Effect of Magnesium Borates on the Fire-Retarding Properties of Zinc Borates

Figure 6

SEM images of the optimum phases of (a) magnesium borates (5000x magnification), (b) magnesium borates (20000x magnification), (c) zinc borate (5000x magnification), and (d) zinc borate (20000x magnification).

(a)

(b)

(c)

(d)