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Cr⁴⁺在Al₂O₃透明陶瓷中的发光行为

Fluorescence Characteristics of Cr⁴⁺ in Transparent Al₂O₃ Ceramics

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【Author】 YANG Qiu-hong~1,ZENG Zhi-jiang~1,XU Jun~2,ZHANG Hong-wei~1,SU Liangbi~2(1.School of Materials Science and Engineering,Shanghai University,Shanghai 200072,China;2.Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences, Shanghai 201800,China)

【机构】上海大学材料科学与工程学院；中国科学院上海光学精密机械研究所；中国科学院上海光学精密机械研究所上海200072；上海200072；上海201800；

【摘要】采用传统无压烧结工艺制备出透明性良好的掺Cr的A l2O3透明陶瓷;测定了其吸收光谱和荧光光谱,发现在A l2O3六配位的八面体结构中,除了有Cr3+离子的特征吸收峰外,由于有Mg2+的电荷补偿作用,也有Cr4+离子,Cr4+的荧光发射峰位于1223nm附近,与Cr4+在四面体中的发光行为一致。但其荧光发射峰较窄,半高宽Δλ仅为37nm。更多还原

【Abstract】 Transparent polycrystalline Cr-doped Al₂O₃ ceramics were fabricated by conventional solid-state pressureless processing.The absorption and emission spectra of Cr-doped Al₂O₃ ceramics were measured.It was first discovered there exist the fluorescence spectra of Cr⁴⁺ in the octahedral site of Al₂O₃ because of the charge compensation of Mg²⁺ except for the typical absorption peak of Cr³⁺.The peak of the emission is at the wavelength 1223nm,which is similar to those of Cr⁴⁺ in the tetrahedral site.The bandwidth of emission peak is very narrow,and FWMH Δλ is only 37nm.更多还原