Synthesis and characterization of lanthanum aluminate powders via a polymer complexing plus combustion route
2012 (English)In: Materials Chemistry and Physics, ISSN 0254-0584, Vol. 132, no 2-3, 309-315 p.Article in journal (Refereed) Published
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 La 2O 3 exists in the PEG powder, but it could be eliminated after high temperature sintering. The pure phase LaAlO 3 can be easily obtained in PVA powders calcined at 950 °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 μm can be obtained in the PEG-derived sample sintered at 1600 °C for 5 h. To obtain better quality LaAlO 3 powders through combustion route, PEG is preferred over PVA.
Place, publisher, year, edition, pages
2012. Vol. 132, no 2-3, 309-315 p.
anthanum aluminate, PEG, Perovskite, PVA
IdentifiersURN: urn:nbn:se:kth:diva-14241DOI: 10.1016/j.matchemphys.2011.11.019ISI: 000301083800013ScopusID: 2-s2.0-84856596512OAI: oai:DiVA.org:kth-14241DiVA: diva2:331851
QC 20120327. Updated from submitted to published. Previous title: "Synthesis and characterisation of lanthanum aluminate powders via a polymer complexing plus combustion route" (obs, s -> z i characterisation)2010-07-272010-07-272012-04-02Bibliographically approved