Densification Studies of Ceramic Powder Compacts by Quasi-Isothermal Dilatometry
Quasi-isothermal dilatometry (QID) is a new technique which can be used with great advantage in sintering studies of powder compacts. Contrary to conventional dilatometric measurements the optimum heating rate can be determined in a single run by this technique and from the measured shrinkage curve the controlling sintering mechanism and its activation energy can be determined. In this paper the advantaae of this method is demonstrated and a method is given for calculating the activation energies from the QID curves. As an example the curves obtained in sintering studies of CeO2-Gd2O3 compacts are analysed and the kinetic data for the different stages involved in the sintering are determined.
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