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J. Korean Ceram. Soc. > Volume 38(12); 2001 > Article
Journal of the Korean Ceramic Society 2001;38(12): 1137.
적외선 반사체용 결정화유리 제조 및 광학적 특성평가
박규한, 신동욱, 변우봉1
한양대학교 세라믹공학과
1한국전기연구원
Fabrication and Optical Characterization of Glass-ceramics for IR Reflector
ABSTRACT
In this study, glass-ceramics containing cordierite(2MgO$.$2Al$_2$O$_3$5SiO$_2$) as a major crystalline phase was prepared from MAS (MgO-Al$_2$O$_3$-SiO$_2$) glass system for the application to reflector. Glasses prepared with addition of TiO$_2$as a nucleating agent were crystallized by two-step heat treatment of nucleation and crystal growth. Then nucleation and crystal growth behavior were investigated and the influence of heat treatment schedule on the nature of crystal phases and the diffuse reflectance spectrum was investigated. As a result, cordierite and rutile were precipitated as a major crystalline phases for the glass-ceramics with the nucleation at 750$^{circ}C$ for 3 hours and then crystallization at 1100$^{circ}C$ for 5 hours, and this glass-ceramics showed the reflectance over 90% in 570∼2500nm specturm region.
Key words: IR reflector, Glass-ceramics, Cordierite, MAS
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