Synthesis of Complex Perovskite Oxides via Nanosheets Process

Keigo Inaba; Shinya Suzuki; Yuji Noguchi; Masaru Miyayama; Minoru Osada

doi:10.4028/www.scientific.net/KEM.350.55

Paper Titles

Preparation of Barium Titanate Nanoparticles Using Nano-Sized Oxalate and Deposition of their Nanoparticle Dense Films
p.39

Fabrication and Characterization of Alkoxy-Derived (Na, K)NbO₃ Series Powder
p.43

Dielectric Measurement for Barium Titanate Nanoparticles Using Far Infrared Reflection Method
p.47

The State and Optical Properties of Crystalline BaTiO₃ Nanoparticles Dispersed in Various Suspension Media
p.51

Synthesis of Complex Perovskite Oxides via Nanosheets Process
p.55

Control of Mesoscopic Particle Structure in Barium Titanate Nanoparticles and their Dielectric Properties
p.59

Ferroelectric Distortion in Bi₄Ti₃O₁₂ Studied by Neutron Powder Diffraction
p.65

Domain Dynamics of C-Axis Polarization in Bismuth Titanate Crystals
p.69

Electromechanical Poling Treatment of Barium Titanate Single Crystals and their Piezoelectric Properties
p.73

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Synthesis of Complex Perovskite Oxides via Nanosheets Process

Abstract:

Complex perovskite oxides of Sr0.5(Nb0.5Ta0.5)O3 were synthesized by reassembling (SrNb2O7)2− and (Sr1.5Ta3O10)2− nanosheets followed by topochemical dehydration with heat treatment. Atomic force microscopy (AFM) images showed that the thicknesses of the (SrNb2O7)2− and (Sr1.5Ta3O10)2− nanosheets were approximately 6 nm (7 unit layers) and 4 nm (3 unit layers), respectively. Raman scattering measurement has suggested that nanosheet-processed Sr0.5(Nb0.5Ta0.5)O3 with B-site-cation ordering has a superlattice-like structure composed of alternating layers of Sr0.5NbO3 and Sr0.5TaO3 along the c-axis. Nanosheet-processed Sr0.5(Nb0.5Ta0.5)O3 with B-site-cation ordering exhibited a dielectric permittivity of 42 (1 MHz), which was lower than that of solid-state-reacted samples (65) with disordered B-site cations.