37results about How to "Conducive to the realization of large-scale industrial production" patented technology

The invention relates to a high-early-strength-type alkali-free liquid accelerator and a preparation method and application thereof, and belongs to the technical field of additives of building materials. The accelerator is prepared from, by weight, 40-50% of polyaluminium sulfate, 5-10% of metakaolin, 5-15% of nanometer colloidal silica, 3-6% of alcohol amine, 1-4% of organic acid, 0.01-0.05% of athickening agent, 0.01-0.05% of a dispersion agent and the balance water. On the basis of meeting the national standard of <accelerators used for shotcrete> (GB/T35159-2017), the accelerator can effectively improve the compressive strength of cement mortar after one day, the compressive strength reaches 20 MPa or above, and the compressive strength of partial cement mortar can even reach 25 MPa or above after one day.

The invention discloses an aluminum alloy substrate thick film circuit middle-temperature sintering dielectric paste and a preparation method thereof. The preparation method is used for preparing the aluminum alloy substrate thick film circuit middle-temperature sintering dielectric paste. The aluminum alloy substrate thick film circuit middle-temperature sintering dielectric paste comprises the following materials in part by weight: 60%-80% of lead-free microcrystalline glass powders, 1%-10% of rare earth oxide and 19%-30% of organic bonding phase, wherein the lead-free microcrystalline glass powders are formed by SiO2, Bi2O3, B2O3, ZnO, K2O, SrO2 and CaO; and the organic bonding phase is a mixture formed by an organic solvent, a high-polymer thickener, a surfactant, a plasticizer, a dispersant, an antifoaming agent and a thixotropic agent. A dielectric layer formed by printing the dielectric paste on an aluminum alloy substrate has the advantages of large adhesive force, large breakdown strength and high insulation resistance, and is capable of being compatible with a thick film circuit of the aluminum alloy substrate with a resistance paste and an electrode paste.

The invention discloses a catalyst for decomposing ozone, and a preparation method of the catalyst. The catalyst is prepared from diatomaceous earth and Fe-doped manganese oxide loaded on the diatomaceous earth, wherein the mass of Mn element in the manganese oxide accounts for 2-10% of the total mass of the catalyst. The preparation method of the catalyst comprises the following steps: (1) soaking the diatomaceous earth into a mixed solution of manganese acetate and iron salt, and enabling the diatomaceous earth to be evenly dispersed in the solution, wherein the adding amount of the diatomaceous earth is 25-200g/L; (2) separating the diatomaceous earth out from the solution, drying and then calcining to obtain the catalyst.

The invention relates to a doped silicate sodium ion battery positive electrode material and a preparation method thereof, and belongs to the field of chargeable battery positive electrode materials in energy materials. The formula of the positive electrode material is Na<2(1-x)>Mg<x>FeSiO4; x=0-0.05. The preparation method comprises the following steps: precisely weighing a sodium source compound, a magnesium source compound, an iron source compound, and a silicic acid radical source compound according to a mole ratio of Na:Mg:Fe:SiO4<2->=2(1-x):x:1:1; adding a proper amount of deionized water, evenly mixing the raw materials through ball milling, pre-burning the mixture in inert gas, grinding the obtained solid after pre-burning, then mixing the powder with a carbon source compound, adding a proper amount of deionized water to form a rheology state so as to obtain a rheology precursor; and finally burning the precursor in an inert atmosphere to obtain magnesium doped sodium silicate battery positive electrode material (Na<2(1-x)>Mg<x>FeSiO4). The positive material has a good cycle performance, and has a wide application prospect as a novel sodium ion battery positive electrode material.

The invention discloses a thick-film circuit resistance paste for a stainless steel substrate and a preparing method thereof. The thick-film circuit resistance paste is composed of two parts of a solid phase component and an organic liquid phase; the solid phase component comprises a conductive phase and a microcrystalline glass phase, the conductive phase is composed of Cu2O-GeO2 compound +Cu powder, and the microcrystalline glass phase is a SiO2-Al2O3-B2O3-CaO-ZrO2-Co2O3 compound; and the organic liquid phase is a mixed liquid phase of terpineol, tributyle citrate, ethyl cellulose, span 85, 1,4-butyrolactone and a hydrogenated castor oil. The preparing method of the thick-film circuit resistance paste comprises firstly preparing the conductive phase and the microcrystalline glass phase respectively, preparing the organic liquid phase then, finally performing mixing modulation of the conductive phase, the microcrystalline glass phase and the organic liquid phase, and then the resistance paste can be obtained.

The invention discloses an amorphous glass powder, and a preparation method and applications thereof. The amorphous glass powder comprises following raw materials, by mass, 10 to 60% of BaO, 1 to 30% of Al2O3, 5 to 40% of B2O3, 5 to 40% of P2O5, 1 to 10% of MoO3, 1 to 5% of NiO, and 1 to 10% of Nd2O3. The preparation method comprises following steps: the raw materials are mixed at the ratio; the mixture is heated to 1200 to 1650 DEG C, and the temperature is kept for 0.5 to 8h; and the mixture is subjected to water quenching, and is grinded into powder with a diameter of 0.5 to 5 microns by ball milling so as to obtain the amorphous glass powder. A slurry made of the amorphous glass powder and an organic carrier possess excellent adhesiveness on stainless steel substrates; the breakdown voltage of the slurry is high, and insulating properties of the slurry are excellent; and the slurry is capable of meeting the requirements for thick film circuit insulating medium materials of high-power stainless steel substrates.

The invention discloses sheet-shaped aluminium oxide-containing aluminium-based dielectric paste and a preparation method therefor. The aluminium-based dielectric paste comprises the following components based on mass percentages: 40-70% of low-melting-point glass powder, 0-30% (not including 0) of sheet-shaped aluminium oxide powder, 20-40% of organic carrier and 0-3% of coloring agent. The aluminium-based dielectric paste has the following advantages: 1, the thermal expansion coefficient of low-melting-point glass is greater than 16*10<-6>m/K, so that an aluminum substrate can be well matched; the melting point of the low-melting-point glass powder is less than 600 DEG C, so that the low-melting-point glass powder can be sintered at an aluminium melting point; 2, by virtue of the addition of the sheet-shaped aluminium oxide powder, corrosion resistance, oxidization resistance, thermal resistance, heat-conducting property and electrical insulating performance of the dielectric layer are effectively improved; and 3, an insulating dielectric layer prepared from the insulating dielectric paste and the metal aluminium substrate are high in binding force, breakdown voltage and insulating property. The preparation method comprises the steps of preparing the low-melting-point glass powder, preparing the organic carrier and prepparing the dielectric paste.

The invention belongs to the technical field of battery materials, and concretely relates to a method for preparing a magnesium ion battery positive electrode material. The magnesium ion battery positive electrode material is carbon coated magnesium ferrous borate, wherein the magnesium ferrous borate mainly comprises a magnesium source compound, a ferrous source compound and a borate radical compound. The magnesium ferrous borate synthesized from common raw materials in the invention is a novel magnesium ion battery positive electrode material having an extremely rich source and an excellentapplication prospect. Compared with currently widely studied phosphate polyanion compound magnesium ion battery positive electrode materials, the positive electrode material in the invention achievesa higher theoretic specific capacity by replacing a phosphate radical having a large mole with a borate radical having a small mole from structural analysis. The electric conduction capability of ferrous borate is stronger than that of ferrous phosphate, the volume change rate of the ferrous borate before and after discharge is lower than that of the ferrous phosphate before and after discharge and is less than half of that of the ferrous phosphate, so the magnesium ferrous borate positive electrode material has good rate performances and a good cycle stability.

The invention relates to the field of capacitor manufacturing, and discloses a method for preparing a porous aluminum foil for a current collector of a lithium ion capacitor. The aluminum foil is used as a raw material, and a direct current electrolytic oxidation method is adopted. The steps are as follows: use inert graphite as a cathode, and use the aluminum foil as an anode pair The aluminum foil is subjected to one-step electrolysis to produce pores and expand pores; the aluminum foil after the above treatment is sequentially cleaned, post-treated and electrolyzed, and washed twice to obtain a porous aluminum foil. The method of the invention has simple process and low cost, and is suitable for industrial production.

The invention relates to a doped modified lithium ion battery vanadate negative electrode material and a preparation method thereof, and belongs to the field of lithium ion battery material preparation. The doped modified lithium ion battery vanadate negative electrode material is composed of an iron source compound, an antimony source compound, a vanadate source compound and a fluorine source compound according to a molar ratio of Fe:Sb:VO4<3->:F being x:y:1:z, wherein x ranges from 0.5 to 0.9, y ranges from 0.1 to 0.5, and z ranges from 0.01 to 0.1. Vanadate is used as a main body framework,iron ions and antimony ions with different ion radiuses and electronic structures and fluorine ions with a relatively small radius and relatively strong electronegativity are mutually doped, the distribution of an electric field in a unit cell is changed, a lithium ion intercalation and deintercalation channel in a crystal is expanded, the migration rate of lithium ions is improved, and the impact of lithium ions on a crystal structure due to the volume change of the crystal in the intercalation and deintercalation process is buffered, so that the lithium storage performance of the material is improved, and the cycle life of the lithium ion battery doped with the vanadate negative electrode material is greatly prolonged.

The invention discloses a method for preparing alpha iron sesquioxide. The method comprises the following steps: S1, preparing an aqueous solution of potassium ferricyanide; S2, carrying out a microwave hydrothermal reaction on the aqueous solution of potassium ferricyanide at a temperature of 170-220 DEG C for at least half an hour so as to obtain a solid-liquid mixture; and S3, performing solid-liquid separation on the solid-liquid mixture, and cleaning and drying a solid obtained, thereby obtaining alpha iron sesquioxide. According to the method disclosed by the invention, potassium ferricyanide serves as a raw material, the ferricyanide ion in potassium ferricyanide serves as an iron source, and nitrogen atoms in cyanogens are selectively adsorbed on the surfaces of particles due to lone pair electrons in the cyanogens, so that hexagonal flower-like crystal alpha iron sesquioxide is obtained. Compared with a traditional preparation method for regulating particle growth by using sulfate, chloride and other soluble iron sources as raw materials and adding at least one modifier, the method disclosed by the invention is simple in preparation process, and the preparation cost is reduced; the reaction conditions are easily controlled, and large-scale industrial production is realized; and meanwhile, the product is high in purity, high in yield, uniform in particle size and stablein performance.