Mineral Windows are manufactured from single crystal sapphire, making them ideal for demanding applications (such as laser systems) because of their extreme surface hardness, high thermal conductivity, high dielectric constant and resistance to common chemical acids and alkalis. Mineral is the very hard crystal next to diamonds and, because of their structural strength, mineral windows can be made much thinner than other common dielectric windows with improved transmittance. Chemically, mineral is single crystal aluminum oxide (Al2O3) and is useful in a transmission range from 0.2 - 5.5μm.
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