A novel low-loss microwave dielectric using (Ca0.8Sr0.2)TiO3-modified (Mg0.95Co0.05)2TiO4 ceramics

Jhih Yong Chen, Cheng Liang Huang

Research output: Contribution to journalLetterpeer-review

7 Citations (Scopus)


The microwave dielectric properties of conventional solid-state route prepared (1 - x)(Mg0.95Co0.05)2TiO4-x(Ca0.8Sr0.2)TiO3 ceramic system have been investigated. A two-phase system was confirmed by the X-ray diffraction patterns. (Mg0.95Co0.05)TiO3 was also detected as a second phase in the system. The microwave dielectric properties are strongly related to the density and the morphology of the specimens. The presence of the second phase, however, would cause no significant variation in the dielectric properties of the specimen because it possesses similar properties compared to that of the main phase (Mg0.95Co0.05)2TiO4. Specimen using 0.92(Mg0.95Co0.05)2TiO4-0.08(Ca0.8Sr0.2)TiO3 leads to a good combination of microwave dielectric properties with an εr of 19.22, a Q × f of 123,200 GHz (at 9.2 GHz) and a τf value of 2.8 ppm/°C. It is proposed as a candidate dielectric for applications in GPS patch antennas and 3G passive components.

Original languageEnglish
Pages (from-to)L10-L13
JournalJournal of Alloys and Compounds
Issue number1-2
Publication statusPublished - 2010 Apr 30

All Science Journal Classification (ASJC) codes

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


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