Ball-to-powder weight ratios

Powder description Gas RPM Speed (%) Ball to powder weight ratio No. of balls WD (mm) Mode Milling Time (h)... 

Fig. 2.38 The effect of ball-to-powder weight ratio on the efficiency of milling under two impact modes (a) IMP710 and (b) IMP58 in the magneto-mill Uni-Ball-Mill 5 [63]...

Fig. 3.6 Secondary electron micrographs showing morphology of (a) as-received NaAlH and (b) after milling for 5 h in the magneto mill Uni-BaU-MiU 5 under HES57 mode in argon (two magnets at 5 and 7 o clock positions ball to powder weight ratio 50 1)...

The characteristics of commercially obtained starting powders are listed in Table 1. After weighing and ultrasonic dispersion, raw powders were milled in a QM-1SP planetary ball mill. Blending was done at 180-200 rpm with WC-Co balls (ball-to-powder weight ratio, 7 1) for 24 h in ethanol bath. Then, the slurry mixture was dried for 12 h at the temperature of 80 C, after which dried powders were sieved... 

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