Durability, Weight, and Cost—What to Know Before You Specify
Kiln furniture isn’t flashy. But for refractories leaders serving ceramic producers, tile manufacturers, or specialty glass makers, it’s foundational. Poor material choice leads to cracked setters, warped beams, and expensive downtime.
This guide explores the top kiln furniture materials—and when to use each—for performance, cost control, and supply continuity.
1. Cordierite
Max Temp: ~1350°C
Pros: Lightweight, affordable, good thermal shock resistance
Cons: Brittle under mechanical load, not suited for >1300°C
Best For: Sanitaryware, structural ceramics, biscuit firing
2. Mullite
Max Temp: ~1600°C
Pros: High thermal stability, better mechanical strength
Cons: Heavier than cordierite, more costly
Best For: Tableware, dense load supports, base setters
3. Silicon Carbide (Oxide/Nitride Bonded)
Max Temp: 1500–1700°C
Pros: Excellent thermal conductivity, lightweight, durable under cycling
Cons: Higher cost, some oxidation at very high temps
Best For: Fast firing kilns, roller hearth systems, sintered abrasives
4. High Alumina (>85%)
Max Temp: ~1700°C
Pros: Good load-bearing, strong under heat
Cons: Lower thermal shock resistance; expensive
Best For: Heavy-load applications, crucibles, or kiln cars
5. Fused Silica (Niche)
Max Temp: ~1050°C
Pros: Best thermal shock resistance
Cons: Low strength, limited temp range
Best For: Quartz glass annealing or fast-fire cycle furniture
Procurement Framework
✅ Match by:
Firing temperature profile
Weight of fired product per setter or plate
Kiln cycling frequency
Atmosphere (oxidizing/reducing)
✅ Avoid:
Over-specifying to gain “safety” buffer
Underestimating cumulative fatigue from cycling
Choosing cheapest option without modeling wear rate
Conclusion
Kiln furniture is a cost center until it breaks—then it’s a production liability. For refractories executives, material knowledge and proper grade selection drive product reliability and customer retention. Make your spec work smarter than your price sheet.
