摘要:
The invention provides a method for preparing a soft magnetic material which meets demands for low iron loss, high density, high strength and high productivity. The method comprises a surface oxidation step of forming oxide films on the surfaces of a soft magnetic powder, a step of preparing a molding compound of the soft magnetic powder by mixing a soft magnetic powder and a binder with a predetermined blending ratio, a press molding step of press-molding the molding compound of the soft magnetic powder into a predetermined shape, and a sintering step of sintering the press-molded soft magnetic powder to produce a soft magnetic material, wherein a millimeter wave sintering apparatus or a discharge plasma sintering apparatus is used as a heating means in the surface oxidation step or in the sintering step. Thereby, energy of millimeter waves or discharge plasma acts locally on oxidized surface portions having a large electric resistance of the soft magnetic powder, the surfaces of the soft magnetic powder are locally heated at a temperature near the melting point, and oxidation of the surfaces of the soft magnetic powder (formation of an oxide film) and sintering (diffusional joining between oxide films) are promoted.
摘要:
A first core is formed by stacking a plurality of magnetic plates of a soft magnetic material, such as iron, in a direction perpendicular to a plane of each magnetic plate. A bonding thin layer made of iron oxide having a thickness of approximately a few nanometers to a few hundred micrometers is formed between adjacent ones of the magnetic plates. The adjacent magnetic plates are bonded to each other by diffusion bonding in such a manner that the bonding thin layer is interposed between the adjacent magnetic plates to electrically insulate between the adjacent magnetic plate.
摘要:
A thermoelectric module 2 constituting an exhaust heat recovery system has p-type semiconductors 3p and n-type semiconductors 3n which both constitute thermoelements 3 for converting a difference in temperature between high temperature side end portions 21 and low temperature side end portions 22 into electricity. The thermoelectric module 2 is constructed such that the n-type semiconductors 3n and the p-type semiconductors 3p are stacked alternately along a longitudinal direction of an exhaust pipe portion 20 with heat insulating support portions 41, 42 being interposed therebetween, and the n-type semiconductors 3n and the p-type semiconductors 3p are electrically connected to each other via electrode members at the high temperature side end portions 21 and the low temperature side end portions 22.
摘要:
The invention provides a method for manufacturing a soft magnetic material, wherein an Fe—Si alloy powder is heated in a weakly oxidizing atmosphere to form a SiO2 oxide film on the surface, and the powder is then press-molded and fired in a weakly oxidizing atmosphere to obtain a sintered product. By performing the surface oxidizing step in a weakly oxidizing atmosphere such as water vapor, Si is selectively oxidized to form a thin oxide film with high electrical resistance. Furthermore, by firing the molded product in a weakly oxidizing atmosphere, the sintering can be performed while the oxide film, in which cracks and the like are generated at the press-molding, is repaired.
摘要:
The invention provides a method for manufacturing a soft magnetic powder material covered by oxide layers at surfaces of the powder, by using a soft magnetic alloy powder containing a soft magnetic powder material and a second element such as Si having an oxidizing reactivity higher than iron, and heating the soft magnetic alloy powder in an atmosphere of a weak oxidizing gas by mixing a weak oxidizing gas in an inert gas, and oxidizing selectively the second element at surface layers of the powder while restraining an oxidation of iron to form thin oxide layers with high electrical resistance.
摘要:
The invention provides a method for manufacturing a soft magnetic powder material covered by oxide layers at surfaces of the powder, by using a soft magnetic alloy powder containing a soft magnetic powder material and a second element such as Si having an oxidizing reactivity higher than iron, and heating the soft magnetic alloy powder in an atmosphere of a weak oxidizing gas by mixing a weak oxidizing gas in an inert gas, and oxidizing selectively the second element at surface layers of the powder while restraining an oxidation of iron to form thin oxide layers with high electrical resistance.
摘要:
A battery pack includes: a plastic-made, elongated outer casing composed of interconnected peripheral walls to define an interior battery storage portion; and a battery accommodated in the battery storage portion inside the outer casing. The outer casing has a mounting protrusion to be attached to and project outwardly from an electronic equipment casing. An inner casing is incorporated inside the outer casing of the battery pack. The battery pack is constructed and arranged so that an outer battery, located outside the electronic equipment, is accommodated inside the inner casing.
摘要:
An exhaust emission control device has an additive valve and a control unit to decrease nitrogen oxides contained in an exhaust gas by means of a reducing agent. The control unit sets a valve opening period of time and a valve closing period of time alternately elapsing in a repetition cycle. The control unit controls the valve to discharge the agent into the exhaust gas during each valve opening period and to stop discharging the agent during each valve closing period. The control unit sets the valve opening period to be shortened as a flow rate of the exhaust gas is lowered, so that a penetration force of the reducing agent is appropriately set. The control unit sets the repetition cycle at a value depending on the flow rate of the nitrogen oxides to sufficiently deoxidize the nitrogen oxides by means of the agent.
摘要:
A fuel supply apparatus includes a component adjustment unit, a low-pressure side passage, and a valve. The unit adjusts component composition of fuel by separating a particular component from fuel. The unit includes a component separation wall, which divides an interior of a portion of a fuel supply passage between an anterior chamber and a posterior chamber. The wall includes a separation membrane, which the particular component of fuel in the anterior chamber selectively permeates to be separated. The particular component after passing through the wall is temporarily stored in the posterior chamber. When the low-pressure side passage connected to the posterior chamber is opened by the valve, the particular component is separated. Fuel, from which the particular component is separated, is supplied to an injection valve from the anterior chamber. When the low-pressure side passage is closed by the valve, the separation of the particular component is restricted.
摘要:
The present invention has an object to provide a photoelectric conversion device which can be manufactured through a simple manufacturing process, achieve photoelectric conversion over a wide range of wavelength regions, and attain high photoelectric conversion efficiency even in the infrared wavelength region, a photodetection device, and a photodetection method. This photoelectric conversion device 1 includes a substrate 2 containing single crystalline titanium dioxide, adhesion layers 2c formed on a surface 2a of the substrate 2, metal microstructure bodies 3, each of which has a volume of 1,000 nm3 or more and 3,000,000 nm3 or less, arranged at predetermined intervals in a predetermined direction on surfaces of the adhesion layers 2c, a container 4 for containing an electrolyte solution L in an arrangement region of the metal microstructure bodies 3 on the surface 2a of the substrate 2, a conductive layer 7 formed on a rear surface 2b of the substrate 2, and a counter electrode 5 in contact with the electrolyte solution L in the container 4; and the metal microstructure bodies 3 adhere onto the substrate 2 through the adhesion layers 2c, a Schottky barrier is formed at an interface of the substrate 2 with the metal microstructure bodies 3, and photoelectric conversion is carried out for light in an infrared region by utilizing a plasmon resonance phenomenon.