Super grade tungsten trioxide is a grade of tungsten trioxide with the minimum purity of 99.98%. Its grade is WO3-0. The other two grades of tungsten trioxide are grade 1 and grade 2. Their grades are WO3-1 and WO3-2 respectively. Certainly, due to the difference in raw material, processing technology, processing equipment, etc., manufacturers will also produce a variety of different specifications of tungsten trioxide in the actual production process.
The maximum percentage (%) of the impurity of the super grade tungsten trioxide is shown as follows:
Al is 0.0005; As is 0.001; Bi is 0.0001; Ca is 0.001; Co is 0.001; Cr is 0.001; Cu is 0.0003; Fe is 0.001; K is 0.001; Mg is 0.0005; Mn is 0.0005; Mo is 0.002; Na is 0.001; Ni is 0.0005; P is 0.0005; Pb is 0.0001; S is 0.0005; Sb is 0.0005 and the like.
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