Dark blue nano tungsten oxide may be applied for producing heat-insulating glass window film. And such heat insulation film can be used in heat insulation fields for architectural window glass and automotive window glass, such as, office buildings, hotels, exhibition halls, high-rise apartments, villas, houses, sunrooms, and glass curtain walls in shopping malls. Then, do you know what blue tungsten oxide is?
Blue tungsten oxide powder is an unclear product industrially. The main phase composition of blue tungsten oxide is β-tungsten oxide (WO2.9). Its surface is rough and somewhat cracked. The roughness, crack size, amount of crack and the content of β-tungsten oxide have a relationship to calcination heating rate, calcination time and hydrogen flow rate. As the process conditions of each manufacturer are different, the surface roughness, crack size and crack amount of the main phase component of blue tungsten oxide powder are different from those of β-tungsten oxide.
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