Precipitated Calcium Carbonate (PCC, d50 0.7µm)
Key Features
- Ultra-high whiteness (R457 >97%) for brilliant white composite products
- Controlled scalenohedral morphology provides gentle mechanical reinforcement
- Cost-effective TiO2 extender at 1:3 to 1:5 replacement ratios
- Synthetic production ensures consistent quality and high purity
- Available with stearic acid surface treatment for high-loading applications
Precipitated calcium carbonate (PCC) is synthetically manufactured through a carbonation process using highly purified milk of lime, producing particles of exceptional purity and controlled morphology. With a median particle size of approximately 0.7 µm, this product occupies the boundary between conventional filler and reinforcing filler, offering unique performance characteristics not achievable with ground calcium carbonate.
PCC particles are typically scalenohedral (rhombohedral) or cuboidal in shape, providing good mechanical reinforcement at modest loadings. The ultra-fine particle size and controlled morphology contribute to improved tensile strength, improved opacity and brightness in white systems, and enhanced barrier properties in coating applications. High whiteness (R457 > 97%) makes PCC a preferred extender for TiO2 in pigmented systems.
In the composites industry, PCC is used where surface aesthetics and white brilliance are important, such as premium gelcoats, high-brightness cultured marble, and translucent resin panels. The high surface area (typically 8–15 m²/g) makes surface treatment essential for high-loading applications. Both untreated and stearic acid surface-coated grades are available.
Specifications
| Parameter | Value |
|---|---|
| Appearance | White fine powder |
| CaCO₃ content | ≥ 99.0% |
| BET surface area | 8–15 m²/g |
| Moisture content | ≤ 0.3% |
| Whiteness (R457) | ≥ 97% |
| Particle morphology | Scalenohedral / rhombohedral |
| pH (10% suspension) | 9.5–10.5 |
| Bulk density (tapped) | 0.3–0.5 g/cm³ |
| Median particle size (d50) | 0.7 µm |
Applications
FAQ
PCC can partially replace TiO2 as a cost-reducing extender, typically at a 3:1 to 5:1 ratio (3–5 parts PCC replacing 1 part TiO2 by weight) while maintaining comparable whiteness. However, PCC has a refractive index of ~1.6 compared to TiO2 rutile at ~2.7, so full replacement would significantly reduce hiding power. Best practice is 20–40% TiO2 replacement by PCC.
Direct Contact
💬WhatsApp +86 156 3910 0440Telegram +86 156 3910 0440✉️[email protected]Reply within 24 hours
Related Products
Ground Calcium Carbonate (Fine, d50 5µm)
CAS 471-34-1
Fine particle size for improved surface quality versus coarse grades
Surface Treated CaCO3 (Stearic Acid Coated)
CAS 471-34-1
Stearic acid coating converts hydrophilic surface to organophilic
White Color Paste — TiO₂ in UPR/Epoxy (Universal)
CAS 13463-67-7
Pre-dispersed paste — no grinding needed, consistent color development