We investigated the photoluminescence (PL) properties of 3 mol%Y₂O₃-ZrO₂ (3YSZ) polycrystals. The 3YSZ polycrystals were prepared by an isothermal flash sintering technique in which an alternating electric field was applied at a predetermined furnace temperature. After flash sintering, clear, visibly blue PL at 2.82 eV (440 nm) was confirmed under an ultraviolet light (3.4 eV (365 nm)); however, no visible PL was observed from 3YSZ polycrystals conventionally sintered using the same raw powders. Thus, the emission of blue PL was induced by the electric field applied during sintering. The obtained PL band was related to excitation at 3.87 eV (320 nm), which is possibly assigned to the singly ionized associated oxygen vacancy defects (AOD + centers). Furthermore, the blue emission was stable after high temperature annealing at 1400 °C for 1 h in air. We possibly attribute the emission of this PL to the stabilization of AOD + centers by the electric field loading during flash sintering.

我们研究了3 mol％Y ₂ O ₃ -ZrO ₂的光致发光（PL）特性（3YSZ）多晶。通过等温快速烧结技术制备3YSZ多晶体，其中在预定的炉温下施加交变电场。闪蒸烧结后，在紫外光（3.4 eV（365 nm））下，在2.82 eV（440 nm）处观察到清晰可见的蓝色PL。然而，从常规使用相同原料粉末烧结的3YSZ多晶体中未观察到可见的PL。因此，蓝色PL的发射是由烧结过程中施加的电场引起的。获得的PL带与在3.87 eV（320 nm）处的激发有关，这可能与单个离子化的相关氧空位缺陷（AOD +中心）有关。此外，在空气中在1400°C高温退火1小时后，蓝色发射稳定。