Sol–Gel Preparation of BaTi4O9 and Ba2Ti9O20 |
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| Authors: | Yebin Xu Xiang Ming Chen Liangbin Wang |
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| Affiliation: | State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People's Republic of China;Department of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, People's Republic of China;Structure Research Laboratory, University of Science and Technology, Hefei, Anhui, 230026, People's Republic of China |
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| Abstract: | BaTi4O9 and Ba2Ti9O20 precursors were prepared via a sol–gel method, using ethylenediaminetetraacetic acid as a chelating agent. The sol–gel precursors were heated at 700°–1200°C in air, and X-ray diffractometry (XRD) was used to determine the phase transformations as a function of temperature. Single-phase BaTi4O9 could not be obtained, even after heating the precursors at 1200°C for 2 h, whereas single-phase Ba2Ti9O20 (as determined via XRD) was obtained at 1200°C for 2 h. Details of the synthesis and characterization of the resultant products have been given. |
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| Keywords: | sol-gel barium titanate phase transformations |
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