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Homogeneous nucleation of corundum nanocrystallites by rapid heating of aluminum formate hydroxide-based precursor powder.

Abstract：

:The high density nucleation of α-Al2O3 nanocrystallites was observed by rapid heating of the aluminum formate hydroxide-based precursor powder at 1200 °C for 50 s. The nucleation of α-Al2O3 nanocrystallites with less 10 nm in size from high purity aluminum oxide matrix has not been observed to our knowledge. Based on the results of XRD and TEM, α-Al2O3 nanocrystallites nucleated from the amorphous phase which formed after thermal decomposition of the precursor powder. Subsequently, α-Al2O3 with hollow rod-like morphology formed through coalescence and growth of nanocrystallites after heating at 1200 °C for 1 min. The results obtained in this paper indicates a possible beneficial effect of the rapid heating and cooling of the aluminum formate hydroxide-based precursor powder on the precipitation of α-Al2O3 nanocrystallites.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Yoshida M,Kato Y,Oumi Y,Sakurada O,Tanaka M,Wada M,Kitaoka S

doi

10.1038/s41598-019-51156-2

subject

Has Abstract

pub_date

2019-10-17 00:00:00

pages

14889

issue

1

issn

2045-2322

pii

10.1038/s41598-019-51156-2

journal_volume

9

pub_type

杂志文章

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