| 熔盐法合成莫来石晶须 |
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| 引用本文： | 聂建华,张寒,徐满,晏强,梁永和.熔盐法合成莫来石晶须[J].稀有金属材料与工程,2009,38(Z2). |
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| 作者姓名： | 聂建华 张寒 徐满 晏强 梁永和 |
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| 作者单位： | 武汉科技大学,湖北省耐火材料与高温陶瓷重点实验室省部共建国家实验室培育基地,湖北,武汉,430081 |
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| 摘 要： | 以Al_2(SO_4)_3·18H_2O和SiO_2为反应原料,在Na_2SO_4熔盐中于不同的温度下(700, 800, 900, 1000, 1100和1200 ℃)合成了莫来石晶须,利用XRD、SEM、FESEM和TEM等手段对合成粉体的相组成和形貌进行了表征.结果表明:合成的莫来石粉体由纳米尺度的束状莫来石晶须组成;晶须直径为50～200 nm,长度为5～10 μm;熔盐法合成莫来石晶须的最佳温度为1000 ℃.还对莫来石晶须的形成机理进行了探讨.
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| 关 键 词： | 熔盐 莫来石 晶须 |
Synthesis of Mullite Whiskers Using Molten Salt Method |
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| Nie Jianhua,Zhang Han,Xu Man,Yan Qiang,Liang Yonghe.Synthesis of Mullite Whiskers Using Molten Salt Method[J].Rare Metal Materials and Engineering,2009,38(Z2). |
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| Authors: | Nie Jianhua Zhang Han Xu Man Yan Qiang Liang Yonghe |
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| Affiliation: | Nie Jianhua,Zhang Han,Xu Man,Yan Qiang,Liang Yonghe (Hubei Province Key Laboratory of Refractories , Ceramics-Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory,Wuhan University of Science , Technology,Wuhan 430081,China) |
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| Abstract: | The mullite whiskers were prepared through reaction of aluminum sulfate and silica in molten sodium sulphate media at different reaction temperatures (700, 800, 900, 1000, 1100 and 1200 ℃). The phase composition and microstructure of the mullite powder were analyzed by XRD, SEM, FESEM and TEM. Results show that the synthesized mullite powder is composed of mullite whiskers in nano-scale. Mullite whiskers are 50～200 nm in diameter and 5～10 μm in length. The optimized synthesizing temperature of mullite whisker in molten salt medium is about 1000 ℃ for 3 h. Meanwhile, the growth mechanism of mullite whisker was discussed. |
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| Keywords: | molten salt mullite whisker |
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