| 摘要 |
The title composition comprises 88-92 wt% alumina(Al2O3), 3-5 wt% silica(SiO2), 0.5-1.5 wt% magnesia(MgO), 0.5-1.5 wt% calcia(CaO), 1-3 wt% manganese oxide(MnO), 1-2 wt% chromia(Cr2O3) and 0.5-1 wt% zirconia(ZrO2). The used alumina powder has 70% of 2-4 microns size particles and 30% of 0.4-0.5 microns size particles, and the particle size of the silica is 1-3 microns. The total weight of MgO, CaO, MnO, Cr2O3 and ZrO2 is 5-7% with respect to the whole weight of the composition.
|
