| 摘要 |
PURPOSE: A manufacturing method of a Sr-Al-O-based phosphor is provided to manufacture a Sr-Al-O-based phosphor with excellent long afterglow characteristics by controlling contents of starting compositions such as Eu2O3, Dy2O3, and B2O3. CONSTITUTION: A manufacturing method of a Sr-Al-O-based phosphor has a starting composition represented by chemical formula 1: Sr_(1-x)Al_(2-y)O_4: xEu, yDy + zB_2O_3. k, represented by mathematical formula 1: [Al]/[Sr] + [Eu] + 1.5[Dy], is 1.85±0.01. In chemical formula 1, 0.02<=x<=0.06, 0.01<=y<0.06, and 0.1<=z<=0.4. In mathematical formula 1, each of [] is a mole number of each material. A manufacturing method of the phosphor includes a step of mixing starting raw materials; and a step of synthesizing the phosphor represented by chemical formula 1, by heat-treating the starting raw materials in a reduction atmosphere. |
