Fabrication and microstructure of cerium doped lutetium aluminum garnet (Ce:LuAG) transparent ceramics by solid-state reaction method
Fabrication and microstructure of cerium doped lutetium aluminum garnet (Ce:LuAG) transparent ceramics by solid-state reaction method
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DOI：
10.1016/j.materresbull.2014.04.029
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发表时间：
2014-07
影响因子：
5.4
通讯作者：
Junlang Li;Jian Xu;Ying Shi;Hong Qi;Jianjun Xie;F. Lei
中科院分区：
文献类型：
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作者：
Junlang Li;Jian Xu;Ying Shi;Hong Qi;Jianjun Xie;F. Lei
以合成的纳米级Lu 2 O3、商品α-Al 2 O3和CeO 2为原料，采用一步固相反应法制备了Ce 3+掺杂的多晶镥铝石榴石（Ce：LuAG）透明陶瓷。混合粉末成型的绿色压坯在1750 °C真空烧结10 h后成功致密化为Ce：LuAG透明陶瓷。用自制的Lu 2 O3粉体制备的Ce：LuAG陶瓷在550 nm处的在线光学透过率可达57.48%，高于用商品Lu 2 O3粉体制备的陶瓷的在线光学透过率（22.96%）。显微结构观察表明，Ce：LuAG陶瓷中的微孔、铝偏析和折射率不均匀性引起的光散射中心是导致其光学透过率降低的主要原因，应在后续工作中予以去除和优化。
Polycrystalline Ce3+doped lutetium aluminum garnet (Ce:LuAG) transparent ceramics fabricated by one step solid-state reaction method using synthetic nano-sized Lu2O3, commercial α-Al2O3and CeO2powders were investigated in this paper. The green compacts shaped by the mixed powders were successfully densified into Ce:LuAG transparent ceramics after vacuum sintering at 1750 °C for 10 h. The in-line optical transmittance of the Ce:LuAG ceramic made by home-made Lu2O3powders could reach 57.48% at 550 nm, which was higher than that of the ceramic made by commercial Lu2O3powders (22.96%). The microstructure observation showed that light scattering centers caused by micro-pores, aluminum segregation and refraction index inhomogeneities induced the decrease of optical transparency of the Ce:LuAG ceramics, which should be removed and optimized in the future work.