Fabrication and characterization of colossal dielectric response of polycrystalline Ca1-xSrxCu3Ti4O 12 (0≤x≤1) ceramics

Sung Yun Lee; Duk Keun Yoo; Jihye Lee; William Jo; Youn Woo Hong; Young Hwan Kim; Sang Im Yoo

doi:10.1557/opl.2012.1071

Fabrication and characterization of colossal dielectric response of polycrystalline Ca_1-xSr_xCu₃Ti₄O ₁₂ (0≤x≤1) ceramics

Sung Yun Lee, Duk Keun Yoo, Jihye Lee, William Jo, Youn Woo Hong, Young Hwan Kim, Sang Im Yoo

Department of Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

We report the microstructures and dielectric properties of Ca _1-xSr_xCu₃Ti₄O₁₂ (C _1-xS_xCTO, 0≤x≤1) ceramics sintered at the various sintering temperatures ranging from 1000 to 1060°C in air. The linear increase in lattice parameter in C_1-xS_xCTO (0≤x≤1) ceramics is observable for the full range of substitution. However, the second phases of SrTiO₃ and CuO start to occur from the composition of x=0.8, implying that a stoichiometric SrCu₃Ti₄O ₁₂ (SCTO) compound may not exist. While the C_0.6S _0.4CTO and C_0.4S_0.6CTiO samples exhibit relatively lower dielectric constant (ε_r) of ∼40,000 below 1 kHz, the CaCu₃Ti₄O₁₂ (CCTO) and SCTO show the extremely high ε_r values of ∼120,000 and ∼180,000, respectively. Complex impedance (Z*) and modulus (M*) spectroscopy revealed that the capacitance (C) and resistivity (ρ) values of grain boundary in all samples are much higher than those of grains.

Original language	English
Title of host publication	Nanocomposites, Nanostructures and Heterostructures of Correlated Oxide Systems
Pages	81-87
Number of pages	7
DOIs	https://doi.org/10.1557/opl.2012.1071
State	Published - 2012
Event	2012 MRS Spring Meeting - San Francisco, CA, United States Duration: 9 Apr 2012 → 13 Apr 2012

Publication series

Name	Materials Research Society Symposium Proceedings
Volume	1454
ISSN (Print)	0272-9172

Conference

Conference	2012 MRS Spring Meeting
Country/Territory	United States
City	San Francisco, CA
Period	9/04/12 → 13/04/12

Access to Document

10.1557/opl.2012.1071

Cite this

Lee, S. Y., Yoo, D. K., Lee, J., Jo, W., Hong, Y. W., Kim, Y. H., & Yoo, S. I. (2012). Fabrication and characterization of colossal dielectric response of polycrystalline Ca_1-xSr_xCu₃Ti₄O ₁₂ (0≤x≤1) ceramics. In Nanocomposites, Nanostructures and Heterostructures of Correlated Oxide Systems (pp. 81-87). (Materials Research Society Symposium Proceedings; Vol. 1454). https://doi.org/10.1557/opl.2012.1071

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title = "Fabrication and characterization of colossal dielectric response of polycrystalline Ca1-xSrxCu3Ti4O 12 (0≤x≤1) ceramics",

abstract = "We report the microstructures and dielectric properties of Ca 1-xSrxCu3Ti4O12 (C 1-xSxCTO, 0≤x≤1) ceramics sintered at the various sintering temperatures ranging from 1000 to 1060°C in air. The linear increase in lattice parameter in C1-xSxCTO (0≤x≤1) ceramics is observable for the full range of substitution. However, the second phases of SrTiO3 and CuO start to occur from the composition of x=0.8, implying that a stoichiometric SrCu3Ti4O 12 (SCTO) compound may not exist. While the C0.6S 0.4CTO and C0.4S0.6CTiO samples exhibit relatively lower dielectric constant (εr) of ∼40,000 below 1 kHz, the CaCu3Ti4O12 (CCTO) and SCTO show the extremely high εr values of ∼120,000 and ∼180,000, respectively. Complex impedance (Z*) and modulus (M*) spectroscopy revealed that the capacitance (C) and resistivity (ρ) values of grain boundary in all samples are much higher than those of grains.",

author = "Lee, {Sung Yun} and Yoo, {Duk Keun} and Jihye Lee and William Jo and Hong, {Youn Woo} and Kim, {Young Hwan} and Yoo, {Sang Im}",

year = "2012",

doi = "10.1557/opl.2012.1071",

language = "English",

isbn = "9781605114316",

series = "Materials Research Society Symposium Proceedings",

pages = "81--87",

booktitle = "Nanocomposites, Nanostructures and Heterostructures of Correlated Oxide Systems",

note = "2012 MRS Spring Meeting ; Conference date: 09-04-2012 Through 13-04-2012",

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Lee, SY, Yoo, DK, Lee, J, Jo, W, Hong, YW, Kim, YH & Yoo, SI 2012, Fabrication and characterization of colossal dielectric response of polycrystalline Ca_1-xSr_xCu₃Ti₄O ₁₂ (0≤x≤1) ceramics. in Nanocomposites, Nanostructures and Heterostructures of Correlated Oxide Systems. Materials Research Society Symposium Proceedings, vol. 1454, pp. 81-87, 2012 MRS Spring Meeting, San Francisco, CA, United States, 9/04/12. https://doi.org/10.1557/opl.2012.1071

Fabrication and characterization of colossal dielectric response of polycrystalline Ca_1-xSr_xCu₃Ti₄O ₁₂ (0≤x≤1) ceramics. / Lee, Sung Yun; Yoo, Duk Keun; Lee, Jihye et al.
Nanocomposites, Nanostructures and Heterostructures of Correlated Oxide Systems. 2012. p. 81-87 (Materials Research Society Symposium Proceedings; Vol. 1454).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Jo, William

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N2 - We report the microstructures and dielectric properties of Ca 1-xSrxCu3Ti4O12 (C 1-xSxCTO, 0≤x≤1) ceramics sintered at the various sintering temperatures ranging from 1000 to 1060°C in air. The linear increase in lattice parameter in C1-xSxCTO (0≤x≤1) ceramics is observable for the full range of substitution. However, the second phases of SrTiO3 and CuO start to occur from the composition of x=0.8, implying that a stoichiometric SrCu3Ti4O 12 (SCTO) compound may not exist. While the C0.6S 0.4CTO and C0.4S0.6CTiO samples exhibit relatively lower dielectric constant (εr) of ∼40,000 below 1 kHz, the CaCu3Ti4O12 (CCTO) and SCTO show the extremely high εr values of ∼120,000 and ∼180,000, respectively. Complex impedance (Z*) and modulus (M*) spectroscopy revealed that the capacitance (C) and resistivity (ρ) values of grain boundary in all samples are much higher than those of grains.

AB - We report the microstructures and dielectric properties of Ca 1-xSrxCu3Ti4O12 (C 1-xSxCTO, 0≤x≤1) ceramics sintered at the various sintering temperatures ranging from 1000 to 1060°C in air. The linear increase in lattice parameter in C1-xSxCTO (0≤x≤1) ceramics is observable for the full range of substitution. However, the second phases of SrTiO3 and CuO start to occur from the composition of x=0.8, implying that a stoichiometric SrCu3Ti4O 12 (SCTO) compound may not exist. While the C0.6S 0.4CTO and C0.4S0.6CTiO samples exhibit relatively lower dielectric constant (εr) of ∼40,000 below 1 kHz, the CaCu3Ti4O12 (CCTO) and SCTO show the extremely high εr values of ∼120,000 and ∼180,000, respectively. Complex impedance (Z*) and modulus (M*) spectroscopy revealed that the capacitance (C) and resistivity (ρ) values of grain boundary in all samples are much higher than those of grains.

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SN - 9781605114316

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BT - Nanocomposites, Nanostructures and Heterostructures of Correlated Oxide Systems

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