【作者】 朴贤卿；

【导师】 刘景和；

【作者基本信息】 长春理工大学 ， 材料学， 2004， 硕士

【摘要】 针对单晶和玻璃作为激光工作物质的一些缺陷，本文用前驱体烧结法得到了稀土(Nd，Er)掺杂的YAG透明陶瓷，拟提供一种新的激光工作物质。我们采用尿素和碳酸盐为沉淀剂，用液相共沉淀法制备出前驱体粉末，分别在1200℃和1000℃煅烧后得到粒度均匀、性能良好的YAG多晶粉体。在1750℃的高温下烧结素坯得到透光性质良好的光学陶瓷。 本文系统地探讨了透明陶瓷的制备工艺，着重研究了液相共沉法和透明陶瓷的烧结机理，通过对前驱体的TG-DTA和XRD分析，得出了得到晶化完全且粒度适当的YAG多晶粉体的最佳煅烧温度。研究了前驱体煅烧前后的红外光谱，并对所出现的峰值进行了振动归属。测试了最后多晶陶瓷体的吸收光谱、荧光光谱以及透光率。更多还原

【Abstract】 Based on some limitations of single crystal and glasses as the laser materials, the transparent YAG ceramics co-doped with RE ions were synthesized by the precursor calcination method to provide a novel laser material. The precursor was obtained by co-precipitation method, with urea and carbonate served as precipitant. After calcined at 1200℃ and 1000℃ respectively, poly-crystalline YAG powder with even size distribution and good performances is obtained. The transmittance of final product sintered at1750℃ is about 75%.The preparation techniques of transparent ceramics, the mechanism of liquid co-precipitation and transparent ceramics calcination were discussed systemically in this paper. Trough the TG-DTA and XRD analysis, the optimum calcination temperature of precursor with complete crystallization and proper particle size was also discussed. The infrared spectra of the precursor before and after calcination were well investigated and the peaks were ascribed appropriately. The absorption spectrum, fluorescence spectrum and transmittance were measured to characterize the final product of poly-crystalline ceramics.更多还原