Yellow tungsten oxide nanoparticles can be used to prepare solar spectrum selective absorbing coating with excellent optical properties and thermal stability, and then be applied to architectural glass to obtain a transparent heat insulation glass. Such smart glass can absorb heat radiation and shield ultraviolet rays for a long time. So, why is tungsten trioxide nano powder stable in absorption of infrared rays in the long-term sun exposure?
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This is because tungsten oxide can form a stable Magneli phase under anoxic conditions and form a stable cubic and hexagonal tungsten bronze structure when cations are introduced. Therefore, when a large amount of free electrons are introduced after the reduction treatment, the tungsten oxide and the composite thereof still have stable structure and physicochemical properties, so the absorption performance of infrared rays can be kept stable in the sunlight for a long time. That is to say, yellow tungsten oxide heat insulation glass can reduce the room temperature and thereby reducing energy consumption for a long term.
