Tungsten oxide nanopowder has good photochromic property so that it may be applied for manufacturing heat insulating window glass. Nano grain size tungsten oxide also has electrochromic property. And it has the characteristics of small particle size, high purity, high coloring efficiency, good reversibility and short response time, so that it can also be used in electrochromic windows, large-area information displays, and automotive mirrors, etc.
Nano grain size tungsten oxide is an N-type semiconductor material with a bandwidth of about 3.25eV. And it is one of a few oxide semiconductors that are easy to realize quantum size effects. Therefore, tungsten oxide has been widely used in fuel cells, chemical sensors, photovoltaic devices, and the like.
The nanometer tungsten oxide has a particle diameter of 50-60nm. And the appearance thereof is light yellow powder. The WO3 purity is equal or greater than 99.95%. The specific surface area is 10-20 m2/g. And the ignition loss is less than or equal to 0.05%.
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