Distribution of Cerium Ion in Cordierite Ceramics and Its Effect on Structure of Cordierite Crystal

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外文摘要：Cerium addition plays an important role in sintering， transformation and phasicochemical properties of cordi-erite ceramics。 The present work aims at studying the distribution of Ce~(4+) in cordierite ceramics and its effect on the structure of cordierite crystal by means of differential thermal analysis (DTA)， X-ray diffraction (XRD) and scanning electronic microscope (SEM) so as to clarify the behavior of Ce~(4+)。 Results show that Ce~(4+) can exist in two forms of CeO_2 particles and solid solution in Ce~(4+)-modified cordierite ceramics by the sol-gel method。 The CeO_2 particles separately distribute in the cordierite matrix。 Ce~(4+) dissolves little into cordierite crystal， resulting in a decrease of lattice constants of the crystal。 This kind of distribution behavior of Ce~(4+) makes us to easily tailor the properties of the cordierite ceramics。

外文关键词：

ceriumCeO_2cordieriterare earths

作者：

Shi Zhiming

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作者单位：

School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010062, China

会议名称：

Journal of Rare Earths vol.22 Spec. Issue December 2004

会议地点：

Yangzhou(CN)

会议母体文献：

International Conference on Rare Earth Ceramics and Glass; 2004; Yangzhou(CN)

页码：

P.106-108

出版时间：

2004