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Science of Sintering
The processes taking place during pressureless sintering of nano-metastable Al 2 O 3 , compacted up to high densities (0.7 of the theoretical density) using the magnetic pulsed method were studied. The influence of MgO, TiO 2 and ZrO 2 additives on the kinetics of Al 2 O 3 polymorphous transition, shrinkage and microstructure evolution during annealing at temperatures up to 1450°C has been studied. We have found that the process of annealing is two-staged starting with a polymorphousdoi:10.2298/sos0501035k fatcat:ze7omp6invf5xngveklfuazdqm