Nanostructured Yb:GGG polycrystalline powders via gel combustion method
来源期刊：Journal of Rare Earths2009年第3期
论文作者：黄德馨 张学建 刘景和 张丹
文章页码：402 - 405
摘 要：Gadolinium gallium garnet（GGG） nanopowders doped with ytterbium ions（Yb:GGG） were synthesized with citric acid as a fuel via gel combustion method. The optimized conditions for preparing Yb3+:Gd3Ga5O12 nanopowders were discussed. The heat behavior,structure and morphology of powders were analyzed with thermal analysis（TG-DTA） ,X-ray diffraction（XRD） ,infrared spectra（IR） and transmission electron microscope（TEM） . TG-DTA analysis revealed that the weight loss of the precursor occured below 800 °C and its crystallization temperature was 830.6 °C. XRD and IR analysis showed that the precursor converted directly into pure GGG at a relatively lower temperature（900 °C） without any other intermediate phase. The lattice constant was 1.2377 calculated by extrapolation method. TEM results indicated that the spherical powders showed good dispersity and had a relatively narrow size distribution with average particle size of approximately 40-50 nm,which was favorable for good sinterability of Yb:GGG laser ceramic.
黄德馨1,2，张学建1,2，刘景和1，张丹1
1. Department of Materials Science and Engineering,Changchun University of Science and Technology2. Department of Materials Science and Engineering,Jilin Architectural and Civil Engineering Institute
摘 要：Gadolinium gallium garnet（GGG） nanopowders doped with ytterbium ions（Yb:GGG） were synthesized with citric acid as a fuel via gel combustion method. The optimized conditions for preparing Yb3+:Gd3Ga5O12 nanopowders were discussed. The heat behavior,structure and morphology of powders were analyzed with thermal analysis（TG-DTA） ,X-ray diffraction（XRD） ,infrared spectra（IR） and transmission electron microscope（TEM） . TG-DTA analysis revealed that the weight loss of the precursor occured below 800 °C and its crystallization temperature was 830.6 °C. XRD and IR analysis showed that the precursor converted directly into pure GGG at a relatively lower temperature（900 °C） without any other intermediate phase. The lattice constant was 1.2377 calculated by extrapolation method. TEM results indicated that the spherical powders showed good dispersity and had a relatively narrow size distribution with average particle size of approximately 40-50 nm,which was favorable for good sinterability of Yb:GGG laser ceramic.
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