Research On Theories And Experiments Of Infrared Stelathy ZnO Material With Low-Emissivity

With the development of infrared detective technology, the infrared stealthy material has made much progress. As one kind of the stealthy materials, the coating with low-emissivity became very important as well. Filler was the main component of coatings, so it was of great significance to study the effect factors and influence mechanism on the low-emissivity filler.This dissertation has stated some theories and experimental researches based on the exploitation of infrared stealthy material with low-emissivity, ZnO as main substance. The development of infrared stealthy material all over the world, the basic principles on infrared ray and infrared stealth, the mechanics of absorption and radiation are introduced in detail, respectively.Secondly, the electronic structure and population analysis of ZnO crystal and semi-conductivity doped system have been studied systematically by first-principles based on density-functional theory. The results show that the semi-conductivity doped ZnO crystal has better conductivity performance. By comparing with conductivity and calculating the emissivity, we obtain that Na doping makes a great contribution to the emissivity reduction.Finally, experimental researches on doped ZnO have been carried out. A discussion on the effects of different doping concentrations and thermal processing temperatures has been made after the measurements of XRD, SEM and emissivity.