Effects of Sintering Temperature and Porogen Addition on Properties of Low Cost Porous Mullite Ceramics

Abstract:

In the present paper, low cost porous mullite ceramics with high porosity, high strength and low thermal conductivity were fabricated using ceramic waste powder and clay as raw materials, and sawdust as porogen. The correlation of phase composition and physicochemical properties of such porous mullite ceramics were researched by varying sintering temperature and the extra addition of sawdust. The results show that: The ceramics show the best comprehensive properties when the sintering temperature is 1400 oC and the addition of sawdust is 30wt%. The results of SEM and EDS analysis confirm that new mullite phase is generated in the ceramics, which can strengthen the ceramics. And the best value of the bulk density, apparent porosity, cold crushing strength and the thermal conductivity of the prepared ceramics is 0.96g.cm-3,60.7%,5.3MPa and 0.212W·m-1·K-1, respectively.

• Periodical: Key Engineering Materials (Volume 655)
• Pages: 114-117
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.655.114
• Online since: July 2015
• Authors: Na Na Xu, Shu Jing Li*, Yuan Bing Li, Lin Yuan, Jin Long Zhang, Lei Wang
• Keywords: Ceramics Waste, Mullite, Porous

References

[1] A. Studart, U. Gonzenbach, E. Tervoort, L. Gauckler, J. Am. Ceram. Soc. 89 (2006) 1771-1789.

[2] H. Schneider, J. Schreuer, B. Hildmann, J. Eur. Ceram. Soc. 28 (2008)329-344.

[3] I.A. Aksay, J.A. Pask, J. Am. Ceram. Soc. 58 (11-12) (1975) 507-512.

[4] R.F. Davis, J.A. Pask, J. Am. Ceram. Soc. 55 (10) (1972) 525-531.

[5] S.H. Risbud, J.A. Pask, J. Am. Ceram. Soc. 61 (1-2) (1978) 63-67.

[6] M. Cregut, M. Bedas, M. -J. Durand, G. Thouand, Adv. 31 (2013)1634-1647.

[7] Y.C. Dong, J.D. Wu, X.F. Feng, J. Alloys Compd. 460 (2008) 651-657.

[8] A.M. Paiva, P. Sepulveda, V. C. Pandolfelli, J. Mater. Sci. 34 (1999) 2641-2649.

[9] L. L Gong, Y.H. Wang, X.D. Cheng, Int. J. Heat and Mass Transfer 67 (2013) 253–259.

[10] W. Shen, L.J. Feng, A.L. Lei, et al., Ceram. Int. 40(2014)1495-1502.