PHOSPHOR POWDER PREPARED BY ALKALI TREATMENT OF SILICATE PHOSPHOR CONTAINING CHLORINE AND METHOD FOR PREPARING THE SAME

摘要

PURPOSE: A manufacturing method of chlorine-based phosphor or oxide-based phosphor is provided to increase light-emitting intensity of phosphor, in which rare earth metal is added, through strong oxidation or reduction using chloride, and to able to manufacture a more stable phosphor. CONSTITUTION: A manufacturing method of chlorine-based phosphor or oxide-based phosphor comprises a step of treating chloride-containing silicate phosphor to alkaline material. The alkaline material comprises a compound containing -OH, -NH2, or NH3. The alkaline compound comprising -OH comprises LiOH, NaOH, KOH, RbOH, CsOH, NH4OH, H2O2, or combinations thereof. A treatment to the alkaline material is conducted at (-100) - 1500°C. The chloride-based phosphor additionally comprises rare earth metal.