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Effects of granule density on strength and granule related defects in zirconia
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
2012 (English)In: Journal of the European Ceramic Society, ISSN 0955-2219, Vol. 32, no 11, 2653-2659 p.Article in journal (Refereed) Published
Abstract [en]

A suspension of zirconia powder (TZ3YSE) with a solids loading of 50 vol% was prepared by ball milling. Binders were added and some of the suspension was diluted to 40, 30 and 20 vol% before freeze granulation was performed. A spray dried material (TZ3YSEB) was used as a reference. The pore size distribution of the different granules was evaluated and from the microstructure it was shown that inhomogeneities were present in both the freeze granulated as well as in the spray dried granules. In addition, the density, microstructure as well as the strength of sintered materials prepared from the granules were studied. The results showed that a high green density or sintered density was not sufficient in order to achieve a high strength material. It was further shown that the strength was significantly influenced by the granule density and not by the inhomogeneities found in the granules.

Place, publisher, year, edition, pages
2012. Vol. 32, no 11, 2653-2659 p.
Keyword [en]
Granule density, Freeze granulation, Defects, Mechanical properties, Zirconia, Microstructures, Dental ceramics
National Category
Materials Chemistry
URN: urn:nbn:se:su:diva-80602DOI: 10.1016/j.jeurceramsoc.2012.02.059ISI: 000306247200011OAI: diva2:557646


Available from: 2012-09-28 Created: 2012-09-25 Last updated: 2012-09-28Bibliographically approved

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Shen, Zhijian
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