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. 2022 Sep 27;15(19):6703. doi: 10.3390/ma15196703

Figure 25.

Figure 25

Figure 25

FTIR spectra of tested materials after exposure to alkaline carbonate (250 °C, 40 days) and 3 cycles of thermal shock (one cycle: 600 °C heat overnight → cold water quenching for 10 min).