Mixture behavior and microwave dielectric properties of (1 - x)Ca2P2O7-xTiO2

In Sun Cho, Sang Ku Kang, Dong Wan Kim, Kug Sun Hong

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

(1 - x)β-Ca2P2O7-xTiO2 were prepared by solid-state reaction. The mixture behavior and microwave dielectric properties were investigated using X-ray powder diffraction and a network analyzer, respectively. X-ray powder diffraction patterns showed that β-Ca2P2 O7 and TiO2 existed in a mixture form, which was also confirmed by SEM analysis. It was shown that TiO2, which has positive temperature coefficient of the resonant frequency (τf), compensated the negative τf of β-Ca2P2O7 (-53 ppm/°C) through mixture formation. The variation of dielectric properties with a function of TiO2 contents could be explained using mixture rule. In the 0.3 < x < 0.4 regions, τf value could be successfully reduced almost zero. In particular, at x = 0.3, good microwave dielectric properties was obtained: Q × f = 44,000, εr = 10.9, and τf = -11 ppm/°C.

Original languageEnglish
Pages (from-to)2007-2010
Number of pages4
JournalJournal of the European Ceramic Society
Volume26
Issue number10-11
DOIs
Publication statusPublished - 2006

Keywords

  • Dielectric properties
  • Inclusions
  • TiO

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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