Microwave dielectric properties of a new ceramic system (1 - x)(Mg0.95Zn0.05)TiO3-xCaTiO3 at microwave frequencies

Cheng Liang Huang, Shih Sheng Liu

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The microwave dielectric properties and microstructure of the two-phase (Mg0.95Zn0.05)TiO3-CaTiO3 ceramic system were investigated. Dielectric properties of (Mg0.95Zn0.05)TiO3 ceramics could be effectively promoted by adding CaTiO3 to the specimen. At 1300 °C, 0.95(Mg0.95Zn0.05)TiO3-0.05CaTiO3 ceramic possesses good combination of microwave dielectric properties; a dielectric constant εr of ∼ 20.4, a Q × f value of ∼ 109,300 GHz (at 10 GHz), and a τf value of ∼ - 12.42 ppm/°C. The τf value is strongly correlated to the compositions and can be controlled through the compositional ratio. With x = 0.07, a dielectric constant εr of ∼ 22.6, a Q × f value of ∼ 93,200 GHz (at 10 GHz), and a τf value of ∼ - 2.62 ppm/°C was obtained for 0.93(Mg0.95Zn0.05)TiO3-0.07CaTiO3 ceramic sintered at 1300 °C for 4 h.

Original languageEnglish
Pages (from-to)3773-3775
Number of pages3
JournalMaterials Letters
Issue number21-22
Publication statusPublished - 2008 Aug 15

All Science Journal Classification (ASJC) codes

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

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