580 results about "SILICONE DIOXIDE" patented technology

This invention relates to the field of packaging film technology and provides a low-temperature polyolefin packaging film and its preparation method. The packaging film comprises a three-layer co-extruded structure consisting of an outer layer, a middle layer, and an inner layer. The components of each layer are as follows: Inner layer: metallocene polyolefin, high-performance polypropylene, modified lignin nanofibers, and erucamide / silica composite microspheres; Middle layer: PCR, modified nano-kaolinite, and trimethylolpropane triacrylate; Outer layer: PCR, modified tourmaline nanotubes, benzoyl peroxide microcapsules, and polydopamine-coated chitosan. This invention uses PCR, which is more energy-efficient and environmentally friendly. The addition of modified lignin nanofibers to the inner layer improves tensile strength; the addition of modified nano-kaolinite to the middle layer improves thermal shrinkage; the addition of modified tourmaline nanotubes to the outer layer lowers the crosslinking reaction initiation temperature and improves shrinkage; and the addition of polydopamine-coated chitosan allows for reversible recombination upon damage, improving puncture strength.

The present application provides a flip chip light emitting diode and a manufacturing method thereof. The flip chip light emitting diode comprises a transparent substrate, an epitaxial composite layer, a first conductive type electrode pad, a second conductive type electrode pad and a wafer bonding composite layer. The epitaxial composite layer is disposed on the transparent substrate. The first conductive type electrode pad is disposed on the transparent substrate and electrically connected to the epitaxial composite layer. The second conductive type electrode pad is disposed on the epitaxial composite layer and electrically connected to the epitaxial composite layer, and is located on the same horizontal plane as the first conductive type electrode pad on the same side of the transparent substrate. The wafer bonding composite layer comprises at least one titanium dioxide (TiO2) layer and at least one silicon dioxide (SiO2) layer, and is interposed between the epitaxial composite layer and the transparent substrate.

The present application relates to the technical field of copper clad laminates, and discloses a copper clad laminate, a resin composition for the copper clad laminate, and spherical silicon and a preparation method therefor. The spherical silicon of the present application is composed of spherical silicon dioxide and zinc molybdate particles dispersedly grown on the surface of the spherical silicon dioxide in situ and has a diameter of less than 10 microns and a D50 of 0.6-6 microns. The content of zinc molybdate per unit area on the surface of the spherical silicon dioxide is 0.03-1 g / m2, and the size of the zinc molybdate particles is less than or equal to 400 nm. The preparation method comprises: enabling spherical silicon dioxide to come into contact with / be mixed with a soluble molybdate and a zinc salt in an aqueous reaction system; and reacting the soluble molybdate with the zinc salt in situ on the surface of the spherical silicon dioxide, so as to form spherical silicon chemically coated with zinc molybdate particles. In the present application, by directly synthesizing the zinc molybdate in situ on the surface of the spherical silicon dioxide by means of a hydrothermal method, the structural morphology of the obtained spherical silicon and the size of the zinc molybdate particles can be effectively controlled, thereby ensuring that the wear of a drill bit during the drilling of the copper clad laminate is effectively mitigated.

A substantially carbon-free, molten electrolytic method and system for production of silicon with a purity of greater than approximately 95%. The process of the present disclosure is substantially carbon free (meaning little to no carbon dioxide (CO2) is released as a result of the process). The process utilizes an anode which evolves oxygen, not CO2. Silica may then be generated at the cathode, generating the desired product, silicon, as well as oxide (O2-) ions. In the process these O2- ions may react with a substantially inert anode to evolve oxygen (O2).

The utility model discloses a kind of silica-containing wastewater recycling system, including the first sedimentation tank, primary CTUF silicon removal pool, primary RO water treatment system, secondary RO water treatment system, second sedimentation tank, secondary CTUF silicon removal pool, tertiary RO water treatment system, MVR system connected in sequence;Primary RO water treatment system is equipped with brackish water film, secondary RO water treatment system is equipped with seawater desalination film, and STRO film is equipped in tertiary RO water treatment system;Primary CTUF silicon removal pool, secondary CTUF silicon removal pool are equipped with roll type ultrafiltration membrane in both;The MVR system is used to evaporate concentration to the concentrated water discharged by tertiary RO water treatment system, and primary RO water treatment system, secondary RO water treatment system, tertiary RO water treatment system, MVR system are also connected with recycling water tank.The utility model is treated to wastewater by multistage precipitation, CTUF silicon removal pool, RO system, effectively removes higher concentration of silicon in wastewater, realizes wastewater recycling.

A colored bilayer sub-ambient radiative cooling coating designed to enhance solar reflectance and aesthetic coloration is introduced. The coating includes a white bottom layer containing TiO2 or ZrO2 nanoparticles, and hollow glass spheres dispersed in a polymer matrix, and a colored top layer containing SiO2 microspheres and fluorescent pigments selected from Sr2Si5N8:Eu2+, Y3A15O12:Ce3+, (Ba,Sr)SiO4:Eu2+, or SrO·Al2O3:Eu phosphors dispersed in a polymer matrix. This bilayer structure achieves an effective solar reflectance of at least 90% and reduces surface temperature by at least 3° C. compared to ambient air, providing energy-efficient cooling with aesthetic appeal.

The present application relates to the technical field of pipeline drainage, and particularly relates to a composite hydrophobic material for inhibiting crystallization of a tunnel drainage pipeline and a preparation method thereof; the composite hydrophobic material comprises a hydrophobic inner layer and a scale inhibition outer layer attached to the outer surface of the hydrophobic inner layer; the hydrophobic inner layer comprises tetrahydrofuran, a solvent volatilizing agent, a surfactant, nano-silicon dioxide, a cross-linking agent and a curing agent; the scale inhibition outer layer comprises a scale inhibitor solution and a gum material, wherein the scale inhibitor solution comprises EDTA, hydrolyzed maleic anhydride and sulfamic acid; the preparation method comprises the following steps: S1, coating the hydrophobic inner layer material; S2, air-drying to obtain the hydrophobic inner layer; S3, coating the scale inhibition outer layer material on the surface of the hydrophobic inner layer to obtain the composite material; the composite material prepared by the present application still has excellent hydrophobic performance after being left for 24 hours and can be maintained for a long time; the scale inhibition outer layer protects the hydrophobic inner layer and simultaneously plays a scale inhibition role, thereby improving the functionality of the material.

The application discloses a mode spot converter integrated based on a gradient refractive index waveguide and a two-dimensional inverted taper waveguide, which comprises a silicon substrate, a gradient refractive index waveguide, a silicon dioxide substrate, a two-dimensional inverted taper waveguide and a cladding, the silicon dioxide substrate, the two-dimensional inverted taper waveguide and the cladding are sequentially arranged on one side of the silicon dioxide substrate, and the gradient refractive index waveguide is arranged on the other side of the silicon substrate and is attached to the two-dimensional inverted taper waveguide; the opposite faces of the gradient refractive index waveguide are respectively provided with a first input port and a first output port, the long axis of the two-dimensional inverted taper waveguide is provided with a second input port and a second output port at both ends, and the first output port is attached to the second input port; incident light is incident from the first input port, is output from the first output port after being condensed by the gradient refractive index waveguide, is then incident into the two-dimensional inverted taper waveguide through the second input port for adiabatic transmission, and is finally output from the second output port and coupled with an integrated silicon waveguide.

The present application relates to the technical field of energy storage equipment protection, and particularly relates to a phase change protective coating for an energy storage container and a preparation method thereof, which comprises, by total mass 100 parts, epoxy modified polyurethane 40-50 parts, lauric acid 10-15 parts, paraffin 5-8 parts, GPTMS modified boron nitride 3-6 parts, VTES modified nano-silicon dioxide 2-5 parts, leveling agent 0.5-0.7 parts, defoaming agent 0.3-0.5 parts, curing agent 7-9 parts, and diluent 10.8-17 parts; the GPTMS modified boron nitride is obtained by modifying 50 nm boron nitride with GPTMS and has a modification degree of 85%, and the VTES modified nano-silicon dioxide is obtained by modifying 30 nm nano-silicon dioxide with VTES and has a modification degree of 80%. The present application uses specific composite phase change materials and cooperates with a pretreatment process, so that the phase change components are uniformly dispersed, the problems of leakage and agglomeration are avoided, the stable phase change function of the coating is ensured, the environmental temperature fluctuation can be effectively smoothed, and stable operating temperature conditions are provided for the energy storage equipment.

This application provides a wide-temperature-range modified phosphate-based self-lubricating coating, its preparation method, and its application. The method includes: adding CrO3 solution to polyphosphoric acid at 90°C under stirring, adding Al(OH)3 in batches, continuing stirring for 2-3 hours, and cooling to room temperature to obtain a chromium-aluminum phosphate adhesive; heating the chromium-aluminum phosphate adhesive to 110-120°C, adding fumed silica, stirring, and then adding B2O3 in batches to obtain a modified chromium-aluminum phosphate adhesive; preparing the wide-temperature-range modified phosphate-based self-lubricating coating: mixing the modified chromium-aluminum phosphate adhesive with silica sol, mixing evenly, and then adding deionized water and filler to obtain a wide-temperature-range modified phosphate-based self-lubricating coating; spraying the wide-temperature-range modified phosphate-based self-lubricating coating onto the substrate surface and sintering to form a wide-temperature-range modified phosphate-based self-lubricating coating. The self-lubricating coating provided by this application can be applied to the field of wide-temperature-range self-lubrication and corrosion protection from room temperature to 800°C.

To provide a topcoat paint composition that can achieve both weather resistance, opacity, and appropriate flexibility in the formed coating film. [Solution] The topcoat paint composition comprises a main component and a curing agent, wherein the main component comprises at least a resin (A), a resin (B), a pigment, and a solvent, the resin (A) is an acrylic polyol resin having a hydroxyl value of 30 mgKOH / g or more and less than 100 mgKOH / g of resin solids, the resin (B) is an alkoxysilyl group-containing acrylic resin having a hydroxyl value of 0 mgKOH / g or more and less than 30 mgKOH / g of resin solids, and the silicon content in the resin solids is 5% by mass or more and 30% by mass or less in terms of SiO2, the curing agent comprises at least a polyisocyanate, the mass ratio of resin (A) to resin (B), (A):(B) is 80:20 to 20:80, and the pigment content is 5% by mass or more and 50% by mass or less, the topcoat paint composition.

The present solution provides a hybrid coagulant based on aluminum-iron silicate, where the molar concentration of silicon is in the range of 0.1 to 0.5 mol∙l-1, the molar ratio of the sum of aluminum and iron to silicon is in the range of 1:0.5 to 1:1.5, the molar ratio of aluminum to iron is in the range of 0.5:1 to 5:1, and a method of its preparation by mixing hydrated aluminum sulfate, hydrated iron sulfate and an acidic solution of silicon dioxide.

To provide a production method of silica capsule particles containing an oil solution, where the rate of inclusion of the oil solution is high.SOLUTION: Provided is a production method of silica capsule particles containing an oil solution, the silica capsule comprising a core containing an oil solution and a shell containing silica as a constituent. The production method comprises Step 1: a step of emulsifying an oil solution mixture containing a surfactant, water, an oil solution, and a silica precursor by an inline emulsifying disperser to obtain an emulsion and Step 2: a step of forming silica capsule particles containing the oil solution in a batch-type agitation tank using the emulsion obtained in Step 1.SELECTED DRAWING: None

The present invention relates to the technical field of the preparation of materials and aims to solve the problems of interface separation and relatively weak oxidation resistance under complex working conditions caused by insufficient interfacial bonding force of existing carbon / carbon composite materials. To this end, the present invention provides a carbon / carbon composite material and a preparation method therefor. The carbon / carbon composite material comprises, in mass percentages, 40-55% of polyacrylonitrile-based carbon fibers, 10-25% of pitch-based carbon fibers, 8-20% of nano silicon dioxide-grafted carbon fibers, 8-20% of bio-pitch, 8-15% of a nanographene-modified phenolic resin, 3-6% of silicon carbide whiskers, 2-4% of zirconium boride nanoparticles, 2-4% of graphitized carbon fibers, and 1-3% of a natural plant extract antioxidant. The carbon / carbon composite material of the present invention can provide stable interfacial bonding force and significant oxidation resistance, thereby ensuring the structural integrity and mechanical property stability of the material when subjected to a variety of complex stresses such as tension, compression, bending, and shear, and broadening the application range of the material in the field of high-temperature oxidation resistance.

The application relates to the technical field of surface acoustic wave devices, in particular to a structure and method for suppressing bulk acoustic wave interference in a multilayer SAW resonator, which comprises a support substrate, a bonding layer, a piezoelectric layer and an interdigital transducer, a reflective grating and an RF signal pad arranged in sequence from bottom to top; wherein an acoustic impedance matching and attenuating layer is arranged between the RF signal pad and the piezoelectric layer, and the acoustic impedance matching and attenuating layer is a single dielectric layer or a periodic multilayer film alternately stacked by two or more dielectric materials with different acoustic characteristics, and the material of the single dielectric layer is silicon dioxide or doped silicon dioxide. The application sets the acoustic impedance matching and attenuating layer between the RF signal pad and the piezoelectric layer, so as to effectively absorb and scatter the bulk acoustic wave energy generated below the pad, convert the bulk acoustic wave energy into heat energy, significantly weaken the bulk acoustic wave intensity, and improve the overall performance and consistency of the SAW device in high-frequency communication applications.

This invention discloses a lightweight sound-absorbing building material, its preparation method, and its application in ceiling components, relating to the field of lightweight building materials technology. The lightweight sound-absorbing building material of this invention consists of a porous plate and a glaze layer on the surface of the porous plate. The glaze layer is formed by spraying glaze onto the surface of the porous plate; the porous plate is formed by sintering a plate-forming composition; the plate-forming composition includes the following raw materials: waste foamed ceramic powder, diatomaceous earth, hollow glass microspheres, cellulose nanocrystals, bilayer fibers, a foaming agent, and an ethanol solution of polyethyleneimine. The core-shell structure bilayer fibers introduced in this invention, with a mesoporous barium titanate-silica composite phase as the core and an MXene-graphene composite phase as the shell, effectively improve the material's sound absorption and noise reduction capabilities; the introduction of hollow glass microspheres and cellulose nanocrystals further enhances the material's lightweight properties, flexural strength, and sound absorption and noise reduction capabilities. Therefore, this invention has broader application prospects.

When etching a silicon oxide film formed on a substrate, the shape of the silicon oxide film after etching is to be as desired. [Solution] The etching method of the present disclosure includes an etching step of etching a silicon oxide film formed on a substrate on which a silicon oxide film is formed on the surface by supplying a halogen-containing gas, ammonia gas, and an amine gas as etching gases.

This invention discloses a method for fabricating a high-efficiency Micro-OLED structure, belonging to the field of OLED display technology. Addressing the problems of insufficient brightness, severe large-angle scattering light loss, and bottlenecks in improving light extraction efficiency in existing silicon-based Micro-OLEDs, this invention fabricates a silicon dioxide / silicon nitride bilayer dielectric layer on a CMOS substrate. Utilizing the difference in etching rates between the two layers, a parabolic reflective bowl anode is fabricated. The pixel definition layer, organic light-emitting layer, thin-film encapsulation layer, color filter layer, and planarization layer are then fabricated sequentially. Finally, a microlens array coaxial with the reflective bowl is fabricated, forming a synergistic light-gathering system. This invention can significantly reduce internal light loss in the device, significantly improve peak brightness and light extraction efficiency, is compatible with existing mass production processes, and meets the high-brightness application requirements of AR / VR near-eye displays.

This application provides a quantum optical microcavity device modified with fluorinated organophosphonic acid and its fabrication method, relating to the fields of organic chemistry and optical engineering. The quantum optical microcavity device includes a microcavity body and a fluorinated organophosphonic acid monolayer attached to the surface of the microcavity body. A hydrophobic fluorinated organophosphonic acid monolayer is formed on the surface of the microcavity body through a chemical reaction between a mixed solution containing fluorinated organophosphonic acid molecules and the surface of the microcavity body. Since the active head groups of the fluorinated organophosphonic acid can form chemical bonds with –OH and Si–O–Si on the surface of silica through reaction, the adsorption of water molecules from the air onto the –OH and Si–O–Si on the surface of the silica microcavity body can be effectively suppressed, thus improving the Q-value stability of the whispering-gallery mode quantum optical microcavity device.

This invention relates to the field of coal washing and beneficiation technology, and discloses a method for preparing a nano-flotation reagent for coarse coal slime. The method involves mixing sulfonated fatty acid methyl ester with kerosene and n-octanol to form an oil phase, then further mixing this with an aqueous phase containing a nonionic emulsifier, and adding functionalized nano-silica to obtain a mixed solution. This mixed solution is then sequentially treated by ultrasonic dispersion, high-speed stirring, and micro-electrolysis to generate nano / microbubbles in situ and maintain their uniform distribution, resulting in a nano-microemulsion. This invention can significantly improve the adhesion efficiency and loading capacity of coarse coal surfaces, effectively suppress tailings runoff, and improve the transportation and collection efficiency of coarse coal. It solves the problems of low clean coal yield and tailings runoff caused by the low adsorption efficiency and poor foam stability of traditional flotation reagents for coarse coal.

Silicon dioxide can be deposited onto a substrate by plasma enhanced chemical vapour deposition (PECVD). The substrate includes at least one silicon dioxide layer deposited thereon. A plasma enhanced chemical vapour deposition apparatus can be used to deposit silicon dioxide onto a substrate by plasma enhanced chemical vapour deposition.

A high-temperature resistant lightweight composite material, its preparation method, and its applications are disclosed, relating to the field of composite material technology. This invention solves the problems of existing materials where it is difficult to simultaneously achieve high temperature resistance and lightweight, low structural efficiency due to the separation of heat protection and load-bearing design, insufficient temperature resistance and toughness of the sandwich layer, and difficulties and high costs associated with large-size molding. The material comprises an integrated co-cured outer heat-resistant layer, an intermediate transition layer, and an inner load-bearing layer. The outer heat-resistant layer uses a modified epoxy / cyanate copolymer resin as the matrix and a high-silica glass fiber and carbon fiber blended fabric as reinforcement, with fumed silica and carbon nanotube fillers incorporated into the matrix resin. The intermediate transition layer is polymethacrylamide foam. The inner load-bearing layer uses an epoxy-modified cyanate ester resin as the matrix and a carbon fiber biaxial plain weave fabric as reinforcement. This invention can be used in rocket fairings, hypersonic vehicle skins, spacecraft reentry capsule thermal protection structures, hypersonic missile shells, aircraft engine nacelles, or high-speed train front fairings.

This invention belongs to the field of inorganic non-metallic materials technology, and specifically relates to a low-carbon, high-iron sulfoaluminate cementitious material based on steel slag solid waste. It comprises the following raw materials in parts by weight: limestone 35-55 parts, anhydrite 10-20 parts, bauxite 20-45 parts, modified steel slag A 8-15 parts, and modified steel slag B 5-10 parts. Modified steel slag A is activated by acid / alkali, doped with calcium fluoride / sodium sulfate / titanium dioxide and calcined, and then in-situ co-precipitated to introduce magnesium aluminum spinel nanocrystals. This is used for raw material calcination, which can reduce the calcination temperature, refine the clinker grains, and improve early strength. Modified steel slag B is activated by acid / alkali, doped and calcined, and coated with silane coupling agent / polyvinyl alcohol / silica ball milling. It is incorporated as a blending material to improve the interface, slow-release hydration, and improve later-stage strength. This invention achieves high-value utilization of steel slag through synergistic modification, and the cementitious material has advantages such as low carbon content, early and high strength, suitable setting time, and excellent stability.

This invention relates to an electromagnetic shielding polyester powder coating containing carbon-iron composite conductive filler and its preparation method, belonging to the field of electromagnetic shielding composite material technology. The method includes the following steps: S1, dispersing purified iron(III) oxide nanoparticles ultrasonically in a mixed solvent of ethanol, deionized water, and ammonia to obtain an iron(III) oxide / silica composite material; S2, dissolving carboxylated multi-walled carbon nanotubes in a silane coupling agent, rinsing and drying to obtain a modified carbon-iron composite material; S3, mixing polyester resin, the modified carbon-iron composite material obtained in S2, precipitated barium sulfate, curing agent, leveling agent, benzoin, and carbon black raw materials according to a specified ratio, and finally completing the curing process. This electromagnetic shielding polyester powder coating containing carbon-iron composite conductive filler, by introducing the modified carbon-iron composite conductive filler, achieves an electromagnetic shielding effectiveness of over 30 dB in the X-band, effectively blocking electromagnetic radiation and meeting the shielding requirements of electronic equipment and communication systems.

The application discloses a high-elongation-strength anti-fatigue TPU blended material and a preparation method thereof, and relates to the field of polymer materials. In the preparation of the high-elongation-strength anti-fatigue TPU blended material, phosphorus chloride is reacted with 4'-vinyl-[1,1'-biphenyl]-4-alcohol and p-phenylphenol to obtain a phosphite antioxidant; nano-silicon dioxide is sequentially reacted with trimethoxysilane and the phosphite antioxidant to obtain modified silicon dioxide; a modified polyurethane elastomer is prepared by reacting hydroxyl-terminated polysiloxane, 1,4-butanediol, isophorone diisocyanate and adipic dihydrazide; polyether amide elastomer and the modified polyurethane elastomer are mixed, mixed with a compatilizer, modified silicon dioxide and antioxidant 1010, dried, mechanically mixed, and melt-blended to obtain the high-elongation-strength anti-fatigue TPU blended material. The high-elongation-strength anti-fatigue TPU blended material prepared by the application has the abilities of self-repairing, durability and flame resistance.

This invention discloses a durable, hydrophobic, and flame-retardant wood coating and its preparation method, belonging to the field of timber structure building protection. The wood coating of this invention is a two-layer system, comprising a flame-retardant primer and a hydrophobic topcoat. The flame-retardant primer uses tung oil modified from natural rubber via the Diels-Alder reaction as the film-forming matrix and biochar prepared from agricultural waste straw as a bio-based flame-retardant filler. The hydrophobic topcoat uses polydimethylsiloxane / nano-silica as the core functional component. This invention uses fully bio-based raw materials as its core, and the preparation process is simple and green. Through molecular structure modification and synergistic design of the two-layer system, the coating simultaneously possesses excellent hydrophobicity, flame retardancy and smoke suppression, UV stability, and long-term outdoor durability. After being applied to the wood surface, it can simultaneously solve the core pain points of wood's flammability, moisture absorption, and poor weather resistance, showing broad application prospects in the fields of modern timber structure buildings and the protection of traditional timber architectural heritage.