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Sapphire crystal is extremely hard and scratch resistant useful for the visible
and ir spectrum. It has excellent thermal conductivity at low
temper-atures allowing sapphire to be used in many diverse fields
requiring thermal conduction and heat radiation. Sapphire has
high dielectric constant and is resistant to common chemical
acids and alkaline. Optical sapphire has no colouration and with
a selection of grades of sapphire transmission ranging from
170nm to 6 microns. Window shall not brown when subjected to UV Light.
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