Photonic crystal used as a thermal insulation in/on buildings, building parts, vehicles, devices, cooling devices, textiles or thermoelectric converters comprises units with a high refractive index and units with a low refractive index

摘要

Photonic crystal comprises units with a refractive index of more than 3 and units with a refractive index of less than 1.6 in a periodic succession. The units are spaced at intervals of 1-20 mu m. Preferred Features: The particles with high refractive index are made from silicon, germanium, zinc selenide, zinc oxide, metal powder or metal sulfide powder.