High-dielectric-constant and low-loss microwave dielectric in the (1 - X)La(Mg0.5Ti0.5)O3-x(Ca0.8Sr 0.2)TiO3 solid solution system

Cheng Liang Huang, Jhih Yong Chen

研究成果: Letter

7 引文 斯高帕斯(Scopus)

摘要

The microwave dielectric properties and microstructures of (1 - x)La(Mg0.5Ti0.5)O3-x(Ca0.8Sr 0.2)TiO3 ceramics, prepared by a mixed oxide route, have been investigated. The forming of solid solutions was confirmed by the XRD patterns and the measured lattice parameters for all compositions. A near zero τf was achieved for samples with x = 0.5, although the dielectric properties varied with sintering temperature. The Q × f value of 0.5La(Mg0.5Ti0.5)O3-0.5(Ca0.8Sr 0.2)TiO3 increased up to 1475 °C, after which it decreased. The decrease in dielectric properties was coincident with the onset of rapid grain growth. The optimum combination of microwave dielectric properties was achieved at 1475 °C for samples where x = 0.5 with a dielectric constant εr of 47.12, a Q × f value of 35,000 GHz (measured at 6.2 GHz) and a τf value of -4.7 ppm/°C.

原文English
頁(從 - 到)L99-L102
期刊Journal of Alloys and Compounds
509
發行號6
DOIs
出版狀態Published - 2011 二月 10

    指紋

All Science Journal Classification (ASJC) codes

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

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