Sintered fused mullite 75% alumina


Made of fused mullite grains. Excellent creep resistance with vapour corrosion resistance at very high temperatures.

Typical application

BP MULLITE REC is dedicated to superstructure application. Due to its excellent creep resistance at very high temperature, BP MULLITE REC allows thicker insulation on crowns to reduce heat losses. Used in reinforcement and textile fiber glass furnaces as well as for vitroceramic and borosilicate glass furnaces.

If mortar is required, use BP MULLITE MORTAR.

Chemical and physical properties


BP MULLITE REC microstructure

Typical chemical composition


Typical crystallographic analysis

Main phase: mullite

Physical characteristics

DescriptionInternational standardsBritish standards
Refractoriness under load 0.2Mpa at 0.5%1,700°C3,092°F
Cold crushing strength130Mpa18,855psi
Coefficient of thermal expansion5.9 10-6K-13.3 10-6°F-1
Thermal conductivity at 1,000°C2.5 W.m-1.K-117.3 BTU
in hr-1ft-2°F-1
Creeping at 1,700°C under load 0.4Mpa 0-100h0.5%0.5%
Typical bulk density2.67g/cm3167pcf


The sintered fused mullite 75% alumina, BP MULLITE REC must be stored in a dry environment protected from weather conditions.

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Fused cast

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Excellent glass contact properties with extremely low defect potential.
High resistant to alkali vapor and creep for superstructure application.
Void-free structure enabling longer lifetime.


Sintered fused mullite 75% alumina

Made of fused mullite grains. High creep resistance with excellent vapour corrosion resistance.

Fused cast

Void-free electrofused alumina-zirconia-silica (AZS) with 36% zirconia and a low silicate phase (14%)

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