Microstructural control of porous Al2TiO5 by using potato starch as pore-forming agent
Microstructural control of porous Al2TiO5 by using potato starch as pore-forming agent
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DOI：
10.2109/jcersj2.121.730
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发表时间：
2013-08
影响因子：
1.1
通讯作者：
H. Nishijima;R. Maki;Yoshikazu Suzuki
中科院分区：
文献类型：
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作者：
H. Nishijima;R. Maki;Yoshikazu Suzuki
在这项研究中，我们尝试了制备多孔Al 2 TiO 5陶瓷与马铃薯淀粉作为造孔剂在相对较低的烧结温度下，反应烧结法使用细晶原料。在行星式球磨机中，将i-Al 2 O3粉末（0.1 μ m）和TiO 2金红石粉末（2 μ m）在乙醇中湿球磨2小时。将混合粉末与5 ~ 30wt%的马铃薯淀粉粉末在具有乙醇的玛瑙研钵中共混。将不含粘合剂的绿色样品在空气中在1300 - 1500°C下烧结2小时。该样品包含较细的闭孔（<1 m）以及较大的孔（5 μ m ~ 80 m）。这种微细结构的形成可以解释为：（1）马铃薯淀粉燃烧产生的局部加热效应;（2）水蒸气辅助效应。
In this study, we have tried to prepare porous Al2TiO5 ceramics with potato starch as a pore-forming agent at relatively low sintering temperatures by reactive sintering method using fine-grained starting materials. i-Al2O3 powder (0.1 m) and TiO2 rutile powder (2 m) were wet-ball milled in ethanol for 2 h in a planetary ball-mill. The mixed powder was blended with 5 30wt% of potato starch powder in an agate mortar with ethanol. Green samples with no binder were sintered at 13001500°C for 2 h in air. The sample contained finer closed pores (<1 m) as well as the larger pores (580 m). The finer microstructure formation can be explained by (1) the local heating effect via the combustion of potato starch, and (2) water vapor-assisted effect.