New dielectric material system of La(Mg1/2Ti 1/2)O3-CaTiO3 at microwave frequencies

Cheng Liang Huang, Yuan Bin Chen, L. O. Ching-Wen

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11 Citations (Scopus)


The dielectric characteristics and microstructures of xLa(Mg 1/2Ti1/2)O3-(1-x)CaTiO3 ceramics with B2O3 additive (0.25 wt%) prepared by the conventional solid-state method were investigated. Doping with B 2O3 (0.25 wt%) effectively improves the densification and the dielectric characteristics of xLa(Mg1/2Ti1/2)O 3-(1-x)CaTiO3 ceramics. xLa(Mg1/2Ti 1/2)O3-(1 - x)CaTiO3 ceramics can be sintered at 1400°C because of the liquid phase effect of B2O3 addition observed by scanning electron microscopy. At 1450°C, 0.5La(Mg 1/2Ti1/2)O3-0.5CaTiO3 ceramics with 0.25 wt% B2O3 additive have a dielectric constant (εr) of 43, a Q × f value of 24470 (at 8 GHz) and a temperature coefficient of resonant frequency (τf) of -8.94 ppm/°C. As the content of La(Mg1/2Ti1/2)O3 increases, the highest Q × f value of 38000 (GHz) for x = 0.7 is achieved at the sintering temperature of 1475°C.

Original languageEnglish
Pages (from-to)3147-3150
Number of pages4
JournalJapanese Journal of Applied Physics
Issue number5 A
Publication statusPublished - 2005 May

All Science Journal Classification (ASJC) codes

  • General Engineering
  • General Physics and Astronomy


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