Synthesis of complex perovskite oxides via nanosheets process

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

doi:10.4028/0-87849-449-9.55

Synthesis of complex perovskite oxides via nanosheets process

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

Research output: Contribution to journal › Article

Abstract

Complex perovskite oxides of Sr_0.5(Nb_0.5Ta _0.5)O₃ were synthesized by reassembling (SrNb ₂O₇)^2- and (Sr_1.5Ta ₃O₁₀)^2- nanosheets followed by topochemical dehydration with heat treatment. Atomic force microscopy (AFM) images showed that the thicknesses of the (SrNb₂O₇)^2- and (Sr_1.5Ta₃O₁₀)^2- nanosheets were approximately 6 nm (7 unit layers) and 4 nm (3 unit layers), respectively. Raman scattering measurement has suggested that nanosheet-processed Sr _0.5(Nb_0.5Ta_0.5)O₃ with B-site-cation ordering has a superlattice-like structure composed of alternating layers of Sr_0.5NbO₃ and Sr_0.5TaO₃ along the c-axis. Nanosheet-processed Sr_0.5(Nb_0.5Ta _0.5)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.

Original language	English
Pages (from-to)	55-58
Number of pages	4
Journal	Key Engineering Materials
Volume	350
DOIs	https://doi.org/10.4028/0-87849-449-9.55
Publication status	Published - 2007
Externally published	Yes

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Keywords

Complex perovskite oxides
Dielectric permittivity
Nanosheets
Reassembled material

ASJC Scopus subject areas

Ceramics and Composites
Chemical Engineering (miscellaneous)

Cite this

Inaba, K., Suzuki, S., Noguchi, Y., Miyayama, M., & Osada, M. (2007). Synthesis of complex perovskite oxides via nanosheets process. Key Engineering Materials, 350, 55-58. https://doi.org/10.4028/0-87849-449-9.55

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abstract = "Complex perovskite oxides of Sr0.5(Nb0.5Ta 0.5)O3 were synthesized by reassembling (SrNb 2O7)2- and (Sr1.5Ta 3O10)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 Sr 0.5(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(Nb0.5Ta 0.5)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.",

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author = "Keigo Inaba and Shinya Suzuki and Yuji Noguchi and Masaru Miyayama and Minoru Osada",

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AU - Inaba, Keigo

AU - Suzuki, Shinya

AU - Noguchi, Yuji

AU - Miyayama, Masaru

AU - Osada, Minoru

PY - 2007

Y1 - 2007

N2 - Complex perovskite oxides of Sr0.5(Nb0.5Ta 0.5)O3 were synthesized by reassembling (SrNb 2O7)2- and (Sr1.5Ta 3O10)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 Sr 0.5(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(Nb0.5Ta 0.5)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.

AB - Complex perovskite oxides of Sr0.5(Nb0.5Ta 0.5)O3 were synthesized by reassembling (SrNb 2O7)2- and (Sr1.5Ta 3O10)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 Sr 0.5(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(Nb0.5Ta 0.5)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.

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KW - Dielectric permittivity

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KW - Reassembled material

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10.4028/0-87849-449-9.55