Fabrication of porous alumina ceramics from powder mixtures with sol-gel derived nanometer alumina: Effect of mixing method

Kritikaki, A; Tsetsekou, A

dc.contributor.author	Kritikaki, A	en
dc.contributor.author	Tsetsekou, A	en
dc.date.accessioned	2014-03-01T01:30:35Z
dc.date.available	2014-03-01T01:30:35Z
dc.date.issued	2009	en
dc.identifier.issn	0955-2219	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19604
dc.subject	γ-Alumina	en
dc.subject	Bending strength	en
dc.subject	Densification	en
dc.subject	Nanopowder	en
dc.subject	Porosity	en
dc.subject	Sol-gel	en
dc.subject.classification	Materials Science, Ceramics	en
dc.subject.other	Alumina powders	en
dc.subject.other	Boehmite sols	en
dc.subject.other	matrixes	en
dc.subject.other	Mixing methods	en
dc.subject.other	Nano aluminas	en
dc.subject.other	Nano materials	en
dc.subject.other	Nanopowder	en
dc.subject.other	Open porosities	en
dc.subject.other	Porous aluminas	en
dc.subject.other	Porous ceramics	en
dc.subject.other	Powder mixtures	en
dc.subject.other	Sol state	en
dc.subject.other	Sol-gel	en
dc.subject.other	Systematic studies	en
dc.subject.other	Ceramic materials	en
dc.subject.other	Gelation	en
dc.subject.other	Gels	en
dc.subject.other	Nanoparticles	en
dc.subject.other	Nanostructured materials	en
dc.subject.other	Porosity	en
dc.subject.other	Powders	en
dc.subject.other	Sol-gel process	en
dc.subject.other	Sol-gels	en
dc.subject.other	Sols	en
dc.subject.other	Bending strength	en
dc.title	Fabrication of porous alumina ceramics from powder mixtures with sol-gel derived nanometer alumina: Effect of mixing method	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.jeurceramsoc.2008.10.011	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.jeurceramsoc.2008.10.011	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	This work concerns a systematic study investigating the effect on microstructure, porosity and bending strength of the addition of small amounts of very fine sol-gel derived nanoalumina on a micron-sized alumina powder for the production of highly porous ceramics. Different ways of mixing, with the nanomaterial being either in powder form (gamma-alumina) or in sol state (boehmite sol), were investigated for this purpose. It was observed that when small amounts of nanomaterial (4-6 wt%) are added both the bending strength and open porosity increase to a level depending significantly on mixing method and level of dispersion of nanoparticles into the coarse matrix. The increase in strength can reach 100% in case the nanomaterial is added in powder form and 500% in case of mixing in sol state. (C) 2008 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Journal of the European Ceramic Society	en
dc.identifier.doi	10.1016/j.jeurceramsoc.2008.10.011	en
dc.identifier.isi	ISI:000266057700007	en
dc.identifier.volume	29	en
dc.identifier.issue	9	en
dc.identifier.spage	1603	en
dc.identifier.epage	1611	en