采用共沉淀法合成5at%Yb∶CaF2纳米粉体。该粉体为纯立方CaF2相，平均颗粒尺寸为45 nm。Yb∶CaF2纳米粉体呈立方体状，具有较好的分散性。通过真空预烧结合热等静压烧结(HIP)后处理制备5at%Yb∶CaF2透明陶瓷，研究了真空预烧温度对陶瓷物相、致密度、显微结构及光学透过率的影响。结果表明，不同温度真空预烧的陶瓷均为纯立方相，在650 ℃真空预烧的5at%Yb∶CaF2陶瓷经HIP 处理后具有最好的光学质量，其在1 200 nm处的直线透过率达到87%(厚度为3 mm)。

5at%Yb∶CaF2 nano powders were synthesized by the co-precipitation method. The powder is pure cubic CaF2 phase and the average particle size was about 45 nm. Meanwhile, the Yb∶CaF2 nano powders are well-distributed and the shape of small particles is close to cubic. 5at%Yb∶CaF2 transparent ceramics were fabricated by vacuum sintering combined with hot isostatic pressing (HIP) post-treatment. The influences of vacuum pre-sintering temperature on the phase, densification, microstructure and optical transmission of the ceramics were studied. The results show that all the ceramics pre-sintered in vacuum at different temperatures are still pure cubic phase. After HIP post-treatment, 5at%Yb∶CaF2 ceramics with the thickness of 3 mm pre-sintered at 650 ℃ under vacuum have the best optical quality and the in-line transmittance reaches 87% at 1 200 nm.