Early-stage sintering in a powder compact of polyhedral particles II. Experimental analysis with a highly sinterable Al2O3

A model of early-stage sintering for polyhedral particles is examined with a highly sinterable Al₂O₃ powder. Combining of the initial and intermediate stages based on the model concerned describes quantitatively its sintering data such as power dependence of time and reduction in a specific surface area. Valid estimations of a model and/or mechanisms of sintering necessitate the accurate measurement of both shrinkage versus sintering time and specific surface area versus shrinkage.