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 journalArticle

4 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 languageEnglish
Pages (from-to)266-272
Number of pages7
JournalMaterials Chemistry and Physics
Volume140
Issue number1
DOIs
Publication statusPublished - 2013 Jun 15

Keywords

  • Composite materials Chemical synthesis Dielectric properties Nanostructures

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Core-shell-structure Ag-BaTiO<sub>3</sub> composite nanopowders prepared directly by flame spray pyrolysis'. Together they form a unique fingerprint.

  • Cite this