SnO₂-(1-x)P₂O₅ -xB₂O₃ 유리의 열적, 구조적 특성

SnO₂-(1-x)P₂O? -xB₂O₃ glass system were prepared by melt-quenching technique in the compositional series containing 50, 55 and 60 ㏖% of SnO₂. Local structure of the glasses was investigated by Raman and FT-IR measurements. A large glass-forming region was found at the phosphate side of the ternary system with homogeneous glasses containing up to 5~25 ㏖% of B₂O₃. According as content of B₂O₃ increases, theraml expansion coefficient of glass decreased but transition temperature and softening temperature increased. Because these phenomenon changed local structure of glass. According as content of B₂O₃ increases, quantity of bridging oxygen increased. Also, according as content of SnO₂ increases, confirmed that quantity of non-bridging oxygen increases.