Corundum Mullite Bricks

Corundum mullite bricks are characterized by high-temperature resistance, erosion resistance, chemical corrosion resistance, high cold crushing strength, high refractoriness under load, and good thermal shock stability. They are mainly applied in high-temperature kiln linings, ceramic kiln furniture, and other applications.

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Physical and Chemical Indicators

Item	GMZ-90	GMZ-85	GMZ-80	GMZ-75
Al₂O₃ (%)	≥ 90	≥ 85	≥ 80	≥ 75
Fe₂O₃ (%)	≤ 0.8	≤ 1.0	≤ 1.0	≤ 1.2
Apparent Porosity (%)	≤ 16	≤ 17	≤ 18	≤ 18
Bulk Density (g/cm³)	≥ 3.10	≥ 2.85	≥ 2.75	≥ 2.6
Cold Crushing Strength (MPa)	≥ 120	≥ 100	≥ 100	≥ 80
Refractoriness Under Load (0.2MPa, ℃)	≥ 1700	≥ 1680	≥ 1650	/
Permanent Linear Change (%) (1500℃×2h)	± 0.1	± 0.2	/	/
Thermal Shock Resistance (Cycles, 1100℃ water cooling)	≥ 30	≥ 30	≥ 30	/

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