31 results about "Diamagnetism" patented technology

The present application relates to a kind of for the radiation protection detection in nuclear magnetic machine room, including: shielding sleeve box, by diamagnetic material is made, for shielding external static magnetic field, its internal cavity shape is adapted according to the shape of the used patrol instrument;Ray detection mesh, set up on shielding sleeve box corresponding to the position of patrol instrument probe, by diamagnetic material is made, allow X or gamma ray to penetrate;Instrument data reading mesh, set up on shielding sleeve box corresponding to the position of patrol instrument display screen, by diamagnetic material is made, allow detection personnel to read data directly visually;The import and export of instrument that can be closed, be set on shielding sleeve box, and be equipped with the sealing cover made of diamagnetic material, for the input and output of patrol instrument, the sealing cover is in closed state when detecting.The present application solves the phenomenon that the radiation diagnosis and treatment machine room adjacent place is the radiation protection detection difficult to implement for nuclear magnetic resonance machine room.

Disclosed herein is an apparatus for separation of diamagnetic particles of sub-micron diameter from a fluid. The disclosed apparatus includes a first magnetic coil including a hollow center and a separation unit including an outer enclosure and a second magnetic coil. The second magnetic coil includes a single-layer of windings of a magnetic wire and at least one nonmagnetic wire on a nonmagnetic core where the first magnetic coil houses the separation unit in the hollow inner center. Also disclosed herein is a method of using the apparatus.

This invention belongs to the field of passive drive technology and relates to a three-dimensional passive drive system based on magnetic climbing effect and magnetic synchronous belt, including a working unit, a magnetic attraction unit, a load-moving unit, and a control unit. This invention achieves periodic magnetic coupling between the alternating first ferromagnetic strip and the first non-magnetic strip or the first diamagnetic strip on the drive rod and the permanent magnet synchronous belt on the outside of the cylinder. Only a single drive component is needed to efficiently convert rotational motion into step-like rotation of the magnetic synchronous belt, thereby driving the ferromagnetic rod adsorbed on its surface to move the load stage precisely and controllably horizontally and vertically within the sealed enclosure. Simultaneously, the adsorption switching direction of the ferromagnetic rod is controlled by top electromagnetic assistance, achieving three-dimensional passive precision drive without contact or through holes. This not only significantly simplifies structural complexity, reduces manufacturing costs and space occupation, but also greatly reduces energy consumption and enables the system to maintain positional stability through magnetic adsorption when static.

A kind of abrasive particle multi-parameter on-line monitoring device and method, belong to mechanical equipment wear monitoring technical field, including inductance monitoring module, imaging monitoring module, paramagnetic magnetophoresis separation device, collection cleaning device, system processor.Inductance monitoring module detects the magnetic field disturbance generated when abrasive particle passes, obtains the size, number and ferromagnetic property of abrasive particle, is transmitted to system processor;Imaging monitoring module is triggered according to the inductance pulse signal of inductance monitoring module by system processor, and the shape and size information of abrasive particle are obtained by imaging abrasive particle;Paramagnetic magnetophoresis separation device is used to separate paramagnetic and diamagnetic abrasive particle, and is connected with collection cleaning device.The present application can obtain the information of multiple abrasive particles simultaneously, has the advantages of anti-bubble interference, high response sensitivity, can distinguish paramagnetic and diamagnetic, can multiple information authentication, etc.;The specific occurrence site of mechanical fault and its severity, wear mechanism can be analyzed and confirmed, to ensure that equipment is safe and efficient operation.

The invention discloses a rotor suspension driving structure and method and a motor, and belongs to the technical field of magnetic suspension drive.The rotor suspension driving structure comprises a rotor suspension assembly and a rotor rotation driving assembly which are arranged on the two radial sides of a rotor, and working air gaps are formed between the rotor suspension assembly and the rotor rotation driving assembly and the rotor; the rotor is made of diamagnetic materials, the rotor suspension assembly below the rotor adopts a permanent magnet array and can be arranged in an Opposite or Halbach mode, passive and stable suspension support is provided for the rotor through magnetic repulsive force, the ratio of the suspension force to the gravity of the rotor is increased along with reduction of the scale, the miniature design of the bearing can be achieved, meanwhile, extra space is not occupied, and the bearing is more compact in structure and more compact in structure. And the size requirement of the motor can be further reduced.

The invention discloses an abrasive particle multi-parameter online monitoring device and method, and belongs to the technical field of mechanical equipment wear monitoring, and the abrasive particle multi-parameter online monitoring device comprises an inductance monitoring module, an imaging monitoring module, a parametric diamagnetic magnetophoresis separation device, a collecting and cleaning device and a system processor. The inductance monitoring module detects magnetic field disturbance generated when the abrasive particles pass through, obtains the sizes, the number and the ferromagnetic properties of the abrasive particles and transmits the sizes, the number and the ferromagnetic properties to the system processor; the imaging monitoring module is triggered by the system processor according to the inductance pulse signal of the inductance monitoring module to image the abrasive particles and obtain the shape and size information of the abrasive particles; and the paramagnetic and diamagnetic magnetophoresis separation device is used for separating paramagnetic and diamagnetic abrasive particles and is connected with the collecting and cleaning device. According to the invention, information of a plurality of abrasive particles can be obtained at the same time, and the method has the advantages of bubble interference resistance, high response sensitivity, capability of distinguishing paramagnetism, capability of multi-information verification and the like; the method can analyze and confirm the specific occurrence part, the severity and the abrasion mechanism of the mechanical fault, and guarantees the safe and efficient operation of the equipment.

A transmission line structure and a fabricating method of the same are provided. The transmission line structure includes a dielectric layer, a magnet member and a diamagnetism transmission line. The dielectric layer has a transmission cavity. The transmission cavity has an inner wall. The magnet member is disposed in the transmission cavity and is fixed to the inner wall. The magnet member generates a magnetic field. The diamagnetism transmission line can repel the magnetic field to be levitated in the transmission cavity.

Embodiments provided herein include rotatable magnets (e.g., spherical dipole magnets) disposed within sets of coils that can be used to operate the magnets as reaction / momentum “spheres” and / or as control moment gyroscopes. The coils are able to exert three-dimensional torques onto the magnet in order to effect attitude control of a satellite or other system. The coils can also optionally exert translational forces onto the magnet in order to maintain the magnet in position and avoid contact with static components. Diamagnetic materials can also be included to provide stabilizing repulsive magnetic forces to maintain the magnet in position and / or to reduce the necessary performance of the coils with respect to applying stabilizing translational forces.

The demonstration device for the magnetic susceptibility difference of different fluid substances in the magnetic field comprises a support, a container supporting disc, a magnet disc, a powerful magnet, a supporting rod, an equipment support, a glass container and video recording equipment, the container supporting disc is installed on the upper portion of the support, and the glass container is arranged on the container supporting disc. Multiple layers of magnet disc height adjusting supporting blocks are symmetrically arranged on the two sides of the lower portion of the support respectively, the magnet disc is erected on the two magnet disc height adjusting supporting blocks of any layer height, the powerful magnet is located below the glass container and installed on the magnet disc, and the bottom of the supporting rod is installed on one side of the support. One end of the device support is in threaded connection with the top of the supporting rod through a bolt and nut assembly I. The video recording device is installed at the other end of the device support. According to the utility model, the paramagnetism and diamagnetism phenomena of different fluid substances can be effectively detected and analyzed, and a simple, visual and accurate means is provided for the research of the magnetic characteristics of the fluid substances.

The present invention provides an electrolytic cell suitable for electrolysing certain inorganic compounds of alkali and alkaline earth (Group 1 and Group 2) metals in their molten state. The cell (100) comprises a vessel (102) for containing a molten electrolyte, an anode (10) and a cathode (70) both inside the vessel (102), and a source (20) of a magnetic field having a gradient with a positive component in a direction (– x) from the anode (10) to the cathode (70), such that the strength of the magnetic field increases from the anode (10) to the cathode (70). The rest of the electrolytic cell (100), apart from the source of the magnetic field, including at least both the vessel (102) and the anode (10), consists of material having a magnetic susceptibility with an absolute value of less than 10-2. Thus the rest of the electrolytic cell, which is made of diamagnetic and / or paramagnetic material(s), does not affect the magnetic field between the anode (10) and the cathode (70) to any appreciable extent in comparison to the same magnetic field in free space. The source of the magnetic field between the anode (10) and the cathode (70) may either be a permanent magnet (20) located outside the vessel (102) adjacent to the cathode (70), or it may be provided by permanently magnetizing the cathode (70) itself. In the latter case, the cathode comprises an electrically conducting "hard" ferromagnetic material with a high Curie temperature. In the former case, the cathode instead consists of an electrically conducting material also having a magnetic susceptibility with an absolute value of less than 10-2, so as not to affect the magnetic field from the permanent magnet (20) located outside the vessel (102). In either case, if such a cell (100) is used to electrolyse a halide of an alkali metal, a halide of an alkaline earth metal except beryllium or a hydroxide of an alkali metal in their molten state, the magnetic field between the anode (10) and the cathode (70) inhibits a back-reaction between the electrolysis products formed at the anode (10) and cathode (70), thereby improving the energy efficiency of the cell. A plurality of such cells (100) may also be arranged with just one permanent magnet (20) as the source of the magnetic field between the anode (10) and cathode (70) inside the respective vessels (102) of two adjacent electrolytic cells (100), thereby halving the total number of magnetized components which are used. [Fig. 4A]

Disclosed herein is an apparatus for separation of diamagnetic particles of sub-micron diameter from a fluid. The disclosed apparatus includes a first magnetic coil including a hollow center and a separation unit including an outer enclosure and a second magnetic coil. The second magnetic coil includes a single-layer of windings of a magnetic wire and at least one nonmagnetic wire on a nonmagnetic core where the first magnetic coil houses the separation unit in the hollow inner center. Also disclosed herein is a method of using the apparatus.

To provide a composition for a bonded magnet capable of obtaining a bonded magnet having a good appearance even when molded at a relatively low temperature, and to provide a bonded magnet having a sufficient residual magnetic flux density (Br) and a good appearance.SOLUTION: The present invention relates to a composition for a bonded magnet containing rare earth magnetic powder, a polyarylene sulfide resin, and paramagnetic or diamagnetic inorganic particles containing at least one metal element selected from the group consisting of zinc, copper, and manganese, and a bonded magnet obtained from the composition for a bonded magnet.SELECTED DRAWING: Figure 1

The invention provides a transmission line structure and a manufacturing method thereof. The transmission line structure includes a dielectric layer, a magnetic member, and a diamagnetic transmission line. The dielectric layer has a transmission cavity. The transmission cavity has an inner wall surface. The magnetic part is arranged in the transmission cavity and fixed to the inner wall face. The magnetic member generates a magnetic field. The diamagnetic transmission line is configured to repel the magnetic field and suspend within the transmission cavity. When the diamagnetic transmission line is suspended in the transmission cavity, the diamagnetic transmission line is equivalently wrapped by air, so that the dielectric loss and dielectric constant of the transmission line structure are quite low, and the transmission line structure is suitable for transmitting high-speed and high-frequency signals.

The present invention provides an electrolytic cell suitable for electrolysing certain inorganic compounds of alkali and alkaline earth (Group 1 and Group 2) metals in their molten state. The cell (100) comprises a vessel (102) for containing a molten electrolyte, an anode (10) and a cathode (70) both inside the vessel (102), and a source (20) of a magnetic field having a gradient with a positive component in a direction (– x) from the anode (10) to the cathode (70), such that the strength of the magnetic field increases from the anode (10) to the cathode (70). The rest of the electrolytic cell (100), apart from the source of the magnetic field, including at least both the vessel (102) and the anode (10), consists of material having a magnetic susceptibility with an absolute value of less than 10-2. Thus the rest of the electrolytic cell, which is made of diamagnetic and / or paramagnetic material(s), does not affect the magnetic field between the anode (10) and the cathode (70) to any appreciable extent in comparison to the same magnetic field in free space. The source of the magnetic field between the anode (10) and the cathode (70) may either be a permanent magnet (20) located outside the vessel (102) adjacent to the cathode (70), or it may be provided by permanently magnetizing the cathode (70) itself. In the latter case, the cathode comprises an electrically conducting "hard" ferromagnetic material with a high Curie temperature. In the former case, the cathode instead consists of an electrically conducting material also having a magnetic susceptibility with an absolute value of less than 10-2, so as not to affect the magnetic field from the permanent magnet (20) located outside the vessel (102). In either case, if such a cell (100) is used to electrolyse a halide of an alkali metal, a halide of an alkaline earth metal except beryllium or a hydroxide of an alkali metal in their molten state, the magnetic field between the anode (10) and the cathode (70) inhibits a back-reaction between the electrolysis products formed at the anode (10) and cathode (70), thereby improving the energy efficiency of the cell. A plurality of such cells (100) may also be arranged with just one permanent magnet (20) as the source of the magnetic field between the anode (10) and cathode (70) inside the respective vessels (102) of two adjacent electrolytic cells (100), thereby halving the total number of magnetized components which are used.

A stopper mechanism for a drain includes one of a magnetic stopper and a diamagnetic and a magnetic field generator with a fixed position in relation to the drain which produces a magnetic field having a precise combination of position, geometry, and strength to support the stopper in a stable, levitated, distal position with relation to a drain to permit fluid and waste to pass by the stopper and which does not provide any contact points for collection of debris thereon, and wherein the magnetic field can be changed to cause the magnetic stopper to engage the drain to restrict flow through the drain. The application of the electromagnetic levitation principles creates a truly “clogless” drain mechanism.

In various embodiments of the invention, a cooled-NMR probe can utilize a non-tapered sliding band capacitor which can be moved relative to the inner conducting skirt of a parent coil to adjust the inductance of the parent coil and thereby the frequency of the parent coil to allow the parent coil to detect the resonance of at a nucleus without requiring leads between the parent coil and a lock coil. The cooled-NMR probe can be provided without the disadvantages of prior art cooled-NMR probes. In an embodiment of the invention, the sliding band capacitor comprises a diamagnetic insulator with a first volume magnetic susceptibility, at least one paramagnetic metal with a second volume magnetic susceptibility and at least one diamagnetic metal with a third volume magnetic susceptibility, where the sum of the first volume magnetic susceptibility, the second volume magnetic susceptibility and the third volume magnetic susceptibility is approximately zero.

The invention discloses a room-temperature normal-pressure superconducting material and a preparation method thereof. The material is a rare earth-alkaline earth-nickel-oxygen system and has a double-layer perovskite type layered crystal structure, the chemical general formula is RE1-2AE1-2Ni2O6. 9-7.0, the optimal component is La1. 8Ca1. 2Ni2O6. 95, Tc is greater than or equal to 313K under normal pressure, zero resistance and complete diamagnetism are stably presented at-40-85 DEG C, and Jc is greater than or equal to 1 * 10 < 6 > A / cm < 2 > under 77K and 0T. The preparation method comprises the steps of precursor synthesis, material mixing and matching, pre-sintering nucleation, vacuum tube sealing sintering and precise oxygen control annealing, precise regulation and control of the oxygen content and the crystal structure of the material are achieved through vacuum tube sealing oxygen control, rapid sintering and low-temperature precise annealing, continuous equipment can be replaced to achieve kilogram-level batch preparation, the yield is larger than or equal to 85%, and the production cost is low. The device can be in butt joint with an existing high-temperature superconducting material mass production line. The invention belongs to the technical field of superconducting materials, and particularly relates to a room-temperature and normal-pressure superconducting material which is high in material environment adaptability and controllable and repeatable in preparation process and a preparation method of the room-temperature and normal-pressure superconducting material.

The present invention relates to a method and sensor assembly for non-destructively measuring the thickness of a coating layer formed on a substrate of a workpiece, wherein a first coating layer made of an electrically conductive and either diamagnetic or paramagnetic material is optionally disposed on a second coating layer made of a ferromagnetic material, the method including the steps of: (a) placing an inductance sensor head near the workpiece; (b) measuring inductance at multiple frequencies within a frequency range to obtain an inductance spectrum, and measuring inductance at a predetermined frequency that is in the lower third of the frequency range or below a lower limit of the frequency range; (c) determining a characteristic frequency from the inductance spectrum, the frequency at which the phase angle of inductance is -90°; (d) calculating the thickness of the first coating layer from the characteristic frequency; and (e) calculating the thickness of the second coating layer from the inductance at the predetermined frequency and the calculated thickness of the first coating layer.

The invention provides an electric spark machining device and method with a built-in auxiliary magnetic field, and relates to the field of electric spark machining. The method comprises the following steps: firstly, arranging a magnet module in an inner cavity of a replaceable electrode tip to obtain a replaceable built-in magnet electrode tip; then, the built-in magnet electrode tip is connected with a tool electrode to form an electrode module, and meanwhile, a diamagnetic material, a paramagnetic material or a low-magnetic-conductivity alloy material is selected to design the electrode module; secondly, the electrode module, a servo main shaft, a pulse power supply, a working medium and other modules form a complete electric spark machining device; and finally, a pulse power supply is started, charged particle flow in a discharge channel between the replaceable electrode tip and the workpiece is focused under the action of a built-in magnet, the energy density of electric spark machining is improved, and efficient machining of the workpiece is achieved.

The invention relates to the technical field of passive shimming in a magnetic resonance system, in particular to a silica gel composite material for reducing B0 field distortion induced by magnetic conductivity, a magnetic resonance earplug and a preparation method and application of the magnetic resonance earplug. The raw materials of the silica gel composite material comprise an agent A, an agent B and a diamagnetic material. When the silica gel composite material is used as an earplug, the uniformity of a magnetic field is optimized for a complex cavity area of a human ear canal part, the problem that B0 shimming of the ear canal area cannot be effectively carried out through built-in second-order shimming in an existing MRI machine is solved, and image artifacts are reduced.

The present invention provides an electrode manufacturing device (1) comprising a stretching unit (20) for stretching a first sheet portion (52) having a smaller thickness than a second sheet portion (54) in an electrode sheet (50) comprising the first sheet portion (52) and the second sheet portion (54). The stretching unit (20) comprises: a stretching roller (200) including a first portion (210) and a second portion (220) which are formed side by side in the axial direction and face the first sheet portion (52) and the second sheet portion (54), respectively; and one or more magnetic field generation units (300) that generate a magnetic field of which the intensity or direction changes over time around the stretching roller (200). The first portion (210) may include a ring-shaped first outer portion (214) which corresponds to a radially outer end portion, protrudes radially outward from the second portion (220), is made of a material including a ferromagnetic material, and is in contact with the first sheet portion (52). The second portion (220) may include a second outer portion (224) which corresponds to a radially outer end portion, is made of a material including a nonmagnetic, paramagnetic or diamagnetic material, and is in contact with or faces the second sheet portion (54).

The invention relates to the technical field of chalcogenide diamagnetic materials, in particular to a novel chalcogenide diamagnetic material and a synthesis method thereof.The chemical formula of the novel chalcogenide diamagnetic material is Ba2Re6Se11, the novel chalcogenide diamagnetic material is of a rhombohedral system structure, the space group is R-3c, the a-axis lattice constant and the b-axis lattice constant are 9.4-9.5, and the c-axis lattice constant is 33.3-33.4; during synthesis, Ba and Se are mixed according to the molar ratio of 1: 1, vacuumizing is performed under the sealed condition, inert protective gas is introduced, then heat treatment is performed to obtain a precursor BaSe, BaSe is ground and then mixed with Re and Se, tabletting is performed, high-temperature and high-pressure treatment is performed finally, and the molar ratio of Re to Se to BaSe is 6: 9: 2. Ba2Re6Se11 is synthesized for the first time through a high-temperature and high-pressure method, the Ba2Re6Se11 has a stable crystal structure, also shows diamagnetism and semiconductor characteristics at the same time, and has great application value in the fields of optical elements and semiconductor devices.

An implantable susceptometry marker (1001) for use in surgical guidance comprising one or more ferromagnetic elements (1004a, 1004b, 1004c); and at least one diamagnetic element (1003); wherein the one or more ferromagnetic elements are formed of at least one ferromagnetic material having an initial relative permeability of at least about 10,000 and a saturation induction Bs of less than about 1.5 T, and the at least one diamagnetic element is formed of at least one diamagnetic material having a bulk susceptibility of at least about −0.16×10−4; and wherein the total volume of diamagnetic material in the marker is about 100-10,000 times greater than the total volume of ferromagnetic material.

An implantable susceptometry marker (1001) for use in surgical guidance comprising one or more ferromagnetic elements (1004a, 1004b, 1004c); and at least one diamagnetic element (1003); wherein the one or more ferromagnetic elements are formed of at least one ferromagnetic material having an initial relative permeability of at least about 10,000 and a saturation induction Bs of less than about 1.5 T, and the at least one diamagnetic element is formed of at least one diamagnetic material having a bulk susceptibility of at least about −0.16×10−4; and wherein the total volume of diamagnetic material in the marker is about 100-10,000 times greater than the total volume of ferromagnetic material.

A combined electrostatic-magnetic objective lens located in a column of a device (1) having at least one charged particle beam, where the column further comprises a potential tube (16) positioned along an optical axis (18) of the column (2), wherein the lower end of the potential tube (16) comprises mechanically and electrically connected and at least partially electrically conductive segments, one or more of the segments being made of a paramagnetic or diamagnetic material and one or more segments (20) being made of a ferromagnetic material, wherein the first segment is made of a paramagnetic or diamagnetic material and each additional segment is made of a paramagnetic or diamagnetic material or a ferromagnetic material, wherein the first segment is located closer to the source (7) of electrons than the other segments.

The invention discloses a premixed stagnation flame synthesis device and method based on magnetic regulation and control. The premixed stagnation flame synthesis device comprises a jet atomization device, a combustor, a circulating water cooling base plate and a magnetic regulation and control device. The spraying atomization device atomizes the precursor solution to form aerosol, and the aerosol is preheated by a heat preservation pipeline and then conveyed to the combustor; the combustor enables aerosol, combustible gas and oxygen to be mixed and combusted to generate stagnation plane flames. The burnt synthetic product is rapidly cooled and deposited when falling on the surface of the circulating water cooling substrate, and corresponding nano-particles are obtained; the magnetic force regulation and control device is used for generating a magnetic field through current to apply magnetic field Lorentz force to gas sprayed out of the combustor and can control the orientation, the magnitude and the uniform area of the magnetic field Lorentz force. According to the method, the temperature, morphology and temperature gradient of the flame are changed by utilizing the cis / diamagnetism of different particles in a magnetic field, the motion trail and aggregation behavior of the particles in a flame flow field are influenced, and finally the nanoparticles with small particle size, no aggregation and large specific surface area are obtained.

The present invention provides a plurality (1q) of electrolytic cells suitable for electrolysing certain inorganic compounds of alkali and alkaline earth (Group 1 and Group 2) metals in their molten state. The cells (100) each comprise a vessel (102) for containing a molten electrolyte, an anode (10) and a cathode (70) both inside the vessel (102), wherein an interior of a first one of the vessels is in thermal contact with an interior of another one of the vessels via the respective vessels, and during use of the electrolytic cells, the interior of the first one of the vessels is substantially in thermal equilibrium with the interior of the other one of the vessels. Preferably, at least one of the cells further comprises a source (20) of a magnetic field having a gradient with a positive component in a direction (– x) from the anode (10) to the cathode (70), such that the strength of the magnetic field increases from the anode (10) to the cathode (70). The rest of the electrolytic cell (100), apart from the source of the magnetic field, including at least both the vessel (102) and the anode (10), consists of material having a magnetic susceptibility with an absolute value of less than 10-2. Thus the rest of the electrolytic cell, which is made of diamagnetic and / or paramagnetic material(s), does not affect the magnetic field between the anode (10) and the cathode (70) to any appreciable extent in comparison to the same magnetic field in free space. The source of the magnetic field between the anode (10) and the cathode (70) may either be a permanent magnet (20) located outside the vessel (102) adjacent to the cathode (70), or it may be provided by permanently magnetizing the cathode (70) itself. In the latter case, the cathode comprises an electrically conducting "hard" ferromagnetic material with a high Curie temperature. In the former case, the cathode instead consists of an electrically conducting material also having a magnetic susceptibility with an absolute value of less than 10-2, so as not to affect the magnetic field from the permanent magnet (20) located outside the vessel (102). In either case, if such a cell (100) is used to electrolyse a halide of an alkali metal, a halide of an alkaline earth metal except beryllium or a hydroxide of an alkali metal in their molten state, the magnetic field between the anode (10) and the cathode (70) inhibits a back-reaction between the electrolysis products formed at the anode (10) and cathode (70), thereby improving the energy efficiency of the cell. A plurality of such cells (100) may also be arranged with just one permanent magnet (20) as the source of the magnetic field between the anode (10) and cathode (70) inside the respective vessels (102) of two adjacent electrolytic cells (100), thereby halving the total number of magnetized components which are used.

The present invention provides an electrode manufacturing device (1) comprising a stretching part (20) for stretching a first sheet part (52) of an electrode sheet (50) comprising a first sheet part (52) and a second sheet part (54), the first sheet part (52) having a smaller thickness than the second sheet part (54). The stretching part (20) includes a stretching roller (200) including a first part (210) and a second part (220) formed side by side in an axial direction so as to face the first sheet part (52) and the second sheet part (54), respectively, and one or more magnetic field generating parts (230) installed therein so as to generate a magnetic field (B), the intensity or direction of which changes over time. The first part (210) may include a ring-shaped first outer part (214) which corresponds to a radially outer end portion, protrudes radially outward from the second part (220), is made of a material including a ferromagnetic material, and is in contact with the first sheet part (52). The second part (220) may be made of a material including a nonmagnetic, paramagnetic, or diamagnetic material. The first outer part (214) can be heated by an induced current (I) generated by the magnetic field (B).

The application belongs to the technical field of magnetic functional materials, and discloses a dense gadolinium-based fluorocarbonate magnetic refrigeration material and a preparation method and application thereof. The chemical formula of the gadolinium-based fluorocarbonate magnetic refrigeration material is NaGdCO3F2. The material is constructed by anti-magnetic sodium ions and fluorine ions and carbonic acid root mixed bridging ligands to form a dense gadolinium-based three-dimensional honeycomb framework structure. The specific spatial arrangement effectively suppresses the magnetic exchange interaction while maintaining high magnetic density, induces short-range magnetic correlation near 0.5K, suppresses the magnetic order temperature to 0.22K, and widens the effective refrigeration temperature range by generating a Schottky abnormal specific heat wide peak. Under 1T, 2T and 7T magnetic fields, the maximum magnetic entropy change reaches 23.1, 38.9 and 59.1 J·kg ‑1 ·K ‑1 respectively. As an excellent low-temperature magnetic refrigerant, the material has the advantages of good thermal stability, simple preparation process and low cost, and has a wide industrial application prospect in the field of adiabatic demagnetization refrigeration materials.

The invention discloses a 35kV overhead line vacuum circuit breaker pole, relates to the technical field of circuit breakers, aims to solve the technical problem that an existing compact pole cannot effectively solve the technical problem that the arc form is out of control, and comprises a pole pouring body and a vacuum arc extinguish chamber in the pole pouring body. The vacuum arc-extinguishing chamber is internally provided with a self-adaptive arc-extinguishing element, and the self-adaptive arc-extinguishing element is composed of an insulating base, a conversion unit and a separation grid group, wherein a diamagnetic element is embedded at the bottom of the separation grid group. The element has two states of folding and unfolding, and when the element is closed, the magnetic repulsive force between the diamagnetic element and the permanent magnet of the moving contact enables the separation grid group to be folded at the periphery of the static contact to form a grounding shielding structure of a uniform electric field; and during opening, the magnetic repulsive force is revoked, the conversion unit drives the separation grid group to be unfolded into an arc extinguishing array, the three-dimensional grid-shaped separation sheets and the transverse extinguishing strips strongly divide the gathered electric arc, and the longitudinal dispersion grooves promote plasma diffusion and cooling. According to the invention, external control is not needed, self-adaptive optimization of the arc form is realized, and the on-off reliability and the insulation performance are remarkably improved.