Cordierite-mullite kiln furniture (saggers, shelves, posts and beams) combines low thermal expansion with high refractoriness under load, offering excellent thermal shock resistance and long service life for ceramic, electronic ceramic and magnetic material kilns.
| Service temperature | 1300～1400℃ |
|---|---|
| Thermal expansion (20–1000°C) | ≤ 2.0×10⁻⁶/℃ |
| Cold crushing strength | ≥ 50 MPa |
| Refractoriness under load | ≥ 1300℃ |
| Thermal shock resistance (1100°C water quench) | ≥ 10 次 |
| Bulk density | 2.1～2.5 g/cm³ |
Cordierite-mullite kiln furniture is a refractory kiln furniture product with cordierite (2MgO·2Al₂O₃·5SiO₂) and mullite as the main crystalline phases, combining cordierite's low thermal expansion and excellent thermal shock resistance with mullite's high refractoriness under load and good high-temperature strength. Produced as shelves, saggers, posts, beams and pusher plates, it is the core kiln furniture material for carrying products in ceramic, electronic ceramic and magnetic material kilns.
Cordierite has lower thermal expansion and better thermal shock resistance, suitable for kilns with frequent temperature changes and fast firing; mullite has higher refractoriness under load and greater high-temperature strength, suitable for heavy loads and higher temperatures. Cordierite-mullite composite furniture combines both advantages and is the mainstream general-purpose choice.
Standard cordierite-mullite kiln furniture serves at 1300–1400°C; special formulations can adapt to higher temperatures depending on conditions and custom design.
Yes. Henan Songrui New Refractory Materials Co., Ltd. supports custom shelves, posts, beams, saggers and other special-shaped kiln furniture according to kiln type, product size and loading method.
Service life depends on firing temperature, loading method and maintenance level; under normal use, shelves generally last from several months to over a year, and proper maintenance significantly extends life.
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