Sapphire Windows manufactured from single crystal sapphire are ideal for demanding applications such as laser systems, where high pressures, high temperatures, high thermal loads, vacuum conditions, scratch/wear resistance, low friction and corrosive atmospheres are important considerations. As a result, they are often used in research, medical, aerospace and military applications. Here are some reasons why.
• Except for diamonds, sapphire is the hardest crystal known to man. On the Mohs scale of hardness, which ranks materials from softest (1) to hardest (10), it is rated 9.