| 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 |
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Received: 15 March 2016; Accepted: 10 May 2016. Published online: 5 October 2016. |
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| ABSTRACT |
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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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