Phase Transition and Dielectric Properties of MgO-Al2O3-SiO2-TiO2 Glass-ceramics Adding CeO2

doi:10.3724/SP.J.1077.2007.00035

Abstract

Abstract: The glass-forming, the crystallization process and microwave dielectric properties of MgO-Al₂O₃-SiO₂-TiO₂ system glasses adding CeO₂ were investigated by means of DTA, XRD, SEM. Results show that spontaneous
crystallization of the MgO-Al₂O₃-SiO₂-TiO₂ system glasses is obviously prevented with the increass of CeO₂ content. After heat treatment (nucleation at 770℃ for 4h and cryatal growth at 1200℃ for 1.5h) the crystallized volume fraction of rutile and cordierite decrease and that of perrierite increases. The glass-ceramics obtained by crystallization of the glasses have dielectric constant of 7.5--10.5, and microwave loss less than 5.5×10^-4.

Key words: glass-ceramics, microwave materials, MgO-Al2O3-SiO2-TiO2-CeO2 system glass

CLC Number:

TQ174

DONG Ji-Peng,HE Fei,LUO Lan,CHEN Wei. Phase Transition and Dielectric Properties of MgO-Al₂O₃-SiO₂-TiO₂
Glass-ceramics Adding CeO₂[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2007.00035.

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Phase Transition and Dielectric Properties of MgO-Al₂O₃-SiO₂-TiO₂
Glass-ceramics Adding CeO₂

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