205results about How to "Excellent thermal" patented technology

An aspect of the present invention relates to a hexagonal barium ferrite magnetic particle, wherein, relative to 100 atom percent of a Fe content, an Al content ranges from 1.5 to 15 atom percent, a combined content of a divalent element and a pentavalent element ranges from 1.0 to 10 atom percent, an atomic ratio of a content of the divalent element to a content of the pentavalent element is greater than 2.0 but less than 4.0, and an activation volume ranges from 1,300 to 1,800 nm3.

Provided is a method of joining compound materials such as ceramics. The method is a combination of diffusion bonding and reaction bonding, which is called reaction diffusion bonding (RDB). The method includes: grinding, lapping, or polishing entire or portions of surfaces to be joined of two or more pieces of a compound material; forming a thin film of a joining agent on one or more of the ground, lapped, or polished surfaces by one of inserting, spreading, depositing, plating, and coating, the joining agent being able to transform into the compound material by being incorporated into the compound material or by forming a solid solution with the compound material upon heat treating; and forming a directly bonded interface without a second phase by heat treating the pieces of the compound material with the to-be-joined surfaces on which the joining agent film is formed arranged to face each other, wherein the joining agent thin film is composed of a material selected from the group consisting of metals, metal organics, and metal compounds.

Compositions of the formulae (I), (II) and (III); where R1, R2 and R3 are residues of amino acids such as, but not limited to, valine, sarcosine, leucine, glutamine, tryptophan, tyrosine, alanine and 4(4-aminophenyl)butyric acid or combination thereof, and salts thereof. Methods of preparation of these compositions and methods of treating any disease condition responsive to THC comprising administration of at least one these compositions in a pharmaceutically acceptable carrier using a pharmaceutically acceptable formulation.

The invention relates to the field of preparation and application of two-dimensional materials, in particular to a method for effectively preparing a high-orientation and high-compactness two-dimensional material thin film. The method comprises the following steps: taking a circular tube with a smooth inner surface as a casting die; pouring a solution which contains a two-dimensional material intothe die when the die rotates in the peripheral direction at high speed; uniformly coating the inner surface of the die with the solution by using centrifugal force; forming shear force which drives the two-dimensional material to be regularly arranged layer by layer in an oriented manner in the peripheral direction in the solution in a centrifugal rotating process; and meanwhile, driving the two-dimensional material to be accumulated at high compactness by the centrifugal force so as to obtain the two-dimensional material thin film with high orientation and high compactness. The method is suitable for preparing various two-dimensional materials such as graphene, and composite thin films and laminated heterostructure thin films of the two-dimensional materials; electric property, heat property, mechanical property and the like of the thin film are greatly improved; and the method is used in the field of high-performance electric conduction / heat-conduction thin films, heat management materials, high-strength thin films, electronic / optoelectronic devices, compact energy storage, gas / ion separating films, proton transmitting films and the like.

The invention discloses a preparing method of a copper-base electric contact material enhanced by in-situ grown grapheme, relates to the preparing method of the copper-base electric contact material, solves the problems that a conventional silver-base electric contact composite material is high in cost and low in cost performance, and overcomes the defect that when a copper-base composite material with high performance replaces metal silver, grapheme is dispersed in copper nonuniformly. The method comprises the following steps: placing copper powder in a plasma enhanced chemical vapor deposition vacuum device, introducing hydrogen, insulating at a high temperature, introducing methane gas for deposition, stopping introducing methane gas after the deposition is finished, and finally cooling to be below the room temperature to obtain grapheme / copper composite powder.

An autoclavable sterilization bag is provided having first and second composite film laminates positioned in opposing relation and sealed to one another to form a pouch. At least the first laminate comprises a heat sealable transparent thermoplastic polymer inner layer forming an inner surface of the laminate and a transparent polymer film outer layer. A transparent barrier layer is located between the inner and outer layers and formed of molecularly oriented polychlorotrifluoroethylene (PCTFE). In advantageous specific embodiments of the invention, the heat sealable transparent thermoplastic polymer inner layer is a polyolefin film, and the transparent polymer outer layer is a film selected from the group consisting of polyethylene terephthalate, nylon, polypropylene, polyethylene and cellophane.

The invention relates to eutectoid electrolyte and a secondary zinc battery using the eutectoid electrolyte. The eutectoid electrolyte contains an acylamino-contained compound and an ionizable organicmetal salt. The eutectoid electrolyte provided by the invention has the characteristics of low viscosity, high ionic conductivity, wide electrochemical window, low cost and insensitiveness to water and air; meanwhile, reversibility and stability of electrochemical deposition / dissolution can be remarkably improved by an interface protecting layer formed by in-situ decomposition of organic anions,so that the problem of poor cycle life of the secondary zinc battery is effectively solved. The secondary zinc battery using the eutectoid electrolyte has the advantages of good charge-discharge cycleperformance, greenness, environmental protection and low price.

The invention discloses a method for fabricating a round and smooth curved surface microstructure, which is characterized by comprising the following steps: taking a negative chemically amplified photoresist as a material for fabricating the round and smooth curved surface microstructure; firstly carrying out spin coating of the first layer of the negative chemically amplified photoresist on a substrate, soft baking and exposing, and then directly carrying out spin coating of the second layer of the negative chemically amplified photoresist on the first layer of the negative chemically amplified photoresist, and post-baking; and catalyzing photoresist molecules for cross-linking in an exposure area and an adjacent diffusion area thereof by isotropic diffusion of photo acid generated afterexposure of the first layer of the photoresist during the post-baking process, and developing the cross-linked photoresist molecules to obtain the microstructure with round and smooth curved surface characteristics. Relative to the traditional gray scale mask technology and the traditional photoresist reflowing method, the method for fabricating the round and smooth curved surface microstructure has the characteristics of simple processing, low cost, stable structure and the like.

A table for a wafer polishing apparatus having superior heat-resistant, anti-thermal-shock, and anti-abrasion characteristics and capable of increasing the diameter of a semiconductor wafer while improving the quality of the wafer. The table (2) includes a plurality of superimposed bases (11) each of which is formed of silicide ceramic or carbide ceramic. The bases (11) are joined together by an adhesive layer (14). A fluid passage (12) is formed in a joining interface between the bases (11).

The invention relates to preparation methods for electric contact materials, in particular to a method for preparing an in-situ grown carbon nano tube reinforced silver-based electric contact material. The method aims to solve the technical problems that when a common CNTs / Ag composite material preparation method is adopted, carbon nano tubes are not dispersed uniformly, and a large number of structural defects exist. The method comprises the steps that firstly, Ni(NO3)2 / Ag composite powder is prepared; secondly, a plasma method is adopted for preparation of the electric contact material. According to the method, since the plasma reinforced chemical vapor deposition method is adopted for low-temperature in-situ growth of the carbon nano tubes, structural perfection and uniform dispersity of the carbon nano tubes in silver powder are guaranteed, clustering of the carbon nano tubes in CNTs / Ag-based electric contact composite powder is avoided, and the improvement on the performance of the CNTs / Ag-based electric contact composite powder by the carbon nano tubes is realized in a true sense. The method is used for preparing the in-situ grown carbon nano tube reinforced silver-based electric contact material.

The invention relates to light-resistant antibacterial water-based polyurethane coating and a preparation method thereof. The light-resistant antibacterial water-based polyurethane coating is preparedfrom the following raw materials of light-resistant antibacterial compounds, oligomeric polyols, polyisocyanates, catalysts, chain expanding agents, crosslinking agents and neutralizers, wherein thelight-resistant antibacterial compounds are oxidized graphene-cyclodextrin-antibacterial agent compounds and are obtained by modifying oxidized graphene by antibacterial agent coated cyclodextrin. Thecyclodextrin molecules are used for modifying the oxidized graphene; meanwhile, the antibacterial agents are contained in an inner cavity of the cyclodextrin molecules; the oxidized graphene-cyclodextrin-antibacterial agent light-resistant antibacterial compounds are obtained; the light-resistant antibacterial compounds are added into the water-based polyurethane coating, so that the water-basedpolyurethane coating has excellent ultraviolet light resistant performance, high-temperature-resistant performance, anti-aging performance, acid-alkali-resistant performance, antibacterial performanceand the like.

The invention discloses carbon nanotubes and the preparation method of the polymer graft modification, which adopts the acyl groups on the surface of the carbon nanotubes to initiate the ring-shaped monomeric compound to carry out cationic ring-opening polymerization reaction and gain the carbon nanotubes of the polymer graft modification. The invention realizes the surface modification of the carbon nanotubes via simple steps and can regulate the hydrophile and lipophilicity of the surface of the carbon nanotubes. The carbon nanotubes of the gained polymer graft modification and the carbon nanotubes of the polymer salt graft modification in different solvent show good solubility and polymer compatibility, thereby can be used as functional additive to improve the performances such as the electricity, magnetics, heat and mechanics of the polymer.