Fused Mullite is produced by the electric furnace fusion of Bayer process alumina and high purity silica. The result is a needle-like alumina-silica grain that has low conductivity, excellent thermal shock resistance, and excellent resistance to deformation under load. Fused Mullite is used in applications such as refractories for glass and steel industries, as kiln furniture, in investment casting as shell building materials, in spark plug bodies, and many other applications.
Duramul E.G. is a fused, high purity mullite produced by the electric furnace fusion of Bayer process alumina and high purity silica. There is an excess of aluminum oxide above the normal mullite ratio (3 Al2O3 : 2 SiO2) to ensure that all of the SiO2 is contained within the mullite phase and is not present in the glass phase. Duramul receives high intensity magnetic treatment to remove virtually all of the magnetic iron present. Each lot is sampled and test fired to insure against contamination.
Duramul E.G. is utilized in the manufacture of refractory products where hot strength, resistance to spalling and low thermal conductivity are important factors. Such applications include setters and saggers for firing electronic substrates, spark plug bodies, and laboratory ware.
Duramul is a fused, high purity mullite produced by the electric furnace fusion of Bayer process alumina and high purity silica. There is an excess of aluminum oxide above the normal mullite ratio (3 Al2O3 : 2 SiO2) to ensure that all of the SiO2 is contained within the mullite phase and is not present in the glass phase. Duramul receives high intensity magnetic treatment to remove virtually all of the magnetic iron present.
Duramul is utilized in the manufacture of refractory products where hot strength, resistance to spalling, and low thermal conductivity are important factors.
Duramul ZR is a fused, high purity zirconia-mullite grain is produced by the electric furnace fusion of Bayer process alumina and zircon sand. During melting, the zircon and alumina react to yield a mixture of mullite and zirconia.