| Sol-Gel법에 의한$ZrO_2$ Ceramic Fiber 제조 |
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| $ZrO_2$ Ceramic Fiber Fabrication by Sol-Gel Processing |
| 김선욱 , 김성숭 , W.C. LaCourse 1 |
산업과학기술연구소(RIST)
1N.Y. State College of Ceramics, Alfred University |
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| ABSTRACT |
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Zirconia gel fibers were fabricated by sol-gel processing using zirconium alkoxides and 2, 4-pentanedione. Their phase transformation and microstructural evolution were studied after heat treatments up to 150$0^{circ}C$. Tetragonal ZrO2 began to form at 50$0^{circ}C$ and followed by monoclinic, tetragonal phase during subsequent heat treatments at 1000, 150$0^{circ}C$ for 1hour respectively. During cooling from 150$0^{circ}C$, cracks were created, propagated along grain boundaries due to the volume change from tetragonal to monoclinic transformation. |
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