High-Q dielectrics using ZnO-modified Li 2TiO 3 ceramics for microwave applications

Cheng Liang Huang, Yu Wei Tseng, Jhih Yong Chen

研究成果: Article同行評審

54 引文 斯高帕斯(Scopus)

摘要

The microwave dielectric properties of the (1-x)Li 2TiO 3-xZnO (x=0.1-0.5) ceramic system prepared by mixed oxide route have been investigated. The rock-salt structured (1-x)Li 2TiO 3-xZnO were characterized by using X-ray diffraction spectra, scanning electron microcopy (SEM). The dielectric properties are strongly dependent on the compositions, the densifications and the microstructures of the specimens. The decrease of Q×f value at high-level ZnO addition (x>0.3) was owing to the intensity of the (002) superstructure reflection decreased and became disordered rock-salt structure. For practical applications, a new microwave dielectric material 0.7Li 2TiO 3-0.3ZnO is suggested and it possesses a good combination of dielectric properties with an e{open} r of ∼22.95, a Q×f of ∼99,800GHz (measured at 8.91GHz), and a τ f of ∼0ppm/°C. A low-loss dielectric resonant antenna using aperture-coupled cylindrical dielectric resonant was designed and fabricated using the proposed dielectric to study its performance.

原文English
頁(從 - 到)3287-3295
頁數9
期刊Journal of the European Ceramic Society
32
發行號12
DOIs
出版狀態Published - 2012 九月

All Science Journal Classification (ASJC) codes

  • 陶瓷和複合材料
  • 材料化學

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