CO2 Emission at 350°C, detected in STA/DTA-FTIR, from fast fired (roller kiln) clay ceramics?

Hello there, We have found CO2-Peaks on different aged clay ceramics by STA/DTA-FTIR analysis at approx. 300-400°C and 500-600°C. We found no Carbonates with the XRD. Does anyone have an idea here?

22 November 2019 9,303 2 View