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

Table 3

Level 9 array.

Experiment	Parameter 1	Parameter 2	Parameter 3
1	1	1	1
2	1	2	2
3	1	3	3
4	2	1	2
5	2	2	3
6	2	3	1
7	3	1	3
8	3	2	1
9	3	3	2