【摘要】 Er∶Lu₂O₃透明陶瓷具有高热导率、高抗热震性能、良好的光谱特性和低制备温度等优势，是实现近、中红外波段高效率、高功率激光输出的候选固态增益介质之一。针对Er∶Lu₂O₃透明陶瓷的应用激光波段，探究Er³⁺掺杂浓度对陶瓷制备和性能的影响，对实现高品质Er∶Lu₂O₃陶瓷的研制非常关键。本文以共沉淀法合成Er∶Lu₂O₃纳米粉体，采用真空预烧结合热等静压（HIP）烧结工艺制备出Er∶Lu₂O₃透明陶瓷。研究表明，1 100℃煅烧的Er∶Lu₂O₃纳米粉体物相与立方相Lu₂O₃一致，10%Er掺杂浓度（原子数分数）粉体分散性更好。经过1 500℃预烧所得的0.3%和10%（原子数分数）Er∶Lu₂O₃陶瓷的平均晶粒尺寸分别为0.86和0.87μm,相对密度分别为95.1%和96.2%。对应预烧陶瓷经过1 750℃HIP后，在2 400 nm处直线透过率分别为71.6%和78.0%（厚度2.9 mm）,其中，0.3%Er∶Lu₂O₃陶瓷残留较多气孔，在短波范围直线透过率锐降。计算了Er∶Lu₂O₃透明陶瓷的吸收和发射光谱，0.3%Er∶Lu₂O₃陶瓷在1.55μm波段具有更高的吸收、发射截面。更多还原

【Abstract】 Er∶Lu₂O₃ transparent ceramics are one of the candidate solid-state gain media for high efficiency and high power laser in the near and mid-infrared bands due to the advantages of high thermal conductivity, high thermal shock resistance, good spectral properties and low preparation temperature. Exploring the influence of Er³⁺ doping concentration（atomic number fraction） on the preparation and properties of Er∶Lu₂O₃ transparent ceramics for the related laser application is crucial for achieving high-quality Er∶Lu₂O₃ ceramics. In this paper, Er∶Lu₂O₃ transparent ceramics were fabricated using vacuum pre-sintering combined with hot isostatic pressing（HIP） post-treatment from the nano-powders synthesized by the coprecipitation method. The results show that the phases of all Er∶Lu₂O₃ nano-powders calcined at 1 100 ℃ with different Er³⁺ concentrations are almost consistent with that of the pure cubic Lu₂O₃ and the 10%Er∶Lu₂O₃ nano-powder shows better dispersibility. The average grain sizes of 0.3% and 10%Er∶Lu₂O₃ ceramics pre-sintered at 1 500 ℃ are 0.86 and 0.87 μm with the relative densities of 95.1% and 96.2%, respectively. The corresponding pre-sintered ceramics were HIP-ed at 1 750 ℃ show the in-line transmittance of 71.6% and 78.0%（thickness 2.9 mm） at 2 400 nm, respectively. Especially, the in-line transmittance of the 0.3%Er∶Lu₂O₃ ceramics sharply decreases in the short wave range due to the numerous remained residual pores. The absorption and emission spectra of 0.3% and 10%Er∶Lu₂O₃ transparent ceramics were calculated. 0.3%Er∶Lu₂O₃ ceramics possesses higher absorption and emission cross-sections around the band centered at 1.55 μm.更多还原