Mitsui Minings & Melting Co., Ltd.

Haruka Shimizu

Masaaki Inamura

Jun-ichi Itoh

Akinori Kumagai

Takayoshi Mori

Hiroki Tanaka

Asuka Sasakura

Masanori Sato

Michiyo Inoue

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

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

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.

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Ageo, Japan

Haruka Shimizu