| abstract |
There is provided a method for preparing a β -SiAlON phosphor capable of be controlled to show characteristics such as high brightness and desired particle size distribution. The method for preparing a β -SiAlON phosphor represented by Formula: Si(6-x)AlxOyN(6-y): Lnz (wherein, Ln is a rare earth element, and the following requirements are satisfied: 0 < x ≤ 4.2, 0 < y &le, 4.2, and 0 < z ≤ 1.0) includes: mixing starting materials to prepare a raw material mixture; and heating the raw material mixture in a nitrogen-containing atmospheric gas, wherein the starting materials includes a host raw material including a silicon raw material including metallic silicon, and at least one aluminum raw material selected from the group consisting of metallic aluminum and aluminum compound, and at least activator raw material selected from the rare earth elements for activating the host raw material. |