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Rapid heating of zirconia nanoparticle-powder compacts by infrared radiation heat transfer
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Number of Authors: 8
2017 (English)In: Journal of the European Ceramic Society, ISSN 0955-2219, E-ISSN 1873-619X, Vol. 37, no 3, 1067-1072 p.Article in journal (Refereed) Published
Abstract [en]

Homogeneous rapid sintering of nanoparticle powder compacts of yttria-stabilized zirconia was achieved by the radiation heat transfer. Green bodies were prepared by cold isostatic pressing (CIP) at various pressures providing different porosity of samples before sintering. Pressure-less sintering was performed in air at a heating rate of 100 degrees C/min up to the 1500 degrees C/1 min. Scanning electron microscopy, mercury intrusion porosimetry, and Archimedes technique were used to characterize the microstructure and to determine the density of the green and sintered bodies. Contrary to expectations, our results reveal opposite dependence of the green- and sintered densities on the CIP pressure. Since the whole sintering process does not exceed 10 min, to propose what processes are responsible for observed results, our attention is focused on the radiation heat transfer from furnace heating elements into the ceramics. Our arguments are supported by numerical calculations of the electromagnetic field enhancement in/between particles.

Place, publisher, year, edition, pages
2017. Vol. 37, no 3, 1067-1072 p.
Keyword [en]
Yttria-stabilized zirconia, Dielectric nanoparticle, Rapid sintering, Radiation heat transfer, Local electromagnetic field enhancement
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:su:diva-137551DOI: 10.1016/j.jeurceramsoc.2016.10.004ISI: 000389101300023OAI: oai:DiVA.org:su-137551DiVA: diva2:1064799
Available from: 2017-01-13 Created: 2017-01-09 Last updated: 2017-01-13Bibliographically approved

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Shen, Zhijian
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Department of Materials and Environmental Chemistry (MMK)
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