Synergistic Sintering of Lignite Fly Ash and Steelmaking Residues towards Sustainable Compacted Ceramics

Figure 1

Selected photographs of the disc-shaped ceramic specimens (with diameter 13 mm) consisting of 100 wt.% FA (a, b), 100 wt.% EAFD (c, d), 50-50 wt.% FA + EAFD mixture (e, f, g), and 33,3-33,3-33,3 wt.% FA + EAFD + LFS mixture (h, i, j). Sintered samples at 1150°C (a, c, e, h), 1050°C (b, d, f, i), and nonsintered samples (g, j) are shown from top to bottom, respectively.