Low-temperature firing and microwave dielectric properties of BaTi4O9 with Zn-B-O glass system

Dong Wan Kim, Duk Gyu Lee, Kug Sun Hong

Research output: Contribution to journalArticlepeer-review

96 Citations (Scopus)

Abstract

The effect of Zn-B-O (ZB) glass additions on the sintering temperature and microwave dielectric properties of BaTi4O9 has been investigated using X-ray diffraction, scanning electron microscopy, dilatometry and electrical characterization. It was found that the addition of small amount of glass to BaTi4O9 lowered the sintering temperature to ∼900°C while maintaining good microwave properties. In sintered samples with ZB glass, plate-like abnormal grains (∼5 μm) were observed. ZB glass heat-treated at 900°C for 2 h was crystallized to Zn(BO2)2 and Zn3(BO3)2, which coincides with second phases detected in low-temperature fired BaTi4O9. Thus it can be concluded that there is a negligible reaction forming other second phases between BaTi4O9 and ZB glass. BaTi4O9 ceramics sintered at 900°C for 2 h had good microwave dielectric properties: relative dielectric constant (εr) = 33, quality factor (Qxf) = 27000, and temperature coefficient of resonant frequency (τf) = 7 ppm/°C.

Original languageEnglish
Pages (from-to)585-595
Number of pages11
JournalMaterials Research Bulletin
Volume36
Issue number3-4
DOIs
Publication statusPublished - 2001 Feb
Externally publishedYes

Keywords

  • A. Ceramics
  • A. Glasses
  • C. Electron microscopy
  • C. X-ray diffraction
  • D. Dielectric properties

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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