Microwave dielectric properties of (Mg0.95Ni0.05) TiO3-SrTiO3 ceramics with a near-zero temperature coefficient of resonant frequency

Chun Hsu Shen, Cheng-Liang Huang

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The microwave dielectric properties of a (1-x)(Mg0.95Ni 0.05)TiO3-xSrTiO3 ceramics system were investigated. The system was prepared using a conventional solid-state ceramic method. To produce a temperature-stable material, SrTiO3 was added, which led to a near-zero temperature variation in resonant frequency. The variation in microwave dielectric properties of the (1-x)(Mg 0.95Ni0.05)TiO3-xSrTiO3 ceramics system significantly depends on the amount of SrTiO3 present. As x was varied from 0.01 to 0.1, the microwave Q × f value decreased from 105,000 to 31,000 GHz and the dielectric constant (εr) increased from 18.74 to 26.5. A microwave dielectric material with a dielectric constant (εr) of 21, a Q × f value of 73,000 GHz, and a τf value of 1 ppm/°C were obtained from the compound 0.96(Mg0.95Ni0.05)TiO3-0.04SrTiO3 sintered at 1300°C for 4 h. To verify the performance of the 0.96(Mg 0.95Ni0.05)TiO3-0.04SrTiO3 ceramics, a band-pass filter with traditional hairpin resonators was designed and simulated on different dielectric materials [such as FR4, alumina, and 0.96(Mg0.95Ni0.05)TiO3-0.04SrTiO3].

Original languageEnglish
Pages (from-to)207-216
Number of pages10
JournalInternational Journal of Applied Ceramic Technology
Issue number2
Publication statusPublished - 2010 Mar 1

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Condensed Matter Physics
  • Marketing
  • Materials Chemistry

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