82results about How to "Strong repulsion" patented technology

A chemical mechanical planarization (CMP) apparatus is provided. The CMP apparatus includes at least one platen; and a polishing pad disposed on the platen. The CMP apparatus also includes a polishing head disposed above the platen and configured to clamp a to-be-polished wafer; and a basic solution supply port disposed above the platen and configured to supply a basic solution onto a surface of the polishing pad. Further, the CMP apparatus includes a slurry arm disposed above the platen and configured to supply a polish slurry on the surface of the polishing pad; and a deionized water supply port configured to supply deionized water onto the surface of the polishing pad. Further, the CMP apparatus also includes a negative power source configured to apply a negative voltage onto the surface of the polishing pad.

A method of preparing a mortar composition, comprising mixing of mortar materials comprising at least 25 to 45 parts by weight of high-early-strength portland cement, 40 to 60 parts by weight of sand, 0.05 to 0.12 parts by weight of polycarboxylic acid-based powdered water reducing agent, and 10 to 25 parts by weight of water, and not comprising any organic adhesives. Mixing of the mortar materials is achieved by agitating the same in an agitator until agitating load rapidly decreases. The mortar composition prepared in accordance with this invention has excellent ability to infiltrate into the surface to be adhered, and high bonding strength after hardening.

A passive magnetic suspension acts as an electric motor with the introduction of lead means, such as motor windings, to harness and output the generated torque or voltage from the magnetic fields. The magnetic suspension consists of at least one magnetic element (typically a disc) fixed to a stator element (typically a shaft) and surrounded by two or more planetary magnets on the rotor. Having all magnet poles oriented in the same direction results in strong repulsion forces which provide the radial magnetic suspension. Segmenting the rotor magnet creates multiple unipolar magnetic fields, enabling additional possibilities in the introduction of windings to output the generated torque and provide motor function.

An electronic casing and a method of manufacturing the same are provided. The method includes the following steps. Step (a): a metal laminate and a die of a predetermined shape are provided. The metal laminate comprises a metal top layer and a metal bottom layer that are bonded by interface atom diffusion. Step (b): the metal laminate is processed to form a casing blank by using the die, and the casing blank has at least one turning portion. Step (c): a profiler of a predetermined shape and an electromagnetic forming device are provided. Step (d): the casing blank is attached to the profiler, and the electromagnetic forming device is disposed at a position corresponding to the turning portion. Step (e): the electromagnetic forming device is activated, so that the casing blank has a shape corresponding to the predetermined shape of the profiler.

The invention provides a preparation method of manganese-zinc ferrite with a high magnetic conductivity. Fe2O3, ZnO and MnO which are used as raw materials undergo primary ball-milling and presintering to realize primary ferritization, and then undergo secondary ball-milling crushing and granulation to obtain manganese-zinc ferrite particles, and the particles are molded and sintered to obtain a manganese-zinc ferrite powder. The Fe2O3, ZnO and MnO are mixed in a ball mill, triethanolamine or triethanolamine sulfate is added, large particles are broken by utilizing the mechanical force of theball mill to form small particles, the triethanolamine or triethanolamine sulfate can be effectively adsorbed on the surfaces of the particles in an electrostatic manner as a dispersant, so secondaryagglomeration of the particles is prevented, thereby the particle size of the ball-milled particles is small, and the magnetic conductivity of the obtained manganese-zinc ferrite powder is high; and calcium lignosulphonate is decomposed into CaO in the subsequent sintering process, and is deposited at the grain boundary, so the resistivity of the product is improved, thereby the magnetic conductivity of the manganese-zinc ferrite powder is improved.

A method of preparing a mortar composition, comprising mixing of mortar materials comprising at least 25 to 45 parts by weight of high-early-strength portland cement, 40 to 60 parts by weight of sand, 0.05 to 0.12 parts by weight of polycarboxylic acid-based powdered water reducing agent, and 10 to 25 parts by weight of water, and not comprising any organic adhesives. Mixing of the mortar materials is achieved by agitating the same in an agitator until agitating load rapidly decreases. The mortar composition prepared in accordance with this invention has excellent ability to infiltrate into the surface to be adhered, and high bonding strength after hardening.

The invention discloses a new material for electric heating parquet with a built-in heating layer. The new material contains melamine modified urea-formaldehyde resin adhesive bonded with carbon fiber paper. A preparing method for the melamine modified urea-formaldehyde resin adhesive includes the following steps that 1, polyamide is prepared, wherein an appropriate amount of water is added into 30-40 parts of diethylenetriamine, the mixture is stirred, 40-50 parts of hexanedioic acid are added in the stirring process, after stirring is conducted for 30 min, temperature is uniformly raised to 150 DEG C-170 DEG C within 1-5 h, kept for 15 min and then lowered to 80 DEG C-120 DEG C, an appropriate amount of water is added for cooling, and the mixture is heated to 80 DEG C-120 DEG C again and uniformly stirred to obtain polyamide; 2, the pH value of 40-60 parts of a formaldehyde solution is adjusted to 9.5, then 15-30 parts of urea are added, the mixed solution is heated to 85 DEG C-95 DEG C to react for 40-60 min, the pH value is adjusted to 5, after the sufficient reaction, 10-20 parts of polyamide and 20-30 parts of melamine are added, 5-10 parts of epoxy chloropropane are added dropwise, and all the substances react while stirred so that melamine modified urea-formaldehyde resin adhesive can be obtained after the reaction is finished.

The invention relates to a palladium-containing catalyst and a preparation method thereof, a composition prepared from the palladium-containing catalyst, and application of the composition. The structural formula of the palladium-containing catalyst is described in the description. The preparation method of the palladium-containing catalyst comprises the following steps: firstly, dissolving 2-hydroxy-1,4-naphthoquinone and substituted aniline into an organic solvent for carrying out a reaction so as to obtain an aniline naphthoquinone ligand; dissolving the aniline naphthoquinone ligand into an organic solvent, and adding a hydrogen extraction reagent for carrying out a reaction so as to obtain a ligand salt compound; adding a palladium precursor into the ligand salt compound for carryingout a reaction so as to obtain an intermediate metal complex; finally, adding a pyridine reagent into the intermediate metal complex for carrying out a reaction to obtain the catalyst. The compositioncan be prepared from the palladium-containing catalyst and a catalyst promoter. The palladium-containing catalyst uses palladium as a metal center, is higher in activity of catalyzing homopolymerization of ethylene and copolymerization of olefin and a polar monomer, also can reach a certain activity without needing a catalyst promoter, and is good in economical efficiency and high in polarity/functional monomer insertion rate. The composition prepared from the palladium-containing catalyst has higher catalytic activity when a very small amount of the catalyst promoter is used.

The invention discloses a lifting rotation assembly for bridge swivel construction. The lifting rotation assembly for the bridge swivel construction comprises a balancing lifting seat; a swivel seat is arranged on the balancing lifting seat; the balancing lifting seat comprises a lifting base; a jacking assembly is arranged on the lifting base; the jacking assembly comprises a central jacking piece; multiple groups of stabilizing jacking pieces are uniformly distributed around the central jacking piece; the swivel seat comprises an upper seat body and a lower seat body which are in normal running fit with each other; an electromagnetic power assisting assembly is arranged between the upper seat body and the lower seat body; and the lower seat body lies on the central jacking piece and allstabilizing jacking pieces. The lifting rotation assembly for the bridge swivel construction has the advantageous effects that the balance of a bridge swivel is convenient to maintain by adjusting thejacking forces of the multiple stabilizing jacking pieces on the balancing lifting seat; and meanwhile, by using the electromagnetic power assisting assembly, a rolling supporting body and a roller deflection prevention mechanism, the friction force between an upper swivel seat and a lower swivel seat is reduced; and the lifting rotation assembly for the bridge swivel construction is conducive toimproving the balance and reliability of a swivel system and enhancing the convenience of the swivel construction.

The invention relates to a method for preparing color carbon powder by adopting a suspension polymerization method, and solves the problems that carbon powder is instable in quality and the selection of raw materials is limited in a traditional suspension polymerization method. According to the technical scheme, the method comprises the following steps: melting a coloring agent and resin, mixing the melt coloring agent and resin so as to obtain a mixture I, extruding the mixture I and crushing to obtain color master batch; adding the color master batch, wax and an initiator into monomers to obtain a mixture II, heating and stirring to dissolve the mixture II to obtain an organic phase containing the coloring agent, resin, initiator, wax and monomers; adding the organic phase into an aqueous solution containing a surface active agent, carrying out shearing dispersing on the organic phase in the aqueous solution to obtain turbid liquid, polymerizing the turbid liquid in a heating manner to obtain a color carbon powder matrix, finally filtering the color carbon powder matrix, washing the filtered color carbon powder matrix, drying, and mixing the color carbon powder matrix with additives to obtain the color carbon powder. The method is simple in procedure, low in process difficulty, easy to control, wide in raw material selection range and relatively few in adverse impact factors, and the obtained color carbon powder is relatively narrow in granularity distribution, relatively few in small particles and stable and reliable in quality.

The invention discloses a method for preparing a Bi-doped ZnS photocatalyst by taking ionic liquid as a template, belonging to the field of chemistry. The method comprises the steps of carrying out ultrasonic dissolution on ZnS, feeding the product into a Bi(NO3)3 water solution, dripping C8H15N2BF4 ionic liquid into the solution to form suspension, dispersing, drying, carrying out centrifugal separation, washing and drying to obtain the Bi-doped ZnS nanosphere photocatalyst. The method is simple in steps and environment-friendly in preparation technology; the product is good in performance.

The invention discloses a magnetic motor, and the magnetic motor comprises stators and rotors. The rotors re disposed on a rotor shaft, and the stators are disposed on a stator housing. The rotor shaft is located at the center of the stator housing. The magnetic motor is characterized in that the rotors and the stators are arranged in parallel at a preset interval in a staggered manner; the stators are respectively provided with a through hole which is used for the passing of the rotor shaft; the rotor surface and stator surface of the adjacent rotors and stators are opposite; the rotor surface is provided with first magnetic strips at intervals, wherein the magnetic strips extend radially to the outer edge of the rotor surface from the rotor shaft; the stator surface is provided with second magnetic strips which extend in a non-radial direction to the edge of the stator surface from the edge of the through hole; the magnetism of the first magnetic strips and the magnetism of the second magnetic strips are the same, thereby generating a repulsive force to enable the rotors to rotate around the rotator shaft and output power. The stators and the rotors are arranged in parallel in a staggered manner, and the first inclined surfaces of the first magnetic strips are opposite to the second inclined surfaces of the second magnetic strips, thereby generating a large-area repulsive force, enabling the rotors to output strong power, and improving the energy conversion efficiency.

The invention provides an arc fuse wire additive manufacturing method for a porous material. By taking a single arc or multiple heat sources as the heat source of fuse wire additive manufacturing, molten drops are transited in an unstable form by adjusting parameters such as arc height, angle, current and voltage in a stacking process and applying prearranged gas to interfere the arc shape and themolten drop shape, so that the molten drops entering a bath splash so as to from a metal structure comprising a lot of fixed dimensional holes. The hole dimension can be designed by controlling the arc parameters. Software and a numerically controlled system are processed according to a predetermined path to manufacture a porous material structural part of a special shape. The method can preparethe porous material efficiently by regulating the arc.

The invention provides a preparation method of perfluorotriethylamino high-heat-conducting lubricating nano-fluid and belongs to the field of preparation of a composite liquid working medium of a fluid loop system for a spacecraft. Efficient heat exchange and effective lubrication of the fluid loop system are realized through preparing fluorinated graphene-perfluorotriethylamino nano fluid; a hydrothermal method is adopted and hydrofluoric acid is used as a fluorinating reagent to carry out fluorination on graphene oxide, so as to successfully prepare multilayered fluorinated graphene; experiment equipment is relatively simple and a preparation process is easy to operate. The fluorine ratio on the surface of graphene can be controlled and adjusted. The graphene subjected to fluorination treatment has good dispersity in a perfluorotriethylamino working medium; a dispersant is not needed so that the heat resistance of a heat transferring interface can be reduced and the heat conductivityof the nano-fluid is remarkably improved. Fluorine atoms are inserted into graphene lamellas, the inter-lamellar spacing is enlarged and the acting force between layers is reduced; meanwhile, a strong repulsive force action between the fluorine atoms is very good for sliding between the layers, and the wear-reduction lubricating performance of the nano-fluid can be remarkably improved.

The invention belongs to the technical field of spring machining, particularly relates to a spraying device for spring machining, and aims to solve the problem that the existing spraying device easily swings during hanging due to troublesome fixation in the spraying process. According to the following scheme, the spraying device comprises a working bin, wherein a spraying cavity and a collecting cavity are sequentially formed in one side of the interior of the working bin from top to bottom, and a drying cavity is formed in the other side in the working bin. A counterweight ball, a magnetic block and a supporting sleeve are sequentially arranged in a vertical rod from top to bottom, the counterweight ball increases the weight of the vertical rod to enable the gravity center of the vertical rod to be stable, the magnetic block can be pushed out by a telescopic rod, and a spring is hung at the lowest end of a hook; when the telescopic rod extends to the longest position, the vertical center line of the magnetic block coincides with the vertical center line of the hook; the repelling effect of the magnetic block and the spring is the strongest; a rubber inner ring and a rubber outer ring are arranged at the two ends of the spring to limit displacement of the spring; and meanwhile, trapezoidal blocks in a circumferential array extrude the top end and the upper end of the spring, and the situation that the spring shakes and consequently the spraying efficiency is reduced is avoided.