13 results about "Tio2 particle" patented technology

This invention relates to the field of nickel electrode paste preparation technology, and discloses an ultrafine roller-printed nickel paste for ultra-high capacitance MLCCs and its preparation method. The nickel paste includes nickel powder, Ni3Sn-coated nickel powder, diffusion barrier phase, resin, solvent, dispersant, and rheology modifier. The Ni3Sn-coated nickel powder is obtained by chemical plating, where Sn is bonded to Ni in the form of an intermetallic compound. The diffusion barrier phase is selected from nano-ZrO2 or TiO2 particles. After pre-dispersing each solid component with a portion of the dispersant and solvent, the mixture is ground and dispersed using a gradient grinding process, then mixed with an organic carrier to form a paste. After vacuum degassing and filtration, the nickel paste is obtained. This invention uses Ni3Sn-coated nickel powder to replace elemental Sn powder, inhibiting the formation of a dense SnO2 passivation layer. Combined with the blocking effect of the diffusion barrier phase at the grain boundaries and the protection of the coating layer integrity by the gradient grinding process, this invention solves the problem of long-term reliability degradation of MLCCs caused by Sn storage.

The purpose of the present invention is to obtain low-order titanium oxide particles having a novel crystal composition.　The present invention involves a method for producing particles, said method comprising a step for heating a mixture containing TiH2 and TiO2 at a temperature of 700-950°C, wherein the molar ratio of TiO2 to TiH2 contained in the mixture is 5.0-6.8.

This invention discloses a PVDF-TiO2 micro / nano bidirectional selective separation coating membrane, its preparation method, and its applications, belonging to the field of solid material surface modification technology. By controlling the curing time of the PVDF coating, TiO2 nanoparticles are sprayed onto the coating in a semi-dry state. Utilizing the viscosity differences of PVDF at different curing degrees, the TiO2 particles are partially embedded in the PVDF matrix and partially exposed on the surface, forming a unique semi-embedded and semi-exposed structure. By precisely adjusting the curing time and optimizing the embedding depth of TiO2, a coating membrane with superhydrophilic / superoleophilic properties in air, superoleophobic properties underwater, and superhydrophobic properties underwater is obtained. This membrane, through pre-wetting to induce surface state transition, can achieve bidirectional selective separation of oil-in-water and water-in-oil emulsions, as well as the separation of immiscible oil-water mixtures, and exhibits excellent recyclability, corrosion resistance, and mechanical stability.

The application relates to the field of degradable plastics, and discloses a degradable polyethylene composition and a preparation method thereof, the degradable polyethylene composition being made by melt mixing modified polyethylene resin and modified starch particles; the modified polyethylene resin being made by melt mixing low-density polyethylene, ZnO-TiO2 particles and oxidized polyethylene wax; the modified starch particles being made by melt mixing glycerol, corn starch and modified montmorillonite; the ZnO-TiO2 particles being prepared by preparing TiO2 particles by a sol-gel method and being made by an in-situ growth method; and the modified montmorillonite being made by using 2-bromoethylamine hydrobromide, dichlorophenyl phosphate, 4-bromo-triphenylamine and dodecyl dimethyl tertiary amine as raw materials to prepare triphenylamine quaternary ammonium salt intercalated montmorillonite, the modified starch particles and the modified polyethylene resin are compounded to prepare a photo-biological degradable composition, and the photo-biological degradable composition has good mechanical properties, antibacterial effect and flame-retardant performance.

This invention relates to a sandwich composite structure filter membrane substrate surface-enhanced Raman scattering (SERS) chip, its preparation method, and its applications. The chip uses a microporous filter membrane as a flexible substrate, and from bottom to top, it comprises a photocatalytic support layer composed of flower-like TiO2 particles, an intermediate functional layer composed of few-layer porous g-C3N4, and a surface-enhancing layer composed of gold nanostars. The TiO2 and g-C3N4 form a tight interface structure, and the gold nanostars are loaded on the g-C3N4 surface. The chip is assembled layer by layer using a combination of vacuum filtration and spin coating. This composite structure combines molecular adsorption, surface-enhanced Raman detection, and photocatalytic degradation functions, enabling the removal of residual molecules on the substrate surface and restoration of SERS active sites after detection, thereby improving the substrate's reusability. The preparation method of this invention is simple and low-cost, making it suitable for fields such as environmental monitoring.

The utility model provides a kind of preparation device of nanometer titanium oxide particle sol, the preparation process of titanium oxide particle sol is controlled using full membrane method process, specific content includes: dynamic microporous ceramic membrane feed, dynamic rotation+microporous penetration, realize the high homogenization of reaction system;Dynamic ceramic membrane separates, concentrates and washes intermediate product, and the intermediate product is purified;Dynamic microporous ceramic reactor carries out on-line particle classification to reaction product, realizes the homogenization of product particle;Efficient separation alcohol and water by pervaporation membrane, realize the reuse of alcohol.The reactant is added in the device using membrane reactor D1 (dynamic rotating membrane reactor), so that the reactant is more evenly dispersed in the system, and the product particle size distribution is too wide due to local concentration being too high or too low is inhibited.

A method of manufacturing titanium dioxide (TiO2) pigment particles with an organic oil coating includes heating a mixer containing a charge of TiO2 pigment particles to an elevated temperature sufficient to lower the viscosity of the organic oil to close to the viscosity of water Organic oil is injected into the heated mixer through two-phase atomizer nozzle(s) while mixing the TiO2 pigment particles with the agitator. While mixing with the agitator, the heated TiO2 pigment particles and the injected organic oil are simultaneously chopped with the chopper to break up agglomerates formed by the mixture of the organic oil and the TiO2 particles. The mixer may then be cooled to a preselected temperature at which agglomeration of coated pigment particles substantially ceases while continuing to mix and chop the homogeneous mixture. The chopper is stopped when the mixer reaches the preselected temperature.

This invention discloses a method for preparing a titanium dioxide catalyst and its application in catalytic polyester synthesis, belonging to the field of polyester synthesis technology. This invention uses TiCl4 as the titanium source and tartaric acid as the complexing agent to form a homogeneous solution at 5-30℃, avoiding the use of strong acids / bases in traditional hydrolysis methods. The dispersion of TiO2 particles is controlled by an ethanol / cyclohexane mixed solvent, and reflux reaction promotes uniform nucleation. Finally, calcination is performed at 350-450℃ under nitrogen protection to carbonize the tartaric acid, forming a porous structure, while simultaneously inhibiting the transition of the crystal form to the rutile phase and retaining highly active crystal faces. The obtained titanium dioxide catalyst has a particle size of 20-200 nm and a specific surface area of ​​50-200 m². 2 This catalyst, at / g, exhibits high activity and selectivity when used to catalyze the synthesis of polyesters such as PET, PBT, PTT, and PBS. Furthermore, its preparation method is simple, low-cost, and environmentally friendly, making it suitable for industrial production.

The utility model discloses a dustproof antireflection coating structure of solar photovoltaic glass, it includes base layer, nanometer level micropore array layer, hydrophobic protective layer and transition adhesive layer. Micropore array layer is formed regular hexagon micropore through laser etching, and the aperture is 100-300 nanometers, and the depth is 200-500 nanometers, to enhance the light transmittance, hydrophobic protective layer is made of fluorinated siloxane material, and is equipped with the convex structure on the surface, and the height is 50-100 nanometers, and improves waterproofness and self -cleaning ability, and transition adhesive layer inlays titanium oxide particle, and absorbs ultraviolet and improves weather resistance. The application improves the light transmittance through optimizing micropore geometry shape and distribution density, and realizes excellent dustproof effect by using the hydrophobic layer, prolongs the service life, reduces the maintenance cost, is applicable to photovoltaic module manufacturing field, and provides the guarantee for the long -term stable operation of photovoltaic system.

The present invention provides barium titanium dioxide particles with a high sintering delay effect and a method for manufacturing the same. The barium titanium dioxide particles of the perovskite structure according to the present invention have an atomic ratio of Ba to Ti, Ba / Ti, of 0.95 to 1.05, and a crystallite diameter of 5 to 25 nm.

This invention provides an electrophotographic photosensitive material capable of suppressing image defects caused by fogging in an image forming apparatus using a non-magnetic, single-component, pulverized toner. The electrophotographic photosensitive material of this invention is used in an image forming apparatus using a non-magnetic, single-component, pulverized toner. The electrophotographic photosensitive material has a substrate disposed on a conductive substrate and a photosensitive layer on which a charge generation layer and a charge transport layer are sequentially stacked. The substrate comprises a thermosetting resin and titanium dioxide particles, wherein the thermosetting resin comprises an alkyd resin and a melamine resin. The charge transport layer comprises a binder resin and a hole transporter, wherein the binder resin comprises a polycarbonate resin or a polyaryl ester resin, and the hole transporter comprises a compound represented by general formula (1).

This invention relates to the field of nickel electrode paste preparation technology, and discloses an ultrafine roller-printed nickel paste for ultra-high capacitance MLCCs and its preparation method. The nickel paste includes nickel powder, Ni3Sn-coated nickel powder, diffusion barrier phase, resin, solvent, dispersant, and rheology modifier. The Ni3Sn-coated nickel powder is obtained by chemical plating, where Sn is bonded to Ni in the form of an intermetallic compound. The diffusion barrier phase is selected from nano-ZrO2 or TiO2 particles. After pre-dispersing each solid component with a portion of the dispersant and solvent, the mixture is ground and dispersed using a gradient grinding process, then mixed with an organic carrier to form a paste. After vacuum degassing and filtration, the nickel paste is obtained. This invention uses Ni3Sn-coated nickel powder to replace elemental Sn powder, inhibiting the formation of a dense SnO2 passivation layer. Combined with the blocking effect of the diffusion barrier phase at the grain boundaries and the protection of the coating layer integrity by the gradient grinding process, this invention solves the problem of long-term reliability degradation of MLCCs caused by Sn storage.

The invention relates to a titanium dioxide-based catalyst and a preparation method thereof, belongs to the technical field of catalyst resource utilization, and solves the problems of low resource utilization rate and high production cost caused by the fact that recycled titanium dioxide cannot be used as a raw material to prepare the titanium dioxide-based catalyst in the prior art. The preparation method comprises the following steps: a, preparing an ammonium metavanadate solution; b, adding the ammonium metavanadate solution into the titanium dioxide powder, stirring, drying, roasting and grinding to obtain V2O5-TiO2 particles; c, preparing an ammonium metatungstate aqueous solution; step d, adding an ammonium metatungstate aqueous solution into the V2O5-TiO2 particles, stirring, drying, roasting and grinding to obtain V2O5 / WO3-TiO2; in the step b, the titanium dioxide powder is recovered from the industrial inactivated denitration catalyst.