Manganese Dioxide Brown Ceramic Colorant
CAS Number: 1313-13-9
Manganese dioxide (MnO2) is a brown-to-black ceramic colorant and flux modifier used in earthenware, stoneware, and porcelain glazes and bodies. At 2–5%, MnO2 produces warm tan-to-brown tones; in combination with CoO it generates blue-grey and violet ceramic colors. MnO2 is also a key dopant in ZnO varistor compositions where it stabilizes grain boundary microstructure.
Technical Specifications
| appearance | Dark brown to black fine powder |
| purity (%) | ≥90 |
| moisture (%) | ≤1.0 |
| MnO2 content (%) | ≥85 |
| D50 particle size (µm) | 2.0–10.0 |
Applications
- Brown and black colorant in ceramic glazes and bodies
- Combined with CoO for blue-violet ceramic color effects
- Dopant in ZnO varistor ceramics for microstructure control
- Sintering aid in manganese-modified alumina ceramics
- Colorant in terracotta and decorative earthenware bodies
Key Features
- Produces warm earth brown tones attractive in natural and rustic ceramics
- Synergistic color development with CoO creating unique blue-violet shades
- Acts as mild flux reducing sintering temperature in ceramic bodies
- Cost-effective colorant with globally reliable supply
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CAS Number
1313-13-9
Category
Ceramic / Glass AdditivesAvailability
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