Nanfeng Barium Sulfate Precipitated 400 Mesh for Industrial Applications

Product Overview‌

Nanfeng Precipitated Barium Sulfate 400 Mesh is a premium-grade, synthetic barium sulfate engineered through controlled precipitation and advanced micronization processes. Compliant with GB/T2899-2008 and global industrial standards, this ultra-fine powder (D50: 10–15 µm) delivers ‌97–98% purity‌, ‌4.50 g/cm³ density‌, and ‌1,580°C thermal stability‌, making it an indispensable functional filler for coatings, plastics, batteries, ceramics, and specialty chemical formulations.

With its orthorhombic crystal structure and optimized particle morphology, Nanfeng Barium Sulfate ensures:

• ‌Chemical Inertness:‌ Insoluble in water, ethanol, and acids (except hot concentrated H₂SO₄).
• ‌Low Oil Absorption (8–12 g/100g):‌ Reduces resin demand while enhancing coating rheology.
• ‌Anti-Settling Properties:‌ Non-sedimenting dispersion in both aqueous and solvent-based systems.
• ‌Halogen-Free Composition:‌ Ideal for eco-conscious formulations targeting REACH/ROHS compliance.

Certified under ISO 9001 and ISO 14001, Nanfeng Barium Sulfate is the sustainable choice for manufacturers prioritizing performance, cost efficiency, and regulatory alignment.

‌Key Features & Competitive Advantages‌

1. ‌Superior Functional Performance‌

   • ‌Optical Enhancement:‌ 95–97% ISO brightness ensures vibrant color development in coatings and plastics.
   • ‌Thermal Resilience:‌ Withstands sintering temperatures up to 1,580°C (ceramic glazes) and 600°C carbon reduction processes (battery cathode production).
   • ‌Corrosion Resistance:‌ Maintains integrity in pH 1–14 environments (ASTM D1308).

2. ‌Process Optimization‌

   • ‌High Loading Capacity:‌ Up to 40% filler incorporation in coatings without viscosity spikes (ASTM D2196).
   • ‌Grindability:‌ Achieves Hegman fineness ≥7 in 30–40 minutes (ASTM D1210).
   • ‌Dispersion Stability:‌ ≤0.5% sedimentation after 72h (ISO 1524).

3. ‌Sustainability & Safety‌

   • ‌Heavy Metal-Free:‌ Pb/Cd/As ≤5 ppm, compliant with EU Toy Safety Directive EN71-3.
   • ‌Low Dust Emission:‌ Granulated form with ≤0.1% respirable particles (OSHA 1910.1000).
   • ‌Carbon-Neutral Production:‌ 75% process water recycling and 50% renewable energy utilization.

‌Technical Specifications‌

‌Application-Specific Benefits‌

‌1. Coatings & Inks‌

• ‌Architectural Coatings:‌
  • Enhances TiO₂ efficiency (15–20% replacement) while maintaining 90+ contrast ratio (ASTM D2805).
  • Improves scrub resistance (≥8,000 cycles, ASTM D2486) and UV stability (QUV-A 1,500 hrs).
• ‌Industrial Coatings:‌
  • Reduces VOCs in solvent-based systems via low oil absorption.
  • Provides anti-corrosion properties in epoxy primers (salt spray resistance ≥1,200 hrs, ASTM B117).
• ‌Printing Inks:‌
  • Boosts ink gloss (60° GU ≥90) and print sharpness via optimized particle packing.
  • Stabilizes rheology for high-speed gravure printing (Brookfield viscosity ≤3,000 cP).

‌2. Plastics & Polymers‌

• ‌Engineering Plastics:‌
  • Increases PBT/PA66 tensile strength by 20–25% at 15% loading (ASTM D638).
  • Improves dimensional stability under thermal cycling (-40°C to 180°C).
• ‌PVC Products:‌
  • Reduces plasticizer migration by 30% in flexible PVC (ASTM D1203).
  • Enhances UV resistance for outdoor applications (ΔE ≤1.5 after 1,000 hrs Xenon exposure).
• ‌Specialty Compounds:‌
  • Flame-retardant synergist in halogen-free cables (UL94 V-0 achievable).
  • Anti-static agent for electronic packaging (surface resistivity: 10⁹–10¹¹ Ω/sq).

‌3. Battery & Ceramic Industries‌

• ‌Lithium-Ion Batteries:‌
  • Cathode expansion agent improving cycle life by 15–20% (2,000+ cycles @ 1C).
  • Enhances electrolyte wettability and ionic conductivity.
• ‌Advanced Ceramics:‌
  • Glaze component for high-gloss finishes (reflectance ≥85% @ 60°).
  • Reduces thermal expansion coefficient (CTE) in kiln-fired products.

‌4. Paper & Construction Materials‌

• ‌Paper Coating/Filling:‌
  • Achieves 90–92 ISO brightness with 10–15% basis weight reduction.
  • Improves printability and ink holdout (IGT pick test ≥1.5 m/s).
• ‌Building Materials:‌
  • Fire-resistant additive for gypsum boards (Class A ASTM E84).
  • Densifier for cementitious composites (compressive strength +25%).

‌Production Process & Quality Control‌

1. ‌Raw Material Sourcing:‌ High-purity barite ore (BaSO₄ ≥96%) and sulfuric acid (H₂SO₄ ≥98%).
2. ‌Precipitation Reaction:‌
   • BaS + H₂SO₄ → BaSO₄↓ + H₂S↑ (controlled pH/temperature for crystal growth).
3. ‌Washing & Purification:‌
   • 3-stage countercurrent washing to remove soluble impurities (Cl⁻ ≤50 ppm).
4. ‌Surface Modification:‌
   • In-situ stearic acid coating (0.5–1.0% w/w) for hydrophobic dispersion.
5. ‌Drying & Classification:‌
   • Spray drying + air-jet sieving to 400 mesh (D100 ≤45 µm).
6. ‌Quality Assurance:‌
   • ICP-OES for heavy metals (Pb/Cd/As ≤5 ppm).
   • SEM/EDS for particle morphology and purity analysis.
   • Batch-wise GB/T 2899-2008 certification.

‌Competitive Comparison: Nanfeng vs. Alternatives‌

‌Why Choose Nanfeng Barium Sulfate?‌

• ‌Technical Expertise:‌ 20+ years of R&D in precipitation and surface modification technologies.
• ‌Supply Chain Excellence:‌ 30,000-ton annual capacity with ≤10-day lead time globally.
• ‌Custom Solutions:‌ Tailored particle sizes (200–3,000 mesh) and coatings (silane, titanate).
• ‌Sustainability Leadership:‌ Zero wastewater discharge and 85% recycled packaging materials.

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