Can Ammonium Metatungstate Be Used As A Precursor for The Synthesis of Tungsten Trioxide Electrochromic Films? 2023-03-02 Tungsten Oxide 181 Yes, ammonium metatungstate can be used as a precursor for the synthesis of tungsten trioxide electrochromic films, which are used in smart windows and displays. 0 0 ammonium metatungstatetungsten trioxide electrochromic films