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              Alumina Bubble
              Addtime:2011/10/21 15:38:39   Hit:0   Add to Favorites

              Alumina Bubble

                    The alumina bubble produced by our company is a hollow spherulitic heat-insulating meterial, which is made by electrofused method. It is noted for its light-weight, heat-resistance, close pore. It is an ideal filler for high-temperatuerfurnaces and excellent aggregate of light weight castable refractory.it is also and ideal heat-insulating and energy-saving refractory.
                                                      Index
              Properties
              Alumina Bubble
              Guarantee value
              Typical Value
               
              Chemical
              composition
              Al2O3
              ≥98.5
              99.2
              SiO2
              ≤0.2
              0.18
              Fe2O3
              ≤0.15
              0.10
              NaO
              ≤0.4
              0.3
              Packing density(g/cm3
              0.5-1.0
              0.85
              Damaged rate (%)
              ≤15
              12
              Refractoriness (℃)
              1790
              Grain Size: (mm)
              0.25-5,0.2-1,1-3,3-5,