34results about How to "Preparation to meet" patented technology

The invention relates to a highly compact ceramic ball of silicon carbide and a preparation process thereof. The ceramic ball is prepared through carrying out steps of batch mixing, spray granulation, seed production, balling, and sintering on the following raw materials: 85-95% of a main material fine silicon carbide powder, 4-10% of a high char yield phenolic resin, 1-5% of a sintering aid, 1-10% of the weight percentage of the main material of a binder, and 0.5-3% of the weight percentage of the main material of a dispersant, wherein the binder is at least one of polyvinyl alcohol, dextrin, and carboxymethyl cellulose, and the dispersant is at least one of polyethylene glycolm, tetramethylammonium hydroxide, an aluminophosphate, and polyacrylic acid. According to the invention, active beneficial effects comprise that: 1, the ceramic ball of silicon carbide has the advantages of high density and stable chemical property; 2, the preparation process of the invention allows preparationof ceramic balls of silicon carbide with particle sizes of various specifications to be satisfied, so the ceramic balls with the particle size having a wide range of 1-50mm to be produced; and 3, theprocess is simple, one-time investment is less, and production expansion is easy.

The invention provides a material for an RFID (Radio Frequency Identification) antenna conductive pattern. The material for the RFID antenna conductive pattern has the following specific characteristics that the material is metal nano-particles which are of core-shell structures, wherein the inner cores are Cu particles of about 50 nm, and an Ag layer coats the surfaces of Cu through a composite method of displacement and chemical deposition; Cu@Ag nano-particles, absolute ethyl alcohol and deionized water are mixed to prepare conductive printing ink with the solid content of about 70 percent;the material is obtained through metal stencil printing and sintering. Antenna patterns with different thicknesses can be manufactured by the material by adopting metal stencil printing so as to meetdifferent impedance requirements of antennae of various frequency bands. The Cu@Ag nano-particles have the characteristics of low impedance, high conductivity, controllable Ag layer thickness and thelike; compared with Cu conductive printing ink, the Cu@Ag nano-particles have high oxidation resistance; compared with pure Ag or Au conductive printing ink, the cost is greatly reduced; optimal sintering performance can be realized by controlling the thickness of the Ag layer; moreover, a preparation process of the material is simple and convenient; a printing ink solvent is environment-friendlyand renewable, and has a very great application prospect in the field of conductive printing ink for the RFID antenna.

The present invention discloses a preparation method for new type ceramics-based buoyancy material with light weight and high intensity, wherein the polishing waste sludge from the ceramics factory serves as the main material, the porous ceramic material which has high sealed porosity content and prepared by dry pressing, injection moulding, atmospheric pressure sintering, high temperature chemical blowing process serves as the matrix of the new type ceramics-based buoyancy material, and epoxy resin serves as the fortified outer wall. Compared with the prior art, the buoyancy material of the present invention has excellent endurance and weathering resistance, sea-water corrosion resistance, aging resistance, small specific absorption of volume, high mechanical strength, simple preparation process, low cost and convenience for industrialisation. The internal pore of the porous ceramics has an uniform distribution and the sealed porosity is more than 95% due to the high temperature foaming in situ. The new type buoyancy material has low density and high compression strength. The porous ceramic material prepared by sintering at 1180 DEG C has a density of 0.35g/cm<3> and a compression strength of more than 7 MPa. The buoyancy material which is modified by epoxy resin has a density of 0.52g/cm<3> and a compression strength of more than 20 MPa.

The invention discloses a matt-white immersion-gold-resistant, anti-cracking and light-sensing solder mask material and a preparation method thereof. The matt-white immersion-gold-resistant, anti-cracking and light-sensing solder mask material mainly comprises a main agent and a curing agent, wherein the main agent comprises acrylic resin with a special function, acrylic resin, a photoinitiator, a dispersing agent, dibasic ester, fumed silica, barium sulfate, titanium dioxide and an antifoaming agent; the curing agent comprises thermocuring resin, a curing additive, melamine, a photocuring monomer, triglycidyl isocyanurate, titanium dioxide and dibasic ester. The prepared matt-white light-sensing solder mask material has high immersion gold resistance and yellowing resistance, and is more stable and reliable during normal technology use of a PCB (printed circuit board).

The invention discloses a molding preparation method for a tackified preform of a fiber layered-connection structure. According to the molding preparation method for the tackified preform of the fiber layered-connection structure, the tackified perform is woven according to a mold through a knitting method. The molding preparation method for the tackified preform of the fiber layered-connection structure is applicable to preparation of the tackified perform which is high in thickness, large in size and complex in shape; the molding preparation method ahs the advantages of being great in structural design performance, good in tackified perform homogeneity, excellent in mechanical property, high in fiber volume fraction, complete in block construction, continuous in yarn bundle, stable and controllable in dimension, high in preparation precision and suitable for preparing tackified perform complex in shape.

The invention provides a silicon carbide ceramic ball. The silicon carbide ceramic ball is prepared by mixing, granulating, seeding, forming, sintering and grinding, production of seeds, forming, sintering and grinding from, by weight parts, a main ingredient and an auxiliary, wherein the main ingredient includes 87%-96% of silicon carbide fine powder, 5%-11% of high residual carbon phenolic resinand 1.2%-5% of sintering aid, wherein the sintering aid is at least one of B, C, B4C, Al2O3 and Y2O3. The auxiliary includes binder accounting for 0.9%-11% of the weight of the main ingredient and dispersing agent accounting for 0.5%-3.5% the weight of the main ingredient, and the binder is at least one of polyvinyl alcohol, dextrin and carboxymethyl cellulose; and the dispersing agent is at least one of polyethylene glycol, tetramethylammonium hydroxide, aluminophosphate, and polyacrylic acid. The silicon carbide ceramic ball has high density and stable chemical property; the silicon carbideceramic ball can meet the preparation of silicon carbide ceramic balls of multiple specifications, the range is wide, and the silicon carbide ceramic balls ranging from 1 mm to 50 mm can be produced.The one-time investment is small, and the production expansion is easy.

The invention discloses an aerated concrete block preparation system which comprises a support, a mold mechanism and a lifting mechanism, wherein the mold mechanism comprises a mold frame, a driving unit, connecting rings, connecting rods, sliding rods and mold side plates; the connecting rings are positioned on the mold frame and can rotate; the driving unit drives the connecting ring to rotate; the multiple mold side plates are arranged in the connecting ring and are sequentially arranged in the circumferential direction of the connecting ring to define a mold cavity, and the adjacent mold side plates are in sliding connection; and the sliding rods are located between the connecting rings and the mold side plates and are in sliding connection with the mold frame in the radial direction of the connecting rings, one end of each sliding rod is in sliding connection with the corresponding mold side plate in the horizontal direction, the other end of each sliding rod is rotationally connected with one end of the corresponding connecting rod, and the other end of each connecting rod is rotationally connected with the corresponding connecting ring. According to the aerated concrete block preparation system, preparation of aerated concrete blocks of different sizes can be met, rapid demolding can be achieved, and the preparation efficiency and quality of the aerated concrete blocks are improved.

The invention provides a preparation method of a graphene transparent conductive film with a superfine conductive pattern. The preparation method comprises the following steps of S1, preparing a planar glass substrate, S2, preparing a parylene (parylene) film on the surface of the planar glass substrate to serve as a release layer of the conductive film, S3, preparing a layer of polyimide (PI) film on the surface of the parylene film, S4, preparing graphene on the surface of the transparent insulating film and forming a graphene fine pattern by adopting a laser-induced graphene (LIG) technology of a short-wavelength laser light source, and S5, stripping the polyimide transparent insulating film from the surface of the planar glass to obtain the superfine flexible graphene transparent conductive film.

The invention discloses a method for separating and preparing a caftaric acid standard product in a vitis davidii juice by using high-speed countercurrent chromatography. The method comprises the following steps: enriching the vitis davidii juice by using macroporous adsorption resin, eluting the material with ethanol, performing freeze-drying to obtain a crude sample, and performing high-speed countercurrent separation on the crude sample through solvent system water. The invention establishes the method for separating a polyphenol monomer in the vitis davidii juice by the high-speed countercurrent chromatography, and the method identifies the seperated monomer as caftaric acid by the methods such as HPLC-MS and nuclear magnetic resonance. The caftaric acid has an important pharmacological function, and its standard product is expensive, and the caftaric acid prepared by the method of the present invention has a purity of 95.8% and a calculated yield of 61.99 mg/L. The method of the high-purity standard product prepared can satisfy the large-scale preparation of caftaric acid of vitis davidii.

The invention provides a blood capillary network and a making method thereof. A soluble three-dimensional spinning network is made by adopting a centrifugal spinning method, animal cells are cultured on the soluble three-dimensional spinning network and grow and proliferate along the soluble three-dimensional spinning network, and the blood capillary network is obtained after the soluble three-dimensional spinning network is completely dissolved. A high-voltage electrostatic field and a large number of molds are not needed, a centrifugal force is only utilized as the power for producing the soluble three-dimensional spinning network, the production yield is greatly improved, the energy consumption cost is greatly reduced, the safety of production operation is improved, the demand for large-scale production of the three-dimensional spinning network of engineering-oriented tissues is met, and the important clinical obstacle of tissue engineering structures are also overcome. The blood capillary network is low in preparation cost, and required three-dimensional blood capillary networks can be provided for establishment of full and effective blood capillary network systems of thick engineering-oriented tissues or organs such as the liver and kidney.

The invention provides a preparation method for industrial high-temperature hot water. A hot water exchange circulation system, an air exchange heating circulation system and a high-temperature water heating pool for cleaning workpieces together achieve circulatory heating of high-temperature hot water, so that preparation of high-temperature hot water used for cleaning machine components in the machine manufacturing industry, the bearing manufacturing industry and other processing procedures is realized to solve the irresolvable technical problems existing in conventional steam boiler heating and electrical heating, energy saving and environmental protection are achieved, the manufacturing cost is lowered and the production quality and the environmental quality are improved.

The invention provides a high-strength high-plasticity heat-resistant magnesium alloy component and a preparation method thereof, the high-strength high-plasticity heat-resistant magnesium alloy component comprises the following components: 5.0-9.0% of Gd, 2.0-6.0% of Y, 0.1-0.5% of Zn, 0.3-1.0% of Zr, and the balance of Mg and inevitable impurities, and the sum of the mass percent of rare earth elements Gd and Y in the component composition is 8-12%; the preparation method comprises the steps of alloy smelting, homogenization treatment, strong plastic deformation, hot forming and warm deformation, specifically, an obtained formed part is heated at the temperature of 200-250 DEG C, heat preservation is conducted for 2 h, then the formed part is put into a mold preheated at the temperature of 200 DEG C, the deformation amount is controlled to be 3-10%, and heat treatment is conducted. The prepared magnesium alloy component is fine in grain, the tensile strength at the room temperature is larger than or equal to 428 MPa, the percentage elongation after fracture is larger than or equal to 12%, the tensile strength at the temperature of 200 DEG C is larger than or equal to 358 MPa, the percentage elongation after fracture is larger than or equal to 13%, the magnesium alloy component can widely replace 2A12 and other medium-strength aluminum alloys, and the application range of the magnesium alloy can be further expanded.