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FUSED MULLITE AND SPINEL

2014-12-30

   

Fused Mullite Main Parameter

Properties

elct.melt.3Al2O3.2SiO2

 

Chemical
Composition(%)

 Al2O3

              70-77

 SiO2

              22-29

 Fe2O3

                                                      <0.10

 R2O

                                                      <0.5

 RO

             <0.3

Refractoriness (℃)

              >1850

Particle Bulk Density(g/cm3)

              >3.03

Linear Expansion Coefficient

               -6.0Χ10-6 /℃

Glass phase Content (%)

             ≤5-6 %

3Al2O3.2SiO2 Phase

             ≥94-95 %


Spinel and Al2O3-spinel were fused with Al2O3 content of 70% and 90% respectively are produced in by electronical fusing furnaces.   And it can be processed into the grains, the fine powders and the micro powders with different particle sizes.

Spinel property of index

Properties

      AM-70

      AM-90

Chemical

Composition (%)

    Al2O3
     MgO
     CaO
     SiO2
     Fe2O3

     69-76
     22-27
     ≤0.65
     ≤0.3
     ≤0.5

     88-91
     8-9
     ≤0.4
     ≤0.25
     ≤0.5

Grain Size (mm)

     3~5
     1~3
     0~1

     3~5
     1~3
     0~1

Fine powder(mesh)

80,100,240,320,etc.

80,100,240,320,etc.

Micro powder(μm)

   3~5     5~10

     3~5     5~10