Mitsui Minings & Melting Co., Ltd.

Masaaki Inamura

Haruka Shimizu

Jun-ichi Itoh

Akinori Kumagai

Asuka Sasakura

Takayoshi Mori

Hiroki Tanaka

Masanori Sato

Riichi Ogawara

Michiyo Inoue

Masaaki Haneda

Yuma Kako

Jun-Ichi Itoh

The present invention provides an exhaust gas purifying catalyst including a first catalyst layer (). The first catalyst layer () includes a first section () and a second section () in an exhaust gas flow direction, the first section () being located on an upstream side in the exhaust gas flow direction relative to the second section (). The first section () and the second section () both contain a catalytically active component including a specific element. A concentration of the specific element is higher in the first section () than in the second section (). A concentration gradient of the specific element contained in the first section () in a thickness direction of the catalyst layer () is milder than a concentration gradient of the specific element contained in the second section () in the thickness direction.

Exhaust gas purification catalyst

A nitrogen oxide storage material comprising: MgAlO, wherein y is a number satisfying 0&#x2264;y&#x2264;0.2, a noble metal, an oxide of a metal other than the noble metal, and a barium compound, the noble metal, the oxide, and the barium compound being loaded on MgAlO. The metal oxide comprises at least one metal oxide selected from zirconium oxide, praseodymium oxide, niobium oxide, and iron oxide.

Nitrogen oxide sorbent and exhaust gas cleaning catalyst

Proposed is a phosphor capable of effectively inhibiting the occurrence of adverse influence of a sulfur-based gas while improving water resistance of the phosphor and effectively inhibiting the corrosion of a metallic member. A phosphor is proposed, which includes particles or a layer provided on the surface of a sulfur-containing phosphor, which contains sulfur in a host material, and containing a crystalline metal borate containing an IIA-Group element, boron, and oxygen.

Phosphor and use thereof

Provided is a novel CaS-based phosphor with which chemical reactions can be inhibited even if said CaS-based phosphor is heated with a heterogeneous material. This phosphor includes: a crystalline parent material represented by the composition formula CaSrS.yZnO (in the formula, 0&#x2266;x&#x3c;1, 0&#x3c;y&#x2266;0.5); and a luminescent center.

Phosphor, LED light-emission element, and light source device

Provided is a novel coated phosphor capable of effectively suppressing the adverse effects of hydrogen sulfide gas generated by the reaction between a sulfur-containing phosphor and moisture in the air. Provided is a sulfur-containing phosphor having a configuration in which ZnO compound containing Zn and O is present on the surface of a sulfur-containing phosphor having a host material which includes sulfur.

Sulfur-containing phosphor coated with ZnO compound

A highly reliable light-emitting device is provided, which is capable of effectively suppressing detrimental effects of sulfuric gas. A light-emitting device comprising a solid light-emitting element, a metal memberreacting with sulfuric gas and a phosphor-containing layerthat contains a phosphor, the phosphor-containing layercontaining a sulfuric gas-adsorbing substancethat adsorbs sulfuric gas, and, when the phosphor-containing layeris tripartitioned from the side near the metal member to far into a proximal layer portion, an intermediate layer portion and an outer layer portion, the concentration of sulfuric gas-adsorbing substancein the proximal layer portion is made to be higher than those for the intermediate layer portion and the outer layer portion.

Growing community of inventors

Ageo, Japan

Masaaki Inamura