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

Table 7

Signal-to-noise ratio for each parameter and level.

Level	Ball to powder weight ratio	Volume of milling jar	Rotation speed
1	−9.3149*	−14.6563	−13.82
2	−13.8667	−13.5097	−13.20*
3	−18.0367	−13.0222*	−14.18
Range, 𝑅	8.7218	1.6341	0.97
Rank	1	2	3

∗Optimum parameter level.