Abstract: The present invention provides a producing method of a rare earth sintered magnet which is suitable as a producing method of a high performance rare earth sintered magnet which can reduce the number of steps for reusing defective molded bodies generated in a wet molding step of the rare earth sintered magnet, and which has a small content amount of oxygen. The invention also provides a slurry recycling method used for the producing method, and a slurry recycling apparatus. Each of the methods includes a crushing step of crushing, in mineral oil and/or synthetic fluid, a molded body in which slurry formed from alloy powder for a rare earth sintered magnet and mineral oil and/or synthetic fluid is wet molded in magnetic field, and recycling the crushed molded body into slurry.

Abstract: The present invention provides a producing method of R-T-B-based sintered magnets in which, the recovery chamber 40 includes inert gas introducing means 42, evacuating means 43, a carry-in port, a discharge port 40a, and a recovery container 60. The recovery step includes a carrying-in step of conveying a processing container 50 into the recovery chamber 40, a discharging step of discharging coarsely pulverized powder in the processing container 50 into the recovery chamber 40, a gas introducing step of introducing inert gas into the recovery chamber 40, and an alloy accommodating step of recovering the coarsely pulverized powder into the recovery container 60. Addition of pulverization aid is carried out in the alloy accommodating step. A remaining amount of coarsely pulverized powder in the recovery chamber 40, an oxygen-containing amount of the R-T-B-based sintered magnet is reduced, and magnetic properties are enhanced.

Abstract: In order to solve a technical problem of a temperature sensor for high temperature, in which platinum lead wires may be broken when used at a high temperature, an inner frame (8) made of ceramic is provided inside an outer frame (7) made of metal, the inner frame (8) is fixed, only at the upper end portion thereof, to the outer frame (7), and an insulating filler (9) made of a ceramic adhesive or a ceramic powder tightly filled at a high density is filled inside the inner frame (8) and a portion inside the outer frame (7) where the inner frame (8) is not present. According to this configuration, the occurrence of a break in platinum lead wires (6) can be significantly lowered compared with that of conventional examples.

Abstract: Provided are a recycle method and apparatus for effectively obtaining a recycled alloy powder which is hardly oxidized and which has substantially the same particle diameter as that of alloy powder used for forming a molded body, by using the molded body formed by press molding in manufacturing a rare earth sintered magnet.

Abstract: The present invention provides a producing method of a rare earth sintered magnet which is suitable as a producing method of a high performance rare earth sintered magnet which can reduce the number of steps for reusing defective molded bodies generated in a wet molding step of the rare earth sintered magnet, and which has a small content amount of oxygen. The invention also provides a slurry recycling method used for the producing method, and a slurry recycling apparatus. Each of the methods includes a crushing step of crushing, in mineral oil and/or synthetic fluid, a molded body in which slurry formed from alloy powder for a rare earth sintered magnet and mineral oil and/or synthetic fluid is wet molded in magnetic field, and recycling the crushed molded body into slurry.

Abstract: The present invention provides a producing method of a rare earth sintered magnet which is suitable as a producing method of a high performance rare earth sintered magnet which can reduce the number of steps for reusing defective molded bodies generated in a wet molding step of the rare earth sintered magnet, and which has a small content amount of oxygen. The invention also provides a slurry recycling method used for the producing method, and a slurry recycling apparatus. Each of the methods includes a crushing step of crushing, in mineral oil and/or synthetic fluid, a molded body in which slurry formed from alloy powder for a rare earth sintered magnet and mineral oil and/or synthetic fluid is wet molded in magnetic field, and recycling the crushed molded body into slurry.

Abstract: In order to solve a technical problem of a temperature sensor for high temperature, in which platinum lead wires may be broken when used at a high temperature, an inner frame (8) made of ceramic is provided inside an outer frame (7) made of metal, the inner frame (8) is fixed, only at the upper end portion thereof, to the outer frame (7), and an insulating filler (9) made of a ceramic adhesive or a ceramic powder tightly filled at a high density is filled inside the inner frame (8) and a portion inside the outer frame (7) where the inner frame (8) is not present. According to this configuration, the occurrence of a break in platinum lead wires (6) can be significantly lowered compared with that of conventional examples.

Abstract: Provided are a recycle method and apparatus for effectively obtaining a recycled alloy powder which is hardly oxidized and which has substantially the same particle diameter as that of alloy powder used for forming a molded body, by using the molded body formed by press molding in manufacturing a rare earth sintered magnet.

Abstract: The present invention provides a producing method of R-T-B-based sintered magnets in which, the recovery chamber 40 includes inert gas introducing means 42, evacuating means 43, a carry-in port, a discharge port 40a, and a recovery container 60. The recovery step includes a carrying-in step of conveying a processing container 50 into the recovery chamber 40, a discharging step of discharging coarsely pulverized powder in the processing container 50 into the recovery chamber 40, a gas introducing step of introducing inert gas into the recovery chamber 40, and an alloy accommodating step of recovering the coarsely pulverized powder into the recovery container 60. Addition of pulverization aid is carried out in the alloy accommodating step. A remaining amount of coarsely pulverized powder in the recovery chamber 40, an oxygen-containing amount of the R-T-B-based sintered magnet is reduced, and magnetic properties are enhanced.

Abstract: The present invention provides a producing method of a rare earth sintered magnet which is suitable as a producing method of a high performance rare earth sintered magnet which can reduce the number of steps for reusing defective molded bodies generated in a wet molding step of the rare earth sintered magnet, and which has a small content amount of oxygen. The invention also provides a slurry recycling method used for the producing method, and a slurry recycling apparatus. Each of the methods includes a crushing step of crushing, in mineral oil and/or synthetic fluid, a molded body in which slurry formed from alloy powder for a rare earth sintered magnet and mineral oil and/or synthetic fluid is wet molded in magnetic field, and recycling the crushed molded body into slurry.

Abstract: An object of the invention is to provide a thermocouple having a high response speed without receiving mechanical damages such as bending and curving even when it is used in a high-speed fluid.

Abstract: The permanent magnetic alloy of the present invention comprises an R—Fe—B alloy wherein R is at least one element selected from rare earth elements including Y. The R—Fe—B alloy has a composition mainly comprising Fe, substantially containing no N, and containing 4 at. % or more of B. The permanent magnetic alloy substantially comprises a TbCu7 hard magnetic phase (main phase) and a fine crystal having an average crystal grain size of less than 5 nm and/or an amorphous phase, and has high magnetic properties.

Abstract: The permanent magnetic alloy of the present invention comprises an R—Fe—B alloy wherein R is at least one element selected from rare earth elements including Y. The R—Fe—B alloy has a composition mainly comprising Fe, substantially containing no N, and containing 4 at. % or more of B. The permanent magnetic alloy substantially comprises a TbCu7 hard magnetic phase (main phase) and a fine crystal having an average crystal grain size of less than 5 nm and/or an amorphous phase, and has high magnetic properties.

Abstract: A high-resistance rare earth magnet having a metal structure in which a rare earth magnet phase is dispersed throughout a compound phase comprising at least one compound selected from the group consisting of fluorides and oxides of Li, Na, Mg, Ca, Ba and Sr. The fluorides and oxides are effective for increasing the electrical resistance of a rare earth magnet to a level sufficient for practical use while maintaining high magnetic properties of the magnet.