The Origin of the Ferroelectricity in the Bismuth Titanate Bi4Ti3O12 with Perovskite-Like Layered Structure

Joanna A. Bartkowska; Jolanta Dercz; Daniel Michalik

doi:10.4028/www.scientific.net/SSP.226.17

Paper Titles

Preface

Microstructure and Properties of Ti-47Al-2W-0.5Si Cast Alloy
p.3

Determination of Nickel in Welding Fume by Gravimetric Method Using Dimethylglyoxime
p.7

Estimation of Carbon Balance in Reaction Zones of a Submerged-Arc Furnace during Ferrosilicon Smelting
p.11

The Origin of the Ferroelectricity in the Bismuth Titanate Bi₄Ti₃O₁₂with Perovskite-Like Layered Structure
p.17

Thermal Stability of Ti-6Al-4V Alloy with Carbon Content
p.23

Biomechanical Analysis of Selected Endoprostheses of Hip Joint by Means of Finite Element Methods
p.29

Effect of Heat Treatment on the Microstructure and Mechanical Properties of Sintered Stainless Tool Steel
p.33

The Influence of Addition of the Rare Earth Elements on the Structure and Hardness of AlZn12Mg3.5Cu2.5 Alloy
p.39

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The Origin of the Ferroelectricity in the Bismuth Titanate Bi₄Ti₃O₁₂with Perovskite-Like Layered Structure

Abstract:

The goal of this study was to investigate the origin of ferroelectricity in Bi₄Ti₃O₁₂. The bismuth titanate Bi₄Ti₃O₁₂ (BTO), which belongs to the Aurivillius family, is one of the most interesting compounds among the bismuth-based layered ceramics. BTO is a ferroelectric material with wide applications in the electronic industry, as capacitors, transducers, memory devices and sensors. Aurivillius structures are described with a general formula following form:A_m-1Bi₂B_mO_3m-1. BTO ceramic materials is an Aurivillius structure with m = 3. This ceramic materials were prepared by conventional mixed-oxide method of the solid state reaction. The temperature of the Bi₄Ti₃O₁₂ sintering was selected on basis of thermogravimetric studies. The crystal structure of Bi₄Ti₃O₁₂ was examined at room temperature with an X-ray diffraction method. Phase formation behavior was investigated using the differential thermal analysis (DTA) and the thermal gravimetric (TG). The microstructure was investigated by SEM method. Based on the Dorrian’s model, the value of displacements between bismuth ions and oxygen octahedra was calculated.