Figure 1
From: Preparation of colourless phosphate glass by stabilising higher Fe[II] in microwave heating
Photograph of Fe-doped phosphate glasses melted in both conventional and MW heating with increasing concentration of Sn (0 to 1.5 wt.%) [a: GC 0Sn, b: GC 0.5Sn, c: GC 1Sn, d: GC 1.5Sn, and e: GM 0Sn, f: GM 0.5Sn, g: GC 1Sn, h: GM 1.5Sn].
