High Purity Manganese Carbonate for Crystalline Glazes
Short Product Description
High Purity Manganese Carbonate for Crystalline Glazes is a controlled MnCO₃ material with stable manganese content (≥44%). It is suitable for ceramic glaze formulation, providing consistent color development and crystal formation behavior.
Technical Specifications
| Parameter | Typical Value |
|---|---|
| MnCO₃ Purity | ≥ 98% |
| Manganese (Mn) Content | ≥ 44% |
| Particle Size | 200–325 mesh |
| Moisture | ≤ 1.0% |
| Bulk Density | 0.9–1.2 g/cm³ |
| Solubility in Dilute Acid | ≥ 95% |
| Iron (Fe) | ≤ 0.05% |
| Calcium (Ca) | ≤ 0.3% |
| Magnesium (Mg) | ≤ 0.3% |
| Lead (Pb) | ≤ 10 ppm |
| Arsenic (As) | ≤ 5 ppm |
| Cadmium (Cd) | ≤ 5 ppm |
Key Features
High purity MnCO₃ ensures stable manganese oxide release during firing
Controlled Fe impurity minimizes color distortion and unwanted darkening
Low Ca and Mg content improves glaze clarity and crystal growth consistency
Fine particle size supports uniform dispersion in glaze slurry
Low heavy metals (Pb, Cd, As) for safer ceramic processing compliance
High Purity Manganese Carbonate for Crystalline Glazes provides predictable color and surface effects
Applications
Crystalline glaze formulation – supports controlled crystal growth and surface pattern development during cooling cycles
Ceramic glaze colorant – produces purple, brown, and plum tones depending on firing atmosphere
Porcelain and stoneware glazes – acts as a manganese source contributing to flux behavior and color development
Artistic ceramics – enables consistent aesthetic effects in decorative glaze systems
High-temperature glazes – decomposes to MnO, influencing glaze melt and crystallization behavior
Problems This Product Solves
Inconsistent glaze color → stable Mn content ensures repeatable color outcomes
Excess iron contamination → low Fe levels reduce unwanted darkening and impurity reactions
Poor crystal formation → controlled purity supports predictable crystalline glaze structures
Particle agglomeration → fine mesh size improves dispersion in glaze mixtures
Heavy metal concerns → low Pb, Cd, As supports safer ceramic material compliance
Packaging & Supply
25 kg kraft paper bags with PE liner
Palletized export packaging
Container shipment (20GP / 40HQ)
Sample availability for glaze testing
Customization & Technical Support
Adjustable Mn content based on glaze formulation needs
Low-iron (Fe) grade available for high-purity glaze systems
Custom particle size (mesh range) for slurry performance
Technical support for crystalline glaze formulation and firing optimization
FAQ
1. How does manganese carbonate affect crystalline glazes?
Manganese carbonate decomposes into MnO during firing, influencing both color and crystal formation. It contributes to nucleation and can enhance visual contrast in crystalline glaze systems.
2. Why is low iron (Fe) important in glaze-grade MnCO₃?
Iron impurities can darken glaze color and interfere with intended hues. Lower Fe levels ensure cleaner purple, brown, or plum tones in finished ceramics.
3. Is High Purity Manganese Carbonate for Crystalline Glazes different from MnO₂?
Yes. MnCO₃ is a milder colorant and requires higher addition levels compared to MnO₂, but it provides more controlled and stable results in some glaze systems .
4. Do Ca and Mg impurities affect glaze performance?
Yes. Excess Ca and Mg can alter melt viscosity and crystal growth behavior, leading to inconsistent glaze textures and reduced clarity.
5. What are the safety considerations for heavy metals like Pb?
Low Pb, Cd, and As levels are critical for compliance and safe handling in ceramic production. Controlled impurity levels reduce regulatory risks and contamination concerns.