Blue tungsten oxide may be applied to produce nano-ceramic color master. And the obtained dingal color master can be used in the field of transparent heat insulation film as it is easy to disperse in the product. Also, it does not affect the product quality, does not fade the product, and has excellent light resistance, high temperature resistance, wear resistance and weather resistance for long-term use.
By studying the blue tungsten oxide powder, it was found that blue tungsten oxide was cracked because a large amount of water molecules and ammonia molecules escaped from the internal lattice of APT crystal during calcining process (reduction process), and therefore large internal stress appeared in the APT crystal lattice, causing the lattice distortion and the cracking of particles. In addition, external hydrogen permeated into the APT, which promotes the deepening and expansion of cracks. Due to this cracking, vacancies are formed in the APT crystal lattice, and local intense shrinkage is induced during calcining, resulting in further fragmentation and thinning of particles.
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