Fig. 3. (A) Schematic of the process to obtain the samples so as to observe the internal structure from the as-printed sample. (B, C, D, E, F, G and H) The SEM images of the printed samples without sintering, printed samples with 600 °C, 700 °C, 800 °C, 900 °C, 1000 °C, and 1100 °C sintering temperatures, respectively.
