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. 2021 Sep 7;9:728907. doi: 10.3389/fchem.2021.728907

FIGURE 2.

FIGURE 2

SEM images of biomorphic CaC2 obtained by heterogeneous Ca-C reaction. (A,B): CaC2 obtained at ∼1,500°C; (C,D): CaC2 obtained at T < 900°C. (A,C): overall biomorphic microstructure; (B,D): detail showing the grain size and morphology.