Figure 4. Water-soluble experiments of the KNO3-based salt core strengthened by 30 wt.% glass fiber (size = 25
lm) in 80 C water: (a) 0 min; (b) 6 min; (c) 12 min; (d) 18 min
Figure 4. Water-soluble experiments of the KNO3-based salt core strengthened by 30 wt.% glass fiber (size = 25
lm) in 80 C water: (a) 0 min; (b) 6 min; (c) 12 min; (d) 18 min