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期刊论文

Reaction of platinum crucible and melt during PMN-PT crystal growth

李振荣Zengzhe Xi∗ Xi Yao Zhenrong Li Zhuo Xu

Ceramics International 30 (2004) 1691-1694,-0001,():

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摘要/描述

PMN-PT crystals have been of considerable interest in recent years due to their excellent ferroelectric, piezoelectric, photoelectric propertiesand promising applications in various electric and electric-optical devices. However, the crucible leakage is usually a fetal limitation duringpreparation of the crystal. In this work, the PMN-PT crystals were prepared by Bridgman-accelerated crucible rotation technique (ACRT)method. The morphologies of the bottom surface of the PMN-PT crystal and the inner surface of the platinum crucible, in which the crystalgrew, were examined by scanning electronic microscope (JSM-840). The local composition was analyzed by EDAX spectrometer attachedto the scanning unit. Investigated results indicated that there are evident reaction between the platinum crucible and PbO-MgO-Nb2O5-TiO2melt during PMN-PT crystal growth, which is the main cause of crucible leakage. Another cause of the crucible leakage is due to the unequallydistorted platinum grain boundary.

关键词: PMN-PT Crystal growth

版权说明:以下全部内容由李振荣上传于   2010年04月30日 17时59分40秒,版权归本人所有。

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