### PDF The effect of high energy ball milling parameters on

thesized by 6 h of milling under optimized mechanical 2 The size and number of balls had no significant effect on the alloying parameters including 300 rpm of rotation speed synthesizing time and grain size of fluorapatite nanopowder ball to powder weight ratio B/P equal to 35 and 8 balls when the rotation speed and powder to ball weight

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