Window material electromagnetic transparency rang

Figure E.1. Electromagnetic transparency range of optical window materials (micrometers)...

The aluminum nitride/boron nitride (AIN/BN) composite material is of considerable interest in modem technological applications because of its excellent mechanical, chemical and physical properties. Aluminum nitride and boron nitride are essentially chemically inert materials, stable at elevated temperatures. Furthermore, they are electrically nonconductive, yet possess high thermal conductivity, together widi optical transparency over a wide spectral range, and have excellent dielectric properties. These properties make the AIN/BN composites suitable as an electromagnetic window material, grinding media, heat sink, as well as electric and stmctural materials. 

Figure 11 The diamond-anvil cell has emerged as the dominant and most versatile tool for achieving high pressures (up to millions times of the atmospheric pressure). It uses two diamond anvils, which exert pressure and serve as windows on the sample. A metal gasket confines the sample and supports the anvils. Because diamond is the strongest material known and is transparent over a wide range of the electromagnetic spectrum, various high-pressure experiments are performed using synchrotron radiation...

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