Synthesis of highly tetragonal BaTiO3 nanopowders by a two-step alkoxide-hydroxide route
- Authors
- Joung, Mi-Ri; Kim, Jin-Seong; Song, Myung-Eun; Choi, Jae-Hong; Nahm, Sahn; Choi, Chang-Hak; Sung, Tae-Hyun
- Issue Date
- Sep-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://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/167699
- 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.
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