78results about How to "Reduce polarizability" patented technology

A nonvolatile magnetic memory device having a magnetoresistance-effect element includes: (A) a laminated structure having a recording layer in which an axis of easy magnetization is oriented in a perpendicular direction; (B) a first wiring line electrically connected to a lower part of the laminated structure; and (C) a second wiring line electrically connected to an upper part of the laminated structure, wherein a high Young's modulus region having a Young's modulus of a higher value than that of a Young's modulus of a material forming the recording layer is provided close to a side surface of the laminated structure.

The invention provides a reinforced greasy-dirt-resistant high-gloss polypropylene composite material and a preparation method thereof. The reinforced greasy-dirt-resistant high-gloss polypropylene composite material is prepared form the following components in parts by weight: 60-80 parts of PP resin, 10-15 parts of superfine precipitated barium sulfate, 6-10 parts of reinforced magnesium sulfate whiskers, 2-5 parts of fluoride, 0.2-0.4 part of an antioxidant, 0.1-0.3 part of a nucleating agent, 0.5-1 part of a lubricating agent and 0-3 parts of other auxiliaries. According to the reinforced greasy-dirt-resistant high-gloss polypropylene composite material prepared by the method disclosed by the invention, the surface polarity of the material is changed and the greasy dirt resistance of the material is improved; meanwhile, the composite material meets the European Union Regulation (EC) No.1935 / 2004 of related food contact materials, and has the characteristics of being high in gloss, low in after shrinkage, high in rigidity, and the like. The material is applied to a housing of a kitchen appliance, so that the surface of the kitchen appliance has capacity of resisting greasy dirt and self-cleaning capacity, and the self-cleaning anti-greasy-dirt environmental requirements of modern kitchen appliance are met.

The invention discloses a water-based fluorine-containing polyurethane paint and a preparation method thereof. The water-based fluorine-containing polyurethane paint comprises the following raw materials in parts by weight: 5-8 parts of BayhydurXP2655, 60-70 parts of water-based hydroxy fluorine-containing polyurethane resin, 0.05-0.1 part of leveling agent, 1-10 parts of wetting agent, 1-3 parts of thickening agent, 0.2-1 part of defoaming agent, 2-5 parts of film-forming assistant, 0.02-1.0 part of catalyst A and 20-40 parts of deionized water. After being coated, the water-based fluorine-containing polyurethane paint has high film coating hardness, high gloss and high water contact angle, so that the water-based fluorine-containing polyurethane paint can be used in the traditional application fields of the conventional solvent polyurethane paint, such as the high-performance technical fields of automobiles, woodware, industrial maintenance, plastics, wind-driven generator vanes, solar cells and the like.

The invention relates to an anti-water-blocking agent for drilling fluid and a preparation method thereof. The anti-water-blocking agent is a polymer containing a butyl acrylate (BA) monomer, a methyl methacrylate (MMA) monomer, a methacrylic acid (MAA) monomer, an acrylamide (AM) monomer and a 2-(perfluorohexyl)ethyl methacrylate (G06B) monomer, wherein the mol percent of a is 35.8-36.5%, the mol percent of b is 27.0-30.5%, the mol percent of c is 7.5-9.0% and the mol percent of d is 7.5-9.0%. According to the invention, the anti-water-blocking agent effectively reduces filtrate surface tension and oil-water interfacial tension, improves gas-phase relative permeability, has a good invading fluid draining effect and is beneficial to driving away resident fluid in near wellbore formations in a draining manner so as to better relieve the water blocking effect. The preparation method of the anti-water-blocking agent is safe and economic and has a high conversion rate; and a batch feeding method is used, so that the requirements for low dosage and high performance are met.

The invention discloses a high-catalytic-activity amorphous metal oxide hydrogen evolution electrode and a preparation method thereof. The electrode comprises an active coating made from an amorphous metal oxide, which is selected from any one or more of amorphous nickel oxide, amorphous ruthenium oxide, amorphous molybdenum oxide, amorphous cerium oxide, and amorphous strontium oxide. The preparation method comprises: step1, pre-treating a nickel screen to form a porous transition nickel oxide layer; step2, preparing an active coating precursor solution and coating the nickel screen with the precursor solution; and step3, performing thermal decomposition and laser-cladding assisted solidification to obtain the hydrogen evolution electrode. The preparation method is simple and is low in thermal decomposition temperature. The prepared hydrogen evolution electrode is high in catalytic activity and is not prone to polarize in a high current density. A catalyst firmly combines with a matrix and is not prone to fall off. The hydrogen evolution electrode has excellent anti-reverse-current performance. Compared with a conventional nickel screen, in a high current density of 4000A / m<2>, the electrode can reduce the hydrogen evolution overpotential by 250 mV. In a situation of frequent startup and shutdown, the voltage of an electrolytic bath is stable, and the fluctuation amplitude is small.

The invention discloses a heat reflecting paint, and a preparation method and an application thereof. The heat reflecting paint comprises the following components in parts by weight: 100 parts of fluorine-containing (methyl) acrylate polymer emulsion, 2-30 parts of reflecting pigment, 0.1-4 parts of filler, 2-40 parts of flatting agent, 1-20 parts of coalescing agent, 0.01-1 part of thickening agent, 0.01-2 parts of dispersant, 0.001-1 part of wetting agent, 0.1-60 parts of distilled water and 0.5-5 parts of cross-linking agent. The heat reflecting paint provided by the invention is high in heat reflection performance, and excellent in acid and alkali resistance, weather fastness and stain resistance. The heat reflecting paint provided by the invention is applied to a bituminous pavement; the heat reflecting paint is capable of relieving the urban heat island effect by reducing the road surface temperature, and reducing the environmental pollution generated in the use process of the coating, and also capable of improving the stain resistance of the coating and ensuring persistent cooling effect of the heat reflecting coating.

The invention provides a magneto-resistive effect device having a CPP (current perpendicular to plane) structure comprising a nonmagnetic spacer layer, and a fixed magnetized layer and a free layer stacked one upon another with said nonmagnetic spacer layer sandwiched between them, with a sense current applied in a stacking direction, wherein said free layer functions such that its magnetization direction changes depending on an external magnetic field, and is made up of a multilayer structure including a Heusler alloy layer, wherein an Fe layer is formed on one of both planes of said Heusler alloy layer in the stacking direction, wherein said one plane is near to at least a nonmagnetic spacer layer side, and said fixed magnetization layer is made up of a multilayer structure including a Heusler alloy layer, wherein Fe layers are formed on both plane sides of said Heusler alloy layer in the stacking direction with said Heusler alloy layer sandwiched between them. It is thus possible to prevent diffusion of Co atoms contained in the CoFe layer into the Heusler alloy layer, enabling the decrease in the spin polarizability of the Heusler alloy layer to be hold back and achieving a high MR ratio.

The invention relates to a cobalt-nickel selenide nitrogen-doped amorphous carbon nano composite negative electrode material as well as preparation and application thereof. The preparation method specifically comprises the following steps of (a) adding a cobalt source, a nickel source and hexadecyl trimethyl ammonium bromide into a 2-methylimidazole aqueous solution, stirring to form a mixed solution, standing and separating to obtain a precipitate, washing and drying to obtain NiCo-ZIF-67; and (b) selenizing the NiCo-ZIF-67 obtained in the step (a) by adopting elemental selenium, and then washing and drying to obtain the cobalt-nickel selenide nitrogen-doped amorphous carbon nano composite negative electrode material. The cobalt nickel selenide nitrogen-doped amorphous carbon nano composite negative electrode material is prepared into a sodium-ion battery negative electrode plate, and then the sodium-ion battery negative electrode plate, a metal sodium plate and an electrolyte are assembled into a sodium-ion battery. Compared with the prior art, the nano composite negative electrode material provided by the invention improves the electrochemical performance of the battery, has excellent electrochemical sodium storage performance, and is a good sodium ion battery negative electrode material.

A magnetoresistive device including a high-resistivity layer (13), a first magnetic layer (12) and a second magnetic layer (14), the first magnetic layer (12) and the second magnetic layer (14) being arranged so as to sandwich the high-resistivity layer (13), wherein the high-resistivity layer (13) is a barrier for passing tunneling electrons between the first magnetic layer (12) and the second magnetic layer (14), and contains at least one element LONC selected from oxygen, nitrogen and carbon; at least one layer A selected from the first magnetic layer (12) and the second magnetic layer (14) contains at least one metal element M selected from Fe, Ni and Co, and an element RCP different from the metal element M; and the element RCP combines with the element LONC more easily in terms of energy than the metal element M. Accordingly, a novel magnetoresistive device having a low junction resistance and a high MR can be obtained.

The invention relates to a reduced graphene oxide / stannate sodium ion battery negative electrode material and a preparation method and application thereof. The preparation method comprises the following steps: dispersing an aqueous solution of chlorate and sodium stannate in a graphene oxide solution, performing a hydrothermal reaction to produce a suspension, performing solid-liquid separation toobtain a precipitate, and calcinating the precipitate at high temperature to obtain the reduced graphene oxide / stannate sodium ion battery negative electrode material, wherein the chlorate is manganese chloride, cobalt chloride hexahydrate or zinc chloride. Compared with the prior art, the preparation method provided by the invention has the advantages of a simple technology, easy process control, easy obtainment of raw materials, low cost and good repeatability. A prepared reduced graphene oxide / stannate (manganese stannate, cobalt stannate and zinc stannate) composite structure has good electrochemical sodium storage performance, and is a good sodium ion battery negative electrode material.

The embodiment of the invention provides an array substrate, a display panel, a display device and a driving method for the array substrate, relates to the technical field of liquid crystal display, and aims to prevent a common electrode block from providing pulse signals of the same polarity for a long time in order to lower the polarizing probability of corresponding liquid crystal and improve undesirable display. The array substrate provided by the embodiment of the invention comprises a common electrode layer, at least one touch control signal line and a driving signal module, wherein the common electrode layer comprises at least one common electrode block; each touch control signal line is connected with a corresponding common electrode block; each touch control signal line is connected with the driving signal module; the driving signal module is used for outputting at least two touch control driving signals which are reverse in polarities to the at least one common electrode block at each touch control stage. The technical scheme is mainly applied to touch control liquid crystal display products.

The invention discloses an anticorrosive paint for building materials. The anticorrosive paint is prepared from the following raw materials in parts by weight: 40-50 parts of modified acrylic emulsion, 0.8-1 part of modified graphene, 9-13 parts of titanium dioxide, 8-10 parts of talcum powder, 1.2-1.6 parts of an antirust additive, 5-6 parts of an assistant and 20-30 parts of deionized water. Theinvention also discloses a preparation method of the anticorrosive paint. Modified acrylic emulsion is used as a film-forming substance of the paint, so that the paint not only has a good film-forming property and adhesive force, but also has excellent water resistance and aging resistance. By adding the antirust additive, an antirust effect can be achieved, and a corrosion inhibition function isachieved. Modified graphene is added to serve as an excellent shielding layer, so that the contact between building materials and a corrosive medium is prevented, and the corrosion resistance is enhanced. The paint is better combined with a matrix, and plays corresponding effects more easily. The aqueous anticorrosive paint has an excellent comprehensive performance and is suitable for protectingmetal building materials.

The invention discloses a fluorine-containing light-cured waterborne coating and a preparation method thereof. The light-cured waterborne coating is prepared from the components in parts by weight: 100 parts of solvent (a), 1-69 parts of light-cured fluorine-containing resin (b) and 0.05-3.45 parts of cross-linking agent (c), wherein the light-cured fluorine-containing resin (b) is prepared by virtue of copolymerization of fluorine monomers, N-vinyl pyrrolidone and monomers containing light active groups. The fluorine-containing light-cured waterborne coating has the excellent performances of short curing time, strong hydrophilicity and high lubricity.

A laminated piezoelectric device comprising a device body 10 on which a number of piezoelectric layers 2 and internal electrodes 3, 4 are laminated, external electrodes 5, 6 electrically connected to the internal electrodes 3, 4 and formed on the surface of the device body 10, an insulation layer 7 and a resistance layer 8. The insulation layer 7 covers at least a portion wherein internal electrodes 3, 4 are exposed on the surface of the device body 10, where mechanical displacement is generated by applying voltage. The resistance layer 8 is formed to connect between external electrodes 5, 6 and has a lower electric resistance value than the insulation layer 7.

The invention provides a hard polyimide foam material. The hard polyimide foam material contains glass fibers. The hard polyimide foam material has a porous closed-cell structure; and the glass fibers are compounded in the hard polyimide foam. The hard polyimide foam material provided by the invention contains the glass fibers, and the glass fibers and the polyimide foam matrix have a specific composite structure, so that the dielectric constant and the dielectric loss of the hard polyimide foam material can be reduced, and the effect of enhancing the mechanical property of the polyimide foam material is also achieved. The dielectric constant and the dielectric loss of the hard polyimide foam material are reduced by the two modes, namely chemically designing and modifying a polymer body structure, and physically modifying by adding a modifier into a system. In addition, polyimide is subjected to specific structural design, so that the purpose of reducing the dielectric constant is better achieved, and the polyimide can be used as an aircraft radome material.

The invention discloses a waterborne double-component epoxy resin coating containing an UV (ultraviolet) curable waterborne fluorine-containing epoxy curing agent. The waterborne double-component epoxy resin coating is composed of the following components in parts by weight: 20-30 parts of the UV curable waterborne fluorine-containing epoxy curing agent, 80-100 parts of waterborne epoxy resin emulsion, 20-30 parts of trimethylolpropane triacrylate, 3-6 parts of a photoinitiator, 1-3 parts of a levelling agent, and 0.2-1 part of a wetting dispersant. The preparation method comprises the following steps of: uniformly mixing and dispersing the UV curable waterborne fluorine-containing epoxy curing agent with trimethylolpropane triacrylate at first; then adding the levelling agent, the wetting dispersant and the photoinitiator, and uniformly stirring to prepare a varnish; and then adding the waterborne epoxy resin emulsion, and uniformly mixing and stirring to obtain the waterborne double-component epoxy resin coating containing the UV curable waterborne fluorine-containing epoxy curing agent. The coated film obtained after coating and curing the waterborne double-component epoxy resin coating is good in flexibility, water resistance and alkali resistance, and small in contact angle for water.

The invention discloses a silicone rubber material with high corrosion resistance and a preparation method thereof, belonging to the field of rubber materials. According to the invention, modified silicone rubber and a thermoplastic polyurethane elastomer are added into an open mill for open milling; then a hydrolysis inhibitor and white carbon black are sequentially added for mixing and blanking; a rubber material is placed at room temperature, and then secondary mixing is performed; and the mixed rubber material is placed in a vulcanizing machine to complete vulcanization so as to obtain the high-corrosion-resistance silicone rubber material. According to the preparation method, the hydrophobic property and the stability of silicone rubber are improved by preparing the modified silicone rubber, and the hydrolysis inhibitor is prepared and is subjected to a ring-opening addition reaction with carboxyl groups, hydroxyl groups, amino groups and the like containing protons generated in the hydrolysis process of thermoplastic polyurethane elastomer, so the hydrolysis of the thermoplastic polyurethane elastomer is inhibited; and under the synergistic effect of the modified silicone rubber and the hydrolysis inhibitor, the silicone rubber-polyurethane composite material has excellent mechanical properties and excellent corrosion resistance.

A magnetoresistive effect element (MR element) includes first and second magnetic layers of which relative angles formed by magnetization directions change in relation to an external magnetic field; and a spacer layer positioned between the first magnetic layer and the second magnetic layer. The first magnetic layer is positioned on a side closer than the second magnetic layer in regards to a substrate above which the magnetoresistive effect element is formed, and the spacer layer includes a main spacer layer made of gallium oxide as the primary component, and a first nonmagnetic layer positioned between the main spacer layer and the first magnetic layer and contains copper and gallium.

The invention belongs to the technical field of coatings, and particularly relates to a preparation method of stain-resistant real stone paint. The carbon nano tubes and the argil are coated, so thatthe pigment in the color sand is not radiated by light rays; titanium dioxide also has the function of absorbing and converting ultraviolet rays, so that the stone-like paint has good ultraviolet aging resistance; a layer of fluorosilane molecules is formed on the surface of the titanium dioxide nanoparticles in the real stone paint coating; fluorine atoms in fluorosilane molecules of the coatinglayer are high in electronegativity, so that the bond energy of a single bond formed by the fluorosilane molecules and other elements is larger than that of a single bond formed by carbon atoms and other elements, and due to the fact that the carbon chains in the fluorosilane molecules are protected by the original space barrier effect, fluorosilane has good chemical stability and low surface freeenergy. The fluorosilane surface coating layer reduces the Van Der Waals' force of titanium dioxide nanoparticles on water and the effect of hydrogen bonds and greatly increases the contact angle ofthe surface of a paint film, so that the product shows super-hydrophobicity. The preparation method can obviously improve the stain resistance of the real stone paint, and has a wide application prospect.

The invention discloses a PDCPD material for a 5G base station housing and a preparation method of the PDCPD material. The material comprises a component A and a component B, the component A is prepared from the following raw materials in parts by weight: 40 to 60 parts of dicyclopentadiene, 0.1 to 0.15 part of a Grubbs first-generation catalyst and 15 to 25 parts of wave-transparent particles; the component B is prepared from the following raw materials in parts by weight: 40 to 60 parts of dicyclopentadiene, 2 to 8 parts of antimony trioxide, 3 to 10 parts of aluminum hydroxide, 0.1 to 0.15 part of tungsten hexachloride and 5 to 10 parts of light aging resistant agent; according to the wave-transparent particles, F atoms are introduced, the density of an intermediate 3 is reduced, and two trifluoromethyl groups on bisphenol AF are used for preventing stacking of molecules and increasing the free volume of the wave-transparent particles, so that the dielectric coefficient of the material is reduced, the light-aging-resistant agent can convert light energy into heat energy to be released, and meanwhile, the molecules of the light-aging-resistant agent are of a macromolecular latticed structure, so that the light-aging-resistant agent has a good light-aging-resistant effect. And precipitation and volatilization caused by long-time use are effectively avoided.

The invention belongs to the technical field of preparation of adhesives, and relates to a preparation method of an adhesive for making a board from crop straws, which comprises the following steps: dissolving diphenylmethane diisocyanate and polyether glycol NJ-330 in acetone; and by using dibutyltin dilaurate as a catalyst, adding hydroxypropyl methacrylate to perform termination, and adding fluorine-containing acrylate monomer to react by using azodiisobutyronitrile as an initiator, thereby obtaining the adhesive. The adhesive prepared by the method provided by the invention is free of free formaldehyde monomer. The fluorine element is introduced into an isocyanate adhesive system; fluorine atoms with lower polarizability, strong electronegativity and small Van der Waals radius can be combined with carbon atoms to form a high-bond-energy C-F bond, and the main group -CF3 of the fluorocarbon compounds has extremely low surface energy, so that the adhesive has high stability; after the adhesive forms the film, the film has favorable water resistance and mechanical properties, has strong bonding action with the straws subjected to surface treatment; and the adhesive can be used for preparing an artificial straw board according to a common artificial fiber board production technique.

A magneto-resistive effect (MR) element includes first and second magnetic layers in which a relative angle formed by magnetization directions changes in response to an external magnetic field, and a spacer layer positioned between the first magnetic layer and the second magnetic layer. The first magnetic layer is positioned closer to a substrate above which the MR element is formed than the second magnetic layer. The spacer layer includes a copper layer, a metal intermediate layer and a main spacer layer composed of gallium oxide as a primary component. The copper layer and the metal intermediate layer are positioned between the main spacer layer and the first magnetic layer. The metal intermediate layer is positioned between the copper layer and the main spacer layer. The metal intermediate layer is composed of at least one member selected from a group consisting of one of magnesium and at least partially oxidized magnesium, one of aluminum and at least partially oxidized aluminum, and one of zinc and at least partially oxidized zinc, as a primary component.

A magneto-resistive effect (MR) element includes first and second magnetic layers where a relative angle formed by magnetization directions changes in response to an external magnetic field and a spacer layer positioned between the first magnetic layer and the second magnetic layer. The first magnetic layer is positioned closer to a substrate above which the MR element is formed than the second magnetic layer. The spacer layer includes a main spacer layer that is composed of gallium oxide as a primary component and a bottom layer that is positioned between the main spacer layer and the first magnetic layer and that is composed of partially oxidized copper as a primary component.

The invention discloses a gallium oxide film and a heteroepitaxial growth method and application thereof. The heteroepitaxial growth method comprises the following steps: carrying out vapor phase epitaxial growth on a substrate material to form a gallium oxide nanowire array; and, by controlling the growth conditions, enabling the gallium oxide nanowires in the gallium oxide nanowire array to transversely merge and grow, thereby forming the gallium oxide thin film on the gallium oxide nanowire array through epitaxial growth. According to the invention, the gallium oxide nanowire arrays are combined to grow the beta Ga2O3 film, so that the [beta]-Ga2O3 film is prevented from directly growing on the substrate, the mismatch degree between heteroepitaxial materials and the difficulty of a heteroepitaxial process are greatly reduced, and the crystal quality of the [beta]-Ga2O3 film is improved; and by controlling the diameter and the period of the gallium oxide nanowire, the grain nucleation size can be well increased, the influence of the small nucleation size on the crystal quality is avoided, the growth of the [beta]-Ga2O3 film can be realized at the temperature of 300 DEG C-1000 DEGC, and the energy consumption can be effectively reduced.

The invention provides a polyimide nano foam and a preparation method thereof. The preparation method comprises the following steps: a) reacting a diamine compound, a dianhydride compound and a thermally unstable substance in a solvent to obtain a polyimide nano foam imide film; the diamine compound includes diamine and polysiloxane diamine containing adamantane groups; b) thermally decomposing the polyimide film obtained in step a) to obtain polyimide nano Foam. The present invention adopts the diamine compound including diamine containing adamantane group and polysiloxane diamine as raw material to prepare polyimide nano foam, innovatively introduces polysiloxane structure into polyimide containing adamantane group In the imide molecular chain, the introduced polysiloxane soft segment and the polyimide rigid segment containing adamantane group produce microphase separation, thereby increasing the free volume of the molecule, reducing the polarizability of the molecule, and effectively reducing The dielectric constant and water absorption of the product; increasing the surface tension of the system is conducive to the formation of cells.

The invention relates to lithium-aluminum silicon-series glass material allowing photolithography, and a preparation method and an application thereof. The lithium-aluminum silicon-series glass material includes, by weight, 72-76% of SiO2, 10-15% of Li2O, 3-4% of K2O, 6-8% of Al2O3, 2-3% of Na2O, 1-1.2% of ZnO, 0.8-1.5% of Sb2O3, 0.04-0.08% of Ce2O3, and 0.04-0.08% of Ag2O. The silicon-series glass material has simple and definite material composition and simple production process, and has the equal photosensitiveness as the similar glass products.