Mitsui Minings & Melting Co., Ltd.

Takayoshi Mori

Jun-ichi Itoh

Masaaki Inamura

Haruka Shimizu

Ikuhiro Ozawa

Akinori Kumagai

Masanori Sato

Michiyo Inoue

Riko Sato

Jun-Ichi Itoh

Provided is a new phosphor which can be excited by visible light in a wide band to emit a broad fluorescence spectrum, and also to emit near-infrared light with high intensity. Proposed is a phosphor, which is an oxide comprising Ca, Cu, and Si, wherein the containing molar ratios of the elements are 0.15&#x2264;Ca/Si&#x3c;0.25 and 0.13&#x2264;Cu/Si&#x3c;0.25.

Phosphor

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 phosphor, which is excited by a wide band of visible light, capable of emitting near-infrared light of high intensity. The phosphor comprises a crystal phase represented by a formula (1): MCuSiO(where M comprises one or more of Ba, Sr and Ca), and a crystal phase represented by a formula (2): MCuSiO(where M comprises one or more of Ba, Sr and Ca), wherein a ratio &#x3b2; of a diffraction peak intensity of MCuSiOwith respect to a diffraction peak intensity of MCuSiOin an X-ray diffraction (XRD) pattern obtained by powder XRD measurement using CuK&#x3b1; rays is 0&#x3c;&#x3b2;&#x2264;0.50.

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.

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Ageo, Japan

Takayoshi Mori