Monolithic luminescent glass‐ceramic (GC) embedded with fluoride‐based nanocrystals (NCs) has drawn much attention as it is stable and possesses long fluorescent lifetime, while only small partial of optically active ions could enter the fluoride NCs prepared by conventional crystallization process. In this work, YF₃:Eu³⁺ embedded GCs have been controllably synthesized by Spark Plasma Sintering at a relatively low sintering temperature (960°C) within 10 minutes. The GC samples show typical sharp reddish‐orange emissions peaking at λ = 590 nm and 620 nm, which can be ascribed to the ⁵D₀ → ⁷F_j transitions of Eu³⁺ located in the tetrahedral coordination sites of the YF₃ NCs. Significantly, a small R/O ratio (photoluminescence intensity ratio of ⁵D₀ → ⁷F₂/⁵D₀ → ⁷F₁) suggests that majority of Eu³⁺ ions are well preserved in YF₃ NCs, which is confirmed by the EDS and TEM results that highly crystallized YF₃:Eu³⁺ NCs are homogeneously dispersed into the silica glass matrix without interfacial reaction. Hence, the lifetime of GC sample is prolonged to 6.8 ms These results demonstrate that Eu³⁺ could be well protected and resided in YF₃ low phonon crystal by this method to fabricate GC composites with high optical performance.

中文翻译：

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含YF3：Eu3 +纳米晶体的玻璃陶瓷的可控合成：保存良好的Eu并延长寿命

嵌入有氟化物基纳米晶体（NCs）的单片发光玻璃陶瓷（GC）稳定且具有较长的荧光寿命，而光学活性离子中只有一小部分可以进入通过常规结晶过程制备的氟化物NCs，因此备受关注。在这项工作中，YF ₃：Eu ³⁺嵌入式GC已通过火花等离子体烧结在10分钟内以较低的烧结温度（960°C）可控制地合成。GC样品显示出典型的尖锐的红橙色发射峰，位于λ  = 590 nm和620 nm处，可归因于Eu ³⁺的⁵ D ₀  →  ⁷ F _j跃迁位于YF ₃ NC的四面体协调位置。显著，小R / O比（光致发光强度比⁵ d ₀  →  ⁷ ˚F ₂ / ⁵ d ₀  →  ⁷ ˚F ₁）表明，大多数的Eu ³⁺离子被完好地保存在YF ₃ NCS，它是由确认EDS和TEM结果表明，高度结晶的YF ₃：Eu ³⁺ NCs均匀分散在二氧化硅玻璃基质中，而没有界面反应。因此，GC样品的寿命延长到6.8 ms。这些结果表明Eu ³⁺该方法可以很好地保护并保留在YF ₃低声子晶体中，从而制备出具有高光学性能的GC复合材料。