215results about How to "Change the microstructure" patented technology

The invention relates to a nano carbon doped electrocatalyst for a fuel cell, and application of the nano carbon doped electrocatalyst. The electrocatalyst is prepared by adopting the steps of: complexing a nitrogen-containing and/or boron-containing organic precursor and a transition metal salt to form a composite; adding nano carbon as a carrier, and heating and reacting a mixture by adopting a microwave radiation method; and after the reaction is complete, filtering and drying, placing a product obtained after the reaction in an inert atmosphere and/or reducing atmosphere, and treating at a high temperature of 500-1500 DEG C to obtain the nano carbon doped electrocatalyst. The nano carbon doped electrocatalyst is very low in cost, high in activity and stability and excellent in anti-poisoning capacity.

The invention discloses a hydrophilic modification method of a PVDF ultrafilter membrane by the utilization of nano-TiO2 sol and belongs to the field of membrane separation technologies. According to the method, PVDF is used as the main high-molecular membrane preparation material. The hydrophilic TiO2 sol prepared in advance is added into a casting solution containing PVDF, an organic solvent and an additive, and the hydrophilic PVDF ultrafilter membrane is prepared by the utilization of a phase inversion method. By the adoption of the method, water contact angle of the prepared PVDF ultrafilter membrane can be reduced from about 85 degrees to about 60 degrees, and hydrophilicity of the PVDF membrane is obviously raised. Various substances concerned in the invention comprise, by weight, 10-25% of polyvinylidene fluoride (PVDF), 60-80% of a solvent for dissolving polyvinylidene fluoride, 1-10% of the TiO2 sol, and 0-10% of the additive, wherein the additive contains a mixture of anhydrous LiCl and PVP. Porosity of the prepared membrane is 50-80% and its membrane pore size is 0.01-0.2 micron. The method provided by the invention has a simple membrane forming technology, is convenient to operate, and is easy to realize industrial production. In addition, the prepared ultrafiler membrane has good hydrophilicity and high water flux, and has a wide application prospect.

The invention relates to a rare-earth electrode slurry of rare-earth circuit, based on the metal base board and a relative production, wherein it is characterized in that: said slurry is formed by solid material and organic solvent carrier, while their mass ratio is 70-90:30-10; the solid component comprises: silver, palladium, and yttrium composite power and micro-crystal glass powder, while their mass percentage is 99.4-94:0.6-6; said composite power is formed by silver, palladium, and yttrium powders at the ratio as 0.6-10:99-82:0.4-8; said micro-crystal glass is the one in SiO2-Al2O3-CaO-B2O3-Bi2O3-La2O3 group. And the production comprises: (1), preparing rare-earth micro-crystal glass powder; (2), preparing silver, palladium, and yttrium composite powder; (3), preparing organic solvent carrier; (4), mixing material in three-dimension and rolling with three rollers; (5), preparing the rare-earth slurry; (6), bottling. The invention is environment friendly and better humidity compatibility.

The invention is concerned with a method to increase extraction efficiency of semiconductor LBD by texturing film transfer. Develop conventional semiconductor LBD, weld the core of flip semiconductor LBD, product template with micro/nanometer-figures by the designed light-etched domain, select and confect a kind of prepolymer in appropriate proportion and print the ultrastructure figure on the prepolymer colloid with micro/nanometer print technology and solidify the prepolymer colloid film, peel off the prepolymer film with ultrastructure figure and get the texturing film medium film. The step of texturing film transferring is spreading transparent PMMA glue on underlay of LBD, setting the side of texturing film with figure upside and pasting on the core of diode, setting the side of texturing film with figure peeled off upside and pasting on the core of diode, adding proper temperature to solidify the transparent agglutinating glue.

The invention discloses a composite biological material capable of injecting bioglass-calcium phosphate bone cement and a preparation method thereof. The prepared composite biological material capable of injecting bioglass-calcium phosphate bone cement is composed of solid phase powder and liquid phase, wherein, the liquid phase is monopotassium phosphate and dipotassium phosphate water solution which the concentration is 1M, and the ratio between the solid phase powder and the liquid phase is 2.0 g/ml-3.0 g/ml; the solid phase powder is composed of calcium phosphate bone cement and 45S4 bioglass in a mixed mode based on a weight ratio, wherein the addition of the 45S5 bioglass accounts for 5%-40% of the gross of the solid phase powder; and the calcium phosphate bone cement is composed of tetra calcium phosphate and anhydrous calcium phosphate dibasic in a mixed mode with a 1:1 molar ratio. The composite biological material capable of injecting bioglass-calcium phosphate bone cement and the preparation have the advantages of being capable of having good liquidity, higher mechanics performance, degradation rate and biological activity, offsetting the defects of single calcium phosphate cement (CPC) or the bioglass, and being used for bone defect recovery of an oral cavity, a skull facial portion and orthopedics.

The invention discloses a high-temperature high-power rare earth resistance paste and a preparation method thereof. The high-temperature high-power rare earth resistance paste comprises a functional phase, an inorganic adhesive phase, a burning promoter and an organic carrier, wherein the functional phase is composite powder consisting of micrometer silver powder and bismuth ruthenate powder; the inorganic adhesive phase is lead-free pyroceram powder consisting of SiO2, MgO, B2O3, ZnO, Bi2O3, rare earth oxides and a nucleation agent; and the organic carrier is a mixture consisting of a solvent, resin, a dispersing agent, a deforming agent and a thixotropic agent. The resistance paste has the advantages that firstly, the damages of lead on the environment and human bodies can be avoided; secondly, the resistance paste is high in compatibility, wettability, thermal performance, electrical performance, manufacturability and adaptability; thirdly, the resistance paste is high in binding performance with ceramic and stainless steel substrates; and fourthly, the resistance paste is high in printing performance, burning performance and compatibility. The preparation method comprises preparation of the inorganic adhesive phase, preparation of the functional phase, preparation of the organic carrier and preparation of the resistance paste in sequence, and the resistance paste can be produced and prepared effectively.

The invention discloses high bending force resistant permanent magnet materials and a preparation method thereof. The magnet materials comprise, by weight, 22-30% neodymium, 4.4-6% praseodymium, 0.044-0.06% lanthanum, 2-5% boron, 0.044-0.06% molybdenum, 0.044-0.06% nickel, 0.044-0.06% rhenium, 0.044-0.06% scandium and the balance ferrum. The high bending force resistant permanent magnet materials are uniform in organization, strong in structure and capable of improving bending force resistant performance of the materials and magnetic performance. The preparation method of the magnet material takes full use of praseodymium-neodymium waste to directly produce raw materials used by alloy, composition proportion is flexible, quality is well controlled, cost is lowered, the process is simple and powder waste with high oxygen content is fully used.

The invention relates to a lead-free thick film nanometer gold electrode slurry which selects nanometer gold powder as a main functional phase, in particular to a thick film nanometer gold electrode slurry and a method for preparing the same. The thick film nanometer gold electrode slurry is characterized by comprising the following components by weight portion: 60 to 90 portions of inorganic part and 40 to 10 portions of organic solvent, wherein the inorganic part comprises the following components by weight portion: 90 to 98 portions of noble metal nanometer gold powder, 2 to 10 portions of lead-free glass powder and 0 to 6 portions of inorganic additive; and the organic solvent comprises the following components by weight portion: 40 to 90 portions of terpineol, 4 to 10 portions of ethyl cellulose, 3 to 30 portions of ethyl caproate, 1 to 6 portions of nitro cellulose, 1 to 25 portions of triethanolamine, and 1 to 6 portions of sodium dodecylsulphonate. The invention changes the microstructure of the gold electrode slurry so as to change the conductivity, the printing performance and the connecting firmness of the slurry, thus the application of the gold electrode slurry to electronic parts and components, in particular high precision electronic parts and components is greatly expanded.

The invention relates to a surface rust preventing treatment process for iron art products and provides a novel spraying line production technique. The surface rust preventing treatment process is characterized in that traditional phosphating is replaced by ceramic treatment on a spraying flow production line, common urban tap water is replaced by small cluster water with activity in each washing link during spraying, and common water base degreasing fluid is replaced by small cluster water base degreasing fluid. Compared with traditional phosphating, the method uses non-phosphorus ceramic treatment for pretreatment in prior to nano spaying, and accordingly adhesive force between coating and metal can be increased evidently, and corrosion-resistant time of metal can be prolonged.

The invention relates to a MnZn soft ferrite material and magnetic core used for an integrated energy-saving lamp and an electronic ballast; wherein the soft ferrite material comprises the Fe2O3 of 49mol% to 53 mol% and the MnO of 34mol% to 40mol%, and the rest ZnO. A first accessory component of CaCO3, one or both of the second accessory components of SiO2 and WO3, one but not only limited to one of the third accessory components of SnO2, TiO2, Nb2O5, V2O5, CoO are added to the principal component. The invention has the advantages that the MnZn soft ferrite magnetic core can be used for, but not only limited to the integrated energy-saving lamp and the electronic ballast field.

The invention provides a baking-free brick and a production method thereof. The soil and regenerated aggregate can be added into the manufacturing raw material as raw materials for brick making, cement is used as a gelling agent, the actions of admixtures and a fusion agent are used to package and blend the soil and the fusion agent, the waste residue and waste material is fully utilized, and thusthe prepared baking-free brick has the characteristics that the strength is high, the waterproof effect is good, the curing period is short, the application of raw materials is wide, the resource comprehensive utilization benefit is high, the cost is low, the production process is environment-friendly, the raw materials can be recycled and reused, and the like.

The invention relates to the technical field of magnetic materials, and discloses a method for preparing a rare-earth-doped manganese-zinc ferrite material, comprising the steps of adding manganese oxide, zinc oxide and iron oxide as main components to a ball mill and conducting ball milling to obtain a mixture A; pre-firing the mixture A, and then conducting cooling to room temperature to obtaina pre-fired material; adding the pre-sintered material, vanadium oxide, niobium oxide, bismuth trioxide, molybdenum oxide, phosphorus pentoxide, copper oxide and a composite rare earth additive into aball mill, and conducting secondary ball milling and drying to obtain a mixture B, wherein the composite rare earth additive is composed of cerium oxide, yttrium oxide and lanthanum oxide; adding a polyvinyl alcohol solution to the mixture B, conducting mixing and granulation, and then conducting sieving by a sieve of 40-80 mesh, so as to obtain pellets; adding the pellets into a molding machinefor pressing, so as to obtain a blank; and sintering the blank and conducting cooling. The rare-earth-doped manganese-zinc ferrite material prepared by the method of the invention has high initial magnetic conductivity and saturation magnetic flux density.

The invention discloses a heat-free sludge drying method and a device system thereof. The heat-free sludge drying method comprises the following technological steps: 1, sludge to be treated is conveyed into a stirring machine, a chemical conditioner and a physical conditioner are added, and mixing is performed until uniformity; (2) the uniformly mixed sludge is conveyed into a reaction tank, and stays for a certain time to ensure sufficient reaction; (3) after the reaction is completed, the sludge enters a squeezing device and is rapidly dehydrated; (4) the dehydrated mud cake enters a crusherand is crushed; (5) the crushed mud cake enters a drying bin and undergoes forced ventilation drying; and (6) the generated sewage enters a water treatment device and is treated. The dehydration process is short in time, and heating is not needed in the drying process; and the method has the advantages of high treatment efficiency, low energy consumption, low treatment cost, no secondary pollution and the like. The moisture content of the dried sludge cake is 20-40% and is adjustable, and the import requirements of various sludge final treatment processes can be met.

The invention relates to preparation and applications of a biocarbon supported thermally activated iron containing ore composite material. Thermally activated iron containing ores are loaded on the surface of biocarbon. The preparation method comprises following steps: grinding iron containing ores and a biomass material, then evenly mixing ores and the biomass material according to a certain massratio, evenly pressing and moulding the mixture, burning the mixture in a reductive atmosphere, naturally cooling, and milling the mixture in an anaerobic atmosphere to obtain fine powder, namely thebiocarbon supported thermally activated iron containing ore composite material. The prepared biocarbon supported thermally activated iron containing ore composite material has the characteristics oflarge specific surface area, high stability, and strong oxidizing-reducing activity. Compared with biomass or thermally activated iron containing ores, the composite material has a prominently improved performance on removing or stabilizing heavy metal ions in water and soil, and thus can be used to process heavy metal pollution of water and soil.

The membrane electrode in multiple layers is composed of anodic catalysis layer, membrane of electrolyte and cathodal catalysis layer. There is a layer of polymer dielectric between the membrane of electrolyte and the anodic catalysis layer, the cathodal catalysis layer. The layer of polymer dielectric can change microstructure of interface between the membrane of electrolyte and the anodic catalysis layer, the cathodal catalysis layer. The method includes steps: (1) preparing the layer of polymer dielectric; (2) preparing catalyst slurry; (3) preparing the anodic catalysis layer, the cathodal catalysis layer so as to obtain membrane electrode; (4) heat treating the membrane electrode obtained from step (3) so as to produce finished product. The invention improves binding force between catalysis layer and membrane of electrolyte, lowers contact resistance between membrane and electrode as well as enhances conduction of protons and electrons.

The invention discloses a low-loss soft magnetic ferrite material which comprises main materials and auxiliary materials, wherein the main materials comprise the following components in parts by mole: 57 to 60 parts of ferric nitrate, 40 to 42 parts of manganese nitrate, 9-12 parts of zinc nitrate and 8 to 10 parts of nickel nitrate; by using the total weight of the main materials as a reference, the auxiliary materials comprise the following components: 300 to 400 ppm of neodymium oxide, 300 to 400 ppm of vanadium oxide, 400 to 600 ppm of niobium oxide, 300 to 700 ppm of boron oxide, 50 to 200 ppm of calcium carbonate, 20 to 100 ppm of lithium carbonate, 20 to 80 ppm of barium carbonate, 250 to 800 ppm of silica, 2000 to 2500 ppm of an adhesive, 3*10<6> to 5*10<6> ppm of an adsorbent, 300 to 500 ppm of an emulsifier. The invention also discloses a method for preparing the low-loss soft magnetic ferrite material; the magnetic core is low in loss and the saturation induction density is high.

The invention belongs to the technical field of ceramic synthesis and provides a method for preparing a strontium lanthanum manganate/copper calcium titanate composite magnetoelectric ceramic materialby virtue of a sol-gel method. The method comprises the steps of respectively preparing lanthanum strontium manganite (LSMO) precursor powder, copper calcium titanate and CCTO precursor powder by virtue of the sol-gel method, mixing the LSMO precursor powder with the CCTO precursor powder, adding an adhesive, uniformly mixing, pressing to form a ceramic blank, and sintering a ceramic blank, so asto obtain a strontium lanthanum manganate/copper calcium titanate (LSMO-CCTO) composite magnetoelectric ceramic sample. The method has the beneficial effects that the raw materials are low in cost; components in the reaction process are controllable, and an impure phase is avoided; the gelling time is short; a preparation process is simple, and the dielectric property and magnetism of the ceramicsample have very strong regularity; a ceramic wafer is high in density and grain uniformity; and the process is simple and easy for industrial production, the prepared ceramic sample is high in density and grain uniformity and excellent in magnetoelectric performance.

The invention discloses soft-magnetic ferrite with high saturation magnetic induction. Raw materials of the soft-magnetic ferrite comprise first group of materials and second group of materials; the first group of materials comprise, in percent by substance amount, 52.0-53.5 mol% of ferric oxide, 38.0-42.0 mol% of manganese oxide, and 6.0-8.0 mol% of zinc oxide; by taking the total mass of the first group of materials as a reference, the second group of materials comprise 25-100 ppm of silicon oxide, 300-800 ppm of calcium oxide, 300-700 ppm of niobium oxide, 300-500 ppm of zirconium oxide, and 2500-3000 ppm of nickel oxide. The invention also discloses a preparation method of the above soft-magnetic ferrite with high saturation magnetic induction. The obtained soft-magnetic ferrite possesses high saturation magnetic induction, relatively high initial magnetic permeability and low magnetic core loss.