| 학회 |
한국재료학회 |
| 학술대회 |
2007년 가을 (11/02 ~ 11/02, 성균관대학교) |
| 권호 |
13권 2호 |
| 발표분야 |
구조재료 |
| 제목 |
Kinetics of crystallization in Li2O-Al2O3-SiO2 (LAS) Glass System by thermal analysis |
| 초록 |
This paper presents results and observations obtained from a study of crystallization behavior in Li2O-Al2O3-SiO2 (LAS) glass powders. Variable kinetic parameters have been obtained in order to investigate the crystallization behavior by using non-isothermal differential thermal analysis. LAS glass powders including B2O3 which induce a low firing process have been melted and crushed to obtain coarse and fine glass powder. In case of coarse particles with 88㎛, the crystallization have been started at 649~699℃, the crystallization of fine particles with ＜ 44㎛ have been observed at 640~684℃ according to heating rate. In order to obtain the activation energy of crystallization (EC) and Avrami constant (n), Kissinger and Ozawa equations have been used. From several ploting, we have calculated that the average activation energy of crystallization in Li2O-Al2O3-SiO2 (LAS) glass was 49.31 kcal/mol by Kissinger equation and Avrami constant (n) was 1.45. Finally, we have concluded that the glass powder of Li2O-Al2O3-SiO2, have crystallized primarily by surface crystallization. Also, we have seen a clear indication of this result from SEM (Scanning Electron Microscopy) results. |
| 저자 |
이규호, 진현주, 김태호, 정영준, 김영석, 류봉기
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| 소속 |
부산대 |
| 키워드 |
Crystallization Kinetics; Crystallization; LAS glass; Sintering.
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| E-Mail |
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