187 results about "Magnetic coating" patented technology

An antenna coil includes an air-core coil wound helically in a plane and a plate magnetic core member inserted in the air-core coil to be approximately parallel with a plane of the air-core coil. The magnetic core member is formed by a soft magnetic metal, an amorphous or ferrite, or a composite member of a powder, flake and plastic, or rubber. The magnetic core member is formed by performing an injection molding operation or a compressing molding operation of the composite member. Alternatively, the magnetic core member is a magnetic coating formed by applying and drying the composite member. A non-magnetic conductive plate that has a conductivity is layered on a surface of the air-core coil through which the magnetic core member is inserted. The conductive plate is made of a copper, a copper alloy, an aluminum or an aluminum alloy having 0.01 to 2 mm thickness. The antenna coil is operated by relatively high frequency while it is rigid relatively.

A magnetic coated carrier suitable for constituting a two-component type developer for use in electrophotography is composed of magnetic coated carrier particles comprising magnetic coated carrier particles comprising magnetic carrier core particles each comprising a binder resin and metal oxide particles, and a coating layer surface-coating each carrier core particle. The metal oxide particles have been subjected to a surface lipophilicity-imparting treatment. The magnetic carrier core particles have a resistivity of at least 1x1010 ohm.cm, and the magnetic coated carrier has a resistivity of at least 1x1012 ohm.cm. The magnetic coated carrier has a particle size distribution such that (i) it has a number-average particle size Dn of 5-100 mu m, (ii) it satisfies a relationship of Dn/ sigma >/=3.5, wherein sigma denotes a standard deviation of number-basis particle size distribution of the carrier, and (iii) it contains at most 25% by number of particles having particle sizes of at most Dnx+E,fra 2/3+EE .

Medical devices with surfaces on which viable biologic cells are magnetically attracted and retained are disclosed along with methods of magnetic coating. The medical devices can be located in a carrier liquid containing high concentrations of magnetic cells before or after implantation. The carrier liquid with magnetic cells may be contact with the medical device in vitro or in vivo. In either case, the carrier liquid may have a concentration of magnetic cells that is high enough to facilitate coating of the medical device within an acceptable period of time, e.g., several hours or less. Magnetization of medical devices before, during, and/or after implantation and apparatus for performing the same are disclosed. Degaussing of magnetic medical devices is also disclosed.

A magnet wire has a conductor and a coating layer. The coated layer is coated around the conductor and has at least one magnetic coating layer; and at least one insulating coating layer. The magnetic coating layer has non-conductive magnetic material. The insulating coating layer and the magnetic coating layer are formed alternately. The alternative structure of the magnetic coating layer and the insulating coating layer prevent precipitation of magnetic material and efficiently offsets the interference between conductors after electricity is supplied, which inhibits occurrence of eddy current and lowers alternative current (AC) resistance.

A key structure includes a base plate, a switch circuit board, a keycap, and an enclosure frame. The keycap includes a magnetic element. The magnetic element is disposed on an edge part of the keycap. The enclosure frame includes a magnetic coating layer. The magnetic coating layer is formed on an edge part of the enclosure frame and disposed over the magnetic element. When the keycap is depressed, the keycap is moved to trigger the switch circuit board, so that the switch circuit board generates a key signal. When the keycap is no longer depressed, the keycap is moved toward the magnetic coating layer in response to the magnetic force. The key structure can be normally operated without the need of installing an elastic rubbery element.

Disclosed is a resin coated metal sheet for use in electronic equipment components which can provide excellent microwave absorbability and workability by coating a magnetic coating film containing from 20 to 60 mass % of a magnetic powder at a thickness of 3 to 50 μm on at least one surface of a metal sheet and, optionally, also has a favorable heat releasing property; a heat releasing property and a self-cooling property; scratch resistance and fingerprint resistance; and electrical conductivity, and which is particularly useful as a constituent material as a casing for electronic equipment.

The invention provides a laser holographic anti-counterfeiting stamping foil containing magnetic encryption information and a preparation method thereof. A separation layer, an information recording layer and a medium layer are arranged in turn between a plastic carrier film layer and a bonding glue layer. The laser holographic anti-counterfeiting stamping foil is characterized in that a magnetic coat is also arranged between the medium layer and the bonding glue layer; moreover, a magnetic material is not printed on the surface of the stamping foil but coated on the medium layer; thus, the magnetic material cannot cover holographic patterns, and magnetic information writing and reading can be carried out through an instrument; therefore, the stamping foil not only contains holographic anti-counterfeiting information, but also has the function of magnetic encryption information anti-counterfeiting protection to obtain the effect of multiple anti counterfeiting.

The invention discloses a kind of UV-cured resin coated soft magnetic powder, a preparation method and application thereof. The UV-cured resin coated soft magnetic powder is mainly prepared from the following raw materials in parts by weight: 0.5-7 parts of UV-cured resin, 1-6 parts of reactive diluents, 0.05-6 parts of photo-initiator, 0.01-0.2 part of additive and 85-95 parts of soft magnetic powder. A water-based soft magnetic coating is prepared from the following raw materials in parts by weight: 45-65 parts of UV-cured resin coated soft magnetic powder, 5-20 parts of water-based adhesive, 0.5-5 parts of thickening agent, 9-35 parts of diluents and 0.5-5 parts of additive. The UV-cured resin coated soft magnetic powder is capable of prolonging service life of the coating; the coating is compact and magnetism gathering capacity is improved; the coating has less consumption and is relatively simple in construction.

A method for making a magnetic disk, without chemical mechanical polishing to remove asperities, includes the steps of placing an annular-shaped element in a vacuum chamber, exposing a surface of the element to a beam of gas clusters while it is in the vacuum chamber, and thereafter applying a magnetic coating. The annular-shaped element may be a substrate, or it may be a substrate with a base coating such as glassy carbon or amorphous carbon. The substrate may be made of glass, preferably high quality fusion glass. The surface of the annular element may be textured by forming a sequence of concentric annular valleys, with plateaus being left between the valleys, before the magnetic coating is applied. A semiconductor wafer may also be smoothed by a beam of gas clusters to prepare the wafer for photolithography.

The invention provides a cloth material capable of being automatically folded. The cloth material comprises a wrinkle fabric, a hard magnetic material coating layer and a soft magnetic material coating layer, wherein the hard magnetic material coating layer covers the wrinkle edges at two ends of the wrinkle fabric; the front surface of one folding surface of the wrinkle fabric is covered with the hard magnetic material coating layer, and the back surface of the adjacent folding surface of the wrinkle fabric is covered with the soft magnetic material coating layer; the folding surfaces are covered in sequence. The cloth material has the benefits that 1, the cloth material is folded in order according to folding traces under the suction force between magnetic coating layers with alternate positive and back surfaces, and 2, the magnetic coating layers with the alternate positive and back surfaces can be effectively prevented from falling off, so that the service life of the cloth material is effectively prolonged.

The invention discloses an electromagnetic shielding material, application and a manufacturing process for the electromagnetic shielding material. The electromagnetic shielding material comprises at least one magnetic-conducting metal layer, wherein the first surfaces of the magnetic-conducting metal layers are electrochemically treated to form plated layers, and are obtained by transverse magnetic field thermal treatment. Furthermore, magnetic-conducting coatings can be coated on the second surfaces of the magnetic-conducting metal layers. The magnetic-conducting coatings are coated on the magnetic-conducting metal layers to form a composite structure capable of effectively improving magnetic conductivity within a frequency range of 30MHz to 10GHz, so that a shielding effect is improved. In addition, the magnetic-conducting metal layers can be subjected to the transverse magnetic field thermal treatment, and the magnetic conductivity of the obtained electromagnetic shielding material within 2GHz or a frequency range of 10KHz to 30MHz can be effectively improved.

The invention discloses a double-coating magnetic liquid sealing device. The sealing device comprises a shell, a rotating shaft, a first pole shoe, a second pole shoe and a first permanent magnet, wherein a shaft chamber is formed in the shell; the rotating shaft is rotationally arranged in the shaft chamber; a first non-magnetic coating is arranged on the outer circumferential surface of the rotating shaft; the first pole shoe and the second pole shoe are arranged on the rotating shaft in a sleeving mode and are arranged at intervals in the axial direction of the rotating shaft; second non-magnetic coatings are arranged on the inner circumferential surface of the first pole shoe and the inner circumferential surface of the second pole shoe; the first permanent magnet is arranged on the rotating shaft in a sleeving mode; the first permanent magnet is located between the first pole shoe and the second pole shoe; a first liquid cavity is formed among the first pole shoe, the second poleshoe, the first permanent magnet and the first non-magnetic coating; and the first liquid cavity is used for storing magnetic liquid. According to the double-coating magnetic liquid sealing device, the machining difficulty and cost are reduced, the magnetic liquid can be supplemented in time, the pressure resistance of the magnetic liquid sealing is maintained, the magnetic liquid further has a lubricating effect, and the torsion moment of the magnetic liquid sealing is reduced.

Improved saw guide block and fluid for a multiple blade saw assembly. Individual guide blocks are disposed between adjacent saw blades, which blades are mounted on a common drive shaft and axially spaced. Each of the guide blocks has a pair of oppositely-directed block pads that create a magnetically-padded bearing surface. Each block pad includes magnetic portions and non magnetic portions. Each non magnetic portion has fluid delivery ports to allow the transport of ferromagnetic, lubricant, coolant, coating fluid to the magnetically-padded bearing surfaces. The magnetic portion forms a magnetic field of attraction in its vicinity for capture and adherence of ferromagnetic particles within the fluid, whereby a magnetic coating on the guide block bearings surfaces is continuously regenerated during operation of the saw assembly.

The invention provides a portable magnetic-therapy mattress which comprises an upper fabric layer (1), a magnetic conducting layer (2), a matrix layer (3), a magnetic coating (4), an inner cushion layer (5) and a lower fabric layer (6) in sequence from top to bottom. The lower face of the surface layer of the mattress is coated with magnetic coating instead of embedding magnets in the mattress. Firstly, the weight of the mattress is reduced to a large extent by omitting the magnets, and it can still be guaranteed that a magnetic field with enough magnetic field intensity and space coverage is generated; secondly, due to the fact that strip-shaped and blocky magnets are not adopted, a too thick cushion layer does not need to be additionally arranged to meet human body comfort, the weight of the mattress is further reduced, and the space is saved; finally, the mattress can be freely folded. The portability of the mattress is fully improved on the premise of guaranteeing the magnetic therapy effect.

An electromagnetic induction device, comprising a magnetic coating (110) and at least one set of coils (120). The magnetic coating (110) is formed by splicing all magnetic cells together, and is provided therein with at least one cavity. Magnetic division surfaces (AA) between each two magnetic cells are substantially arranged along a magnetic flux loop without cutting off the magnetic flux loop. The coils (120) are placed in a cavity formed by the magnetic coating (110), and the magnetic flux loop in the magnetic coating (110) is formed by the coils (120) after being energized. The overall structure of the magnetic coating (110) comprises at least two magnetically permeable layers (110′, 110″). The electromagnetic induction device, on the one hand, can be substantially closed to reduce leakage flux; on the other hand, since there is no air gap on a magnetic unit, the magnetic reluctance is effectively reduced. In addition, the magnetic coating (110) is of a layered structure so that the electromagnetic induction device can be fabricated in a superposed manner, thereby not only reducing the manufacturing difficulty, but also facilitating obtaining a high-performance flat electromagnetic induction device. Also provided is a corresponding method for manufacturing the electromagnetic induction device.

The invention discloses a heating device and a heating method thereof. The heating device comprises a shell (1), a manipulator (2) used for clamping and pushing rivets, and an electromagnetic heating device (3) used for heating the rivets. A heating cavity is formed in the front end of the shell (1), and the manipulator (2) is arranged in the shell (1). The heating device further comprises a positioning seat (6), the positioning seat (6) is made of magnetic materials, or the surface of the positioning seat is coated with a magnetic coating. A positioning hole (6.1) used for positioning and guiding the rivet position is formed in the positioning seat (6). A feeding window (1.2) by which the rivets can be conveniently put in is arranged in the position, near the heating cavity (1.1), of the shell (1), and a turning cover (1.3) is arranged on the feeding window (1.2). According to the heating device and method, the manipulator is used for clamping and shooting the rivets, and the rivets are positioned during riveting, so that the riveting accuracy is improved.

The invention discloses a method for producing a resin diamond wire by controlling exposure heights of diamond abrasives through the effect of magnetic force. The method comprises the following steps of (1) mixture preparation: evenly mixing the diamond abrasives in a surface magnetic coating, resin and additives according to a certain process proportion; (2) coating: injecting the prepared mixture into a coating mould, and enabling the mixture to be coated on the surface of a steel wire when the steel wire passes through the coating mould; (3) exposure height adjustment: enabling the steel wire subjected to the coating to enter a uniform magnetic field with adjustable magnetic field intensity, and controlling the ratio of the exposure heights to be 0.4-0.6, wherein a diamond with the surface magnetic coating performs displacement in a resin carcass under the effect of magnetic field force in the magnetic field; and (4) enabling the steel wire subjected to the step (3) to be cured and formed in a curing oven. By means of the method for producing the resin diamond wire, good cutting efficiency and long service life of the diamond wire are ensured to the largest extent.

The invention discloses a micro-arc oxidation preparation method of a magnetic TiO2 bioactive coating. In an air environment, an electrolytic solution containing calcium salt, phosphor salt and molysite is taken, a pH value of the electrolytic solution is adjusted to be 5.0-5.3, titanium or a titanium alloy is taken as an anode, stainless steel is taken as a cathode, and titanium or the titanium alloy is subjected to micro-arc oxidation treatment for 1-8min by adopting a pulsed power supply, with the temperature of the electrolytic solution being kept at 5-25 DEG C, thus the magnetic TiO2 bioactive coating is generated on a surface layer of titanium or the titanium alloy. The magnetic TiO2 coating having magnetism (Ms being 0.2696-1.101emu/g) and good bioactivity can be prepared with the adoption of the micro-arc oxidation preparation method.

Disclosed in the invention is a key structure comprising a base plate, a switch circuit board, a key cap, and a frame. The key cap has a magnetic element arranged at the edge of the key cap. The frame has a magnetic coating layer arranged at the frame edge and is below the magnetic element. When the key cap is touched and pressed, the key cap moves and the switch circuit board is triggered to generate a key signal. When the key cap is not touched and pressed, the key cap moves towards the magnetic element based on the magnetic force generated by the magnetic element. Therefore, the key structure can be operated normally without the need of elastic rubber.

The invention relates to a magnetic force microscopy probe with a low magnetic moment and a high coercive force and a manufacturing method thereof; the manufacturing method comprises the following steps of: cleaning a Si probe; fixing the cleaned Si probe in a sample chamber of a magnetic control sputtering device, vacuumizing the sample chamber, and then feeding a high-purity inert gas to lead the gas pressure in the sample chamber to be maintained at 0.1-0.5 pascal; sputtering a CoPt magnetic alloy on the surface of the Si probe in a magnetic control sputtering manner, thereby obtaining the Si probe with a magnetic coating; and heating the obtained Si probe with the magnetic coating in a vacuum condition to be 500 DEG C-750 DEG C, and carrying thermal treatment for 15-180 minutes so that the magnetic alloy is converted into the L10-CoPt alloy, thereby obtaining the magnetic force microscopy probe with the low magnetic moment and the high coercive force.

The invention discloses magnetic anti-counterfeiting aluminum-foil paper, which comprises base paper and an aluminum-foil layer, wherein the surface of the aluminum-foil layer is coated with a layer of magnetic coating with a thickness of 10 to 40 microns; the coating is prepared from the following raw materials in percentage by mass: 15 to 25 percent of polyurethane resin, 5 to 10 percent of magnetic nano silica, 50 to 70 percent of organic solvent, 0.3 to 0.5 percent of aluminum oxide, 0.5 to 1 percent of dispersant, 0.1 to 0.5 percent of coupling agent, 0.5 to 1.5 percent of lubricant, 0.5 to 1 percent of antistatic agent and 2 to 5 percent of toluene diisocyanate. According to the magnetic anti-counterfeiting aluminum-foil paper, the surface of the aluminum-foil paper is coated with a layer of magnetic material; the part into which magnetic powder is added is different from other aluminum-foil paper in hand feeling, and particularly can be identified through a magnetic metal identifier or a magnetic induction device, so as to achieve an anti-counterfeiting purpose.

A low-profile large current inductor includes an iron core having an expanded upper part, an expanded lower part, a core shank connected between the expanded upper part and the expanded lower part, two wire-mounting grooves extending across the bottom wall of the expanded lower part in a parallel manner and four arched notches respectively located on the expanded lower part at each of two distal ends of each of the two wire-mounting grooves, a winding wound round the core shank of the iron core with two end portions thereof respectively extended through the arched notches into the wire-mounting grooves, two flat electrodes respectively attached to the wire-mounting grooves and respectively connected with the end portions of the winding, and a magnetic coating surrounding the winding. The iron core has full round fillets in corner areas thereof for the passing of the two opposite end portions of the winding.