Cordierite synthesis. A time-resolved neutron diffraction study
Cordierite synthesis. A time-resolved neutron diffraction study
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DOI：
10.1016/j.jeurceramsoc.2011.09.010
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发表时间：
2011-10
影响因子：
5.7
通讯作者：
J. M. Benito;X. Turrillas;G. Cuello;A. H. Aza;S. Aza;M. A. Rodríguez
中科院分区：
文献类型：
--
作者：
J. M. Benito;X. Turrillas;G. Cuello;A. H. Aza;S. Aza;M. A. Rodríguez
为了阐明堇青石合成过程中的反应机理，通过X射线衍射和中子热衍射进行了动力学研究。因此，可以阐明导致堇青石合成的反应和在该过程中产生不期望的相的反应。根据所使用的反应物，这些反应是不同的。本文介绍了以滑石、高岭土和水菱镁矿作为反应物合成堇青石过程中获得的结果。这种天然原料的合成是通过已描述的复杂机制进行的。在这种合成中，在整个过程结束时，获得的堇青石总是伴随着第二相：尖晶石。这是首次在非亚微米天然原料固态合成时观察到μ-堇青石相的存在。
In order to elucidate the mechanism of reaction during the cordierite synthesis a kinetic study has been carried out by means of X-ray diffraction and neutron thermo-diffraction. It was thus possible to elucidate between the reactions leading to the cordierite synthesis and those that gave rise to the undesired phases generated during this process. Depending on the reactants used these reactions are different. The present paper presents results obtained during the cordierite synthesis starting from talc, kaolin and hydromagnesite as reactants. This synthesis from natural raw materials takes place through a complex mechanism that has been described. In this kind of synthesis, at the end of the entire process the obtained cordierite is always accompanied by a second phase: spinel. This is the first time that the presence of the μ-cordierite phase has been observed when the synthesis is carried out in solid state from non-submicronic natural raw materials.