|Monthly Tech-Tip |
The mechanisms of decomposition for BaCO3, CaCO3 and SrCO3 are similar (although of course not at the same temperature; calcium carbonate, for example, is much lower than this). Decomposition of this material can be a concern (relating to glaze defects, for example) if the powder is used in ceramic clay bodies and contains granular +200 mesh material. This temperature is from Thermal Decomposition of Ionic Solids by Andrew K. Galwey, Michael E. Brown
A pure source of BaO for ceramic glazes. This is 77% BaO and has an LOI of 23% (lost at CO2 on firing).
Ceramic materials, especially clays, often contain carbon and organic compounds. When they are fired in a kiln, these must burn out, often producing complications.
|By Tony Hansen|
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