Process Parameters Optimization of Silica Sand Nanoparticles Production Using Low Speed Ball Milling Method

Table 4

Actual parameters and levels in L9 array.

Experiment	BPR	Volume of milling jar	Rotation speed
1	20 : 1	5.6 L	100 rpm
2	20 : 1	1.8 L	95 rpm
3	20 : 1	1.0 L	90 rpm
4	15 : 1	5.6 L	95 rpm
5	15 : 1	1.8 L	90 rpm
6	15 : 1	1.0 L	100 rpm
7	10 : 1	5.6 L	90 rpm
8	10 : 1	1.8 L	100 rpm
9	10 : 1	1.0 L	95 rpm