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Synthesis and characterization of lanthanum aluminate powders via a polymer complexing plus combustion route
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK). Kungliga Tekniska Högskolan.
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK). Kungliga Tekniska Högskolan.
2012 (English)In: Materials Chemistry and Physics, ISSN 0254-0584, E-ISSN 1879-3312, Vol. 132, no 2-3, 309-315 p.Article in journal (Refereed) Published
Abstract [en]

Lanthanum aluminate powders were prepared by a simple polymer complexing plus combustion method using PVA or PEG as complexing agent and fuel. The influence of different polymers on phase purity, powder morphology and sintering performance were investigated. Trace amount impurity La2O3 exists in the PEG powder, but it could be eliminated after high temperature sintering. The pure phase LaAlO3 can be easily obtained in PVA powders calcined at 950 degrees C even severe aggregation always exists. PEG shows advantages over PVA in terms of the densification and microstructure control during sintering process. The high relative density of 97.0% and homogeneous fine microstructure with grain size < 3 mu m can be obtained in the PEG-derived sample sintered at 1600 degrees C for 5 h. To obtain better quality LaAlO3 powders through combustion route, PEG is preferred over PVA.

Place, publisher, year, edition, pages
2012. Vol. 132, no 2-3, 309-315 p.
Keyword [en]
Lanthanum aluminate, Perovskite, PVA, PEG
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:su:diva-78435DOI: 10.1016/j.matchemphys.2011.11.019ISI: 000301083800013OAI: oai:DiVA.org:su-78435DiVA: diva2:539768
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3

Available from: 2012-07-05 Created: 2012-07-04 Last updated: 2017-12-07Bibliographically approved

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