Structure Phase Transition of Nanocrystalline Barium Titanate Doped with Lead Prepared by Sol-Gel Methods

Abstract

Abstract: Nanocrystalline (Ba,Pb)TiO₃ (5 mol% Pb) with various grain sizes were prepared by a sol-gel process. The gain size, structure and phase properties of nanocrystalline BPT were studied by TEM, XRD and DSC. The results show
that the structure phase transition is from ferroelectric tetragonal to paraelectric cubic phase and becomes more diffusive with decreasing particle size.
On the other hand, the ferroelectric orthorhombic to ferroelectric tetragonal phase transition disappears with increasing particle size, it means that the
formation of the unwanted orthorhombic phase of BaTiO₃ is inhibited.

Key words: sol-gel method, nanocrystalline, grain size, structure phase transition

CLC Number:

TF123

FAN Yang-Cai,JIANG Li-Li,TANG Xin-Gui,ZHOU Qi-Fa,ZHANG Jin-Xiu. Structure Phase Transition of Nanocrystalline Barium Titanate Doped with Lead Prepared by Sol-Gel Methods[J]. Journal of Inorganic Materials.

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Structure Phase Transition of Nanocrystalline Barium Titanate Doped with Lead Prepared by Sol-Gel Methods

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