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Cr4+在Al2O3多晶体中的光谱性能研究

杨秋红 曾智江 徐 军 丁 君 苏良碧

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Cr4+在Al2O3多晶体中的光谱性能研究

杨秋红, 曾智江, 徐 军, 丁 君, 苏良碧

Spectroscopic characteristics of Cr4+ in transparent polycrystalline Al2O3

Yang Qiu-Hong, Zeng Zhi-Jiang, Xu Jun, Ding Jun, Su Liang-Bi
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  • 采用传统无压烧结工艺制备Cr:Al2O3透明多晶陶瓷.测定了其退火前后的吸收光谱和荧光光谱,发现在Al2O3六配位的八面体结构中,Cr4+的荧光发射也处在1100—1600nm波段的红外区间,荧光发射峰位于1223nm附近,类似Cr4+在四面体中的发光行为.同时由于氧化铝晶格常数较小,晶体场强较强,使Cr4+:Al2O3<
    Transparent polycrystalline Cr:Al2O3 ceramics were synthesized by conventional pressureless synthesis processing. The absorption and emission spectra of Cr:Al2O3 ceramics specimens before and after annealing were measured at room temperature. It was discovered that the emission spectra of Cr4+ in Al2O3 octahedral coordination site is in infrared wavelength range of 1100—1600nm. The emission peak of Cr4+ is centered at 1223nm, which is similar to that of Cr4+ in tetrahedral site. Al2O3 has smaller lattice constant, resulting in the larger crystal field strength, so there is a blue shift in the peak of Cr4+:Al2O3 ceramics compared to those of other Cr4+-doped crystals. And the emission band is much narrower with full width at half maximum Δλ 37nm.
    • 基金项目: 国家自然科学基金(批准号:60578041)资助的课题.
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出版历程
  • 收稿日期:  2005-11-29
  • 修回日期:  2006-04-21
  • 刊出日期:  2006-04-05

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