670315.fig.004a
(a)
670315.fig.004b
(b)
670315.fig.004c
(c)
670315.fig.004d
(d)
670315.fig.004e
(e)
Figure 4: Melting process in conventional DS furnace for power distribution ratio of 10 : 0: (a) 480 min; (b) 540 min; (c) 600 min; (d) 660 min; (e) 720 min.