Mitsui Mining and Smelting Co.

Saitama, Japan

Mitsui Mining and Smelting Co.

Saitama, Japan

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Patent
Mitsui Mining and Smelting Co. | Date: 2017-01-20

The present invention provides an abrasive material capable of polishing difficult-to-polish silicon carbide at a high degree of surface precision. The present invention relates to an abrasive material including manganese dioxide particles having a non-needle-like shape possessing a ratio of the longitudinal axis to the transverse axis of the particles observed with a scanning electron microscope of 3.0 or less. The abrasive material is preferable if the average particle size D_(SEM )of the longitudinal axis of the observed particles is 1.0 m or less, and if the particle size D_(50 )of the volume-based cumulative fraction of 50% in laser diffraction/scattering particle size distribution measurement is 2.0 m or less.


Patent
Mitsui Mining and Smelting Co. | Date: 2016-11-22

The exhaust gas purification catalyst carrier of the invention includes a modified aluminum borate which contains aluminum borate and at least one addition element selected from the group consisting of a rare earth element and an alkaline earth metal and which has an electronegativity of 2.732 or lower.


Provided is a conductor connection structure (10) in which two conductors (21, 31) are electrically connected by a copper connection part (11). The connection part (11) comprises a material containing mainly copper. The connection part (11) also comprises a plurality of holes. An organosilicon compound is present within the holes. The connection part preferably has a structure in which a plurality of gathered particles are melted and bonded together and the particles have a necking section therebetween. In addition, the connection structure (10) preferably has a structure in which a plurality of large copper particles having a relatively large particle size and a plurality of small copper particles having a particle size smaller than that of the large copper particles are melted and bonded together such that the large copper particles and the small copper particles are bonded together, the small copper particles are bonded together, and a plurality of small copper particles are positioned around one large copper particle.


Patent
Mitsui Mining, Smelting Co. and Yamanashi University | Date: 2015-03-05

To provide a membrane-electrode assembly including a catalyst layer that includes a catalyst-supporting carrier in which a catalyst is supported on a carrier made of an inorganic oxide, and a highly hydrophobic substance having a higher degree of hydrophobicity than the inorganic oxide, the catalyst layer being formed on at least one surface of a polymer electrolyte membrane. It is preferable that, in the membrane-electrode assembly, the degree of hydrophobicity of the highly hydrophobic substance is from 0.5 vol % to 45 vol % at 25 C., the degree of hydrophobicity being defined as a concentration of methanol (vol %) when a light transmittance of a dispersion obtained by dispersing the highly hydrophobic substance in a mixed solution of water and methanol reaches 80%.


Patent
Mitsui Mining and Smelting Co. | Date: 2016-01-12

The invention relates to a catalyst carrier for exhaust gas purification catalyst which contains a metal phosphate containing Zr, and it provides a new catalyst carrier which exhibits excellent NOx purification performance in a high temperature region. The invention proposes a carrier for exhaust gas purification catalyst containing a metal phosphate which has a NASICON type structure and contains Zr.


Patent
Mitsui Mining and Smelting Co. | Date: 2017-05-24

Proposed is a new sulfide-based solid electrolyte for lithium ion batteries, the sulfide-based solid electrolyte relating to a compound that has a cubic argyrodite type crystal structure and is represented by Li_(7-x-2y)PS_(6-x-y)Cl_(x), and having excellent water resistance and oxidation resistance. Proposed is a sulfide-based solid electrolyte for lithium ion batteries, the sulfide-based solid electrolyte containing a compound that has a cubic argyrodite type crystal structure and is represented by compositional formula (1): Li_(7-x-2y)PS_(6-x-y)Cl_(x), in which compositional formula, conditions: 0.8 x 1.7 and 0 < y - 0.25x + 0.5 are satisfied.


To provide a connection structure (10) including two conductors (21, 31) and a copper connection (11) electrically connecting the conductors. The connection (11) is made mainly of copper. The connection (11) has a plurality of voids. The connection (11) contains an organosilicon compound in the voids. The connection preferably has a microstructure including an aggregate of a plurality of particles that are fused and bonded to each other to form a neck therebetween. Preferably, the connection has a microstructure including a plurality of large-diameter copper particles having a relatively large diameter and small-diameter copper particles having a smaller diameter than the large-diameter copper particles, the large-diameter copper particles each being fused and bonded to the small-diameter copper particles, the small-diameter copper particles being fused and bonded to each other, and a plurality of the small-diameter copper particles being located around the large-diameter copper particle.


Patent
Mitsui Mining, Smelting Co. and Honda Corporation | Date: 2016-12-14

A fuel reforming catalyst which contains an inorganic porous support, a catalytically active species, and catalyst particles including CeO_(2) and ZrO_(2) and in which the concentration of ZrO_(2) in the catalyst particles is higher in the vicinity of the particle surface than in the particle interior and the concentration of CeO_(2) in the catalyst particles is equal in the particle interior and in the vicinity of the particle surface is proposed for the purpose of providing a new fuel reforming catalyst which can effectively lower the concentration of the hydrocarbon of C2 or more in the gas which has passed through a steam reforming reaction.


The exhaust gas purification catalyst carrier of the invention includes a modified aluminum borate which contains aluminum borate and at least one addition element selected from the group consisting of a rare earth element and an alkaline earth metal and which has an electronegativity of 2.732 or lower.


Patent
Mitsui Mining and Smelting Co. | Date: 2016-09-07

Provided is a carrier for an exhaust gas purification catalyst containing aluminum borate particles having a peak (pore peak) exhibiting the highest intensity in a void volume diameter range of from 20 nm to 100 nm in a logarithmic differential void volume distribution measured using a mercury intrusion porosimeter, in order to provide a new catalyst support capable of effectively suppressing a decrease in catalytic performance caused by sulfur (S) component contained in the exhaust gas, in the case of supporting Pd as a catalytically active component.

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