16results about How to "The preparation process is stable" patented technology

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 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.

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 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 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 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.

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.