Fabrication of bulk Al2O3 by combustion synthesis melt-casting under ultra-high gravity
Fabrication of bulk Al2O3 by combustion synthesis melt-casting under ultra-high gravity
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DOI：
10.1016/j.jallcom.2008.09.166
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发表时间：
2009-05
影响因子：
6.2
通讯作者：
Jun Pei;Jiangtao Li;Gang Liu;Kexin Chen
中科院分区：
文献类型：
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作者：
Jun Pei;Jiangtao Li;Gang Liu;Kexin Chen
将燃烧合成技术与超高重力技术相结合，研究了一种制备块状氧化铝的简便方法。燃烧反应是在离心力作用下进行的，产生的过热熔体混合物由熔融金属(Ni)、熔融陶瓷(Al_2O_3)和气孔组成，利用它们的密度差异可以将它们分开。在重力加速度量级大于200时，成功地制备了α-Al_2O_3纯相。在重力加速度达800时，α-Al_2O_3的相对密度增加到3.70g/cm~3，结晶学分析表明，α-Al_2O_3具有良好的(110)和(211)织构。
A simple way of processing bulk Al2O3was studied by integrating the combustion synthesis technique with the ultra-high gravity technique. The combustion reaction was conducted under the centrifugal force, the produced superheating melt mixtures consisting of both molten metal (Ni), molten ceramic (Al2O3) and pores could be separated by virtue of their density difference. Pure phase of α-Al2O3was prepared successfully at the gravitational acceleration magnitude over 200. The relative density of the α-Al2O3obtained at the gravitational acceleration magnitude of 800 increased to 3.70g/cm3, the bulk α-Al2O3with well developed (110) and (211) texture was explored in terms of crystallography analysis.