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Ce:SrHfO3陶瓷因具有高密度和高有效原子序数,对高能射线具有很强的阻止能力.同时,Ce:SrHfO3陶瓷还具有快衰减和高能量分辨率等优异的闪烁性能,引起了研究人员的广泛关注.由于传统的烧结方法难以实现非立方结构Ce:SrHfO3陶瓷的透明化,本研究采用真空长时烧结和短时真空预烧结合热等静压烧结(Hot Isostatic Pressing,HIP)方法制备Ce,Y:SrHfO3陶瓷.以金属氧化物和碳酸盐为原料,1200℃下煅烧8 h可以获得平均粒径为152 nm的纯相Ce,Y:SrHfO3粉体.1800℃真空烧结20 h获得平均晶粒尺寸为28.6μm的不透明的Ce,Y:SrHfO3陶瓷,而两步烧结法可以制备光学透过率良好的Ce,Y:SrHfO3陶瓷.本研究详细分析了陶瓷致密化过程中微结构的演变,探究了预烧结温度对Ce,Y:SrHfO3陶瓷密度、显微结构和光学透过率的影响.真空预烧(1500℃×2 h)结合HIP后处理(1800℃×3 h,200 MPa Ar)所获得的Ce,Y:SrHfO3陶瓷在800 nm处的最高直线透过率为21.6％,平均晶粒尺寸仅为3.4μm.在X射线激发下,Ce,Y:SrHfO3陶瓷在400 nm处产生Ce3+5d-4f发射峰,其XEL积分强度比商用锗酸铋(BGO)晶体高3.3倍,Ce,Y:SrHfO3陶瓷在1μs门宽下的光产额约为3700 ph/MeV.良好的光学和闪烁性能可以拓宽Ce,Y:SrHfO3陶瓷在闪烁探测领域的应用.“,”Ce:SrHfO3 ceramics possess a strong stopping power to high-energy rays due to their high density and high effective atomic number. However, it is difficult to obtain transparent Ce:SrHfO3 ceramics via traditional sintering method because of its orthogonal structure. In this work, Ce,Y:SrHfO3 ceramics were prepared by long-time vacuum sintering and short-time vacuum pre-sintering combined with hot isostatic pressing (HIP). The Ce,Y:SrHfO3 powders with a pure phase and a mean particle size of 152 nm were prepared by calcining at 1200 ℃ for 8 h using metal oxides and carbonates. The Ce,Y:SrHfO3 ceramics vacuum-sintered at 1800 ℃ for 20 h are opaque with an average grain size of 28.6 μm, while those prepared by the two-step sintering method show good optical transmittance. The evolution of the microstructure in the process of densification was analyzed in detail, and the influence of the pre-sintering temperature on the density, microstructure and optical transparency of Ce,Y:SrHfO3 ceramics was studied. The Ce,Y:SrHfO3 ceramics pre-sintered at 1500 ℃ for 2 h with HIP post-treatment at 1800 ℃ for 3 h have the highest in-line transmittance of 21.6％ at 800 nm with a far smaller average grain size of 3.4 μm. Under X-ray excitation, the Ce3+ 5d-4f emission of Ce,Y:SrHfO3 ceramics was observed at 400 nm, and the XEL integral intensity is 3.3 times higher than that of Bi4Ce3O12 (BGO) crystals. The light yield of the Ce,Y:SrHfO3 ceramics is approximately 3700 ph/MeV with the shaping time of 1 μs. Good optical quality and scintillation performance of Ce,Y:SrHfO3 ceramics may expand the application range and potential in the field of scintillation detection.