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动态真空条件下快速合成β-SiC的研究 被引量：1

Research on rapid synthesis of β-SiC under dynamic vacuum condition
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摘要 以淀粉(经85℃糊化)为碳源,正硅酸乙酯(TEOS)为硅源,通过溶胶-凝胶法制备了淀粉-SiO2混合凝胶,将混合干凝胶在动态真空条件下进行碳热还原制备碳化硅(SiC)。用TGA、XRD、SEM及N2低温物理吸附等手段对淀粉-SiO2混合凝胶和碳热还原产物进行表征。结果表明,在950℃动态真空条件下即可合成出晶粒尺寸约为50nm,结晶度较高的β-SiC。 Starch, prepared by heating starch suspension at 85℃, and tetraethoxysilane （TEOS） have been allowed for a sol-gel reaction to prepare starch-SiO2 hybrids gel. The SiC was synthesized via carbothermal reduction of dried starch-SiO2 hybrids gel. Dried starch-SiO2 hybrids gel and as-prepared products were characterized by TGA, XRD, SEM and low temperature N2 adsorption-desorption measurement. The results showed that high crystalline B-SiC with average crystalline size of 50 nm could be synthesized at 950℃ under dynamic vacuum condition.
作者 于伟鹏 郑瑛 郑勇 魏可镁
机构地区 福建师范大学化学与材料学院 福州大学化肥催化剂国家工程研究中心
出处 《功能材料》 EI CAS CSCD 北大核心 2008年第10期1700-1702,共3页 Journal of Functional Materials
基金 国家自然科学基金资助项目(20576021) 福建省自然科学基金计划资助项目(E0710004)
关键词 淀粉 溶胶-凝胶 碳热还原 Β-SIC 真空 starch； sol-gel ； carbothermal reduction ；β-SiC； vacuum
分类号 O612.4 [理学—无机化学]
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参考文献23

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二级参考文献26

共引文献20

同被引文献15

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功能材料
2008年 第10期

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