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Investigation of Phase Transition for BaTiO 3 Nanoparticles Using a Laboratory-Grade High-Temperature X‑ray
Tetsuhiro Katsumata1, Hiroshi Takashima2, Takumi Ono3
1Department of Chemistry, School of Science, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 259-1292, Japan.
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BaTiO3 (BTO) nanoparticles with a size of 12 nm were prepared, and their phase transition behavior was investigated using a laboratory-grade high-temperature X-ray diffractometer. The {111}, {200}, and {220} reflections were measured carefully, and Full Width at Half Maximum (fwhm) of these reflections was estimated. As a result, the fwhm of the {200} reflections decreased with increasing temperature and remained constant above the phase transition temperature. In contrast, the fwhm of the {111} reflections remained unchanged over the temperature range from room temperature to 600 °C. These results indicate that the structure of BTO nanoparticles with a size of 12 nm transforms from tetragonal to cubic at the phase transition temperature, and the phase transition of BTO nanoparticles can be detected using a laboratory-grade high-temperature X-ray diffraction apparatus by comparing the variation of fwhm with temperature.
