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Journal of the Korean Ceramic Society 1999;36(10): 1040. |
| 도핑된 알루미나 여과막의 미세구조 변화 |
| 이진하, 최성철, 한경섭1 |
한양대학교 세라믹공학과
1한국과학기술연구원 |
| Microstructural Change of Doped-Alumina Membrane |
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| ABSTRACT |
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After alumina sol was prepared by Yoldas process supported membranes were fabricated by adding ce and Re solution and SiO2 sol into alumina sol. The particle size of alumina sol was 11 nm and it was monodispersed transparent and stable for long time. The pore size of un-doped membrane started to increase to about 7,5nm at 1000$^{circ}C$ and it was grown to twice (about 15nm) at 1100$^{circ}C$ However the pore size of doped alumina was uniform to 1100$^{circ}C$. The effect of retardation of grain growth was superior in SiO2 addition to that of Ce and Ru Because SiO2 doped samples transformed to needed-like phase and densified at 1200$^{circ}C$ their application in membranes was limited. Ce and Ru doped sample showed vermicular structure identical to the un-doped ones at 1200$^{circ}C$ But the particle size was smaller than that of un-doped ones. |
| Key words:
Alumina, Membrane, Pore size, Grain growth, Transform |
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