Compacting and densification of TiO2 nanoparticles

This work investigated the compacting and densification behaviour of TiO2 nanoparticles prepared by the simple non-aqueous sol-gel process. The synthesized nanopowder has anatase TiO2 structure with the average crystallite size of 10 nm and agglomerated particles. The compressibility curve shows two...

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Bibliographic Details
Published inProcessing and Application of Ceramics Vol. 11; no. 2; pp. 93 - 99
Main Authors Alvarez, Roca, Leite, Edson, Longo, Elson
Format Journal Article
LanguageEnglish
Published University of Novi Sad 01.01.2017
Subjects
agglomerates
nanopowders
sintering
titania
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Summary:This work investigated the compacting and densification behaviour of TiO2 nanoparticles prepared by the simple non-aqueous sol-gel process. The synthesized nanopowder has anatase TiO2 structure with the average crystallite size of 10 nm and agglomerated particles. The compressibility curve shows two well-defined linear parts that intersect at ~380MPa which is a measure of agglomerate compressive strength. The densification process was investigated by the dilatometric analysis using non-isothermal experiments. The apparent activation energy for the densification was calculated (88-102 kJ/mol). Grain rearrangement by grain boundary sliding was proposed as the dominant shrinkage mechanism. nema
ISSN:1820-6131
2406-1034
DOI:10.2298/PAC1702093R