Abstract
Temperature dependence of phase composition and phase transition in the BaTiO3 nanotube arrays were examined by x-ray diffraction and Raman analyses. The BaTiO3 nanotube arrays exhibited a distinct phase transition behavior from −190 to 300 °C. Tetragonal phase was found to coexist with cubic phase in the BaTiO3 nanotube arrays above Curie temperature. The inner stress as well as size effect in the BaTiO3 nanotube arrays is responsible for the diffuse ferroelectric phase transition and the formation of multiphases coexistence at high temperature.
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