Effects of B2O3 on the performance of BaO-Sm2O3-TiO2 microwave dielectric ceramics

Bin Li, Qi Tu Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

To develop the ceramic material with low-temperature sintering and high-ε microwave dielectric to fulfill the miniaturization of microwave ceramic capacitors, low melting point oxides were added into BaO-Sm2O3-TiO2 (BST) microwave dielectric ceramics to decrease the sintering temperature. The phase composition and microstructure of the ceramics were examined by X-ray diffraction radiation and scanning electron microscope, respectively. The dielectric property was measured by an impedance analyzer. Results indicated that, in Ba4(Sm1-0.15 Bi0.15)28/3Ti18O54 system, the sintering temperature was 1060°C when the adding content of ZnO and B2O3 was 3wt% and 2wt%, respectively. The performance of BST microwave dielectric ceramics was listed as follows: εr≈64, tanδ≈1.2×10-3, τf=-8.3×10-5/°C. The ceramic material would be a promising candidate for microwave resonators and filters.

Original languageEnglish
Pages (from-to)662-665
Number of pages4
JournalCailiao Kexue yu Gongyi/Material Science and Technology
Volume17
Issue number5
StatePublished - Oct 2009

Keywords

  • Dielectric constant
  • Dielectric loss
  • Low melting point oxide
  • Microwave dielectric ceramics

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