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Types of Glass (Fused Glass (very high softening point (1700'…
Types of Glass
Fused Glass
very high softening point (1700'C)transparent to ultravilot and infrared light
difficult to made into different shape
no crack when temperature change
(very low thermal expansion coefficient)
very resistant to chemical reactions
SiO (99%)
B2O3 (1%)
telescope mirrors, lens, optical fibres, laboratory glass wares
Soda Lime Glass
low softening point (700'C)
breaks easily
cracks easily with sudden temperature change
(high thermal coefficient of expension)
less resistant to chemical reaction
easy to make into different shape
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Borosilicate Glass
quite high softening point (8000'C)
doesn't crack easily with sudden temperature change
transparent to ultraviolet light
more resistant to chemical reaction
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