Characteristics of high borosilicate glass

High borosilicate glass has a very low coefficient of thermal expansion, only about one-third of that of ordinary glass, which reduces the impact of temperature gradient stress and thus has stronger fracture resistance. Even if the temperature suddenly changes, high borosilicate glass is not easily broken. The shape deviation is very small, and when broken, high borosilicate glass will have large cracks instead of being crushed into particles. Meanwhile, high borosilicate glass also has low dispersion and relatively low refractive index.