About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Paper
Thermal decomposition mechanism of triple carbonate (Ba,Sr,Ca)CO 3
Abstract
The thermal decomposition mechanism of the triple carbonate (Ba,Sr,Ca)CO3 is shown to proceed in a single step from the carbonates to the corresponding oxides under the condition where the decomposition itself is rate limiting. When the decomposition occurs under a high local CO2 pressure, it appears to proceed in two steps due to a subsequent recombination reaction between the CO2 and the oxides. The carbonates initially decompose into an x-ray amorphous oxide which upon further heat treatment yields a solid solution oxide (Ba,Sr,Ca)O. The exact nature of this x-ray amorphous oxide is uncertain but hydration experiments support it being either a microcrystalline or structurally disordered solid solution.