Relationship between Photoelastic Constant of Glass and Structure of Glass

lastic constants (hereafter alleged as B) of SiO2 glass, 5Na2O⋅95GeO2 glass, Ca(PO3)2 glass, soda-lime bottle and Pyrex bottle were measured. Weyl s approach on B of bottle cannot explain why B of SiO2 is 1.33 times beyond than B of soda-lime glass.The anatomy of SiO2 bottle which consists of nonplanar rings of 6 SiO4 tetrahedra has the abandoned amplitude aural the rings.The compressive accent which changes the band bend at the bend oxygen causes the abandoned amplitude to abatement against the alongside administration of the activated stress. This deformamtion contributes to the access of B.In GeO2 and 5 Na2O⋅95GeO2 glasses, the aforementioned phenomena occur.Therefore, B of these glasses is large.The structures of borate and borosilicate glasses abide of tetraborate accumulation and diborate accumulation both with abandoned space.The compressive accent decreases the abandoned amplitude and appropriately increases the B value.The structures of Ca(PO3)2 and soda-lime glasses accept no abandoned amplitude and appropriately the proposed apparatus cannot work.Therefore, B of these glasses is small.

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