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Korean Journal of Metals and Materials > Volume 54(10); 2016 > Article
Korean Journal of Metals and Materials 2016;54(10): 752-758. doi: https://doi.org/10.3365/KJMM.2016.54.10.752
다성분 원료를 사용한 코디어라이트 내열재료 제조 및 알칼리계 원료 첨가 효과
정숙인1, 김남일1, 이상진1,2
1목포대학교 세라믹산업기술연구소
2목포대학교 신소재공학과
Synthesis and Sintering Behavior of Cordierite Prepared from Multi-Component Materials Including Alkaline-Earth Minerals
Suk-In Jeong1, Nam-Il Kim1, Sang-Jin Lee1,2
1Research Institute of Ceramic Industry and Technology, Mokpo National University, Muan 58554, Republic of Korea
2Department of Advanced Materials Science and Engineering, Mokpo National University, Muan 58554, Republic of Korea
Correspondence  Sang-Jin Lee ,Tel: +82-61-450-2493, Email: lee@mokpo.ac.kr
Received: 15 March 2016;  Accepted: 10 May 2016.  Published online: 5 October 2016.
Cordierite was synthesized using multi-component materials based on a talc-alumina-clay system. The cordierite sintered at 1360 °C showed a high relative density of 98.8% and a low thermal expansion coefficient of 1.59×10-6/°C. To study the effect of adding alkaline-earth minerals on the cordierite properties, petalite, potash-feldspar, and dicalcium phosphate were added to the synthesized cordierite. In the case of 9 wt% petalite or potash-feldspar addition, the cordierite was more densified; however, the thermal expansion coefficient and the pyroplasticity index were increased. In particular, a 5 μm thick self-glazed coating was formed with the addition of 9 wt% potash-feldspar. In the case of adding dicalcium phosphate, a glass phase was formed at low temperature and gas bubbles formed at high temperature above 1320 ℃. The cordierite synthesized using multi-component materials is expected to be employed as a material for high thermal shock, dense-microstructure flameware.
Keywords: cordierite, flameware, thermal expansion, densification, thermal shock
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