78results about How to "Reduce polarizability" patented technology

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.

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 L_ONC 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 R_CP different from the metal element M; and the element R_CP combines with the element L_ONC 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 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 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 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.