Effect of CaTiO3 addition on microwave dielectric properties of Mg2(Ti0.95Sn0.05)O4 ceramics

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The microwave dielectric properties of CaTiO3-added Mg 2(Ti0.95Sn0.05)O4 ceramics prepared by the mixed oxide route have been investigated. The combination of spinel-structured Mg2(Ti0.95Sn0.05)O 4 and perovskite-structured CaTiO3 forms a two-phase system (1 - x)Mg2(Ti0.95Sn0.05)O 4-xCaTiO3, which was confirmed by the XRD patterns and the EDX analysis and it also leads to a zero τf. The microwave dielectric properties of the ceramics can be effectively controlled by varying the x value. For practical applications, a new microwave dielectric material 0.91Mg2(Ti0.95Sn0.05)O4-0. 09CaTiO3 is suggested and it possesses a good combination of dielectric properties with an εr of ∼18.01, a Q × f of ∼92,000 GHz, and a τf of ∼0 ppm/°C, which makes it is a very promising candidate material for high frequency applications.

Original languageEnglish
Pages (from-to)4247-4251
Number of pages5
JournalJournal of Alloys and Compounds
Issue number11
Publication statusPublished - 2011 Mar 17

All Science Journal Classification (ASJC) codes

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


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