Mullite

Description:
Mullite is a rare alumino-silicate ceramic compound, composed mainly of aluminum oxide (Al₂O₃) and silicon dioxide (SiO₂). It occurs naturally in high-temperature geological formations but is more commonly produced synthetically through controlled thermal processes. Mullite is prized for its exceptional thermal stability, low thermal conductivity, high refractoriness, and excellent mechanical strength at elevated temperatures.
Applications:
Mullite is widely used in industries requiring high-temperature resilience and chemical stability, including:
- Refractory industry:
Kiln linings, furnace bricks, insulating fire bricks
Foundry molds and slide gates
Ceramic and glass manufacturing:
Roller hearth kiln furniture
Saggars and crucibles - Investment casting:
Shell molds and cores
Electronic and electrical insulation materials - Advanced ceramics:
Substrates for semiconductors
High-performance filters and structural components
Key Features & Benefits:
a) Excellent thermal shock resistance
b) High mechanical strength at elevated temperatures
c) Good resistance to chemical attack
d) Stable phase up to 1800°C
e) Low creep and high load-bearing capacity
f) Low impurity levels for high-purity applications
Physical Properties:

Chemical Composition (Typical, % by weight):
