x(Mg0.7Zn0.3)0.95Co0.05TiO3-(1-x)(La0.5Na0.5)TiO3 ceramic at microwave frequency with a near zero temperature coefficient of resonant frequency

Cheng Liang Huang, Shih Hung Lin, Shih Sheng Liu, Yuan Bin Chen

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15 Citations (Scopus)

Abstract

Dielectric properties of x(Mg0.7Zn0.3)0.95Co0.05TiO3-(1-x)(La0.5Na0.5)TiO3 ceramic were investigated at microwave frequencies. A nearly 0 ppm/°C temperature coefficient of resonant frequency was realized at x = 0.9. A two-phase system was confirmed by XRD analysis. A dielectric material applicable to microwave devices with a Q × f of 20,000-87,000 GHz and a dielectric constant of 21.27-26.2 was obtained at 1100 °C after 4 h of sintering. The microwave dielectric material 0.9(Mg0.7Zn0.3)0.95Co0.05TiO3-0.1(La0.5Na0.5)TiO3 sintered at 1150 °C for 4 h has a dielectric constant of 24.56, a Q × f of 68,000 GHz, and a τf value of 0 ppm/°C. It is proposed as a candidate dielectric for GPS patch antennas.

Original languageEnglish
Pages (from-to)541-544
Number of pages4
JournalJournal of Alloys and Compounds
Volume489
Issue number2
DOIs
Publication statusPublished - 2010 Jan 21

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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