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Comparison of Porous Ceramic Materials with Low Thermal Expansion Coefficient Prepared with SiC and Black-Al2O3

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Abstract:

Porous ceramic materials with low thermal expansion (LTE) at room temperature were prepared by heating a mixture of SiC or black-Al2O3, vitrified bonding material (VBM) and LiAlSiO4 at temperatures from 850°C to 1100°C. The mixture was prepared in adequate proportions to obtain a material with LTE according to previous works made in our laboratory. It was observed that a change in temperature provoked the formation of a new phase, LiAlSi3O8, which appears above 900°C. The presence of this new phase did not affect the thermal expansion value, keeping LTE at room temperature. All compounds showed around 40% of porosity, and Young’s modulus values of 30 GPa using black-Al2O3 or SiC. X-ray diffraction analysis (XRD) revealed that above 900°C the phase LiAlSi3O8 starts to appear as a consequence of the melting of VBM, which is reacting with the raw materials. SEM micrographs showed the presence of SiC or black-Al2O3 grains joined by VBM, which is acting as a bridge between them.

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Periodical:

Materials Science Forum (Volume 569)

Pages:

321-324

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.569.321

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Online since:

January 2008

Authors:

Isaías Juárez-Ramírez, Koji Matsumaru, Kozo Ishizaki, Leticia M. Torres-Martínez

Keywords:

Black Al2O3, Low Thermal Expansion, Porous Material, Silicon Carbide (SiC)

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] K. Ishizaki, S. Komarneni and M. Nanko in: Porous Materials. Process Technology and Applications, edited by Kluwer Academic Publishers. The Netherlands (1998).

Google Scholar

[2] K. Ishizaki: Ceramics Japan, Vol. 41 (2006), p.529.

Google Scholar

[3] R. Roy, D. K. Agrawal and H. A. McKinstry in: Ann. Rev. Mater. Sci. 19 (1989), p.59.

Google Scholar

[4] I. Juarez-Ramirez, K. Matsumaru and K. Ishizaki: Journal of the Ceramic Society of Japan 114 (2006), p.1111.

Google Scholar

[5] S. Okada in: Development and Applications of Porous Ceramics, CMC, Tokyo (1991), p.118.

Google Scholar