Zhou, Lihua and Chen, Daqin and Luo, Wenqin and Wang, Yuansheng and Yu, Yunlong and Liu, Feng (2007) Transparent glass ceramic containing Er3+:CaF2 nano-crystals prepared by sol-gel method. Materials Letters, 61 (18). 3988 - 3990.
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Official URL: http://www.sciencedirect.com/science/article/B6TX9...
Er3+ doped SiO2–CaF2 transparent glass ceramic was prepared by sol–gel method. The microstructural evolution of the samples was studied with X-ray diffraction (XRD), transmission electron microscopy (TEM), and infrared spectra (IR). After heat-treatment at 900 °C, the Si–OH bonds and other organic groups were basically eliminated. The CaF2 crystallites in the sample heat-treated at 900 °C are 10–20 nm in size, distributed homogeneously among the amorphous silica matrix. The efficient upconversion emission for Er3+.4F9/2 → 4I15/2 transition was recorded under 980 nm excitation, which could be ascribed to the incorporation of Er3+ ions into the CaF2 nano-crystals with low phonon energy.
|Uncontrolled Keywords:||Glass ceramic; Sol–gel; CaF2 nano-crystals; Upconversion|
|Subjects:||Material Science > Nanofabrication processes and tools|
Material Science > Nanostructured materials
|Deposited On:||09 Feb 2010 12:29|
|Last Modified:||09 Feb 2010 12:29|
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