Low temperature sintering and microwave dielectric properties of Ba2Ti9O20 ceramics with 3ZnO-B2O3 addition

Ying Chieh Lee, Wen Hsi Lee, Fuh Sheng Shieu

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Abstract

Boron and zinc oxide (ZnBO) glass added in dielectric materials have drawn a great attention recently due to the low firing temperature. Microwave dielectric properties of the Ba2Ti9O20-based ceramics with ZnBO addition up to 3 wt% were investigated at the sintering temperatures ranging from 900 to 960°C. Effects of the ZnBO addition on the bulk density, microstructure, and dielectric properties of the Ba2Ti9O20-based ceramics at microwave frequency were elucidated. X-ray diffraction (XRD) results show the presence of five crystalline phases. Ba2Ti9O20, BaZr(BO3)2, BaTi3O7, BaZrO3 and Zn2SiO4 in the sintered ceramics, depending upon the amount of ZnBO addition. Optimum dielectric properties were obtained for the Ba2Ti9O20-based ceramic with 1 wt% ZnBO addition and sintered in air at 940°C for 2h, having the dielectric properties: Q = 1137 (Q × f = 8300), εr value = 27.3, and τf = 2.5ppm/°C.

Original languageEnglish
Pages (from-to)6049-6053
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume41
Issue number10
Publication statusPublished - 2002 Oct 1

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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