PROCESSING OF TITANIA NANOCERAMICS VIA CONVENTIONAL SINTERING, TWO-STEP SINTERING AND TWO-STEP SINTERING ASSISTED BY PHASE TRANSFORMATION

The novel technique of two-step sintering was applied to TiO2 ceramic nanopowder to suppress accelerated grain growth during densification. A dense, uniform and ultrafine-grain ceramic could be fabricated at a temperature lower than that of conventional methods. While the grain size is about 2 micro...

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Bibliographic Details
Published inCeramic Engineering and Science Proceedings pp. 41 - 47
Main Authors Hesabi, Z R, Mazaheri, M
Format Journal Article
LanguageEnglish
Published 2010
Subjects
Ceramics
Grain size
Nanocomposites
Nanomaterials
Nanostructure
Phase transformations
Sintering
Titanium dioxide
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Summary:The novel technique of two-step sintering was applied to TiO2 ceramic nanopowder to suppress accelerated grain growth during densification. A dense, uniform and ultrafine-grain ceramic could be fabricated at a temperature lower than that of conventional methods. While the grain size is about 2 micron for fully dense structures produced by conventional sintering, application of two-step sintering led to a remarkable reduction in grain size to about 250 nm. Two-step sintering accompanied by anatase to rutile phase transformation led to the formation of a structure with an average grain size of about 100 nm.
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ISBN:0470594748
9780470594742
ISSN:0196-6219
DOI:10.1002/9780470944080.ch5