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White Fused Mullite buy in Zhengzhou
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White Fused Mullite

White Fused Mullite

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Description

White Fused Mullite is a first quality refractory material, composed of massive crystals of mullite which are formed during cooling after fusion. It confers high melting point, excellent thermal stability, low reversible thermal expansion, low porosity, high resistance to thermal shock and chemical corrosion at high temperatures.

In the sand casting industry, Fused Mullite can be used as special sand for core production. The use of this sand allows getting excellent surface properties, free of the veining defects typically produced by silica sand. Due to the high refractoriness, Fused Mullite is suitable for casting all type of metals and alloys.

In the investment casting process, Fused Mullite is used as flour or stucco for shell building (first coats and back-ups). It is also recommended for the production of ceramic cores.

Type

Item

Guarantee value Typical value
Chemical Composition (%) Al2O3 70-77 75.30
SiO2 22-29 24.08
Fe2O3 0.1 0.05
R2O3 0.5 0.18
RO 0.3 0.28
Mullite phase 3Al2O3·2SiO2(%) 95
Glass phase (%) 5
Linear expansion coefficient (1/) -6.0×10-6
Density of volume (g/cm3) 3.0
Refractoriness() 1840
Grain size (mm) 5-3 3-1 1-0
Color White or Grey
Packing 25kg/paper bag 1000kg/plastic bag
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White Fused Mullite
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