Effect of Cerium Oxide on Sinterability, Microstructure and Properties of Anorthite-Based Glass/Ceramic Composites

Abstract:

The properties of anorthite-based glass/ceramic with different amounts of CeO₂ addition had been investigated in this paper. The glass/ceramics with small amounts of CeO₂ addition could be well sintered at 850~900°C. The water absorption was examined to evaluate the sintering behavior of the samples. The crystalline phase,microstructure, dielectric properties, thermal expansion and bending strength were characterized by X-Ray diffraction (XRD), scanning transmission electron microscope (SEM), impedance materials analyzer, thermal expansion analyzer and flexural strength analyzer. The results showed the 1wt % CeO₂-doped glass/ceramics sintered at 900 °C have optimum properties of ε = 6.282, tanθ = 2.18×10^-3 at 1 MHz and a thermal expansion coefficient of 3.32×10^-6 °C^-1 (25~500 ^{oC) matched with silicon chip (3.4×10-6} °C ^-1). Obviously, CeO₂ could be used as a suitable sintering aid that improves densification of the glass/ceramic composites.

• Periodical: Key Engineering Materials (Volume 544)
• Pages: 52-55
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.544.52
• Online since: March 2013
• Authors: Wei Xia Dong, Qi Fu Bao, Xing Yong Gu, Yan Chun Huang
• Keywords: Anorthite-Based Glass/Ceramic, CeO₂, Microstructre Properties, Sinterability

References

[1] M. Sen, Y. Juan, M. F. Ferreira Jose, The fabrication and characterization of low-k cordierite-based glass-ceramics by aqueous tape casting, J. Eur. Ceram. Soc. 24, 295-300 (2004).

DOI: 10.1016/s0955-2219(03)00231-0

[2] X. Gu, W. Dong, Y. Chen and Y. Li, study of the glass-anorthite insulating composites with low dielectric constant and low sintering temperature, Rare Metal Materials and Engineering, 8, 464-467 (2007).

[3] M.T. Sebastian, dielectric materials for wireless communication, Elsevier Publications, UK, (2008).

[4] D. M. MILLER, sintered cordierite glass-ceramic bodies, US Patent 3926648 (1975).

[5] J. Kim, S. Hwang, W. Sung and H. Kim, Thermal and dielectric properties of glass-ceramics sintered based on diopside and anorthite composition, Journal of Electroceramics, 23, 209-213 (2009).

DOI: 10.1007/s10832-007-9395-9

[6] M. G. M. U. Ismail and H. Tsunatori, Z. Nakai, preparation of mullite cordierite composite powders by the sol-gel method: its characteristics and sintering, J. Am. Ceram. Soc. 73, 537-543 (1990).

DOI: 10.1111/j.1151-2916.1990.tb06550.x

[7] S. J. Penn, N. M. Alford, A. Templeton, X. Wang, M. Xu, M. Reece, K. Schrapel, Effect of porosity and grain size on the microwave dielectric properties of sintered alumina, J. Am. Ceram. Soc. 80, 1885-1888 (1997).

DOI: 10.1111/j.1151-2916.1997.tb03066.x