微量钛掺杂的纳米二氧化锆相变过程中的光学性质

微量钛掺杂的纳米氧化锆由于纳米“小尺寸效应”的影响，在材料中产生了过量的氧空位缺陷，这些氧空位缺陷使得氧化锆在室温下呈现出高温的四方相。这种晶相的变化对氧化锆的光学性质产生了很大的影响。在氧化锆从四方相向单斜相的转变过程中，位于470 nm位置的Ti发光中心的宽带发光以及相同位置的余辉发光得到了增强。

Influence of Phase Transition on Photoluminescence Properties of Trace Ti Doped Nano-zirconia

Trace Ti doped nano-zirconia was prepared via the one-pot reaction, and its phase transition and luminescence properties were characterized. It is believed that generation of excess oxygen vacancies within the trace Ti doped ZrO₂ nanocrystalline is primarily responsible for the room temperature tetragonal phase stabilization below a critical size. Luminescent properties of ZrO₂ are greatly affected by the oxygen vacancies in the phase transition process, leading to the enhancement of the 470 nm phosphorescence and the identical color long afterglow.