Copper Oxide Ceramic Pigment and Dopant
CAS Number: 1317-38-0
Cupric oxide (CuO) is a ceramic colorant and functional dopant that produces green to black colors depending on glaze chemistry and firing atmosphere. In reduction firing, Cu2+ is partially reduced to Cu+, yielding copper-red glazes. CuO is also used as a sintering aid in mullite and alumina ceramics, as a p-type semiconductor in sensor applications, and as a catalyst in certain ceramic compositions.
Technical Specifications
| appearance | Black fine powder |
| purity (%) | ≥99 |
| moisture (%) | ≤0.5 |
| CuO content (%) | ≥99 |
| D50 particle size (µm) | 1.0–10.0 |
Applications
- Green to black colorant in ceramic glazes and bodies
- Source for copper-red reduction glazes in studio ceramics
- Dopant in ZnO varistor and electronic ceramic compositions
- Sintering aid in copper-doped mullite and alumina ceramics
- p-type semiconductor material for gas sensor ceramics
Key Features
- Versatile colorant producing green to black tones in different glaze systems
- Reduction-sensitive Cu2+ to Cu+ transition creates prized copper-red effects
- Low dosage (0.5–3%) achieves strong coloration in ceramic glazes
- Compatible with most ceramic raw materials and firing temperatures
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CAS Number
1317-38-0
Category
Ceramic / Glass AdditivesAvailability
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