| 상안정화된 Leucite의 미세분말 합성과 열적 팽창 특성 연구 |
| 홍성진, 김득중, 유영성1 |
성균관대학교 신소재공학부
1한국전력연구원 |
| Fabrication of Stabilized Fine Leucite Powder and Its Thermal Expansion Properties |
| Sung-Jin Hong, Deug-Joong Kim, Young-Sung Yoo1 |
School of Advanced Materials Science Engineering, Sungkyunkwan University
1Korea Electric Power Research Institute |
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| ABSTRACT |
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Phase stabilized leucite, which has high coefficient of thermal expansion, was synthesized, and its thermal expansion behavior was investigated. The homogeneous leucite phase was synthesized by solid state reaction from the mixture of $K_2CO_3-Al_2O_3-SiO_2$. and its stabilization from tetragonal to cubic phase was attempted by adding $Cs_2CO_3$ into starting materials. And fine powder with an average particle size of a few hundreds ${mu}m$ were fabricated by planetary milling. During milling, amorphization of leucite was observed and recrystallized after heat treatment. The thermal expansion behavior of tetragonal and cubic leucite has measured and discussed. The average coefficient of thermal expansion of tetragonal and cubic phase leucite from room temperature to $750^{circ}C$ was $21.4{times}10^{-6}/^{circ}C$ and $14.5{times}10^{-6}/^{circ}C$, respectively. |
| Key words:
Phase transformation, Thermal expansion |
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