High-Q microwave dielectric in the (1 - x)MgTiO3-xCa0.6La0.8/3TiO3 ceramic system with a near-zero temperature coefficient of the resonant frequency

Cheng-Liang Huang, Shih Sheng Liu

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15 Citations (Scopus)


The microwave dielectric properties and microstructures of the new (1 - x)MgTiO3-xCa0.6La0.8/3TiO3 ceramic system, prepared using a mixed oxide route, were investigated. Combination of MgTiO3 (MT) and Ca0.6La0.8/3TiO3 (CLT) forms a two-phase system and leads to a near-zero τf. With increasing x, the microwave Q × f decreased and εr increased. A microwave dielectric material having a εr of 25.45, a Q × f of ~ 82,500 GHz (at 8.5 GHz), and a τf of ~ 0.5 ppm/°C can be obtained from the compound 0.85MgTiO3-0.15Ca0.6La0.8/3TiO3 sintered at 1275 °C for 4 h. It is proposed as a candidate material for ISM band components and GPS antennas.

Original languageEnglish
Pages (from-to)3205-3208
Number of pages4
JournalMaterials Letters
Issue number17-18
Publication statusPublished - 2008 Jun 30

All Science Journal Classification (ASJC) codes

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


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