Crystal structure and dielectric properties of xCa(Mg1/3Nb2/3)O3-(1 - x)(Ca0.61Nd0.26)TiO3 at the microwave frequency

Cheng Liang Huang, Yu Hua Chien, Chuan Feng Shih, Hsien Yuan Chang

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10 Citations (Scopus)

Abstract

The microwave dielectric properties of the xCa(Mg1/3Nb2/3)O3-(1 - x)Ca0.61Nd0.26TiO3 ceramic system (x = 0.2, 0.4, 0.6, and 0.8) were investigated. The crystal structures and the microstructures of the ceramics were characterized using X-ray diffraction and scanning electron microscopy analyses, respectively. A near-zero temperature coefficient of resonant frequency was achieved by adjusting the x value of the system. When the x value was increased from 0.2 to 0.8, the dielectric constant εr decreased from 83 to 34, the quality factor value (Q x f) increased from 13,000 to 45,000 GHz, and the temperature coefficient of resonant frequency (τr) decreased from 85 to -21 ppm/°C. The 0.6Ca(Mg1/3Nb2/3)O3-0.4Ca0.61Nd0.26TiO3 ceramic system is suitable for microwave dielectric resonator applications, as it has an εr value of ∼47, a Q x f value of ∼37,000 GHz, and a τr value of ∼5 ppm/°C.

Original languageEnglish
Pages (from-to)1-5
Number of pages5
JournalMaterials Research Bulletin
Volume63
DOIs
Publication statusPublished - 2015 Mar

All Science Journal Classification (ASJC) codes

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

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