Nano particle size violet tungsten oxide may be applied for producing thermal insulation film. And it is widely used for the preparation of tungsten powder, tungsten carbide powder, and so on. As a result, violet tungsten oxide has gradually come to people’s eyes, especially manufacturers and researchers. Therefore, people are paid more attention to the facts of violet tungsten oxide.
The violet tungsten oxide is light violet or blue violet. Some scholars have tested its main components and physical properties, and found that the nitrogen adsorption ratio of violet tungsten oxide is smaller than that of blue tungsten oxide and yellow tungsten oxide. Some scholars also do X-ray diffraction test of violet tungsten oxide produced by industrial rotary tube furnace, and found that its diffraction pattern is consistent with the standard W18O49 diffraction pattern. They also quantitatively analyzed the phase composition of several batches of violet tungsten oxide. And it was found that the W18O49 phase in each batch of violet tungsten oxide was greater than 97%, indicating that the prepared violet tungsten oxide is almost single phase W18O49. They also performed SEM tests on violet tungsten oxide, and found that the violet tungsten oxide agglomerates are composed of needle-like or rod-like crystal polymerization, and the polymer is loose. In addition, they conducted a TEM test on violet tungsten oxide to find that the violet tungsten oxide crystal consists of a cluster of longitudinally arranged fibrous structures.
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