Microstructure and property of porous mullites with a whiskers framework obtained by a sol–gel process
Microstructure and property of porous mullites with a whiskers framework obtained by a sol–gel process
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溶胶-凝胶法晶须骨架多孔莫来石的微观结构与性能
DOI：
10.1016/j.ceramint.2016.04.043
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发表时间：
2016-07
影响因子：
5.2
通讯作者：
Xiaolin Zhang
中科院分区：
文献类型：
--
作者：
Haihong Zhang;Jianfeng Yang;Bo Wang;Xiaolin Zhang
以SiO2溶胶、Al 2 O3和AlF 3粉末为反应催化剂，通过溶胶-凝胶转变成型的气凝胶块体，在密闭容器中反应烧结（1100 ~ 1600 °C，1 h），制备了具有晶须骨架和高孔隙率的多孔莫来石。通过XRD、SEM和压缩试验研究了加热温度对多孔莫来石的孔隙率、晶须形成、显微结构特征和抗压强度的影响。结果表明，在1100 ~ 1600 °C加热后，莫来石的孔隙率在84.1- 80.2%之间变化。由于气固反应速率的加快，晶须在骨架中相互搭接，形成较大的空间，并在高温下变得细长光滑。晶须骨架在1600 °C加热时的最大抗压强度为16.1 MPa，这是由于晶须之间的结合力很强。
Porous mullites with a whiskers framework and high porosities were fabricated by the reaction sintering (1100 to 1600 °C, 1 h, in an airtight container) of an aerogel block shaped by the sol–gel transition of a mullite precursor composed of SiO2sol, Al2O3and AlF3powders (as reaction catalyst). The effect of heating temperatures on porosity, whisker formation, microstructure feature and compressive strength of the porous mullites was determined by XRD, SEM and compressive test. The results indicate that after heating at temperatures from 1100 to 1600 °C, the porosities of the mullites varied within the range of 84.1–80.2%. The whiskers in the framework well lap-jointed each other to form the large space and became elongated and smooth at high temperatures due to the accelerated vapor–solid reaction rate. A maximum compressive strength of 16.1 MPa was obtained for the whiskers framework heated at 1600 °C; this strength was attributed to the strong bonding among the smooth whiskers.
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影响因子：
6.2
作者：
Linfeng Xu;Xiuan Xi;Wenli Zhu;Anze Shui;W. Dai
通讯作者：
Linfeng Xu;Xiuan Xi;Wenli Zhu;Anze Shui;W. Dai
DOI：
10.1111/j.1744-7402.2005.02045.x
发表时间：
2005-11
影响因子：
2.1
作者：
A. Pyzik;Cheng G. Li
通讯作者：
A. Pyzik;Cheng G. Li
影响因子：
3.9
作者：
J. R. Moyer
通讯作者：
J. R. Moyer
DOI：
10.1016/j.jeurceramsoc.2013.02.018
发表时间：
2013-09-01
影响因子：
5.7
作者：
Guo, Xingzhong;Li, Wenyan;Yang, Hui
通讯作者：
Yang, Hui
影响因子：
5.2
作者：
Linfeng Xu;Xiuan Xi;Anze Shui;Wenli Zhu
通讯作者：
Linfeng Xu;Xiuan Xi;Anze Shui;Wenli Zhu