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Additional recommended knowledge
Ceramic microspheres were developed by NASA to combat the extremely high temperatures that the space shuttle experiences during reentry. The micro-spheres are hollow, and all gas has been removed, which creates a vacuum. In effect, they act as miniature thermos bottles.
The ceramic composition enables the micro-spheres to block heat radiation and dissipate heat rapidly, preventing heat transfer through the coating with 90% of solar infrared radiation and 85% of ultraviolet radiation being radiated back into the atmosphere.
This technology is very different than borosilicate glass spheres that are commonly claimed to have similar properties. The thermal conductivity of glass is very different from that of a true ceramic. Glass also lacks the strength of a ceramic sphere.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Insulative_paint". A list of authors is available in Wikipedia.|