We have investigated the crystallization mechanism of the lithium disilicate (Li2O-2SiO2, LSO) glass particles with different sizes by isothermal and non-isothermal processes. The LSO glass was fabricated by rapid quenching of melt. X-ray diffraction and differential scanning calorimetry measurements were performed. Different crystallization models of Johnson- Mehl-Avrami, modified Ozawa and Arrhenius were adopted to analyze the thermal measurements. The activation energy E and the Avrami exponent n, which describe a crystallization mechanism, were obtained for three different glass particle sizes. Values of E and n for the glass particle with size under 45 μm, 75~106 μm, and 125~150 μm, were 2.28 eV, 2.21 eV, 2.19 eV, and ~1.5 for the isothermal process, respectively. Those values for the non-isothermal process were 2.4 eV, 2.3 eV, 2.2 eV, and ~1.3, for the isothermal process, respectively. The obtained values of the crystallization parameters indicate that the crystallization occurs through the decreasing nucleation rate with a diffusion controlled growth, irrespective to the particle sizes. It is also concluded that the smaller glass particles require the higher heat absorption to be crystallized.

1. 서 론
2. 실험 방법
3. 실험 결과 및 고찰
4. 결 론
References

• 최현우(부산대학교 나노융합기술학과, 부산대학교 단결정 은행 연구소) | Hyun Woo Choi
• 윤혜원(부산대학교 나노융합기술학과) | Hae Won Yoon
• 양용석(부산대학교 나노융합기술학과, 부산대학교 나노에너지공학과) | Yong Suk Yang
• 윤수종(부산대학교 나노융합기술학과, 부산대학교 나노메카트로닉스공학과) | Su Jong Yoon Corresponding author