31 results about "Oersted" patented technology

A magnetically shielded conductor assembly with a conductor device and a film of nanomagnetic material located above the conductor device. The conductor device has a resistivity of from about 1 to about 2,000 micro ohm-centimeters. The film of nanomagnetic material has a thickness of from about 100 nanometers to about 10 micrometers and a magnetic shielding factor of at least about 0.5. The nanomagnetic material has a mass density of at least about 0.01 grams per cubic centimeter, a saturation magnetization of from about 1 to about 36,000 Gauss, a coercive force of from about 0.01 to about 5,000 Oersteds, a relative magnetic permeability of from about 1 to about 500,000, and an average particle size of less than about 100 nanometers.

A shielded substrate assembly that contains a magnetic shield with a layer of magnetic shielding material; the magnetic shield has a magnetic shielding factor of at least about 0.5. The magnetic shield contains nanomagnetic material nanomagnetic material with a mass density of at least about 0.01 grams per cubic centimeter, a saturation magnetization of from about 1 to about 36,000 Gauss, a coercive force of from about 0.01 to about 5,000 Oersteds, a relative magnetic permeability of from about 1 to about 500,000, and an average particle size of less than about 100 nanometers. The nanomagnetic material contains magnetic material with a coherence length of from about 0.1 to about 100 nanometers.

A shielded assembly containing a substrate and a shield. The shield contains both nanomagnetic material and a material with an electrical resistivity of from about 1 microohm-centimeter to about 1×10²⁵ microohm centimeters. The nanomagnetic material has a mass density of at least about 0.01 grams per cubic centimeter, a saturation magnetization of from about 1 to about 36,000 Gauss, a coercive force of from about 0.01 to about 5000 Oersteds, a relative magnetic permeability of from about 1 to about 500,000, and an average particle size of less than about 100 nanometers.

A magnetic core includes a tape comprising a magnetic film disposed on a substrate. The tape is arranged in a winding having a number of turns to form the magnetic core. The magnetic film comprises a magnetic material characterized by a coercivity of less than about ten Oersteds (10 Oe). A transformer includes the magnetic core, and a number of electrically conductive windings, where each of the windings extends around the magnetic core in at least one turn. An inductor includes the magnetic core, and an electrically conductive winding extending around the magnetic core in a number of turns.

A magnetic recording medium substrate has a diameter of not more than 90 mm and disposed thereon a soft magnetic film plating layer comprising an alloy that comprises at least two metals selected from the group consisting of Co, Ni and Fe. In a concentric circular direction within the substrate plane, a value of the coercive force obtained by a VSM magnetization measurement, is less than 30 oersteds, and a ratio of saturation magnetization to residual magnetization is from 50/1 to 5/1. Spike noise deterioration of signal reproduction caused by leaking magnetic fields is reduced in the soft magnetic layer.

A developing apparatus, a process cartridge and an image forming apparatus of which the image density can be maintained and the fogged image and the uneven density can be within an acceptable level even when the diameter of a developer carrying member is not more than 12 mm. The outer diameter of the developer carrying member 41 is not less than 8 mm and not more than 12 mm, and a magnetic mono-component developer 43 has a saturation magnetization of not less than 20 Am²/kg and not more than 37 Am²/kg when the magnetic field of 79.6 kA/m (1000 oersteds) is applied, the magnetization of not less than 70% and not more than 80% of the saturation magnetization when the magnetic field is lowered to 55.7 kA/m (700 oersteds), and the magnetization of not less than 50% and not more than 62% of the saturation magnetization when the magnetic field is lowered to 39.8 kA/m (500 oersteds).

A developing method is provided in which a developer is carried on a developer carrying member, a thin layer of the developer is formed thereon and a latent image on a latent image bearing member is developed with a developer. The developer is composed of magnetic toner particles containing a binder resin and a magnetic powder. The magnetic powder has a saturation magnetization of 67.0 Am²/kg to 75.0 Am²/kg in a magnetic field of 79.6 kA/m (1,000 oersteds) and has a residual magnetization of 4.5 Am²/kg or less. In the surface profile of the conductive resin coat layer of the developer carrying member, the relationship 1.00≦S/A≦1.65 is satisfied where S is a surface area of regions zoned by an area A of microscopic unevenness regions from which parts exceeding a reference plane by 0.5×r (r: weight average particle diameter (μm) of a toner used) or more have been excluded.

Embodiments of the invention relate to polycrystalline diamond ("PCD") exhibiting enhanced diamond- to-diamond bonding. In an embodiment, polycrystalline diamond compact ("PDC") includes a PCD table having a maximum thickness. At least a portion of the PCD table includes a plurality of diamond grains defining a plurality of interstitial regions. A metal-solvent catalyst occupies at least a portion of the plurality of interstitial regions. The plurality of diamond grains and the metal-solvent catalyst collectively exhibit a coercivity of about 115 Oersteds ("Oe") or more and a specific magnetic saturation of about 15 Gauss -cm3/grams ("G-cm3/g") or less. The PDC includes a substrate having an interfacial surface that is bonded to the PCD table. The interfacial surface exhibits a substantially planar topography. Other embodiments are directed to methods of forming PCD and PDCs, and various applications for such PCD and PDCs in rotary drill bits, bearing apparatuses, and wire-drawing dies.

An ferromagnetic thin film is used to provide a magnetic recording medium whose noise is low and whose S/N value is high. The ferromagnetic thin film as the magnetic film of the magnetic recording medium is such that the fluctuation field of magnetic viscosity at 25° C. at the field strength equal to remanence coercivity or coercivity is not less than 15 oersteds and the coercivity is not less than 2000 oersteds.

The invention provides a method for purification of iron ores in a deep ore body and belongs to the technical field of mining. The method includes the first step of crushing and grinding the iron ores in the deep ore body to obtain primary fine ores, the second step of adding water into the primary fine ores to make primary ore pulp, and carrying out primary magnetic separation at the magnetic field intensity ranging from 1000 oersteds to 2000 oersteds to obtain primary magnetic concentrate and primary magnetic tailings, the third step of carrying out secondary magnetic separation after the primary magnetic tailings are concentrated to obtain secondary magnetic concentrate and the secondary magnetic tailings, the fourth step of mixing the primary magnetic concentrate and secondary magnetic concentrate evenly to form mixed magnetic concentrate and then carrying out ore grinding to obtain secondary fine ores, the fifth step of adding water into the secondary fine ores to form secondary ore pulp, regulating the PH value, adding causticized starch water solution and then adding lime and RA715 to form reverse flotation feed, and the sixth step of carrying out reverse floatation roughing separation on the reverse flotation feed and carrying out reverse flotation concentration on roughing concentrate to obtain cleaner concentrate and cleaner tailings. Through the method, the recovery rate of iron is substantially increased; the method has the advantages of being low in comprehensive cost, small in environmental pollution, good in comprehensive utilization effect and the like.

The present invention discloses a method utilizing a femtosecond laser non-mask method to prepare a magnetic sensitive microstructure unit. The method comprises the following steps: (1) manufacturing a magnetic membrane in precipitation mode according to the sequence of a substrate, a buffer layer, a magnetic layer and a protective layer; and (2) using femtosecond laser as a light source, accurately controlling the position of a sample platform through a computer, conducting non-mask irradiation of the magnetic membrane to obtain the magnetic sensitive microstructure unit. Parameters of the femtosecond laser includes that single pulse energy is 5-50 mu joules, the pulse width is 90-150 femtoseconds, the wavelength is 800 nanometers, the pulse frequency is 10-100 hertzes, the movement speed of the sample table is 60-500 micrometers per minute, and an induced magnetic field of 0-500 oersteds is applied along the direction which is paralleled to or perpendicular to the membrane surface of the magnetic membrane during irradiation according to requirements. The method is simple, efficient and controllable, and is without prefabrication of masks.

The invention discloses an Oersted's experiment device for students, which comprises batteries, a small magnetic needle, a cell bracket and straight wire. The straight wire passes through circular holes on two metal plates of the cell bracket and is fixed by screws. The small magnetic needle is positioned right under of the straight wire to be parallel with the straight wire. If pinching the metal plates with hand, the students can observe magnetic phenomenon discovered by Oersted. The invention has the advantages of simple structure, convenient operation and no need of regulation, which is not easy to damage electric power and is suitable for being used in student group experiments.

The invention relates to a super-resolution membrane structure for photomagnetic hybrid recording, which is characterized in that the super-resolution membrane structure for photomagnetic hybrid recording comprises a substrate, a dielectric layer, a super-resolution mask layer, a thermal-protective layer, a magnetic recording layer and a protective layer in turn, wherein the substrate is glass; the dielectric layer, the thermal-protective layer and the protective layer are formed by SiN or SiO2; the super-resolution mask layer consists of Si(x)Ag(1-x) alloy, wherein X is more than 0 and less than 1; and magnetic recording layer is TbFeCo. The recording magnetic domain of 100 nanometers is obtained through auxiliary heating by blue light the laser wavelength of which is 406.7 nanometers and recording by an objective with a numerical aperture of 0.80 and an external magnetic field of 300 oersteds.

A soft magnetic under layer (SUL) is formed on a non-magnetic substrate by an electroless plating method. The SUL formed by plating is subjected to magnetic field heat treatment on conditions that the heat treatment temperature is 150° C. to 350° C., a magnetic field applied to the substrate has a strength of 50 oersteds (Oe) or more, and the treatment time is selected within a range of five minutes to ten hours. Through the magnetic field heat treatment, magnetic anisotropy is obtained with a difference (δH=H_d−H_c) of 5 oersteds (Oe) or more in terms of absolute value between a magnetization saturation magnetic field strength (H_d) in the in-plane radial direction of a soft magnetic film and a magnetization saturation magnetic field strength (H_c) in the in-plane circumferential direction of the soft magnetic film, and the magnetic anisotropy is symmetric with respect to the axis of the substrate.

The present invention relates to the technical field of popular science education, in particular to an Oster experimental demonstration device suitable for science popularization venues, comprising a table body and a table top arranged on the table body. A battery, an ammeter, an active wire and a switch, and several compass needles are arranged around the active wire. The present invention is an Oster experimental demonstration device suitable for science popularization venues. The switch is used to connect the circuit. The ammeter shows whether there is current passing through the circuit. The battery provides power. Learn the magnetic effect of current by observing the changes of the pointer of the compass around the active wire when the current passes or does not pass.

The invention relates to a production method of extremely fine lean magnetite. The production method is characterized by comprising the following steps that mineral aggregate with the particle size being not larger than 30mm is crushed to be 8-0mm through a high-pressure roller mill; water is added into the mineral aggregate with the particle size being 8-0 mm for size mixing till the solid mass concentration is 55%-60%, the mineral aggregate enters a wet screening machine with the screen mesh not exceeding 6 mm, the moisture of oversize return materials with the particle size larger than 6 mm is controlled to be within 8%, coarse-particle-size pre-selection tailing discarding is conducted on the mineral aggregate with the particle size smaller than 6 mm, and the magnetic field intensity is 4500 oersteds; the mineral aggregate with the particle size being smaller than or equal to 38 microns is mixed with water to form slurry; the 38-micron graded feeding mass concentration is controlled within 24.50%, and the graded product fineness P95 is equal to 38 microns; and the 25-micron graded feeding mass concentration is controlled within 20.00%, and the graded product fineness P95 is equal to 25 microns. According to the method, the ore grinding power index of the ore is greatly reduced, the ore grinding load and energy consumption are reduced, effective grading of superfine grinding narrow particle fractions is achieved, and metal loss is reduced.