Yellow Iron Oxide for Ceramic Coloring

Mastering the Spectrum of Ceramic Fire

Deqing Demi Pigment Technology Co., Ltd. provides the ceramic industry with precision-engineered yellow oxides. We recognize that in the kiln, "Yellow" is a delicate balance of chemistry and heat. Our ceramic-grade yellows are manufactured with low salt content to prevent glaze crawling or surface "shivering." We provide the "Thermal Foundation" that allows ceramicists to achieve consistent, high-quality results in both oxidized and reduced firing environments.

Ceramic Yellow Usage Areas

• Wall & Floor Tiles: Adding warmth to porcelain bodies and ceramic glazes.
• Sanitary Ware: Producing "Bone China" and "Ivory" surface effects.
• Artistic Pottery: Essential for traditional yellow slip decoration and earthy glazes.
• Kiln-Fired Bricks: Enhancing the natural yellow and buff tones of architectural clay.

Ceramic Yellow Technical Specs

Core Advantages

• Predictable Calcination: Transitions to a clean red/brown without muddying the glaze.
• High Purity: Low levels of Manganese and Chrome ensure bright, clear yellow tones.
• Fine Particle Size: Ensures easy dispersion in wet-milled glaze slurries.
• Chemical Compatibility: Stable with Lead, Boron, and Zirconium-based frits.

• Q: Does yellow oxide stay yellow after firing?

  A: No. Pure yellow iron oxide turns red above 300∘C. For a permanent yellow at 1200∘C, it must be reacted with Praseodymium or Zirconium, but our oxide is the ideal feedstock for these stains.

• Q: Is it suitable for third-fire decoration?

  A: Yes, its fine grind makes it perfect for low-temp overglaze colors.

Ceramic Lab Services

We offer "Firing Curve Analysis," showing how our yellow oxide behaves in your specific temperature ramp.

Custom Mineral Blends: We can provide pre-mixed "Buff" and "Straw" powders for large-scale brick and tile production.

The Science of Hydroxyl Release

The coloring mechanism of yellow iron oxide in ceramics is unique because of its "Hydrated Structure." As the kiln reaches 280∘C, the OH groups are driven off. The science lies in the "Pore Creation"—the space left by the water molecules determines how the resulting red iron particles interact with the glaze flux. Our ceramic grade is engineered to have a "Stable Dehydration Profile," ensuring that the color develops smoothly without causing microscopic bubbles or "gas-outs" in the glaze surface.