SIO-2 - PRNF STONEWARE CLAY BLACK 0-0.5 MM CHAMOTTE

Discover Sio-2 PRNF black refractory clay, perfect for artistic ceramics and sculpture. With 40% fine grog (0-0.5 mm), it offers excellent performance during drying and firing, giving your pieces a unique character.

Key Features:

• High grog content for superior drying and firing performance.
• Intense black color in oxidative firing, highly valued for artistic expression.
• Metallization effects with blue tones in a reducing atmosphere.
• Available in extruded plastic clay.
• Compatible with zinc-free (Zn) glazes to avoid unwanted reactions.

Technical Specifications:

• Firing Temperature: 1200-1260ºC
• Biscuit Temperature: 1000ºC
• Moisture: 21%
• Plasticity (IP Atterberg): 19
• Calcimetry (CaCO3): 0%
• Drying Shrinkage: 8.1%
• Firing Shrinkage at 1260ºC: 3.7%
• Porosity (water absorption) at 1260ºC: 8.8%
• Dry Mechanical Strength: 5.7 N/mm2
• Mechanical Strength at 1260ºC: 29.5 N/mm2
• Expansion Coefficient at 1260ºC (25-500ºC): 50.8x10^-7ºC^-1

Usage Recommendations:

• Avoid glazes with low expansion coefficients (a25-300ºC <60x10^-7ºC^-1).
• Consult your glaze supplier to ensure compatibility.