Cobalt Oxide Blue Ceramic Colorant
CAS Number: 1307-96-6
Cobalt oxide (CoO) is the most powerful and stable blue colorant for ceramic glazes and bodies, stable across both oxidizing and reducing atmospheres at all normal firing temperatures. At 0.2–0.5%, CoO produces intense cobalt blue in clear glazes; at higher concentrations it yields navy and black tones. Widely used in underglaze decoration, blue-and-white porcelain, and cobalt-blue frit production.
Technical Specifications
| appearance | Black or dark grey fine powder |
| purity (%) | ≥99 |
| moisture (%) | ≤0.5 |
| CoO content (%) | ≥99 |
| D50 particle size (µm) | 1.0–5.0 |
Applications
- Blue colorant in ceramic glazes and glass frits
- Underglaze colorant for blue-and-white porcelain decoration
- Colorant in cobalt blue ceramic body stains
- Dopant in CoFe2O4 ferrite ceramic magnets
- Component in thermal indicator ceramic paints
Key Features
- Unmatched color stability across oxidizing and reducing kiln atmospheres
- Extremely powerful colorant requiring very low dosage (0.2–0.5%)
- Produces consistent, reproducible blue tones across a wide firing range
- Compatible with all common glaze systems from earthenware to porcelain
Send Inquiry
CAS Number
1307-96-6
Category
Ceramic / Glass AdditivesAvailability
In StockSample
Dispatched within 5 days
More in Ceramic / Glass Additives
Acrylic Ceramic Binder (PAA)
9003-01-4
Alumina Fiber Ceramic Composite Reinforcement
1344-28-1
Ammonium Polyacrylate Ceramic Deflocculant
9003-04-7
Ammonium Polymethacrylate Ceramic Deflocculant (Darvan Type)
Barium Carbonate for BaTiO3 Ceramics
513-77-9
Bismuth Oxide Ceramic Flux and Dopant
1304-76-3
Borosilicate Glass Frit for Ceramics
65997-17-3
Calcined Kaolin (Metakaolin) Ceramic Filler
1332-58-7