YBO3:Eu荧光粉的水热法制备及形貌控制

用水热法在低于300℃成功地制备出具有不同形貌的YBO3:Eu3+荧光粉,其反应温度比固相反应了约800℃.研究了初始原料、pH值、反应温度、反应溶剂和催化剂等条件对目的产物形貌及粒度的,得到了具有Vaterite结构、粒度分布均匀的球形荧光粉的最佳合成工艺.在254nm激发下,水热法的球形Y0.95Eu0.05BO3荧光粉最强发射峰位于598nm处,属于Eu3+的5D0→7F1的跃迁,是固相反应所品的1.5倍.这些结果表明,在PDP和荧光灯等显示和照明用荧光粉的制备中水热法具有潜在的应用.

Synthesis and Control of the Morphology of YBO3:Eu Phosphor by Hydrothermal Method

YBO3:Eu3+phosphor with different morphologies was successfully prepared by hydrothermal process below 300℃, which is lower about 800℃ than the temperature by solid state method. The reaction conditions, such as starting materials, pH value, reaction temperature, reaction media, catalyst, etc, were investigated. The optimum reaction conditions for preparing spherical vaterite type YBO3:Eu3+ phosphor with uniform size was obtained. Under 254 nm excitation, the main emission peak appeared at 598 nm for spherical shape Y0.95Eu0.05BO3 phosphor synthesized by hydrothermal process and the photoluminescence intensity(5D0→7F1 transition) of it was higher by 50% than that prepared by solid-state reaction. These results indicate that hydrothermal process has a promising application to preparing phosphors for lamps and displays.