Phase evolution of yttrium aluminium garnet (YAG) in a citrate–nitrate gel combustion process
Phase evolution of yttrium aluminium garnet (YAG) in a citrate–nitrate gel combustion process
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DOI：
10.1039/b316434a
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发表时间：
2004-04
影响因子：
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通讯作者：
Xianzhong Guo;P. Devi;B. Ravi;J. Parise;S. Sampath;J. Hanson
中科院分区：
文献类型：
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作者：
Xianzhong Guo;P. Devi;B. Ravi;J. Parise;S. Sampath;J. Hanson
采用柠檬酸-硝酸盐凝胶燃烧法合成了钇铝石榴石（YAG）粉体。采用热重分析（TG）、差热分析（DTA）、X射线粉末衍射（XRD）和时间分辨X射线粉末衍射实验研究了相的演变。纯YAG相的形成取决于燃烧过程中前驱体分解的程度。从起始前体粉末中除去未分解的柠檬酸有助于降低YAG相开始形成的温度和获得纯的高度结晶的YAG相的温度。前驱体凝胶中柠檬酸盐与硝酸盐的比例影响YAG的相演变。
Yttrium aluminium garnet (YAG) powders were synthesized by a citrate–nitrate gel combustion process. Thermogravimetry (TG), differential thermal analysis (DTA), X-ray powder diffraction (XRD), and time-resolved X-ray powder diffraction experiments were used to study the phase evolution. Formation of the pure YAG phase depends on the level of precursor decomposition in the combustion process. Removal of undecomposed citric acid from the starting precursor powder helps to lower the temperature at which the YAG phase begins to form and the temperature at which the pure, highly crystalline YAG phase is obtained. The value of citrate to nitrate ratio in the precursor gel affects the phase evolution for YAG.