Er^(3+)掺杂SiO_2复合的Al_2O_3粉末结构及光致发光特性  

Structure and photoluminescence of Er^(3+)-doped Al_2O_3 composite powders by mixing with SiO_2

作　　者：朱振华[1] 雷明凯[1] 

机构地区：[1]大连理工大学材料科学与工程学院表面工程研究室,大连116024

出　　处：《物理学报》2006年第9期4956-4961,共6页Acta Physica Sinica

基　　金：教育部科学研究重点项目(批准号:01052)资助的课题.~~

摘　　要：采用溶胶_凝胶(sol_gel)工艺制备0.1mol%Er3+掺杂Al2O3体系和SiO2_Al2O3复合体系粉末.实验结果表明5mol%的SiO2复合加入Al2O3抑制γ→θ和θ→α相转变.掺0.1mol%Er3+Al2O3体系粉末,900℃烧结,在1.47—1.63μm波段内光致发光(PL)谱为中心波长1.53μm、半高宽56nm的单一宽峰,1000—1200℃烧结,劈裂为多峰PL谱.掺0.1mol%Er3+SiO2_Al2O3复合体系粉末,在高达1200℃烧结,仍保持中心波长1.53μm的单一宽峰PL谱,由于—OH更完全的脱除,PL强度较900℃烧结Al2O3体系,SiO2_Al2O3复合体系均提高1个数量级.The 0.1 mol% Er^3＋ -doped Al2O3 and SiO2-Al2O3 powders have been prepared by the sol-gel method. The results show that the addition of 5 mol% SiO2 into the Er^3＋ -doped Al2O3 suppresses the phase transitions of γ→θ and θ→α. For the 0.1 mol% Er^3＋ -doped Al2O3 powders at the sintered at temperature of 900℃, the broadband photoluminescence （PL） spectrum centered at 1.53 μm in the range from 1.47μm to 1.63 μm was obtained with the full width at half maximum of 56 nm, and the splitted PL spectra appeared for powders sintered at 1000-1200℃. For the 0.1 mol% Er^3＋ -doped Al2O3-SiO2 powders, the PL spectrum has a single broadband centered at 1.53 μm even when the sintering temperature is as high as 1200℃, and the PL intensity increases by one order of magnitude, because --OH group in the Al2O3-SiO2 powders has been removed completely, compared with that in the Al2O3 powders with and without mixing of SiO2 sintered at the temperature of 900℃ .

关 键 词：SIO2-AL2O3 复合体系 掺铒 溶胶-凝胶工艺 光致发光 

分 类 号：O482.31[理学—固体物理]