Abstract: In order to provide a light heat insulating member having both an extremely low thermal conductivity and a high heat resistance in an atmosphere, in which pressure is reduced, a core member consisting of accumulated heat resisting inorganic fiber is put between a high temperature side skin member and a low temperature side skin member made of heat resisting fiber textile and these three members are tied all together in one body by sewing, using heat resisting inorganic fiber thread. It is possible to reduce the thermal conductivity to an extremely small value by adding a material having a high emissivity (SiC powder, SiC whisker) to the core member and to prevent scattering of material constructing the core member by covering side wall parts of the core member by the high temperature skin member.

Abstract: The apparatus of the present invention comprises: an excitation device which excites the measurement site with a local direct-current or alternating-current magnetic field, and a plurality of magnetic field detection devices which are disposed in proximity to each other to measure the magnetic field component that is perpendicular to the exciting magnetic field.

Abstract: In order to provide a light heat insulating member having both an extremely low thermal conductivity and a high heat resistance in an atmosphere, in which pressure is reduced, a core member consisting of accumulated heat resisting inorganic fiber is put between a high temperature side skin member and a low temperature side skin member made of heat resisting fiber textile and these three members are tied all together in one body by sewing, using heat resisting inorganic fiber thread. It is possible to reduce the thermal conductivity to an extremely small value by adding a material having a high emissivity (SiC powder, SiC whisker) to the core member and to prevent scattering of material constructing the core member by covering side wall parts of the core member by the high temperature skin member.

Abstract: An in-situ porous inorganic material with a skeleton structure of aluminum borate whiskers, and a whisker-reinforced metal-matrix composite material including the porous inorganic material as a reinforcement, has aluminum borate whiskers distributed uniformly and randomly therein. Each of a plurality of the aluminum borate whiskers is bonded to at least another one of the aluminum borate whiskers at a bonding site, which is formed from aluminum borate common to and constituting part of each one of the aluminum borate whiskers bonded at the bonding site. A process of producing the in-situ porous inorganic material includes the steps of firing a compact of mixed powder including an aluminum compound, a boron compound, and a nickel compound and thereby in-situ synthesizing the aluminum borate whiskers.

Abstract: Image rotation of a cathode ray tube caused by the influence of earth magnetism can be suppressed. An image rotation correcting coil for generating a magnetic field of the direction opposite to that of a horizontal earth magnetism component of the direction vertical to the picture tube is disposed between a deflection yoke formed at the outside of a tube envelope of a cathode ray tube and an anode button.

Abstract: A density-moisture measuring apparatus includes an NaI scintillator 4 which detects only a gamma ray from a californium 1 which has passed through an object 20, a plastic scintillator 15 for detecting the gamma ray and a fast neutron ray, and a photomultiplier 6 coupled to these scintillators. It can be said that there is a proportional relation between gamma ray data Nc and N.gamma. which have passed through the object 20 detected by the NaI scintillator 4 and the plastic scintillator 15. The gamma ray data and the fast neutron ray data N.gamma. and Nn detected by plastic scintillator 15 are not separated from each other even by a pulse-shape discrimination, but they can be separated by using a relation between gamma ray data Nc detected by the NaI scintillator 4 and the gamma ray data detected by the plastic scintillator 15. Further, since a plastic scintillator 15 is used, handling is easy.

Abstract: This invention relates to a shaped fibrous material for use in the manufacture of fiber-reinforced metals comprising a uniform mixture of ceramic fibers and aluminum borate whiskers. The invention also relates to a method for producing the shaped fibrous material comprising the steps of dispersing ceramic fibers and aluminum borate whiskers in a suitable solvent containing a binder to form a slurry, transferring the slurry into a suction molding, aspirating and dehydrating the slurry to form a shaped dehydrated fibrous material, and drying and firing the shaped dehydrated fibrous material to obtain the shaped fibrous material. The shaped fibrous material can be cast efficiently into a fiber-reinforced metal with a high yield. The thus produced fiber-reinforced metal has a high wear resistance combined with a very mild nature of attacking the mating member.

Abstract: A process of production of alumina short fiber reinforced magnesium or magnesium alloy product features formation of alumina short fiber pre-form utilizing a inorganic binder which is composed of one or more oxides having thermodynamically stability equivalent to or higher than MgO. In the alternative, the composite almina fiber and binder surfaces of the alumina short fiber pre-form can be coated by a baked coating layer. Pressure casting of molten magnesium or magnesium alloy is then performed for forming the final products.

Abstract: A method for the insulation of a hot metallic material which is heated for hot working is described, which comprises applying a mixture of acidic aluminum phosphate, e.g., aluminum hydrogenorthophosphate, a multivalent metal oxide, hydroxide, silicate or carbonate powder, and water onto the surface of the hot metallic material and allowing the mixture to be heated by the heat of the hot metallic material to convert it to a porous hardened material. The porous hardened material acts as an insulating coating layer for the hot metallic material, permitting hot working in an insulated state for a long period of time.