Mitsubishi Chemical Corporation

Masumi Itou

Naoto Kijima

Hiromu Watanabe

Hiroshi Wada

Keiichi Seki

Motoyuki Shigeiwa

Kaoru Terada

A nitride phosphor contains europium as an activating element and strontium, or strontium and calcium, as divalent metal elements. The phosphor further includes aluminum and silicon. Of the europium in the phosphor, at least 85% is in the form of Eu. The phosphor has a peak emission wavelength of from 590 nm to 650 nm. A phosphorescent body that includes the phosphor can be suitable for converting a wavelength of at least a portion of light emitted from an excitation light source in a light-emitting device.

Europium- and strontium-based phosphor

The present invention relates to a phosphor comprising a nitride or an oxynitride, comprising an X-ray powder diffraction pattern comprising at least one Region having at least one peak with an intensity ratio I of 8% or less, the X-ray powder diffraction pattern measured in the 2&#x3b8; range from 10&#xb0; to 60&#xb0; using a CuK&#x3b1; line (1.54184 {acute over (&#x212b;)}), wherein the Region is the 2&#x3b8; range from 41.5&#xb0; to 47&#xb0;, the intensity of each peak is a value obtained after background correction, and the intensity ratio I is defined by the formula (I&#xd7;100)/I(%), where Irepresents the height of the most intense peak present in the 2&#x3b8; range from 34&#xb0; to 37&#xb0; and Irepresents the height of each peak.

Alloy powder for raw material of inorganic functional material and phosphor

The present invention provides an alloy powder that is a material for producing inorganic functional materials such as phosphors, a phosphor with high brightness, and a method for producing the phosphor. An alloy powder for an inorganic functional material precursor contains at least one metal element and at least one activating element Mand has a weight-average median diameter Dof 5 &#x3bc;m to 40 &#x3bc;m. A method for producing a phosphor includes a step of heating an alloy, containing two or more metal elements for forming the phosphor, in a nitrogen-containing atmosphere.

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Yokohama, Japan

Masumi Itou