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Two-stage master sintering curve applied to two-step sintering of oxide ceramics
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
2013 (English)In: Journal of the European Ceramic Society, ISSN 0955-2219, Vol. 33, no 12, 2275-2283 p.Article in journal (Refereed) Published
Abstract [en]

Tetragonal (3 mol% Y2O3) and two cubic zirconia (8 mol% Y2O3) as well as alumina green bodies were used for the construction of the Master Sintering Curve (MSC) created from sets of constant-rate-of-heating (CRH) sintering experiments. The activation energies calculated according to the MSC theory were 770 kJ/mol for Al2O3, 1270 kJ/mol for t-ZrO2, 620 kJ/mol and 750 kJ/mol for c-ZrO2. These values were verified by an alternative approach based on an analysis of the densification rate in the intermediate sintering stage. The MSCs established from the Two-Step Sintering (TSS) experiments showed at high densities a significant deflection from those constructed from the CRH experiments. This deflection was explained by lower sintering activation energy in the closed porosity stage. A new two-stage MSC model was developed to reflect the change in sintering activation energy and to describe TSS. The efficiency of TSS of four materials under investigation was correlated with their activation energies during the final sintering stage.

Place, publisher, year, edition, pages
2013. Vol. 33, no 12, 2275-2283 p.
Keyword [en]
Zirconia, Alumina, Sintering, Master sintering curve, Activation energy
National Category
Materials Engineering
URN: urn:nbn:se:su:diva-92375DOI: 10.1016/j.jeurceramsoc.2013.01.020ISI: 000320749300010OAI: diva2:638695
Swedish Research Council, 621-2008-5730


Available from: 2013-08-01 Created: 2013-08-01 Last updated: 2013-08-05Bibliographically approved

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Shen, Zhijian James
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