapse units are integrated on the same substrate, so that the nano-synapse integrated device can be prepared on a large scale, and is small in size and high in integration level; and the plurality of nano synapse units can be independently controlled or can be subjected to overall array control according to an arranged array pattern.

The invention relates to a ferrocene metal organic framework / carbon-based material composite membrane, a polymerase chain reaction photo-thermal module and application thereof. The ferrocene metal organic framework / carbon-based material composite film is prepared by performing suction filtration and film forming on dispersion liquid containing a carbon-based material and a ferrocene metal organic framework. And the polymerase chain reaction photo-thermal module can realize the control of temperature rise and / or temperature reduction based on the regulation and control of the irradiation power of the light source. Compared with the prior art, the ferrocene metal organic framework / carbon-based material composite membrane and the polymerase chain reaction photo-thermal module can realize efficient photo-thermal conversion under the irradiation of a light source, have the characteristics of excellent heating and cooling rate and low power consumption, and provide a new solution for rapid pathogen detection.

The invention relates to the technical field of wood production, and discloses a wood core laminated wood unit body continuous preparation device which comprises a machine table, a clamping module and a wood shaping module are arranged in the machine table, and the clamping module comprises a front-section clamping module and a rear-section clamping module; the front section clamping module and the rear section clamping module are arranged on the front section and the rear section of the machine table respectively. The wood shaping module comprises a first shaping gear set, a second shaping gear set and a third shaping gear set. According to the continuous preparation device for the wood core laminated wood unit bodies, wood is subjected to three-step cutting through the first shaping gear set, the second shaping gear set and the third shaping gear set, so that the requirement for preparation of the wood core laminated wood unit bodies is met; and continuous conveying of the wood is achieved through the clamping module, and continuous preparation and stacking of the bus laminated wood unit bodies are achieved.

The application discloses a preparation method and application of a composite modified biochar filler, and the preparation method comprises the following steps: S1, pyrolysis treatment, S2, modification treatment, and S3, secondary calcination; the application is applied to a heavy metal-antibiotic cooperative removal system; the biochar filler prepared through the three-stage temperature control pyrolysis combined with the NH3 activation modification process has the characteristics of large specific surface area, high mechanical strength and excellent magnetic separation performance, and can effectively remove heavy metal-antibiotic composite pollution.

The present invention relates to the technical field of solar cells, and provides a perovskite solar cell and a preparation method thereof, wherein the perovskite solar cell comprises a substrate, a DMD transparent electrode layer, a hole transport layer, a perovskite light absorption layer, an electron transport layer and a metal electrode layer stacked in sequence; wherein the DMD transparent electrode layer comprises a first dielectric layer, a metal layer and a second dielectric layer stacked in sequence, and the second dielectric layer is connected to the hole transport layer; the first dielectric layer and the second dielectric layer are both one of a tin-doped indium oxide film, a fluorine-doped tin oxide film and an aluminum-doped zinc oxide film; the metal layer is one or more of Au, Ag and a slightly oxidized nano-Ag film. The perovskite solar cell provided by the present invention finely controls the growth of each layer by analyzing the material properties of each layer and setting the thickness of each layer, and finally blocks ultraviolet light and mid-to-far infrared light, thereby improving the stability of the perovskite solar cell.

This invention discloses a method for preparing yttrium-magnesium oxide (YMO) multiphase transparent ceramics using non-aqueous gel casting, belonging to the field of ceramic preparation technology. To overcome the problems associated with water-based gel casting, this invention provides a method for preparing YMO multiphase transparent ceramics using non-aqueous gel casting, comprising: ball milling Y2O3, MgO, a dispersant, and a non-aqueous solvent; then adding epoxy resin and a curing agent and ball milling again; the resulting ceramic slurry is defoamed, cured, and dried; then subjected to debinding, sintering densification, cooling, hot isostatic pressing, annealing, and polishing to obtain the YMO multiphase transparent ceramic. This invention overcomes the difficulties in preparing large-size Y2O3-MgO nano-multiphase infrared transparent ceramics and the problem of component inhomogeneity by designing a non-aqueous solvent system and selecting a suitable gel system, and can produce complex-shaped / large-size, uniformly composed YMO nano-multiphase ceramics.

The present disclosure relates to an oil filtering material, a preparation method and application thereof, and the raw materials of the oil filtering material include, in terms of mass percentage, 30-60% of water-absorbing material, 30-60% of thermoplastic elastomer material, 5-10% of compatibilizer and 1-5% of inorganic filler. The preparation method includes: mixing a certain proportion of the water-absorbing material, the thermoplastic elastomer material, the compatibilizer and the inorganic filler to obtain a mixture; plasticizing the mixture to obtain a melt; vulcanizing the melt to obtain a vulcanizate; crushing the vulcanizate to obtain a water-absorbing swelling material; uniformly laying the water-absorbing swelling material on a porous material and performing hot-pressing compounding to obtain the oil filtering material. The oil filtering material, the preparation method and application thereof have low cost, simple preparation process, and can improve the filtering effect of oil, especially vehicle ethanol gasoline, and prolong the service life of the oil filtering material.

The application relates to a high-gloss high-weather-resistance ASA-PMMA composite material and a preparation method thereof, and belongs to the technical field.The application comprises the following components in parts by weight: PMMA resin 40-65 parts, ASA resin 25-50 parts, a novel composite compatibilizer 3-8 parts, a composite anti-aging agent 2-5 parts, a lubricating dispersing agent 0.5-2.5 parts, a nano modifier 0.1-1 part, an antioxidant 0.2-0.8 part and an anti-yellowing agent 0.3-1.2 parts.The novel composite compatibilizer, the composite anti-aging system and an optimized preparation process are fused, the component proportion is accurately controlled, the synergistic promotion of high gloss, high weather resistance and excellent mechanical properties is realized, the process is simple, the cost is controllable, the prior art route is avoided, and the application has obvious innovation advantages and practical value.