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Report No.

Growth mechanism of KNbO$$_3$$ nano crystals

Yoneda, Yasuhiro; Kunisada, Ryoichi*; Ueno, Shintaro*; Fujii, Ichiro*; Wada, Satoshi*

The high-energy X-ray diffraction experiments of KNbO$$_3$$ nanocrystals were carried out. Although Scherrer's equation may be used in estimating the particle diameters, in practical use there are various restrictions. In this study, we used KNbO$$_3$$ nanocrystals synthesized by a solvothermal method with a cubic shape. The crystal structure were a cubic structure because of the small particle size, it can be said that the KNbO$$_3$$ sample is an ideal to apply the Scherrer's equation. The crystal growth proceeds with the reaction time was investigated the kinetics of crystal growth. The short-range order structure was also observed, which was directly determined in the real space from the atomic pair-distribution distribution function method. It was found that the initial growth of KNbO$$_3$$ nano crystal was suppressed because of lattice defects.



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