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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 14    No. 6    December 2004

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Effects of rare earth addition on sintering process and dielectric property of cordierite based glass-ceramics
CHEN Guo-hua(陈国华)1, 2, LIU Xin-yu(刘心宇)1, 2

1. Department of Materials Science and Engineering,
 Guilin University of Electronic Technology, Guilin 541004, China;
2. School of Materials Science and Engineering,
 Central South University, Changsha 410083, China

Abstract: The effects of rare earth oxide on the sintering and dielectric property of cordierite-based glass-ceramics with non-stoichiometric composition prepared by quenching of molten droplets were investigated. The results show that the addition of rare earth oxide can lower the sintering temperature of cordierite glass-ceramics, improve the densification process and obviously reduce sintering activation energy. It is found that the densification of cordierite-based glass-ceramics is a liquid phase sintering process. The dielectric constant of the sintered compacts enhances with the increase of the density. When the sintering temperature is identical, the rare earth addition is found to have a noticeable effect on the dielectric loss of glass-ceramics. The properties of the glass-ceramics containing rare earth oxide appear to be correct for low firing temperature substrates.

 

Key words:  sintering; rare earth; cordierite glass-ceramics; dielectric property

ISSN 1672-7029
CN 43-1423/U

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