조핵제 원료에 따른 Li2O-Al2O3-SiO2계 결정화 유리 특성
The properties of glass ceramics of Li2O-Al2O3-SiO2 system according to nucleation agent
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초록
조핵제 역할을 하는 지르코늄의 원료로써 ZrO2(지르코늄 옥사이드), ZrSiO4(지르코늄 실리케이트), ZrOCl2(지르코늄 옥시클로라이드), Zr(SO4)2(지르코늄 서페이트) 4종류의 원료를 사용하여 Li2O-Al2O3-SiO2계 결정화 유리를 제조하였다. 동일한 조성의 모든 유리에서 Avrami 상수는 3 이상으로 체적 결정화가 진행됨을 확인하였다. 또한 ZrOCl2, Zr(SO4)2를 사용하여 제조한 유리는 용융 과정에서 미용융물이 발생하지 않으며 지르코늄 성분이 균일하게 분포되었음을 확인하였다. 이와 같은 결과를 성분 분석, 굽힘 강도를 연계하여 평가하였다.
Abstract
The glass-ceramic of Li2O-Al2O3-SiO2 system was synthesized by using ZrO2, ZrSiO4, ZrOCl2 and Zr(SO4)2, which is a raw material of Zr serving as a nucleation agent. It was confirmed that Avrami parameter of these four glasses is over 3 for bulk crystallization. The glass synthesized by ZrOCl2, and Zr(SO4)2 showed high melting quality during the melting process. It is also observed that the Zr component is uniformly distributed in the glass. Various characterizations was evaluated, including composition analysis and bending strength.
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