| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a production process for a composite nitride phosphor in a powdered form which exhibits a high light emission intensity and can be fired at a low cost. <P>SOLUTION: The production process of a composite nitride phosphor containing a small amount of oxygen represented by general formula (I): M<SP>1</SP><SB>a</SB>M<SP>2</SP><SB>b</SB>M<SP>3</SP><SB>c</SB>M<SP>4</SP><SB>d</SB>N<SB>e</SB>O<SB>f</SB>, wherein 0.00001≤a≤0.15, 0.5≤b≤2, 0.5≤c≤2, 0.5≤d≤2, 1.5≤e≤6, 0<f≤1.2, and 0<f/(e+f)≤0.2, comprises firing a powder of mixed raw materials containing a simple substance and/or a compound of an activating element M<SP>1</SP>, a nitride of a divalent metal M<SP>2</SP>, a nitride of a trivalent M<SP>3</SP>and a nitride of a tetravalent metal M<SP>4</SP>. The powder of mixed raw materials is set to have a bulk density of 0.05 g/cm<SP>3</SP>to 1 g/cm<SP>3</SP>, and fired at a temperature of ≥1,200°C to ≤1,750°C, and the total molar number of oxygen in the raw material to be fired is set at 1% to 20% of the total molar number of nitrogen and oxygen in the raw material. <P>COPYRIGHT: (C)2008,JPO&INPIT |
