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公开(公告)号：JPH1022532A
公开(公告)日：1998-01-23
申请号：JP18675296
申请日：1996-06-27
Applicant: NAT AEROSPACE LAB
Inventor： TANJI YASUNORI , KUMAGAI TATSUO , MORIYA SHINICHI , OSHIMA TAMIO , SHINNO MASAYUKI , TADA YASUO
Abstract: PROBLEM TO BE SOLVED: To prevent deterioration of thermoelectric conversion characteristics caused by sublimation and oxidation, etc., of an element in PbTe, for example and attain stable thermoelectric conversion for a long period by crowning at least a high temperature side end part of a thermo-element with a conductive block having a recessed part in which the end part is force-fitted. SOLUTION: Since edge parts 1H and 1L of a thermo-element 1 are crowned with a conductive block 3, the end part can be electrically and thermally combined to other parts by the conductive block 3. The thermo-element 1 and the conductive block 3 are combined by force-fitting a thermo-element end part to the recessed part 1 of the conductive block 3. Since there is a possibility of generation of a gap between a thermo-element and a conductive block microscopically, generation of heat shearing stress can be avoided even if the high temperature side end part 1H is subjected to high temperature heating. Furthermore, it is possible to avoid generation of sublimation and oxidation of a constituent element of the thermo-element 1 and prevent variation of an element and deterioration of characteristics.
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公开(公告)号：JPH1065222A
公开(公告)日：1998-03-06
申请号：JP23258396
申请日：1996-08-14
Applicant: NAT AEROSPACE LAB
Inventor： NODA YASUTOSHI , KOU ENSEI , TANJI YASUNORI , KUMAGAI TATSUO , SHINNO MASAYUKI , TADA YASUO
Abstract: PROBLEM TO BE SOLVED: To enable a thermoelectric conversion device to be surely manufactured which is long in service life and high in reliability. SOLUTION: A sintered or a molten thermoelectric semiconductor material 4 is prepared. The material 4 and electrode materials 5 are pressed against each other and plasma-bonded together by applying a large current, whereby a thermoelectric conversion main body 11 formed of the material 4 and electrodes 12 are integrated into one piece for the formation of a thermoelectric conversion device 10.
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Patent Agency Ranking
公开(公告)号：JPH0361834A
公开(公告)日：1991-03-18
申请号：JP19659889
申请日：1989-07-31
Applicant: NAT AEROSPACE LAB , KAWASAKI HEAVY IND LTD
Inventor： OKAMOTO OSAMU , TADA YASUO , NAKATANI TERUOMI , SUZUKI SEIZO , SAKAI YOSHINORI , NIWA SENJI
Abstract: PURPOSE:To make it possible to impart an arbitrary nonlinear repeating load on various kinds of raw materials and primary-structure materials constantly by constituting a load actuator with a composite eccentric type direct motor- driven positioner which has a stage characterized by four degrees of freedom so that the driving can be controlled. CONSTITUTION:An output shaft is positioned at an original point. Under this state, a test piece 50 is inserted into an upper tightening device 5 and fixed. The lower end is fixed to a tightening device which is linked to a stage 31 through a universal joint 10. At this time, the output shaft 30 can be freely moved up and down. At this time, a signal for the precession of the output shaft is inputted into a composite eccentric type direct motor-driven positioner which is a load actuator. Then the output shaft performs twisting rotation thetaZ around the axis based on an output signal and also performs circular motion at a specified radius and at a specified speed within a two-dimensional plane. The motion close to the specified precession is repeatedly loaded on the test piece 50. During this period, six components of force acting on the device 5 are detected with a load cell 7.
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公开(公告)号：JPH1022534A
公开(公告)日：1998-01-23
申请号：JP18675196
申请日：1996-06-27
Applicant: NAT AEROSPACE LAB
Inventor： TANJI YASUNORI , NODA YASUTOSHI , KUMAGAI TATSUO , KIZARA KATSUHITO , KOU ENSEI , SHINNO MASAYUKI , TADA YASUO
Abstract: PROBLEM TO BE SOLVED: To enable a base material to be doped with impurities surely at a required doping amount, that is, with good controllability uniformly by making impurities react on a constituent element of a base material once to be a compound and adding and dispersing it to a base material. SOLUTION: High frequency current is supplied to a high frequency coil 2 and the coil is heated. In the process, at first, it is heated at a temperature which is lower than a fusing point of a base material 5 and higher than a fusing point of impurities 4. A compound Na2 Te is produced by making Na of the impurity element material 4 and Te of a base material react in this way. Oxidizing property of the compound is greatly weak when compared with Na only and becomes a stable substance. Then, heating of a high temperature is carried out. The high temperature heating is carried out at a temperature which is higher than a fusing point of Pb and Te of a base material for dissolving all the raw material inside a crucible 1 and contents inside the crucible 1 are fully agitated and mixed while the high temperature heating is maintained. Thereby, impurities of Na can be dispersed uniformly and entirely into a base material of PbTe.
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公开(公告)号：JPH1074986A
公开(公告)日：1998-03-17
申请号：JP18314697
申请日：1997-06-24
Applicant: NAT AEROSPACE LAB
Inventor： NODA YASUTOSHI , KOU ENSEI , KIZARA KATSUHITO , KUMAGAI TATSUO , TANJI YASUNORI , CHIN RITSUTOU , SHINNO MASAYUKI , TADA YASUO
Abstract: PROBLEM TO BE SOLVED: To obtain highly reliable thermoelectric elements for low, intermediate and high temperatures having long service life by performing discharge plasma sintering, while pressing a thermoelectric semiconductor material against an electrode material thereby integrating a thermoelectric conversion element body and an electrode. SOLUTION: A metal plate or a metal powder electrode material 6 composing one electrode of a thermoelectric conversion element, a powdery thermoelectric semiconductor material 5 composing a thermoelectric conversion element body, and the metal plate or metal powder electrode material 6, composing the other electrode of the thermoelectric conversion element are arranged sequentially on a lower punch 4 in the cavity 1 of a die 2. Both upper and lower punches 3, 4 are then pressed to compress the electrode material 6 and the thermoelectric semiconductor material 5. Under that state, a high current is conducted between the upper and lower punches 3, 4 in order to perform discharge plasma sintering, thus integrating the electrode material 6 and the thermoelectric semiconductor material 5. According to the method, highly reliable thermoelectric elements for low, intermediate and high temperatures, having long service life can be obtained.
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公开(公告)号：JPS62238440A
公开(公告)日：1987-10-19
申请号：JP8267986
申请日：1986-04-10
Applicant: NAT AEROSPACE LAB
Inventor： TADA YASUO
Abstract: PURPOSE:To simplify a structure and a mechanism as a whole, by interposing a wedge jig tightening metal fitting between upper and lower wedge jigs in a freely detachable manner. CONSTITUTION:In order to mount a test piece by this jig, chuck teeth 15 each having a proper thickness are selected to fix the grasping part provided to the lower part of the test piece 16 between lower chucks 8, 9. At this time, by eliminating the height difference between the upper surfaces of the left and right chucks 8, 9, it is secured that the centering in an X-axis direction is performed. Next, bolt jacks 17 being wedge jig tightening metal fittings are placed on the chucks 8, 9 and upper chucks 6, 7 having chuck teeth 15 each having a proper thickness mounted thereon are respectively placed on the bolt jacks 17 to apply pre-load. At this time, the load is directly transmitted to the lower chucks 8, 9 from the upper chucks 6, 7 through the bolt jacks 17 and only the force in the X-axis direction for meshing with the chuck teeth 15 is applied to the test piece 16 and, thereafter, the pre-load is returned at once to zero value to pull off the bolt jacks 17 to complete the mounting.
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公开(公告)号：JPS59133042A
公开(公告)日：1984-07-31
申请号：JP677683
申请日：1983-01-19
Applicant: Nat Aerospace Lab
Inventor： TADA YASUO , ISHIKAWA TAKASHI
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