Wollastonite

Description

1. Product Overview
   Wollastonite is a naturally occurring calcium silicate mineral (CaSiO₃) widely used as a functional industrial filler and performance-enhancing additive. It plays a critical role in ceramics, plastics, paints, friction materials, and construction applications due to its unique acicular (needle-like) crystal structure. The product delivers exceptional reinforcement, thermal stability, and dimensional integrity across demanding manufacturing environments. Its strategic importance lies in its ability to replace costlier raw materials while improving mechanical strength, durability, and process efficiency in end products.
2. Key Specifications & Technical Characteristics

• Chemical Composition: Calcium Silicate (CaSiO₃)
• Typical Purity: 90% – 98% (depending on grade)
• Physical Form: Powder / granular / micronized powder
• Color: White to off-white
• Particle Size: 45–325 mesh (custom micronization available)
• Density: 2.8 – 2.9 g/cm³
• Moisture Content: ≤ 0.5%
• pH Value: Neutral to slightly alkaline (9–10)
• Packaging Options: 25 kg bags, 1 MT jumbo bags, bulk vessel shipment
• Shelf Life: Stable indefinitely under dry storage conditions

3. Core Industrial Applications
   Wollastonite is extensively used in ceramics and tile manufacturing to improve strength, reduce shrinkage, and enhance thermal shock resistance. In plastics and polymers, it serves as a reinforcing filler, improving tensile strength, stiffness, and dimensional stability while reducing resin consumption. The paint and coating industry utilizes it to enhance durability, corrosion resistance, and surface smoothness. In friction products such as brake pads, it improves heat resistance and wear performance. Compared to alternative fillers like talc or calcium carbonate, wollastonite offers superior aspect ratio reinforcement and thermal stability, delivering higher performance efficiency in engineered formulations.
4. Competitive Advantages

• High aspect ratio mineral structure for superior mechanical reinforcement
• Consistent chemical and physical quality across batches
• Reliable large-scale supply chain with stable production sourcing
• Cost-efficient replacement for higher-cost synthetic fillers
• Environmentally friendly, naturally occurring mineral with low processing impact
• Excellent compatibility with polymers, resins, and ceramic matrices
• Strong technical documentation and application support for industrial buyers
• Optimized logistics for bulk international shipment and industrial-scale demand fulfillment

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): BULK 20 MT
• Loading Capacity: 20–25 MT per 20FT container (depending on packaging type and density)