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50-250C (122-482F) | 80-250C (176-482F) | 120C (248F) | 150C (302F) | 180C (356F) | 185C (365F) | 200-1000C (392-1832F) | 200-450C (392-842F) | 200C (392F) | 210-280C (410-536F) | 260C (500F) | 290C (554F) | 300C (572F) | 300-330C (572-626F) | 300C (572F) | 370C (698F) | 370-700C (698-1292F) | 400-600C (752-1112F) | 400C (752F) | 425-650C (797-1202F) | 470-1200C (878-2192F) | 500-600C (932-1112F) | 512C (953F) | 540-600C (1004-1112F) | 650-900C (1202-1652F) | 750-850C (1382-1562F) | 750-1000C (1382-1832F) | 760C (1400F) | 760C (1400F) | 787C (1448F) | 800-1100C (1472-2012F) | 815C (1499F) | 815C (1499F) | 843C (1549F) | 850-950C (1562-1742F) | 850C (1562F) | 850C (1562F) | 870-900C (1598-1652F) | 871C (1599F) | 900C (1652F) | 900-1000C (1652-1832F) | 900C (1652F) | 926C (1698F) | 932C (1709F) | 954C (1749F) | 980C (1796F) | 982C (1799F) | 990C (1814F) | 1025-1325C (1877-2417F) | | 1050C (1922F) | 1050C (1922F) | 1065-1120C (1949-2048F) | 1082C (1979F) | 1100C (2012F) | 1100C (2012F) | 1100C (2012F) | 1100C (2012F) | 1300C (2372F) | 1325C (2417F) | 1330C (2426F) | 1360C (2480F) | 1418-1428C (2584-2602F) | 1420C (2588F) | 1510C (2750F) | 1550C (2822F) | 1565C (2849F) | 1650C (3002F) | 1785C (3245F) | 1990C (3614F) | 2300C (4172F) | 2320C (4208F)

1025C (1877F)

Decomposition of Barium Carbonate

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

Related Information

Example of the blisters from Barium Carbonate decomposition


Barium carbonate bubbles in a glaze

This is a combination dolomite/barium matte. It has been fired at cone 10 reduction. It contains 17% barium carbonate and 17% dolomite (in a nepheline syenite base). Most carbonates decompose and gas off the CO2 well before the glaze melts, but not barium carbonate. It can turn the glaze matrix into an "aero chocolate bar" of bubbles. The glaze melt viscosity of some glazes, like this one, makes them vulnerable to preserving the bubbles as dimples or sharp-edged holes.

Links

Materials Barium Carbonate
A pure source of BaO for ceramic glazes. This is 77% BaO and has an LOI of 23% (lost at CO2 on firing).
Temperatures Decarbonation (200-1000)
Glossary Carbon Burnout
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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