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http://dx.doi.org/10.3740/MRSK.2015.25.7.330

Synthesis of Low-Thermal-Expansion Cordierite Ceramics Prepared from Pyrophyllite  

Kim, Dong-Min (Department of Advanced Materials Science and Engineering, Mokpo National University)
Jung, Sook-In (Research Institute of Ceramic Industry and Technology, Mokpo National University)
Lee, Hun-Chul (Research Center, Sewon Hardfacing Co., Ltd.)
Lee, Sang-Jin (Department of Advanced Materials Science and Engineering, Mokpo National University)
Publication Information
Korean Journal of Materials Research / v.25, no.7, 2015 , pp. 330-335 More about this Journal
Abstract
A low thermal expansion ceramic, cordierite ($2MgO{\cdot}2Al_2O_3{\cdot}5SiO_2$), was synthesized using pyrophyllite. Pyrophyllite usually consists of $SiO_2$ and $Al_2O_3$, which are the main components of cordierite. $MgCO_3$ and $Al(OH)_3$ were added in various amounts to pyrophyllite and fired for synthesis and sintering. ${\alpha}$-cordierite crystallized from $1000^{\circ}C$ with mixing of 20 wt% $MgCO_3$ and 1.7 wt% $Al(OH)_3$, and un-reacted cristobalite was also detected with the cordierite. As the temperature was increased to $1400^{\circ}C$, the cordierite yield was gradually increased. Powder compacts of the synthesized cordierite were sintered between $1250^{\circ}C{\sim}1400^{\circ}C$; the sintered samples showed a low thermal expansion coefficient of $2.1{\times}10^{-6}/^{\circ}C$ and typical sintering behavior. It is anticipated that it will be possible to synthesize cordierite ceramics on a mass production scale using the mineral pyrophyllite.
Keywords
pyrophyllite; cordierite; synthesis; thermal expansion coefficient; sintering;
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  • Reference
1 H. Suzuki, K. Ota and H. Saito, J. Ceram. Soc. Japan, 95(2), 163 (1987).   DOI
2 H. Suzuki, K. Ota and H. Saito, J. Ceram. Soc. Japan, 95(2), 170 (1987).   DOI
3 V. Garciao and J. Robredo, p. 277, Science of Ceramic, Academic Press, New York, USA (1962).
4 F. L. Fackson, J. Am. Ceram. Soc., 55(7), 671 (1976).
5 C. K. Lee, J. Korean Ceram. Soc., 10(1), 79 (1973).
6 H. G. Jho, J. Miner. Soc. Korea, 13(1), 28 (2000).
7 J. H. Park, K. H. Kim and D. Y. Shim, J. Eng. Res. Inst., 26(1), 55 (1994).
8 T. S. Kang, N. I. Kim and S. J. Lee, J. Ceram. Proc. Res., in press (2015).
9 R. Morell, Proc. Brit. Ceram. Soc., 28, 53 (1979).
10 W. Schreyer and J. F. Schairer, J. Gbr. Petrol., 2(3), 324 (1961).   DOI
11 S. D. Jang, H. S. Song and S. W. Kim, "Development of low thermal expansion ceramics using domestic clay minerals", Korea Advanced Institute of Science and Technology, Daejeon (1989).
12 Y. S. Lee, Ph. D. Thesis (in Korean), Myungji University, Seoul (2005).
13 R. J. Beal and R. L. Cooke, J. Am. Ceram. Soc., 35(2), 53 (1952).   DOI