Core-shell-structure Ag-BaTiO3 composite nanopowders prepared directly by flame spray pyrolysis

Seung Ho Choi; You Na Ko; Jung Kul Lee; Byung Kyu Park; Yun Chan Kang

doi:10.1016/j.matchemphys.2013.03.033

Core-shell-structure Ag-BaTiO₃ composite nanopowders prepared directly by flame spray pyrolysis

Seung Ho Choi, You Na Ko, Jung Kul Lee, Byung Kyu Park, Yun Chan Kang

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Core-shell-structure Ag-BaTiO₃ composite nanopowders are prepared directly by flame spray pyrolysis. The single-crystalline Ag was located in the core part of the composite powder, and the Ba and Ti components are uniformly distributed in the shell part. The X-ray diffraction (XRD) patterns of the Ag-BaTiO₃ composite powders have the main crystal peaks of Ag and broad peaks at around 28. The Ag-BaTiO₃ pellets with low Ag contents (below 20 wt%) have a dense structure and fine grain size. Abnormal grain growth of the Ag(30 wt%)-BaTiO₃ pellets occurs even at a low sintering temperature of 1000 °C. The Ag-BaTiO₃ pellet had a mixed crystal structure of BaTiO₃ and Ag phases. Silver is uniformly distributed in the BaTiO₃ matrix without phase separation. The dielectric constants of the BaTiO₃, Ag(10 wt%)-BaTiO₃, and Ag(30 wt%)-BaTiO₃ pellets are 830, 2130, and 4680, respectively.

Original language	English
Pages (from-to)	266-272
Number of pages	7
Journal	Materials Chemistry and Physics
Volume	140
Issue number	1
DOIs	https://doi.org/10.1016/j.matchemphys.2013.03.033
Publication status	Published - 2013 Jun 15
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MEST) (No. 2012R1A2A2A02046367 ). This research was supported by the Converging Research Center Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2011-50210 ).

Keywords

Composite materials Chemical synthesis Dielectric properties Nanostructures

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

Access to Document

10.1016/j.matchemphys.2013.03.033

Cite this

@article{28d2292448f9471f91c4056bb66eaad7,

title = "Core-shell-structure Ag-BaTiO3 composite nanopowders prepared directly by flame spray pyrolysis",

abstract = "Core-shell-structure Ag-BaTiO3 composite nanopowders are prepared directly by flame spray pyrolysis. The single-crystalline Ag was located in the core part of the composite powder, and the Ba and Ti components are uniformly distributed in the shell part. The X-ray diffraction (XRD) patterns of the Ag-BaTiO3 composite powders have the main crystal peaks of Ag and broad peaks at around 28. The Ag-BaTiO3 pellets with low Ag contents (below 20 wt%) have a dense structure and fine grain size. Abnormal grain growth of the Ag(30 wt%)-BaTiO3 pellets occurs even at a low sintering temperature of 1000 °C. The Ag-BaTiO3 pellet had a mixed crystal structure of BaTiO3 and Ag phases. Silver is uniformly distributed in the BaTiO3 matrix without phase separation. The dielectric constants of the BaTiO3, Ag(10 wt%)-BaTiO3, and Ag(30 wt%)-BaTiO3 pellets are 830, 2130, and 4680, respectively.",

keywords = "Composite materials Chemical synthesis Dielectric properties Nanostructures",

author = "Choi, {Seung Ho} and Ko, {You Na} and Lee, {Jung Kul} and Park, {Byung Kyu} and Kang, {Yun Chan}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MEST) (No. 2012R1A2A2A02046367 ). This research was supported by the Converging Research Center Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2011-50210 ).",

year = "2013",

month = jun,

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doi = "10.1016/j.matchemphys.2013.03.033",

language = "English",

volume = "140",

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AU - Choi, Seung Ho

AU - Ko, You Na

AU - Lee, Jung Kul

AU - Park, Byung Kyu

AU - Kang, Yun Chan

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MEST) (No. 2012R1A2A2A02046367 ). This research was supported by the Converging Research Center Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2011-50210 ).

PY - 2013/6/15

Y1 - 2013/6/15

N2 - Core-shell-structure Ag-BaTiO3 composite nanopowders are prepared directly by flame spray pyrolysis. The single-crystalline Ag was located in the core part of the composite powder, and the Ba and Ti components are uniformly distributed in the shell part. The X-ray diffraction (XRD) patterns of the Ag-BaTiO3 composite powders have the main crystal peaks of Ag and broad peaks at around 28. The Ag-BaTiO3 pellets with low Ag contents (below 20 wt%) have a dense structure and fine grain size. Abnormal grain growth of the Ag(30 wt%)-BaTiO3 pellets occurs even at a low sintering temperature of 1000 °C. The Ag-BaTiO3 pellet had a mixed crystal structure of BaTiO3 and Ag phases. Silver is uniformly distributed in the BaTiO3 matrix without phase separation. The dielectric constants of the BaTiO3, Ag(10 wt%)-BaTiO3, and Ag(30 wt%)-BaTiO3 pellets are 830, 2130, and 4680, respectively.

AB - Core-shell-structure Ag-BaTiO3 composite nanopowders are prepared directly by flame spray pyrolysis. The single-crystalline Ag was located in the core part of the composite powder, and the Ba and Ti components are uniformly distributed in the shell part. The X-ray diffraction (XRD) patterns of the Ag-BaTiO3 composite powders have the main crystal peaks of Ag and broad peaks at around 28. The Ag-BaTiO3 pellets with low Ag contents (below 20 wt%) have a dense structure and fine grain size. Abnormal grain growth of the Ag(30 wt%)-BaTiO3 pellets occurs even at a low sintering temperature of 1000 °C. The Ag-BaTiO3 pellet had a mixed crystal structure of BaTiO3 and Ag phases. Silver is uniformly distributed in the BaTiO3 matrix without phase separation. The dielectric constants of the BaTiO3, Ag(10 wt%)-BaTiO3, and Ag(30 wt%)-BaTiO3 pellets are 830, 2130, and 4680, respectively.

KW - Composite materials Chemical synthesis Dielectric properties Nanostructures

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