Structural and electrical properties of BaTi4O9microwave ceramics incorporated with glass phase

S. G. Lu, Kin Wing Kwok, H. L.W. Chan, C. L. Choy

Research output: Journal article publicationConference articleAcademic researchpeer-review

46 Citations (Scopus)

Abstract

BaTi4O9(BT4) microwave ceramics incorporated with ZnO-B2O3glass phase were fabricated by a conventional mixed oxide reaction method. A density of 4400 kg m-3was gotten for ceramic sintered at 1200 °C for 2 h, very close to the theoretical density of 4533 kg m-3of pure BaTi4O9. Shifting of the vibration modes in FTIR and Raman spectra was observed for the ceramics sintered at a higher temperature. Partial melting was also observed in these ceramics. The relative permittivity of the ceramics changed between 45 and 50 as the sintering temperature increased from 1200 to 1400 °C. These results indicated that by the incorporation of the glass phase, the sintering temperature of BaTi4O9ceramics could be reduced to 1200 °C while the dielectric ceramics had larger relative permittivities.
Original languageEnglish
Pages (from-to)491-494
Number of pages4
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume99
Issue number1-3
DOIs
Publication statusPublished - 25 May 2003
EventAdvanced Electronic-ceramic Materials. Proceedings of the 8th IUMRS-ICEM 2002 - Xi'an, China
Duration: 10 Jun 200214 Jun 2002

Keywords

  • Electrical properties
  • FTIR
  • Glass phase
  • Microwave ceramics
  • Raman spectroscopy

ASJC Scopus subject areas

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

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