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If you are searching for what is precipitated barium sulfate, this comprehensive guide explains everything industrial buyers need to know. From its production process to its superior physical properties and wide-ranging applications, precipitated barium sulfate is a key functional filler in modern manufacturing industries such as coatings, plastics, and rubber.
What Is Precipitated Barium Sulfate?
Precipitated barium sulfate is a chemically synthesized inorganic compound with the formula BaSO₄. Unlike natural barium sulfate (barite), which is mined from mineral deposits, precipitated barium sulfate is produced through a controlled chemical reaction between barium salts (such as barium sulfide) and sulfate sources (like sodium sulfate or sulfuric acid).
It is valued for its high purity, fine particle size, superior whiteness, and chemical inertness, making it an ideal filler and functional additive in high-performance applications.
How Is Precipitated Barium Sulfate Produced?
The production of precipitated barium sulfate involves a simple yet highly controlled precipitation process:
Reaction: A solution of barium sulfide (BaS) reacts with sulfuric acid (H₂SO₄) or sodium sulfate (Na₂SO₄).
Precipitation: The reaction produces barium sulfate (BaSO₄) as an insoluble white precipitate and by-products such as sodium sulfide (if sodium sulfate is used).
Filtration and Washing: The precipitate is filtered and thoroughly washed to remove soluble impurities.
Drying and Milling: The filtered product is dried and finely milled to achieve precise particle size distribution.
This process ensures a product with consistent purity (≥98–99%), high whiteness, and controlled particle morphology.
Key Properties of Precipitated Barium Sulfate
Precipitated barium sulfate offers superior physical and chemical characteristics compared to natural barite:
High Whiteness: Typically ≥98%, ideal for color-sensitive applications like coatings and plastics.
High Purity: Contains minimal impurities such as iron, silica, or other heavy metals.
Fine Particle Size: Tailored to submicron or micron levels for optimal dispersion.
Low Oil Absorption: Improves processing efficiency in paints, coatings, and plastics.
Chemical Inertness: Stable in acids, alkalis, and environmental exposure.
High Density: Around 4.4–4.5 g/cm³, contributing to weight and stability in formulations.
