Characteristics of Nanostructured $WO_3-CuO$ Powder Mixture Produced by Ball Milling

In the present work, the influence of the ball-milling time, milling atmosphere and weight ratio of ball to powder on characteristics of $WO_3-CuO$ was studied. Results show that, the grain sizes of the $WO_3$ and CuO in the ball-milled powder mixture were significantly decreased with increasing the milling time. Those of each oxide ball-milled in Argon and Hexane atmosphere for 30 and 20 hour were about 98 and 84 nm, respectively. After milling of 20 hour in Hexane as PCA, the powder had a homogeneously mixed structure and the average size of $WO_3-CuO$ powders was determined to about 230nm.