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Journal of the Korean Ceramic Society 1998;35(6): 640. |
PbO-TiO$_2$-B$_2$O$_3$-BaO 계 유리에서 PbTiO$_3$ 결정의 핵생성 곡선 결정을 위한 열시차분석법의 응용 |
이선우, 심광보1, 오근호2 |
한양대학교 신소재 공정공학원 1한양대학교 세라믹 공정 연구센터 2한양대학교 세라믹공정연구센터 |
Determination of the Nucleation Rate Curve for Lead Titanate in the PbO-TiO$_2$-B$_2$O$_3$-BaO by Diffferential Thermal Analysis |
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ABSTRACT |
Nucleation and crystallzation of a quaternary glass system for lead titanate glass-ceramics were in-vestigated using DTA(differential thermal analysis ) with variation of nucleation temperature and crystal growth time. Glass samples containing 60mol% of PbO-{{{{ { TiO}_{2 } }} were prepared from melts by the conventional normal cooling method in a cylindrical brass mould. The glass sample was nucleated between 40$0^{circ}C$ and 50$0^{circ}C$ for a given time and showed the maximum nucleation rate at 46$0^{circ}C$ The DTA crystallization peak temperature decreased with increasing nucleating time and decreasing heating rate during DTA runs which indicated an increase of the number of nuclei produced in the system |
Key words:
Lead titanate glass-ceramics, Nucleation, Crystallization, DTA, Nucleation curve |
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