Nano tungsten oxide may be used for the preparation of near-infrared shielding material, which plays the role of “heat insulation, energy saving and anti-glare”, mainly reflecting its photochromic properties.
As a new dingal material, tungsten oxide has many excellent characteristics such as easy synthesis, low energy consumption, wide viewing angle, long working life, good stability, high coloring efficiency, low production cost, and strong color contrast, etc. Such advantages make tungsten oxide become one of the research hotspots in the field of color change. Whether it is photochromic or electrochromic, the tungsten oxide in the colored state exhibits deep blue color, which is suitable for daily household use due to its soft color and good UV shielding performance. In addition, the crystalline tungsten oxide has a high reflectance to the infrared after discoloration, and can achieve a similar thermal insulation effect as the low-emissivity glass (low-E glass), thereby helping to reduce indoor energy consumption.
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