Wollastonite powder is an industrial mineral sourced from wollastonite (CaSiO₃), a calcium metasilicate mineral formed in metamorphic and sedimentary rocks. Mined predominantly in the U.S., China, India, and Mexico, raw ore undergoes crushing, grinding, and purification (such as magnetic separation) to yield fine, white powders with particle sizes ranging from microns to sub-micron levels.
Characterized by its needle-like crystalline structure (high aspect ratio), low moisture absorption, and chemical stability, it excels in diverse applications. In ceramics, it minimizes firing shrinkage and enhances thermal shock resistance, making it essential for durable tiles and refractories. For paints and coatings, it acts as a reinforcing filler, improving opacity, weather resistance, and scratch resistance. In plastics, it strengthens polymers, reduces warping, and cuts costs as a substitute for expensive additives. Additionally, it boosts brightness and printability in paper manufacturing and stabilizes arcs in welding rods.
Post time: May-30-2025