Characteristics of BaO-B2O3-SiO2 nano glass powders prepared by flame spray pyrolysis as the sintering agent of BaTiO3 ceramics

Seung Ho Choi, You Na Ko, Jung Hyun Kim, Young Jun Hong, Yun Chan Kang

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Nanosized BaO-B2O3-SiO2 glass powders are directly prepared by flame spray pyrolysis. The mean size of the BaO-B 2O3-SiO2 glass powders with amorphous phase and spherical shape is 30 nm. The effects of glass powders on the sintering characteristics of the BaTiO3 pellet formed from the nanosized BaTiO3 powders are investigated. The mean size and BET surface area of the BaTiO3 powders prepared by spray pyrolysis are 110 nm and 9.1 m2/g. The BaTiO3 pellet with glass additive has large grain size with several microns, dense structure and pure tetragonal crystal structure at a sintering temperature of 1000 °C. The XRD pattern of the pellet has distinct split of (2 0 0) and (0 0 2) peaks at 2θ ≈ 44.95°. The dielectric constant of the pellet without glass additive is 2180. However, the dielectric constants of the pellets with 1, 3, 5 and 7 wt% glass additive with respect to BaTiO3 are 2496, 2514, 2700 and 2225, respectively.

Original languageEnglish
Pages (from-to)7979-7984
Number of pages6
JournalJournal of Alloys and Compounds
Volume509
Issue number30
DOIs
Publication statusPublished - 2011 Jul 28
Externally publishedYes

Keywords

  • Barium titanate
  • Dielectric material
  • Glass powder
  • Nano powders
  • Spray pyrolysis

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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