Abstract
The sintering rate for the initial stage of sintering was expressed as a function of temperature and relative density for two kinds of Al2O3 which differ in purity and mean particle size. Parameters in sintering rate equations were determined by sintering experiments under a uniaxial load. After it was confirmed that the remarkable grain growth was not observed in the temperature range of this experiment, sintering rate equations for two kinds of Al2O3 were determined. Calculated sintering rate gave fairly good agreement with the experimental data. Change in relative density during sintering were calculated and compared with experimental data. The difference between calculated values and experimental data remained less than 2% in all the cases. It became evident that change in density during the initial stage of sintering was able to predict for two kinds of Al2O3 with sintering rate equation based on visco-elastic analogy model.
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