Japan National Institute of Materials Science

Ibaraki, Japan

National Institute for Materials Science is an Independent Administrative Institution and one of the largest scientific research centers in Japan. Wikipedia.

Time filter
Source Type

Japan National Institute of Materials Science | Date: 2017-03-22

By using silicon oxynitride with an oxygen content of 4.2 to 37.5 at% as a material for a barrier layer, adhesiveness similar to that of silicon oxide and an Ag diffusion prevention property similar to that of silicon nitride can be realized. In particular, in a semiconductor device in which a plurality of silicon chips is vertically stacked by through-silicon vias, Ag is prevented from being diffused into Si and adhesiveness to Si becomes favorable when an Ag/polypyrrole complex is used as a conductive filling material used for the formation of a barrier layer provided on the inner surface of the via.

Japan National Institute of Materials Science | Date: 2017-05-31

The present invention improves the sensitivity and the responsiveness of a dryness/wetness responsive sensor utilizing a galvanic current, allowing for downsizing of the dryness/wetness responsive sensor. Instead of the conventional structure in which an anode electrode and a cathode electrode are stacked with an intervening insulator, the present invention employs a structure in which both electrodes run in juxtaposition with each other on an insulating substrate in the form of, for example, a comb-shaped electrode as shown in the drawing. By utilizing a semiconductor manufacturing process or any other micro/nano-fabrication technology, an inter-electrode distance can be extremely shortened as compared with the conventional sensors, allowing enhancing the sensitivity per unit footprint of the electrodes. Accordingly, a decrease in the size of the dryness/wetness responsive sensor can be easily achieved.

The present invention relates to an organic/heterometallic hybrid polymer including a plurality of organic metal complexes and a plurality of transition metals, the organic/heterometallic hybrid polymer, whereinthe plurality of organic metal complexes are linked in a linear manner by sandwiching each of the plurality of transition metals therebetween,the organic metal complexes include two ligands each having a terpyridyl group and one connector having Ru(dppe)_(2) and two ethynylene groups, and the two ligands are linked by the connector, so that a nitrogen atom at position 1 of the terpyridyl group is directed toward the terminal side of the molecule of the organic metal complex, andthe terpyridyl groups of at least two different organic metal complexes of the plurality of organic metal complexes are bound to one of the transition metals through a coordinate bond, thereby linking the plurality of organic metal complexes while sandwiching the plurality of transition metals alternately therebetween.

As an object to provide a lithium-ion supercapacitor having a high energy density and a high power density, capable of being charged and discharged many times, and having a long product life, there is provided a lithium-ion supercapacitor using a graphene/CNT composite electrode, the lithium-ion supercapacitor including: an anode; a cathode that is arranged to be separated from the anode; and a lithium ion electrolytic solution that fills in a space between the anode and the cathode, wherein either or both of the cathode and the anode are formed by a graphene/CNT composite, and a CNT concentration in the graphene/CNT composite is 17 wt% or more and 33 wt% or less.

A nano-coating material, capable of being bonded to the surface of a metal or an alloy substrate, the nano-coating material includes a compound having, in a polymer main chain, (A) a first side chain or a terminal, each having a binding group containing a benzene ring having at least one pair of adjacent hydroxyl groups; and (B) a functional second side chain.

Yamamoto Scientific Tool Laboratory Co. and Japan National Institute of Materials Science | Date: 2017-05-10

An apparatus for measuring for measuring coefficient of restitution which is capable of reducing a mass effect and performing tests in free directions, is disclosed. The apparatus for measuring coefficient of restitution includes a holder for holding a spherical indenter, an ejection mechanism configured to eject the indenter held by the holder from the holder to a specimen, a speed measuring unit configured to measure an impact speed that is a speed of the indenter before the indenter impacts against the specimen, and a rebound speed that is a speed of the indenter after the indenter is rebounded from the specimen; and an arithmetic unit configured to calculate a coefficient of restitution that is a ratio of the rebound speed to the impact speed.

Japan National Institute of Materials Science | Date: 2017-06-07

The present invention addresses the problem of providing an element which uses the current-perpendicular-to-plane giant magnetoresistance (CPPGMR) effect of a thin film having the three-layer structure of ferromagnetic metal/non-magnetic metal/ferromagnetic metal. The problem is solved by a magnetoresistive element provided with a lower ferromagnetic layer and an upper ferromagnetic layer which contain a Heusler alloy, and a spacer layer sandwiched between the lower ferromagnetic layer and the upper ferromagnetic layer, the magnetoresistive element being characterized in that the spacer layer contains an alloy having a bcc structure. Furthermore, it is preferable for the alloy to have a disordered bcc structure.

Japan National Institute of Materials Science | Date: 2017-05-03

Provided is a magnetic refrigerating device with improved refrigerating capacity and refrigerating efficiency by way of improving the heat exchanging method between a magnetic material and a heat exchanging fluid and devising a magnetic field applying method. The magnetic refrigerating device comprises: a cylindrical active magnetic regenerator (AMR) bed that accommodates a refrigerant therein; two magnetic materials that are disposed in the AMR bed in the axial direction, that are configured to be movable in the axial direction of the AMR bed, and that are made of material having a magnetocaloric effect; at least two permanent magnets positioned to face the two magnetic materials in the AMR bed; a rotary shaft that is positioned between the two magnetic materials in the AMR bed and that is positioned between the at least two permanent magnets; and a magnetic rotary movement unit that rotationally moves the permanent magnets about the rotary shaft and that repeatedly moves the permanent magnets and the two magnetic materials closer together and farther apart in association with the rotational movement.

Japan National Institute of Materials Science | Date: 2017-09-27

A method for producing porous particles includes (1) a step of preparing a solution of an amphiphilic substance by dissolving the amphiphilic substance in a mixed solvent capable of being freeze-dried, (2) a step of producing a precipitate containing the amphiphilic substance by cooling the solution obtained in step (1) to a temperature equal to or less than a phase separation temperature of the solution, and thereafter holding the solution at the temperature, and (3) a step of producing porous particles by freeze-drying the solution containing the precipitate obtained in the step (2).

Japan National Institute of Materials Science | Date: 2017-09-20

The invention provides a film-forming composition containing a tannic acid derivative in which hydrogen atoms in at least some of hydroxyl groups of tannic acid are substituted by a chain hydrocarbon group having 3 to 18 carbon atoms. The film-forming composition of the invention can provide a good enough film on a variety of substrate materials, having improved effects on rust prevention or the like.

Loading Japan National Institute of Materials Science collaborators
Loading Japan National Institute of Materials Science collaborators