Ce：Lu2SiO5闪烁陶瓷的放电等离子烧结与发光性能

Spark Plasma Sintering of Ce^(3+):Lu_2SiO_5 Scintillation Ceramics and Its Luminescent Characteristics

以亚微米级单相铈离子掺杂硅酸镥(Ce:Lu2SiO5,LSO)发光粉体为原料,采用放电等离子烧结(Spark Plasma Sintering)技术対多晶LSO闪烁陶瓷的制备方法进行了探索,同时对其发光性能进行了研究.在(1350℃/5min)的条件下实现了LSO粉体的快速致密化烧结,研制出了具有良好发光性能的半透明多晶LSO闪烁陶瓷,其相对密度达到理论密度的99.5%.在360nm紫外激发条件下,呈现位于380～600nm的宽峰发射行为.其相对发光强度达到LSO闪烁单晶的75%,发光衰减时间仅为9.67ns.该材料有望成为一种新型的高光输出、快衰减多晶闪烁材料.

Cerium-doped lutetium orthosilicate（Ce：Lu2SiO5,LSO） scintillation ceramics were fabricated by using spark plasma sintering（SPS） technique starting from synthesized submicron polycrystalline LSO luminescent pow-der.Polycrystalline translucent LSO ceramics were rapidly densified under optimized sintering conditions of 1350℃/5min.The relative density of obtained translucent LSO ceramic reached 99.5% theoretically.Under excita-tion of 360nm,a broad emission peak was detected in the wavelength range of 380nm to 600nm.The relative emis-sion intensity of obtained LSO ceramic attained 75% of LSO single crystal scintillator.The luminescent decay time was measured to be only 9.67ns.The good luminescent characteristics make LSO polycrystalline ceramic a prom-ising scintillator candidate for radiation detection in future.