Cordierite, Mullite and Silicon Carbide play an important role in refractories, as follows:

1. Cordierite
*Characteristics*: low thermal expansion coefficient, good thermal shock resistance, high temperature resistance.
*Application*: used in kiln furniture, refractory bricks, etc., suitable for occasions with frequent temperature changes.

2. Mullite
*Characteristics*: high melting point, good mechanical strength and creep resistance.
*Application*: widely used in high-temperature industrial equipment such as refractory bricks and castables.

3. Silicon Carbide
*Characteristics*: high hardness, excellent thermal conductivity, good wear resistance and thermal shock resistance.
*Application*: used in high-temperature kiln furniture, wear-resistant parts and high-temperature furnace linings.