High Q microwave dielectric ceramics in the Li2 (Zn 1-xAx) Ti3O8 (A = Mg, Co; X = 0.02-0.1) system

Cheng-Liang Huang, Chia Hui Su, Chung Min Chang

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Abstract

Using a conventional solid-state reaction, followed by sintering at 1080°C-1200°C Li2(Zn1-xAx)Ti 3O8 (A = Mg, Co and x = 0.02-0.1) ceramic system with >96% density were prepared. The XRD patterns of the sintered samples revealed single-phase formation with a cubic crystal symmetry. The molecular volume shows good linear relationship with x value. The microwave dielectric properties of Li2(Zn1-xAx)Ti3O8 ceramics exhibited a significant dependence on the x value and to some extent on the morphology of the specimens. The Li2(Zn0.94Mg 0.06)Ti3O8 ceramics possess εr = 26.1, Q × f = 150 000 GHz, and τf = -13.9 ppm/°C, and Li2(Zn0.92Co0.08)Ti3O8 ceramics show εr = 24.7, Q × f = 140 000 GHz, and τf = -13.4 ppm/°C, respectively. It indicates a substantial increase in the Q × f in comparison with that of pure Li 2ZnTi3O8. The microwave dielectric properties of these partially substituted ceramics are reported for the first time.

Original languageEnglish
Pages (from-to)4146-4149
Number of pages4
JournalJournal of the American Ceramic Society
Volume94
Issue number12
DOIs
Publication statusPublished - 2011 Dec 1

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Geology
  • Geochemistry and Petrology
  • Materials Chemistry

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