NDLI: Non-isothermal crystallization kinetics of the BaTiO$_{3}$-KNbO$_{3}$-SiO$

Content Provider	Springer Nature Link
Author	Yang, H. Y. Yang, Y. S. Choi, H. W.
Copyright Year	2015
Abstract	We have investigated the non-isothermal formation kinetics of nanocrystals from the BaTiO$_{3}$-KNbO$_{3}$-SiO$_{2}$ (BKSO) glass at temperatures from room temperature to 800 °C. The thermal characteristics and the structural transformations of the BKSO glass have been studied by means of a differential thermal analysis and X-ray diffraction. The crystallization of BKSO glass is found to accompany a single-step occurrence of a tetragonal Ba$_{3}$TiNb$_{4}$O$_{15}$ nanocrystal structure. During the crystallization, a nanocrystals with a size of ∼40 nm at the initial stage grow with increasing temperature and reach a size of ∼120 nm by the time the crystallization finishes. We use the non-isothermal model of Johnson-Mehl-Avrami-Kolmogorov to characterize the kinetics of the crystallization process for the BKSO glass. The Avrami exponent of 3.5 indicates that the crystallization mechanisms is an increasing nucleation rate with diffusion-controlled growth. In the view of applications, providing information on how to control the size of nanograins systematically by simply controlling the annealing temperature of the glass state, as described in this study, should be useful.
Starting Page	1125
Ending Page	1129
Page Count	5
File Format	PDF
ISSN	03744884
Journal	Journal of the Korean Physical Society
Volume Number	66
Issue Number	7
e-ISSN	19768524
Language	English
Publisher	The Korean Physical Society
Publisher Date	2015-04-16
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	BaTiO$_{3}$-KNbO$_{3}$-SiO$_{2}$ glass Theoretical, Mathematical and Computational Physics Non-isothermal crystallization Nanocrystal Physics Particle and Nuclear Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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