Studies on AlF3-(Mg＋Sr＋Ba)F2-P2O5 Glasses II. Effect of MgF2 Contents

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J. Korean Ceram. Soc. > Volume 24(3); 1987 > Article

Journal of the Korean Ceramic Society 1987;24(3): 277.

AlF3-(Mg＋Sr＋Ba)F2-P2O5계 유리에 관한 연구 제2보 : MgF2의 영향

김정은, 이종근

한양대학교 무기재료공학과

Studies on AlF3-(Mg＋Sr＋Ba)F2-P2O5 Glasses II. Effect of MgF2 Contents

ABSTRACT

The various contents of MgF2 from 0 to 12.5wt% are studied in the AlF3-(Mg＋Sr＋Ba)F2-P2O5 system for the effects of various properties in glasses and the atmosphere of melting was controlled by N2 and Ar gas respectively. Density, refractive index, infrared transmission, thermal conductivity and thermal expansion coefficient of glasses are determined. Density, refractive index and thermal conductivity are decreased, micro-hardness and thermal expansion coefficient are increased according to the increasing of MgF2 contents. Infrared transmittance decreases with increasing the MgF2 contents and it slightly dropped by air than N2 and Ar atmosphere. Other properties are not influenced by atmosphere control.