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Construction of the master sintering curve for submicron size A-Al2O3 based on non-isothermal sintering containing lower heating rates only

100%

Shao W. , Chen S. , Li D. , Cao H. , Zhang S.

tom Vol. 27, No. 1

97--107

The master sintering curve (MSC) is quite useful for analyzing the shrinkage behaviour of ceramics. In this study, the shrinkage behaviour for ?-Al2O3 with a mean particle size of 350 nm during constantheating- rate sintering were evaluated based on the MSC theory. An MSC for the above powder has been constructed using dilatometry data containing heating rates lower than 5 °C/min only with the help of combined-stage sintering model. The validity of the MSC has been verified by a few experimental runs. A comparison between predicted and experimental shrinkage curves showed good consistency, thus confirming that it is possible to control shrinkage behaviour using the MSC. The concept of the MSC has been used to evaluate the apparent activation energy for the above powder, and a high value of 1035 kJ/mol was obtained.

Master Curve Model for Characterization of Decomposition and Densification Behavior of PbAlNbO3-PbZrTiO3 Ceramics

88%

Han J. S. , Park J. M. , Park S. J.

2020

tom Vol. 65, iss. 3

1099--1103

In this study, decomposition and densification behavior of PbAlNbO3-PbZrTiO3 (PAN-PZT) ceramics were characterized for powder injection molding process. Thermal gravity analysis and in-situ dilatometer experiment were carried out to construct master curve. Based on master curve model approach, one-combined master debinding curve (MDC) and master sintering curve (MSC) were constructed for piezoelectric PAN-PZT ceramics. Derived curves matched well with the experimental data. Process optimization and material development will be conducted based on characterization of master curve parameters.