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Oriented growth of mullite from a glass melt using electrochemical nucleation |
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| Institution: | 1. Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Inner Mongolia 014010,China;2. School of Physics, Inner Mongolia University of Science &Technology, Baotou, 014010, China;3. Institute of Mining Engineering, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia, 014010, China |
| Abstract: | A dc-potential of 1.5 V between a platinum wire and a platinum crucible containing a magnesia–titania alumosilicate melt is sufficient to cause nucleation and subsequent crystal growth of mullite at the cathode at a temperature high enough to prevent nucleation under normal conditions. This crystal growth is fast in the crystallographic (0 0 1)-direction and leads to a glass–ceramic with a highly oriented microstructure. The mechanism of this process is discussed as well as the crystallization behavior under normal conditions. |
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