Ammonium tungsten bronze (ATB) is a blue oxide with a hexagonal or tetragonal structure and contains a certain amount of ammonia. It has higher activity than WO2.9, especially ammonium ions can exchange with doping element potassium in solution. , in the reduction process, it can promote the formation of a bronze phase structure with potassium, which is beneficial for potassium to enter tungsten and be highly dispersed. Ammonium tungsten bronze has strong near-infrared absorption ability, and the film containing nanoparticles can effectively shield the near-infrared rays of 780~2500nm and maintain a high transmittance of visible light.
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