78results about How to "Efficient diffusion" patented technology

Provided is a method for producing an R-T-B-based sintered magnet by diffusing an heavy rare earth element RH from the surface of an R-T-B-based sintered magnet body into the inside of the sintered magnet body with high efficiency. This method for producing an R-T-B-based sintered magnet comprises: a step of preparing an R-T-B-based sintered magnet body (wherein R represents a rare earth element; and T represents a transition metal element mainly comprising Fe); a step of preparing an RH diffusion source that is an alloy comprising 0.2 to 18 mass% inclusive of a light rare earth element RL (which comprises Nd and / or Pr), 40 to 70 mass% inclusive of Fe and a reminder made up by a heavy rare earth element RH (which comprises Dy and / or Tb) wherein the ratio of the heavy rare earth element RH to Fe (i.e., RH:Fe) is 3:2 to 3:7 by mass; and an RH diffusion step of introducing the R-T-B-based sintered magnet body and the RH diffusion source into a treatment chamber in a relatively movable and approachable or contactable manner to each other and heating the R-T-B-based sintered magnet body and the RH diffusion source at a temperature of 700 to 1000ºC inclusive while moving the R-T-B-based sintered magnet body and the RH diffusion source in the treatment chamber continuously or intermittently.

The invention provides a recording element substrate, a method of manufacturing the recording element substrate, and a liquid ejection head. The recording element substrate includes a substrate; an insulating layer disposed on the substrate; a plurality of heating portions which are arranged on the insulating layer and which produce thermal energy used to eject a liquid; and a plurality of heat conduction members, each being located between adjacent heating portions with respect to an arrangement direction of the heating portions, the heat conduction members being located between the substrate side principal surface of the insulating layer and the heating portion side principal surface of the insulating layer and having higher thermal conductivity than the insulating layer. The heat conduction members are in contact with a heat conduction layer which has higher thermal conductivity than the insulating layer.

The invention discloses a negative ion healthy LED lamp, which belongs to the field of LED lighting fixtures. The present invention comprises LED part and purifier part, and the output end of transformer I is connected with the input end of rectifier bridge group, and the output end of rectifier bridge group is connected with LED part, purifier part respectively; Purifier part comprises electrolytic capacitor II, transformer II , diode I, capacitor II, resistor V, regulator, capacitor I, fan, time-delay switch, triode and negative ion generating mechanism, etc. The negative ion generating mechanism includes diode II, resistor VI and discharge needle. A negative ion healthy LED lamp of the present invention has clever circuit structure design, relatively simple circuit structure, and low manufacturing cost; wherein: the LED part and the purifier part share a rectifier bridge group, which reduces the use of components and reduces the manufacturing cost .

The invention provides a preparation method of polyimide foam plastic. The method comprises the steps as follows: firstly, after dianhydride is mixed with low-level aliphatic alcohol, an esterification reaction is performed, and a diacid diester solution is obtained; then the obtained diacid diester solution is mixed with polymerized monomer amine and polyamic acid powder to obtain a mixed solution; and finally, the obtained mixed solution is sequentially subjected to foaming and thermal imidization after concentration to obtain the polyimide foam plastic. The invention further provides the polyimide foam plastic and the preparation method thereof, and the method comprises the step that polyamic acid powder is added when dianhydride and isocyanate are used for preparing the polyimide foam plastic. According to the invention, the polyamide acid powder serves as a nucleating agent, so that a cell of an objected formed by foaming of polyimide is fine and smooth, that is, the size distribution of the cell is improved, the cell uniformity is better, then the flexibility performance and the like of the polyimide foam plastic are improved; meanwhile, the heat resistance is not influenced; and besides, the preparation method of the polyimide foam plastic is concise in processing, and low in energy consumption and production cost.

The invention provides an air cleaner with high commercial value which is combined organically with an electrolytic mist generator. The electrolytic mist generator 30 is incorporated within the air cleaner 1. The electrolytic mist generator 30 comprises a tray 33 for storing water, a pair of electrodes 41 to electrolyze the water in the tray 33, a structure for guiding the water in the tray 33 to a vibration applying chamber 46 and for generating mist using an ultrasonic vibrator 50, a dome 56 to be filled with the generated mist, and a mist drifting chamber 60 for making the mist to drift within itself. The mist drifting within the drifting chamber 60 is diffused outside using air cleaned by the air cleaner.

The present invention provides a solid polymer electrolyte fuel cell and manufacturing method thereof. An intermediate layer is disposed between respective gas diffusing layers and catalyst layers of a polymer electrolyte fuel cell. This intermediate layer is mainly an electron-conductive filler and a binder, and has voids that are continuous in a thickness direction inside the intermediate layer, the intermediate layer has a solid volume percentage that is at least 3 percent and no larger than 30 percent, and a volume ratio occupied by voids that have a void diameter that is at least 1 mum and no larger than 30 mum of at least 50 percent of overall intermediate layer volume.

The invention discloses an automatic liquid nitrogen fire-extinguishing and explosion-suppressing system for an oil tank region. The automatic liquid nitrogen fire-extinguishing and explosion-suppressing system comprises a liquid nitrogen storage station, a low-temperature liquid nitrogen booster pump and a monitoring-jetting integrated box, wherein the monitoring-jetting integrated box comprises a housing, a glass ball expansive type constant-temperature fire detector with a glass ball fracture free surface, an expanding cavity and a horn-shaped outlet; the glass ball expansive type constant-temperature fire detector, the expanding cavity and the horn-shaped outlet define a low-temperature nitrogen gas cavity; the top of the liquid nitrogen storage station is connected with a self-lifting buffer tank through a gas exhaust interface; the self-lifting buffer tank communicates with the low-temperature nitrogen gas cavity through a housing upper interface; the low-temperature liquid nitrogen booster pump is connected with an inlet of a low-temperature ball valve; an outlet of the low-temperature ball valve is connected with the glass ball fracture free surface through a rear section of a gas storage tube; a connecting line is arranged on the rear section of the gas storage tube; a pressure feedback device, a fire-fighting linkage controller and an alarm are sequentially connected on the connecting line; and the alarm is connected with a control end of the low-temperature ball valve. The system can solve the fire efficient response problem, the liquid nitrogen effective conveying problem, the liquid nitrogen efficient atomizing problem and the liquid nitrogen diffusing problem, so that the purpose of automatically and efficiently suppressing explosion and extinguishing fire in an oil tank is achieved.