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Synthesis of highly tetragonal BaTiO3 nanopowders by a two-step alkoxide-hydroxide route

Authors
Joung, Mi-RiKim, Jin-SeongSong, Myung-EunChoi, Jae-HongNahm, SahnChoi, Chang-HakSung, Tae-Hyun
Issue Date
15-9월-2011
Publisher
ELSEVIER SCIENCE SA
Keywords
Nanostructured materials; Chemical synthesis; Nanopowders
Citation
JOURNAL OF ALLOYS AND COMPOUNDS, v.509, no.37, pp.9089 - 9092
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF ALLOYS AND COMPOUNDS
Volume
509
Number
37
Start Page
9089
End Page
9092
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/111586
DOI
10.1016/j.jallcom.2011.06.052
ISSN
0925-8388
Abstract
BaTiO3 (BT) nanopowders were synthesized using the alkoxide-hydroxide route. Formation of BT nanopowders commenced at 60 degrees C and their amount increased with increasing temperature. However, a TiO2 second phase was always developed at temperatures higher than 100 degrees C due to the insufficient amount of H2O caused by its evaporation. Therefore, a two-step process is presented herein for the synthesis of homogeneous, highly tetragonal BT nanopowders. The cubic BT nanopowders were synthesized at 100 degrees C and subsequently heated to high temperatures (>200 degrees C) to increase their tetragonality. Homogeneous BT nanopowders with an average size of 94.8 nm and a high c/a ratio of 1.0081 were obtained for the specimens synthesized at 260 degrees C for 60 h after the formation of the cubic BT nanopowders at 100 degrees C for 20 h. (C) 2011 Elsevier B. V. All rights reserved.
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