| 溶胶—凝胶方法合成KTa0.65Nb0.35O3的凝胶化和热处理研究 |
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| 引用本文： | 卢朝靖,王世敏.溶胶—凝胶方法合成KTa0.65Nb0.35O3的凝胶化和热处理研究[J].硅酸盐通报,1994,13(5):4-8. |
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| 作者姓名： | 卢朝靖 王世敏 |
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| 作者单位： | 湖北大学物理系
(卢朝靖，王世敏，赵建洪，黄桂玉)，湖北大学物理系(邝安祥) |
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| 基金项目： | 国家863高科技计划资助 |
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| 摘 要： | 本文研究了用溶胶－凝胶方法制备了ＫＴａ０．６５Ｎｂ０．３５Ｏ３超细粉末的凝胶化和热处理行为。探讨了影响溶胶凝胶形成的主要因素，包括水解水量，溶液浓度、催化剂的作用和环境温度。通过ＤＴＡ和ＸＲＤ分析对干凝胶在热处理过程中的结构转变进行了研究。同时，详细报道了组成为ＫＴａ０．６５Ｎｂ０．３５Ｏ３的焦绿石相和钙钛矿相的Ｘ射线粉末衍射数据。
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| 关 键 词： | 溶胶－凝胶法 水解 缩聚 热处理 KTaNb 超细粉 |
Study on the Gelation and Heat-treatment of KTa_(0.65)Nb_(0.35)O_3 Prepared by Sol - Gel Process |
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| Lu Chaojing Wang Shiming Zhao JianhongHuang Guiyu Kuang Anxiang.Study on the Gelation and Heat-treatment of KTa_(0.65)Nb_(0.35)O_3 Prepared by Sol - Gel Process[J].Bulletin of the Chinese Ceramic Society,1994,13(5):4-8. |
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| Authors: | Lu Chaojing Wang Shiming Zhao JianhongHuang Guiyu Kuang Anxiang |
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| Abstract: | The gelation and heat- treatment of KTa0.65Nb0.35O3 synthesized by sol -gel process have been studied. The gels were prepared by adding an aqueous acetic aicd solution to a K-Ta - Nb complex alkoxide. A systematic discussion is made to examine the effects of process parameters such as amounts of water,molarity of alkoxide solution ,amount of acid,and temperature on the gelation time as well as on the appearance of the gels obtained. The structure change of dried gel on heat -treatment is studied by DTA and XRD analysis. In the meantime,the detailed X -ray diffraction data of pyrochlore and perovskite phases for KTa0.65Nb0.35O3 powders are reported for the first time. |
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| Keywords: | KTa0 65Nb0 35sO3 sol - gel hydrolysis - condensation heat - treatment |
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