Mullite Bricks

Mullite bricks possess excellent high-temperature performance, high strength, high refractoriness under load, superior thermal shock resistance, and good chemical stability. They exhibit good corrosion resistance against acidic and low-alkaline slags.

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Physical and Chemical Indicators

Item	SM65	SM70	SM75	SM80
Al₂O₃ (%)	≥ 64	≥ 68	≥ 74	≥ 78
Fe₂O₃ (%)	≤ 1.2	≤ 1.2	≤ 0.8	≤ 0.6
Apparent Porosity (%)	≤ 18	≤ 18	≤ 18	≤ 17
Bulk Density (g/cm³)	≥ 2.45	≥ 2.50	≥ 2.60	≥ 2.75
Cold Crushing Strength (MPa)	≥ 55	≥ 60	≥ 65	≥ 70
Refractoriness Under Load (0.2MPa, ℃)	≥ 1560	≥ 1580	≥ 1650	≥ 1700
Permanent Linear Change (%) (1500℃×2h)	-0.4~+0.1	-0.3~+0.1	-0.2~+0.1	/

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