Barium carbonate (BaCO₃)
Barium carbonate is a key additive in ceramics and one of the most widely used ingredients in glaze formulation because of its ability to lower the melting point, allowing glazes to melt at lower temperatures and facilitating efficient firing. This compound not only contributes to the durability of the glaze, but also improves the appearance and quality of the surface, creating glossy and smooth finishes that are highly valued in utilitarian and decorative ceramics.
In addition to its properties as a flux, barium carbonate is an effective neutralizer of impurities present in the clay, such as soluble salts and other elements that can cause stains or unwanted bubbles during firing. This purifying effect helps to maintain the integrity of the color and the final finish of the piece.Interesting Fact
In addition to its use in ceramics, it is a crucial ingredient in the manufacture of bricks and tiles, where it is used to reduce the appearance of efflorescence, those white spots that appear on the surface due to soluble salts. Barium carbonate reacts chemically with these salts, neutralizing them and preventing them from migrating to the surface, which helps maintain a clean, uniform appearance.Helpful Tip
Due to its toxicity in its raw state, it is important to handle barium carbonate with caution, ensuring that it is well contained in the glaze after firing for safe use in functional and food-grade parts, as they can be toxic if not handled correctly.
