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Journal of the Korean Ceramic Society 2000;37(5): 497. |
Gel Coating법에 의한 Kaolin으로부터 Mullite-Zirconia 복합체의 합성 |
김세훈, 김인섭1, 이병하 |
명지대학교 공과대학 무기재료공학과 1요업기술원 |
Synthesis of Mullite-Zirconia Composites from Kaolin by Gel Coating |
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ABSTRACT |
In this study, mullite-zirconia comosite was fabricated by adding ZrOCl2.8H2O using of boehmite gel coating to Hadong kaolin (pink A grade) in order to enhance strength of the mullite specimens. The influence of ZrOCl2.8H2O content and fireing temperature on the crystall phase, microstructure, bulk density, strength of the specimens was investigated. Mullite-zirconia composite was produced in the process of coating zirconia to mullite powder synthesized thereafter and mixing simultaneously of starting materials with boehmite-zirconia gel. Maximum strength with in this study was 251 sintered at 1$600^{circ}C$ for 2h. Bulk density and strength of the composite with zirconia coated mullite was higher than simultaneous on mixture of starting materials. |
Key words:
Kaolin, Gel coating, Mullite-Zirconia composite, ${ZrOCl_2} |
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