| 液相先驱体转化结合溶胶凝胶法合成ZrC-SiC纳米复合粉体 |
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| 引用本文： | 廉晓庆,隆万坤,徐菊花,贾瑞强,彭龙贵.液相先驱体转化结合溶胶凝胶法合成ZrC-SiC纳米复合粉体[J].硅酸盐通报,2018,37(1):195-199. |
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| 作者姓名： | 廉晓庆 隆万坤 徐菊花 贾瑞强 彭龙贵 |
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| 作者单位： | 西安科技大学材料科学与工程学院,西安,710054 |
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| 基金项目： | 陕西省自然科学基础研究计划一般项目(青年)(2017JQ5100)%西安科技大学博士启动金(2015QDJ014)%西安科技大学培育基金(2014002) |
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| 摘 要： | 以八水合氧氯化锆为锆源、正硅酸乙酯为硅源、蔗糖为碳源,采用液相先驱体转化结合溶胶凝胶法合成ZrC-SiC纳米复合粉体.借助傅立叶红外光谱仪分析了有机锆先驱体的官能团,借助X射线衍射仪和扫描电子显微镜研究了Si/Zr摩尔比对复合粉体物相组成与显微形貌的影响.研究表明:有机锆先驱体具有链状或网状结构;1450℃烧成并保温2 h,Si/Zr摩尔比0.28时复合粉体中仍存在未反应的m-ZrO2相,Si/Zr摩尔比增加至1.11、2.56、5.88、23.17时均合成了纯相ZrC-SiC纳米复合粉体;随着Si/Zr摩尔比的增加,复合粉体粒径变化不大;Si/Zr摩尔比为2.56时平均粒径仅90 nm,且元素分布均匀.
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| 关 键 词： | 液相先驱体转化法 溶胶凝胶法 ZrC SiC 纳米粉体 |
Syntheses of ZrC-SiC Nano-composite Powders via Liquid Precursor Conversion and Sol-Gel Method |
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| LIAN Xiao-qing,LONG Wan-kun,XU Ju-hua,JIA Rui-qiang,PENG Long-gui.Syntheses of ZrC-SiC Nano-composite Powders via Liquid Precursor Conversion and Sol-Gel Method[J].Bulletin of the Chinese Ceramic Society,2018,37(1):195-199. |
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| Authors: | LIAN Xiao-qing LONG Wan-kun XU Ju-hua JIA Rui-qiang PENG Long-gui |
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| Abstract: | ZrC-SiC nano-composite powders were synthesized via liquid precursor conversion and sol-gel method,using zirconium oxychloride octahydrate as zirconium source, tetraethoxysilance as silica source and sucrose as carbon source.Functional groups of zirconium-containing polymer precursor were analyzed by fourier transform infrared spectrometer.Effects of Si/Zr molar radio on phase composition and microstructure of samples were investigated by X-ray diffractometer and scanning electronic microscopy, respectively.It is shown that the zirconium-containing polymer precursor has a chain-like or network-like structure.After sinterd at 1450℃for 2 h,there is still unreactive m-ZrO2phase in the sample whose Si/Zr molar radio is 0.28.When Si/Zr molar radio increases to 1.11,2.56,5.88 and 23.17,nearly pure ZrC-SiC nano-composite powders can be synthesized.The powder size changes little with the increasing of Si/Zr molar ratio.Composite powders with an average particle size of 90 nm and evenly elements distribution are obtained when Si/Zr molar ratio is 2.56. |
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| Keywords: | liquid precursor conversion method sol-gel method ZrC SiC nano-powder |
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