Chemical Name: COBALT BLUE
Synonyms: Cobalt blue pigment; Pigment blue 28
CAS No.: 1345-16-0
Molecular Formula: CoO·Al2O3
Molecular Weight: Null
Appearance: Powder
Cobalt Blue (CoAl₂O₄), CAS 1345-16-0, is a thermally stable inorganic pigment with exceptional chromatic properties. Key parameters:
Parameter | Cobalt Blue | Alternative Pigments |
---|---|---|
Molecular Weight | 176.89 g/mol | Ultramarine: 862.56 g/mol |
Melting Point | >1200°C | Phthalo Blue: 450-500°C |
Lightfastness | ASTM I (Excellent) | Organic Pigments: ASTM III-IV |
pH Stability | 4-12 | Cerium Pigments: 6-9 |
Premium applications across industries:
Optimal implementation protocols:
Typical production workflows:
Ceramic Tile Manufacturing:
Blending → Spray Drying → Pressing → Firing (1250°C/6h) → Quality Inspection
Marine Coatings:
Resin-pigment premix → High-shear dispersion → Spray application → Thermal curing
Case 1: Porcelanosa Group (Spain)
Application: High-end ceramic wall cladding
Results: 35% reduction in kiln rejection rates vs. previous pigments
Case 2: BASF Coatings (Germany)
Application: Automotive metallic finishes
Results: Achieved ΔE<1 color stability after 3000h Xenon testing
Case 3: Yantai Paint Co. (China)
Application: Marine antifouling coatings
Results: 18% improvement in salt spray resistance (ASTM B117)
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