公开(公告)号：JP2003148247A

公开(公告)日：2003-05-21

申请号：JP2001345769

申请日：2001-11-12

Applicant: NAT AEROSPACE LAB ,  JAPAN SCIENCE & TECH CORP

Inventor： SHINNO MASAYUKI ,  KIZARA KATSUHITO ,  MORO AKIO ,  FUJITA KAZUHISA ,  V KMETIK ,  NAKANO MASAKATSU

IPC: B64G1/00 ,  F02K9/08 ,  F03H1/00 ,  H01S3/00

Abstract: PROBLEM TO BE SOLVED: To provide a system capable of easily adjusting a laser irradiation position to a propellant without receiving restrictions of a positional relation with a laser source for laser transmission and an installation place of a member in a laser propulsion system provided with advantageous conditions as a thrust generator used in a space structure. SOLUTION: A laser thruster system is composed of a laser oscillator, a flexible optical cable transmitting laser from the laser oscillator to a desired section, and a plasma injection device installed in a desired section. The plasma injection device has a simple structure having no movable part constituted of an injection nozzle having a megaphone shape, a condensing lens provided in a mouth application part of the nozzle, and a solid propellant storage part provided continuously behind the mouth application part. Moreover, the system is mounted in a space structure and a plurality of plasma injection devices are arranged to obtain a large propulsion force, and are arranged in desired sections to control an attitude and position in a desired direction.

公开(公告)号：JP2001052526A

公开(公告)日：2001-02-23

申请号：JP22252799

申请日：1999-08-05

Applicant: NAT AEROSPACE LAB

Inventor： TANJI YASUNORI ,  KIZARA KATSUHITO ,  KUMAGAI TATSUO ,  MORIYA SHINICHI ,  SHINNO MASAYUKI

IPC: H01L35/16 ,  H01B3/08 ,  H01B17/62 ,  H01L35/30

Abstract: PROBLEM TO BE SOLVED: To provide an inexpensive electric insulating coating film material excellent in heat resistance, heat transmittance and heat resistance strain characteristics in use at normal temperatures of 200-500 deg.C, in which an electric insulating coating film is formed at a heat treatment temperature of 500 deg.C or lower. SOLUTION: In a fabricating method, an electric insulating coating film material including a mixture 4 composed of composite glass powder containing water lass, PbO or the like and electric insulating powder is applied onto a metal substrate 2, followed by drying and heating, thereby causing a thermal oxidation reaction. Thus, an electric insulating coating film 7 consisting of an electric insulating oxide layer 5 and a glass-based coating film 6 is formed on the metal substrate.

公开(公告)号：JPH11220182A

公开(公告)日：1999-08-10

申请号：JP3552598

申请日：1998-02-02

Applicant: NAT AEROSPACE LAB

Inventor： TANJI YASUNORI ,  MORIYA SHINICHI ,  SHINNO MASAYUKI ,  KUMAGAI TATSUO ,  KIZARA KATSUHITO

IPC: B23K35/28 ,  H01L23/373 ,  H01L35/08

Abstract: PROBLEM TO BE SOLVED: To enable shifting at joint face, and perform electric and thermal coupling closely, by constituting a union medium 3 by such composition that the liquid-form metal and solid-phase metal show coexistence phase at all times, within the heating temperature range of a material to be jointed, that the quantity of solid solution changes, according to the temperature change, and that the fusing point changes gradually. SOLUTION: A jointing medium 3 is used for the union in the case where the fellow materials 1 and 2 to be joined different in thermal expansion coefficient are given different temperatures, or in such a like case. The jointing medium 3 is of such composition that the liquid-phase metal and the solid-phase metal show two-phase coexistence phase at all times in the temperature region from the room temperature (20 deg.C) to about 600 deg.C. It has a composition of including Gax Int-x and at least one hand of MA and MB. Here, x is a 0.1

公开(公告)号：JPH1131835A

公开(公告)日：1999-02-02

申请号：JP18664397

申请日：1997-07-11

Applicant: NAT AEROSPACE LAB ,  SHINNO MASAYUKI ,  KIZARA KATSUHITO ,  MITSUBISHI HEAVY IND LTD

Inventor： SHINNO MASAYUKI ,  KIZARA KATSUHITO ,  NAKAJIMA SHOJI ,  MATSUBAYASHI MASAYUKI

IPC: H01L31/04 ,  H01L31/042 ,  H01L35/28

Abstract: PROBLEM TO BE SOLVED: To enhance the solar heat utilization efficiency significantly by arranging a wavelength selection reflecting/transmitting film on the surface of a solar cell and arranging a thermoelectric power generation element and a heat exchanger oppositely to the solar cell. SOLUTION: A parabolic condenser 10 arranged to face the sun is provided, on the surface thereof, with a wavelength selection reflecting/transmitting film 8 transmitting a light of specified wavelength for generating power through a solar cell 1 selectively and reflecting other light. A solar cell 1 is arranged on the rear surface of the wavelength selection reflecting/transmitting film 8 and a heat exchanger 3A is arranged on the rear surface of the solar cell 1 in order to cool them. On the other hand, a thermoelectric power generation element 2 receiving the reflected light from the wavelength selection reflecting/ transmitting film 8 and a heat exchanger 3B for cool them are arranged oppositely to the condenser 10. According to the arrangement, the solar heat utilization efficiency can be enhanced significantly.

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

IPC: C22C11/00 ,  H01L35/16 ,  H01L35/34

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.

公开(公告)号：JPH07283443A

公开(公告)日：1995-10-27

申请号：JP8721894

申请日：1994-04-04

Applicant: NAT AEROSPACE LAB

Inventor： SHINNO MASAYUKI ,  EGUCHI KUNIHISA ,  ARASHI HARUO ,  KIZARA KATSUHITO

IPC: G21H1/10 ,  H01L31/02 ,  H01L35/28

Abstract: PURPOSE:To provide a high-efficiency thermoelectric converter for directly converting thermal energy at as high as 2000K generated by solar energy or nuclear energy as the power supplies for space station, satellite, moon surface base or deep space investigation to the electric energy. CONSTITUTION:Within converter, a thermoelectronic converter 1 and thermoelectric converter are used and an oblique structural materials as the thermoelectric conversion material. Furthermore, the thermoelectric converter is divided into parts if necessary from the high to low temperature parts so that these thermoelectric conversion materials in respective parts may be composed of the carrier concentration controlled materials corresponding to the partial temperature region or the oblique structural material in different materials thereby enabling respective temperature regions to be given the high electrical generating efficiency.

公开(公告)号：JPH0466656A

公开(公告)日：1992-03-03

申请号：JP17758690

申请日：1990-07-06

Applicant: NAT AEROSPACE LAB ,  NIPPON STEEL CORP

Inventor： SHINNO MASAYUKI ,  KITAGUCHI SABURO ,  SHIMODA NOBUYUKI ,  SAITO TORU

IPC: C23C4/10 ,  C23C4/12

Abstract: PURPOSE:To form heat resistant mixed thermal-spraying coated layer available in ultra high temp. and in an atmosphere with large temp. difference by symmetrically arranging plural powder charging holes to one thermal spraying gun and executing the thermal spraying. CONSTITUTION:In the case of executing the thermal spraying of (m) kinds (m>=2) of powders with one thermal spraying gun 1 at the same time, same kind of powder is jetted by supplying a same kind of powder through n Xpowder charging holes provided at the (n) symmetrical positions (n>=2), wherein the symmetrical axes are based on a cathode 2 as the center, and the thermal spraying is executed. For example, four charging holes are symmetrically set to the cathode (tungsten electrode) 2. Ceramic powder is charged from the faced charging holes Pa and Pc, and metal powder is charged from the charging holes Pb, Pd, and at the same time, the thermal spraying is executed. A uniformly mixed layer is obtd. over the whole zone of thermal spraying layer without developing disturbance of shape to the plasma jet. By this method, the ultra heat-resistant film for preventing the film from breakage and boundary detachment under ultrahigh temp. as well as large temp. difference atmosphere, can be formed.

公开(公告)号：JPH01249659A

公开(公告)日：1989-10-04

申请号：JP7600688

申请日：1988-03-31

Applicant: NIPPON OIL CO LTD ,  HIRAI TOSHIO ,  SASAKI MAKOTO ,  NAT AEROSPACE LAB

Inventor： KAMIMURA SEIICHI ,  HAYATA YOSHIHO ,  IDO TAIJI ,  HIRAI TOSHIO ,  SASAKI MAKOTO ,  SHINNO MASAYUKI

IPC: C01B31/02 ,  C04B35/83 ,  C04B41/52 ,  C04B41/87 ,  C04B41/89

Abstract: PURPOSE:To obtain the subject carbon/carbon composite material having an oxidation inhibiting coating film without release by depositing carbon and/or a ceramic in the open cavities of a specified carbon/carbon composite material by vapor-phase decomposition, and then depositing a ceramic on the surface. CONSTITUTION:A carbon/carbon composite material consisting of 10-70vol.% carbon fiber and 90-5vol.% carbonaceous matrix and having 10-55% open cavity ratio is prepared. Carbon and/or a ceramic are deposited and filled in the open cavities of the material by vapor-phase decomposition. Subsequently, a ceramic or a ceramic and carbon are deposited and filled on the surface of the filling material to obtain a carbon/carbon composite material having oxidation resistance. The obtained composite material is appropriately used as the parts of aerospace equipment, brakes, furnace materials, etc.

公开(公告)号：JPH01172266A

公开(公告)日：1989-07-07

申请号：JP31165286

申请日：1986-12-26

Applicant: AGENCY IND SCIENCE TECHN ,  NAT AEROSPACE LAB

Inventor： KANNO YOSHINORI ,  SHINNO MASAYUKI ,  HIRAI TOSHIO

IPC: C04B35/563 ,  B22F3/24 ,  C04B35/56 ,  C04B41/85

Abstract: PURPOSE:To improve shielding effect for neutron and strength of sintered B4C by allowing the sintered B4C to contact with a gaseous mixture consisting of a B compd., C compd., and a carrier at a relatively low temp. CONSTITUTION:For example, 4-5% in total (basing on the amt. of B4C powder) consisting of AlF3, amorphous carbon, and amorphous B is suspended in methanol, and B4C powder is changed to the suspension and mixed overnight. A starting material is obtd. by drying the mixture in vacuum, and then pulverizing and screening the dry product. Molded B4C is obtd. by treating the starting material in a die press and rubber press. The obtd. molded body is calcined at 2,200 deg.C for 30min in Ar atmosphere in a vacuum furnace, to obtain thus a sintered body having 94% theoretical density. Then, a gaseous mixture consisting of BCl3+CCl4+H2 is blown from a nozzle while holding the B4C sintered body at 1,400-1,500 deg.C. By this method, pores near the surface layer of the sintered B4C are filled with crystals of B4C, and the surface of the sintered B4C is reinforced.

公开(公告)号：JPS57212350A

公开(公告)日：1982-12-27

申请号：JP9630681

申请日：1981-06-22

Applicant: NAT AEROSPACE LAB

Inventor： SHINNO MASAYUKI ,  YATSUYANAGI NOBUYUKI ,  KUMAKAWA AKINAGA ,  SUZUKI AKIO ,  GOMI HIROMI ,  SAKAMOTO HIROSHI ,  SASAKI MASAKI

IPC: G01M15/14 ,  F02K9/64 ,  F02K9/96

Abstract: PURPOSE:To improve the critical heat flux density remarkably by a method wherein a saw-toothed array of fins is provided on a cooling surface and a mixing boiling property generated on the fin is utilized. CONSTITUTION:The combustion chamber is formed by the combination of annlar segments A having the cooling water flow paths such as a cooling water inlet pipe 1, an outlet pipe 2, a cooling water introducing pipe 3, an annular path 7 and the like and is provided with paths for fuel F, an oxidizer 0 and the cooling water CW. The cooling surface 5 of the alley of saw-toothed fin is formed on the surface of the combustion chamber side of the annular path 7 and the saw- toothed fin 8 on the cooling surface 5 of the alley of this saw-toothed fins is formed so as to have an apex angle of 60 deg., a height of 0.5mm. and a pitch of 0.6mm. substantially. Further, one of this path 7 is connected to the cooling water inlet pipe 1 while the other thereof is connected to the outlet pipe 2. According to this method, the cooling efficiency thereof may be improved remarkably.